UI/UserInterface.py

# -*- coding: utf-8 -*-

# Copyright (c) 2002 - 2010 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module implementing the main user interface.
"""

import os
import sys
import logging

from PyQt4.QtCore import *
from PyQt4.QtGui import *
from PyQt4.Qsci import QSCINTILLA_VERSION_STR
from PyQt4.QtNetwork import QNetworkProxyFactory, QNetworkAccessManager, \
    QNetworkRequest, QNetworkReply

from Debugger.DebugUI import DebugUI
from Debugger.DebugServer import DebugServer
from Debugger.DebugViewer import DebugViewer
from Debugger.DebugClientCapabilities import HasUnittest

from QScintilla.Shell import Shell
from QScintilla.Terminal import Terminal
from QScintilla.MiniEditor import MiniEditor
from QScintilla.SpellChecker import SpellChecker

from PyUnit.UnittestDialog import UnittestDialog

from Helpviewer.HelpWindow import HelpWindow

from Preferences.ConfigurationDialog import ConfigurationDialog
from Preferences.ViewProfileDialog import ViewProfileDialog
from Preferences.ShortcutsDialog import ShortcutsDialog
from Preferences.ToolConfigurationDialog import ToolConfigurationDialog
from Preferences.ToolGroupConfigurationDialog import ToolGroupConfigurationDialog
from Preferences.ProgramsDialog import ProgramsDialog
from Preferences import Shortcuts

from PluginManager.PluginManager import PluginManager
from PluginManager.PluginInfoDialog import PluginInfoDialog
from PluginManager.PluginInstallDialog import PluginInstallDialog
from PluginManager.PluginUninstallDialog import PluginUninstallDialog
from PluginManager.PluginRepositoryDialog import PluginRepositoryDialog

from Project.Project import Project
from Project.ProjectBrowser import ProjectBrowser

from MultiProject.MultiProject import MultiProject
from MultiProject.MultiProjectBrowser import MultiProjectBrowser

from Tasks.TaskViewer import TaskViewer

from Templates.TemplateViewer import TemplateViewer

from Cooperation.ChatWidget import ChatWidget

from .Browser import Browser
from .Info import *
from . import Config
from .EmailDialog import EmailDialog
from .DiffDialog import DiffDialog
from .CompareDialog import CompareDialog
from .LogView import LogViewer
from .FindFileDialog import FindFileDialog
from .FindFileNameDialog import FindFileNameDialog
from .SymbolsWidget import SymbolsWidget
from .NumbersWidget import NumbersWidget

from E5Gui.E5SingleApplication import E5SingleApplicationServer
from E5Gui.E5Action import E5Action, createActionGroup
from E5Gui.E5ToolBarManager import E5ToolBarManager
from E5Gui.E5ToolBarDialog import E5ToolBarDialog
from E5Gui.E5SqueezeLabels import E5SqueezeLabelPath
from E5Gui.E5ToolBox import E5VerticalToolBox, E5HorizontalToolBox
from E5Gui.E5SideBar import E5SideBar
from E5Gui import E5MessageBox
from E5Gui.E5Application import e5App

from VCS.StatusMonitorLed import StatusMonitorLed

import Preferences
import ViewManager
import Utilities

from Graphics.PixmapDiagram import PixmapDiagram
from Graphics.SvgDiagram import SvgDiagram

import UI.PixmapCache

from E5XML.TasksReader import TasksReader
from E5XML.TasksWriter import TasksWriter
from E5XML.SessionReader import SessionReader
from E5XML.SessionWriter import SessionWriter

from E5Network.E5NetworkProxyFactory import E5NetworkProxyFactory, \
    proxyAuthenticationRequired

from IconEditor.IconEditorWindow import IconEditorWindow

from eric5config import getConfig


class Redirector(QObject):
    """
    Helper class used to redirect stdout and stderr to the log window
    
    @signal appendStderr(str) emitted to write data to stderr logger
    @signal appendStdout(str) emitted to write data to stdout logger
    """
    appendStderr = pyqtSignal(str)
    appendStdout = pyqtSignal(str)
    
    def __init__(self, stderr):
        """
        Constructor
        
        @param stderr flag indicating stderr is being redirected
        """
        QObject.__init__(self)
        self.stderr = stderr
        self.buffer = ''
        
    def __nWrite(self, n):
        """
        Private method used to write data.
        
        @param n max number of bytes to write
        """
        if n:
            line = self.buffer[:n]
            if self.stderr:
                self.appendStderr.emit(line)
            else:
                self.appendStdout.emit(line)
            self.buffer = self.buffer[n:]
            
    def __bufferedWrite(self):
        """
        Private method returning number of characters to write.
        
        @return number of characters buffered or length of buffered line (integer)
        """
        return self.buffer.rfind('\n') + 1
        
    def flush(self):
        """
        Public method used to flush the buffered data.
        """
        self.__nWrite(len(self.buffer))
        
    def write(self, s):
        """
        Public method used to write data.
        
        @param s data to be written (it must support the str-method)
        """
        self.buffer += str(s)
        self.__nWrite(self.__bufferedWrite())

class UserInterface(QMainWindow):
    """
    Class implementing the main user interface.
    
    @signal appendStderr(str) emitted to write data to stderr logger
    @signal appendStdout(str) emitted to write data to stdout logger
    @signal preferencesChanged() emitted after the preferences were changed
    @signal reloadAPIs() emitted to reload the api information
    @signal showMenu(str, QMenu) emitted when a menu is about to be shown. The name
            of the menu and a reference to the menu are given.
    """
    appendStderr = pyqtSignal(str)
    appendStdout = pyqtSignal(str)
    preferencesChanged = pyqtSignal()
    reloadAPIs = pyqtSignal()
    showMenu = pyqtSignal(str, QMenu)
    
    maxFilePathLen = 100
    maxSbFilePathLen = 150
    maxMenuFilePathLen = 75
    
    def __init__(self, app, locale, splash, plugin, noOpenAtStartup, restartArguments):
        """
        Constructor
        
        @param app reference to the application object (E5Application)
        @param locale locale to be used by the UI (string)
        @param splash reference to the splashscreen (UI.SplashScreen.SplashScreen)
        @param plugin filename of a plugin to be loaded (used for plugin development)
        @param noOpenAtStartup flag indicating that the open at startup option
            should not be executed (boolean)
        @param restartArguments list of command line parameters to be used for a
            restart (list of strings)
        """
        QMainWindow.__init__(self)
        self.setAttribute(Qt.WA_DeleteOnClose)
        
        self.__restartArgs = restartArguments[:]
        
        self.defaultStyleName = QApplication.style().objectName()
        self.__setStyle()
        
        self.maxEditorPathLen = Preferences.getUI("CaptionFilenameLength")
        self.locale = locale
        self.__noOpenAtStartup = noOpenAtStartup
        
        self.layout, self.embeddedShell, self.embeddedFileBrowser = \
            Preferences.getUILayout()
        
        self.passiveMode = Preferences.getDebugger("PassiveDbgEnabled")
        
        g = Preferences.getGeometry("MainGeometry")
        if g.isEmpty():
            s = QSize(800, 600)
            self.resize(s)
        else:
            self.restoreGeometry(g)
        self.__startup = True
        
        self.__proxyFactory = E5NetworkProxyFactory()
        QNetworkProxyFactory.setApplicationProxyFactory(self.__proxyFactory)
        
        self.capProject = ""
        self.capEditor = ""
        self.captionShowsFilename = Preferences.getUI("CaptionShowsFilename")
        
        QApplication.setWindowIcon(UI.PixmapCache.getIcon("eric.png"))
        self.setWindowIcon(UI.PixmapCache.getIcon("eric.png"))
        self.__setWindowCaption()
        
        # load the view profiles
        self.profiles = Preferences.getUI("ViewProfiles")
        
        # Generate the debug server object
        debugServer = DebugServer()
        
        # Generate an empty project object and multi project object
        self.project = Project(self)
        self.multiProject = MultiProject(self.project, self)
        
        splash.showMessage(self.trUtf8("Initializing Plugin Manager..."))
        
        # Initialize the Plugin Manager (Plugins are initialized later
        self.pluginManager = PluginManager(self, develPlugin = plugin)
        
        splash.showMessage(self.trUtf8("Generating Main User Interface..."))
        
        # Create the main window now so that we can connect QActions to it.
        logging.debug("Creating Layout...")
        self.__createLayout(debugServer)
        
        # Generate the debugger part of the ui
        logging.debug("Creating Debugger UI...")
        self.debuggerUI = DebugUI(self, self.viewmanager, debugServer, 
                                  self.debugViewer, self.project)
        self.debugViewer.setDebugger(self.debuggerUI)
        self.shell.setDebuggerUI(self.debuggerUI)
        
        # Generate the redirection helpers
        self.stdout = Redirector(False)
        self.stderr = Redirector(True)
        
        # Genrae the programs dialog
        logging.debug("Creating Programs Dialog...")
        self.programsDialog = ProgramsDialog(self)
        
        # Generate the shortcuts configuration dialog
        logging.debug("Creating Shortcuts Dialog...")
        self.shortcutsDialog = ShortcutsDialog(self, 'Shortcuts')
        
        # now setup the connections
        splash.showMessage(self.trUtf8("Setting up connections..."))
        app.focusChanged.connect(
            self.viewmanager.appFocusChanged)
        self.browser.sourceFile[str].connect(
            self.viewmanager.openSourceFile)
        self.browser.sourceFile[str, int].connect(
            self.viewmanager.openSourceFile)
        self.browser.sourceFile[str, int, str].connect(
            self.viewmanager.openSourceFile)
        self.browser.designerFile.connect(self.__designer)
        self.browser.linguistFile.connect(self.__linguist4)
        self.browser.projectFile.connect(self.project.openProject)
        self.browser.multiProjectFile.connect(self.multiProject.openMultiProject)
        self.browser.pixmapEditFile.connect(self.__editPixmap)
        self.browser.pixmapFile.connect(self.__showPixmap)
        self.browser.svgFile.connect(self.__showSvg)
        self.browser.unittestOpen.connect(self.__unittestScript)
        self.browser.trpreview.connect(self.__TRPreviewer)
        
        self.debugViewer.exceptionLogger.sourceFile.connect(
            self.viewmanager.openSourceFile)
        
        self.debugViewer.sourceFile.connect(self.viewmanager.showDebugSource)
        
        self.taskViewer.displayFile.connect(self.viewmanager.openSourceFile)
        
        self.projectBrowser.psBrowser.sourceFile[str].connect(
            self.viewmanager.openSourceFile)
        self.projectBrowser.psBrowser.sourceFile[str, int].connect(
            self.viewmanager.openSourceFile)
        self.projectBrowser.psBrowser.sourceFile[str, int, str].connect(
            self.viewmanager.openSourceFile)
        self.projectBrowser.psBrowser.closeSourceWindow.connect(
            self.viewmanager.closeWindow)
        self.projectBrowser.psBrowser.unittestOpen.connect(self.__unittestScript)
        
        self.projectBrowser.pfBrowser.designerFile.connect(self.__designer)
        self.projectBrowser.pfBrowser.sourceFile.connect(
            self.viewmanager.openSourceFile)
        self.projectBrowser.pfBrowser.uipreview.connect(self.__UIPreviewer)
        self.projectBrowser.pfBrowser.trpreview.connect(self.__TRPreviewer)
        self.projectBrowser.pfBrowser.closeSourceWindow.connect(
            self.viewmanager.closeWindow)
        self.projectBrowser.pfBrowser.appendStderr.connect(self.appendToStderr)
        
        self.projectBrowser.prBrowser.sourceFile.connect(
            self.viewmanager.openSourceFile)
        self.projectBrowser.prBrowser.closeSourceWindow.connect(
            self.viewmanager.closeWindow)
        self.projectBrowser.prBrowser.appendStderr.connect(self.appendToStderr)
        
        self.projectBrowser.ptBrowser.linguistFile.connect(self.__linguist4)
        self.projectBrowser.ptBrowser.sourceFile.connect(
            self.viewmanager.openSourceFile)
        self.projectBrowser.ptBrowser.trpreview[list].connect(self.__TRPreviewer)
        self.projectBrowser.ptBrowser.trpreview[list, bool].connect(self.__TRPreviewer)
        self.projectBrowser.ptBrowser.closeSourceWindow.connect(
            self.viewmanager.closeWindow)
        self.projectBrowser.ptBrowser.appendStdout.connect(self.appendToStdout)
        self.projectBrowser.ptBrowser.appendStderr.connect(self.appendToStderr)
        
        self.projectBrowser.piBrowser.sourceFile[str].connect(
            self.viewmanager.openSourceFile)
        self.projectBrowser.piBrowser.sourceFile[str, int].connect(
            self.viewmanager.openSourceFile)
        self.projectBrowser.piBrowser.closeSourceWindow.connect(
            self.viewmanager.closeWindow)
        self.projectBrowser.piBrowser.appendStdout.connect(self.appendToStdout)
        self.projectBrowser.piBrowser.appendStderr.connect(self.appendToStderr)
        
        self.projectBrowser.poBrowser.sourceFile.connect(
            self.viewmanager.openSourceFile)
        self.projectBrowser.poBrowser.closeSourceWindow.connect(
            self.viewmanager.closeWindow)
        self.projectBrowser.poBrowser.pixmapEditFile.connect(self.__editPixmap)
        self.projectBrowser.poBrowser.pixmapFile.connect(self.__showPixmap)
        self.projectBrowser.poBrowser.svgFile.connect(self.__showSvg)
        
        self.project.sourceFile.connect(self.viewmanager.openSourceFile)
        self.project.newProject.connect(self.viewmanager.newProject)
        self.project.projectOpened.connect(self.viewmanager.projectOpened)
        self.project.projectClosed.connect(self.viewmanager.projectClosed)
        self.project.projectFileRenamed.connect(self.viewmanager.projectFileRenamed)
        self.project.lexerAssociationsChanged.connect(
            self.viewmanager.projectLexerAssociationsChanged)
        self.project.newProject.connect(self.__newProject)
        self.project.projectOpened.connect(self.__projectOpened)
        self.project.projectOpened.connect(self.__activateProjectBrowser)
        self.project.projectClosed.connect(self.__projectClosed)
        
        self.multiProject.multiProjectOpened.connect(self.__activateMultiProjectBrowser)
        
        self.debuggerUI.resetUI.connect(self.viewmanager.handleResetUI)
        self.debuggerUI.resetUI.connect(self.debugViewer.handleResetUI)
        self.debuggerUI.resetUI.connect(self.__setEditProfile)
        self.debuggerUI.debuggingStarted.connect(self.browser.handleProgramChange)
        self.debuggerUI.debuggingStarted.connect(
            self.debugViewer.exceptionLogger.debuggingStarted)
        self.debuggerUI.debuggingStarted.connect(self.debugViewer.handleDebuggingStarted)
        self.debuggerUI.debuggingStarted.connect(self.__programChange)
        self.debuggerUI.debuggingStarted.connect(self.__debuggingStarted)
        self.debuggerUI.compileForms.connect(
            self.projectBrowser.pfBrowser.compileChangedForms)
        self.debuggerUI.compileResources.connect(
            self.projectBrowser.prBrowser.compileChangedResources)
        
        debugServer.passiveDebugStarted.connect(
            self.debugViewer.exceptionLogger.debuggingStarted)
        debugServer.passiveDebugStarted.connect(self.debugViewer.handleDebuggingStarted)
        debugServer.clientException.connect(self.debugViewer.exceptionLogger.addException)
        debugServer.clientLine.connect(
            self.debugViewer.breakpointViewer.highlightBreakpoint)
        debugServer.clientProcessStdout.connect(self.appendToStdout)
        debugServer.clientProcessStderr.connect(self.appendToStderr)
        
        self.stdout.appendStdout.connect(self.appendToStdout)
        self.stderr.appendStderr.connect(self.appendToStderr)
        
        self.preferencesChanged.connect(self.viewmanager.preferencesChanged)
        self.reloadAPIs.connect(self.viewmanager.getAPIsManager().reloadAPIs)
        self.preferencesChanged.connect(self.logViewer.preferencesChanged)
        self.appendStdout.connect(self.logViewer.appendToStdout)
        self.appendStderr.connect(self.logViewer.appendToStderr)
        self.preferencesChanged.connect(self.shell.handlePreferencesChanged)
        self.preferencesChanged.connect(self.terminal.handlePreferencesChanged)
        self.preferencesChanged.connect(self.project.handlePreferencesChanged)
        self.preferencesChanged.connect(self.projectBrowser.handlePreferencesChanged)
        self.preferencesChanged.connect(
            self.projectBrowser.psBrowser.handlePreferencesChanged)
        self.preferencesChanged.connect(
            self.projectBrowser.pfBrowser.handlePreferencesChanged)
        self.preferencesChanged.connect(
            self.projectBrowser.prBrowser.handlePreferencesChanged)
        self.preferencesChanged.connect(
            self.projectBrowser.ptBrowser.handlePreferencesChanged)
        self.preferencesChanged.connect(
            self.projectBrowser.piBrowser.handlePreferencesChanged)
        self.preferencesChanged.connect(
            self.projectBrowser.poBrowser.handlePreferencesChanged)
        self.preferencesChanged.connect(self.browser.handlePreferencesChanged)
        self.preferencesChanged.connect(self.taskViewer.handlePreferencesChanged)
        self.preferencesChanged.connect(self.pluginManager.preferencesChanged)
        self.preferencesChanged.connect(debugServer.preferencesChanged)
        self.preferencesChanged.connect(self.cooperation.preferencesChanged)
        
        self.viewmanager.editorSaved.connect(self.project.repopulateItem)
        self.viewmanager.lastEditorClosed.connect(self.__lastEditorClosed)
        self.viewmanager.editorOpened.connect(self.__editorOpened)
        self.viewmanager.changeCaption.connect(self.__setWindowCaption)
        self.viewmanager.checkActions.connect(self.__checkActions)
        self.viewmanager.editorChanged.connect(self.projectBrowser.handleEditorChanged)
        self.viewmanager.checkActions.connect(self.cooperation.checkEditorActions)
        
        self.cooperation.shareEditor.connect(self.viewmanager.shareEditor)
        self.cooperation.startEdit.connect(self.viewmanager.startSharedEdit)
        self.cooperation.sendEdit.connect(self.viewmanager.sendSharedEdit)
        self.cooperation.cancelEdit.connect(self.viewmanager.cancelSharedEdit)
        self.cooperation.connected.connect(self.viewmanager.shareConnected)
        self.cooperation.editorCommand.connect(self.viewmanager.receive)
        self.viewmanager.setCooperationClient(self.cooperation.getClient())
        
        self.symbolsViewer.insertSymbol.connect(self.viewmanager.insertSymbol)
        
        self.numbersViewer.insertNumber.connect(self.viewmanager.insertNumber)
        
        # Generate the unittest dialog
        self.unittestDialog = UnittestDialog(None, self.debuggerUI.debugServer, self)
        self.unittestDialog.unittestFile.connect(self.viewmanager.setFileLine)
        
        # Generate the find in project files dialog
        self.findFilesDialog = FindFileDialog(self.project)
        self.findFilesDialog.sourceFile.connect(
            self.viewmanager.openSourceFile)
        self.findFilesDialog.designerFile.connect(self.__designer)
        self.replaceFilesDialog = FindFileDialog(self.project, replaceMode = True)
        self.replaceFilesDialog.sourceFile.connect(
            self.viewmanager.openSourceFile)
        self.replaceFilesDialog.designerFile.connect(self.__designer)
        
        # generate the find file dialog
        self.findFileNameDialog = FindFileNameDialog(self.project)
        self.findFileNameDialog.sourceFile.connect(self.viewmanager.openSourceFile)
        self.findFileNameDialog.designerFile.connect(self.__designer)
        
        # generate the diff dialogs
        self.diffDlg = DiffDialog()
        self.compareDlg = CompareDialog()
        
        # create the toolbar manager object
        self.toolbarManager = E5ToolBarManager(self, self)
        self.toolbarManager.setMainWindow(self)
        
        # Initialize the tool groups and list of started tools
        splash.showMessage(self.trUtf8("Initializing Tools..."))
        self.toolGroups, self.currentToolGroup = Preferences.readToolGroups()
        self.toolProcs = []
        self.__initExternalToolsActions()
        
        # create a dummy help window for shortcuts handling
        self.dummyHelpViewer = HelpWindow(None, '.', None, 'help viewer', True, True)
        
        # register all relevant objects
        splash.showMessage(self.trUtf8("Registering Objects..."))
        e5App().registerObject("UserInterface", self)
        e5App().registerObject("DebugUI", self.debuggerUI)
        e5App().registerObject("DebugServer", debugServer)
        e5App().registerObject("ViewManager", self.viewmanager)
        e5App().registerObject("Project", self.project)
        e5App().registerObject("ProjectBrowser", self.projectBrowser)
        e5App().registerObject("MultiProject", self.multiProject)
        e5App().registerObject("TaskViewer", self.taskViewer)
        e5App().registerObject("TemplateViewer", self.templateViewer)
        e5App().registerObject("Shell", self.shell)
        e5App().registerObject("FindFilesDialog", self.findFilesDialog)
        e5App().registerObject("ReplaceFilesDialog", self.replaceFilesDialog)
        e5App().registerObject("DummyHelpViewer", self.dummyHelpViewer)
        e5App().registerObject("PluginManager", self.pluginManager)
        e5App().registerObject("ToolbarManager", self.toolbarManager)
        e5App().registerObject("Terminal", self.terminal)
        e5App().registerObject("Cooperation", self.cooperation)
        e5App().registerObject("Symbols", self.symbolsViewer)
        e5App().registerObject("Numbers", self.numbersViewer)
        
        # Initialize the actions, menus, toolbars and statusbar
        splash.showMessage(self.trUtf8("Initializing Actions..."))
        self.__initActions()
        splash.showMessage(self.trUtf8("Initializing Menus..."))
        self.__initMenus()
        splash.showMessage(self.trUtf8("Initializing Toolbars..."))
        self.__initToolbars()
        splash.showMessage(self.trUtf8("Initializing Statusbar..."))
        self.__initStatusbar()
        
        # Initialise the instance variables.
        self.currentProg = None
        self.isProg = False
        self.utEditorOpen = False
        self.utProjectOpen = False
        
        self.inDragDrop = False
        self.setAcceptDrops(True)
        
        self.currentProfile = None
        
        self.shutdownCalled = False
        self.inCloseEevent = False

        # now redirect stdout and stderr
        # TODO: release - reenable redirection
##        sys.stdout = self.stdout
##        sys.stderr = self.stderr

        # now fire up the single application server
        if Preferences.getUI("SingleApplicationMode"):
            splash.showMessage(self.trUtf8("Initializing Single Application Server..."))
            self.SAServer = E5SingleApplicationServer()
        else:
            self.SAServer = None
        
        # now finalize the plugin manager setup
        self.pluginManager.finalizeSetup()
        # now activate plugins having autoload set to True
        splash.showMessage(self.trUtf8("Activating Plugins..."))
        self.pluginManager.activatePlugins()
        
        # now read the keyboard shortcuts for all the actions
        Shortcuts.readShortcuts()
        
        # restore toolbar manager state
        splash.showMessage(self.trUtf8("Restoring Toolbarmanager..."))
        self.toolbarManager.restoreState(Preferences.getUI("ToolbarManagerState"))
        
        # now activate the initial view profile
        self.__setEditProfile()
        
        # now read the saved tasks
        self.__readTasks()
        
        # now read the saved templates
        self.templateViewer.readTemplates()
        
        # now start the debug client
        debugServer.startClient(False)
        
        # attributes for the network objects
        self.__networkManager = QNetworkAccessManager(self)
        self.__networkManager.proxyAuthenticationRequired.connect(
            proxyAuthenticationRequired)
        self.__networkManager.sslErrors.connect(self.__sslErrors)
        self.__replies = []
        
        # attribute for the help window
        self.helpWindow = None
        
        # list of web addresses serving the versions file
        self.__httpAlternatives = Preferences.getUI("VersionsUrls5")
        self.__inVersionCheck = False
        self.__versionCheckProgress = None
        
        # set spellchecker defaults
        SpellChecker.setDefaultLanguage(
            Preferences.getEditor("SpellCheckingDefaultLanguage"))
        
    def __setStyle(self):
        """
        Private slot to set the style of the interface.
        """
        # step 1: set the style
        style = None
        styleName = Preferences.getUI("Style")
        if styleName != "System" and styleName in list(QStyleFactory.keys()):
            style = QStyleFactory.create(styleName)
        if style is None:
            style = QStyleFactory.create(self.defaultStyleName)
        if style is not None:
            QApplication.setStyle(style)
        
        # step 2: set a style sheet
        styleSheetFile = Preferences.getUI("StyleSheet")
        if styleSheetFile:
            try:
                f = open(styleSheetFile, "r", encoding = "utf-8")
                styleSheet = f.read()
                f.close()
            except IOError as msg:
                E5MessageBox.warning(self,
                    self.trUtf8("Loading Style Sheet"),
                    self.trUtf8("""<p>The Qt Style Sheet file <b>{0}</b> could"""
                                """ not be read.<br>Reason: {1}</p>""")
                        .format(styleSheetFile, str(msg)))
                return
        else:
            styleSheet = ""
        
        e5App().setStyleSheet(styleSheet)
        
    def __createLayout(self, debugServer):
        """
        Private method to create the layout of the various windows.
        
        @param debugServer reference to the debug server object
        """
        # Create the view manager depending on the configuration setting
        logging.debug("Creating Viewmanager...")
        self.viewmanager = \
            ViewManager.factory(self, self, debugServer, self.pluginManager)
        centralWidget = QWidget()
        layout = QVBoxLayout()
        layout.setContentsMargins(1, 1, 1, 1)
        layout.addWidget(self.viewmanager)
        layout.addWidget(self.viewmanager.searchDlg)
        layout.addWidget(self.viewmanager.replaceDlg)
        self.viewmanager.setSizePolicy(QSizePolicy.Preferred, QSizePolicy.Expanding)
        centralWidget.setLayout(layout)
        self.setCentralWidget(centralWidget)
        self.viewmanager.searchDlg.hide()
        self.viewmanager.replaceDlg.hide()
        
        # Create layout with movable dock windows
        if self.layout == "DockWindows":
            logging.debug("Creating dockable windows...")
            self.__createDockWindowsLayout(debugServer)
        
        # Create layout with toolbox windows embedded in dock windows
        elif self.layout == "Toolboxes":
            logging.debug("Creating toolboxes...")
            self.__createToolboxesLayout(debugServer)
        
        # Create layout with sidebar windows embedded in dock windows
        elif self.layout == "Sidebars":
            logging.debug("Creating sidebars...")
            self.__createSidebarsLayout(debugServer)
        
        # Create layout with floating windows
        elif self.layout == "FloatingWindows":
            logging.debug("Creating floating windows...")
            self.__createFloatingWindowsLayout(debugServer)
        
        else:
            raise RuntimeError("wrong layout type given ({0})".format(self.layout))
        logging.debug("Created Layout")

    def __createFloatingWindowsLayout(self, debugServer):
        """
        Private method to create the FloatingWindows layout.
        
        @param debugServer reference to the debug server object
        """
        # Create the project browser
        self.projectBrowser = ProjectBrowser(self.project, None,
            embeddedBrowser=(self.embeddedFileBrowser == 2))
        self.projectBrowser.setWindowTitle(self.trUtf8("Project-Viewer"))

        # Create the multi project browser
        self.multiProjectBrowser = MultiProjectBrowser(self.multiProject)
        self.multiProjectBrowser.setWindowTitle(self.trUtf8("Multiproject-Viewer"))

        # Create the debug viewer maybe without the embedded shell
        self.debugViewer = DebugViewer(debugServer, False, self.viewmanager, None,
            embeddedShell=self.embeddedShell, 
            embeddedBrowser=(self.embeddedFileBrowser == 1))
        self.debugViewer.setWindowTitle(self.trUtf8("Debug-Viewer"))

        # Create the chat part of the user interface
        self.cooperation = ChatWidget()
        self.cooperation.setWindowTitle(self.trUtf8("Cooperation"))
        
        # Create the symbols part of the user interface
        self.symbolsViewer = SymbolsWidget()
        self.symbolsViewer.setWindowTitle(self.trUtf8("Symbols"))
        
        # Create the log viewer part of the user interface
        self.logViewer = LogViewer(None)
        self.logViewer.setWindowTitle(self.trUtf8("Log-Viewer"))

        # Create the task viewer part of the user interface
        self.taskViewer = TaskViewer(None, self.project)
        self.taskViewer.setWindowTitle(self.trUtf8("Task-Viewer"))

        # Create the template viewer part of the user interface
        self.templateViewer = TemplateViewer(None, self.viewmanager)
        self.templateViewer.setWindowTitle(self.trUtf8("Template-Viewer"))
        
        # Create the terminal
        self.terminal = Terminal(self.viewmanager)
        self.terminal.setWindowTitle(self.trUtf8("Terminal"))

        # Create the numbers viewer
        self.numbersViewer = NumbersWidget()
        self.numbersViewer.setWindowTitle(self.trUtf8("Numbers"))
        
        self.windows = [self.projectBrowser, None, self.debugViewer, 
            None, self.logViewer, self.taskViewer, self.templateViewer, 
            self.multiProjectBrowser, self.terminal, self.cooperation, 
            self.symbolsViewer, self.numbersViewer]

        if self.embeddedShell:
            self.shell = self.debugViewer.shell
        else:
            # Create the shell
            self.shell = Shell(debugServer, self.viewmanager, None)
            self.windows[3] = self.shell

        if self.embeddedFileBrowser == 0:   # separate window
            # Create the file browser
            self.browser = Browser(None)
            self.browser.setWindowTitle(self.trUtf8("File-Browser"))
            self.windows[1] = self.browser
        elif self.embeddedFileBrowser == 1: # embedded in debug browser
            self.browser = self.debugViewer.browser
        else:                               # embedded in project browser
            self.browser = self.projectBrowser.fileBrowser

    def __createDockWindowsLayout(self, debugServer):
        """
        Private method to create the DockWindows layout.
        
        @param debugServer reference to the debug server object
        """
        # Create the project browser
        self.projectBrowserDock = self.__createDockWindow("ProjectBrowserDock")
        self.projectBrowser = ProjectBrowser(self.project, self.projectBrowserDock,
            embeddedBrowser=(self.embeddedFileBrowser == 2))
        self.__setupDockWindow(self.projectBrowserDock, Qt.LeftDockWidgetArea,
                             self.projectBrowser, self.trUtf8("Project-Viewer"))

        # Create the multi project browser
        self.multiProjectBrowserDock = \
            self.__createDockWindow("MultiProjectBrowserDock")
        self.multiProjectBrowser = MultiProjectBrowser(self.multiProject)
        self.__setupDockWindow(self.multiProjectBrowserDock, Qt.LeftDockWidgetArea,
                             self.multiProjectBrowser, 
                             self.trUtf8("Multiproject-Viewer"))

        # Create the debug viewer maybe without the embedded shell
        self.debugViewerDock = self.__createDockWindow("DebugViewerDock")
        self.debugViewer = DebugViewer(debugServer, True, self.viewmanager, 
            self.debugViewerDock,
            embeddedShell=self.embeddedShell, 
            embeddedBrowser=(self.embeddedFileBrowser == 1))
        self.__setupDockWindow(self.debugViewerDock, Qt.RightDockWidgetArea,
                             self.debugViewer, self.trUtf8("Debug-Viewer"))

        # Create the chat part of the user interface
        self.cooperationDock = self.__createDockWindow("CooperationDock")
        self.cooperation = ChatWidget(parent = self.cooperationDock)
        self.__setupDockWindow(self.cooperationDock, Qt.RightDockWidgetArea,
                             self.cooperation, self.trUtf8("Cooperation"))
        
        # Create the log viewer part of the user interface
        self.logViewerDock = self.__createDockWindow("LogViewerDock")
        self.logViewer = LogViewer(self.logViewerDock)
        self.__setupDockWindow(self.logViewerDock, Qt.BottomDockWidgetArea,
                             self.logViewer, self.trUtf8("Log-Viewer"))

        # Create the task viewer part of the user interface
        self.taskViewerDock = self.__createDockWindow("TaskViewerDock")
        self.taskViewer = TaskViewer(self.taskViewerDock, self.project)
        self.__setupDockWindow(self.taskViewerDock, Qt.BottomDockWidgetArea,
                             self.taskViewer, self.trUtf8("Task-Viewer"))

        # Create the template viewer part of the user interface
        self.templateViewerDock = self.__createDockWindow("TemplateViewerDock")
        self.templateViewer = TemplateViewer(self.templateViewerDock, 
                                             self.viewmanager)
        self.__setupDockWindow(self.templateViewerDock, Qt.RightDockWidgetArea,
                             self.templateViewer, self.trUtf8("Template-Viewer"))

        # Create the terminal
        self.terminalDock = self.__createDockWindow("TerminalDock")
        self.terminal = Terminal(self.viewmanager, self.terminalDock)
        self.__setupDockWindow(self.terminalDock, Qt.BottomDockWidgetArea,
                             self.terminal, self.trUtf8("Terminal"))
        
        self.windows = [self.projectBrowserDock, None, self.debugViewerDock, 
            None, self.logViewerDock, self.taskViewerDock, self.templateViewerDock, 
            self.multiProjectBrowserDock, self.terminalDock, self.cooperationDock]

        if self.embeddedShell:
            self.shell = self.debugViewer.shell
        else:
            # Create the shell
            self.shellDock = self.__createDockWindow("ShellDock")
            self.shell = Shell(debugServer, self.viewmanager, self.shellDock)
            self.__setupDockWindow(self.shellDock, Qt.BottomDockWidgetArea,
                                 self.shell, self.trUtf8("Shell"))
            self.windows[3] = self.shellDock

        if self.embeddedFileBrowser == 0:   # separate window
            # Create the file browser
            self.browserDock = self.__createDockWindow("BrowserDock")
            self.browser = Browser(self.browserDock)
            self.__setupDockWindow(self.browserDock, Qt.RightDockWidgetArea,
                                 self.browser, self.trUtf8("File-Browser"))
            self.windows[1] = self.browserDock
        elif self.embeddedFileBrowser == 1: # embedded in debug browser
            self.browser = self.debugViewer.browser
        else:                               # embedded in project browser
            self.browser = self.projectBrowser.fileBrowser
        
        # Create the symbols viewer
        self.symbolsDock = self.__createDockWindow("SymbolsDock")
        self.symbolsViewer = SymbolsWidget()
        self.__setupDockWindow(self.symbolsDock, Qt.LeftDockWidgetArea,
                               self.symbolsViewer, self.trUtf8("Symbols"))
        self.windows.append(self.symbolsDock)
        
        # Create the numbers viewer
        self.numbersDock = self.__createDockWindow("NumbersDock")
        self.numbersViewer = NumbersWidget()
        self.__setupDockWindow(self.numbersDock, Qt.BottomDockWidgetArea,
                               self.numbersViewer, self.trUtf8("Numbers"))
        self.windows.append(self.numbersDock)
        
    def __createToolboxesLayout(self, debugServer):
        """
        Private method to create the Toolboxes layout.
        
        @param debugServer reference to the debug server object
        """
        # Create the vertical toolbox
        self.vToolboxDock = self.__createDockWindow("vToolboxDock")
        self.vToolbox = E5VerticalToolBox(self.vToolboxDock)
        self.__setupDockWindow(self.vToolboxDock, Qt.LeftDockWidgetArea, 
                               self.vToolbox, self.trUtf8("Vertical Toolbox"))
        
        # Create the horizontal toolbox
        self.hToolboxDock = self.__createDockWindow("hToolboxDock")
        self.hToolbox = E5HorizontalToolBox(self.hToolboxDock)
        self.__setupDockWindow(self.hToolboxDock, Qt.BottomDockWidgetArea, 
                               self.hToolbox, self.trUtf8("Horizontal Toolbox"))
        
        # Create the project browser
        self.projectBrowser = ProjectBrowser(self.project, None,
            embeddedBrowser=(self.embeddedFileBrowser == 2))
        self.vToolbox.addItem(self.projectBrowser, 
                              UI.PixmapCache.getIcon("projectViewer.png"), 
                              self.trUtf8("Project-Viewer"))

        # Create the multi project browser
        self.multiProjectBrowser = MultiProjectBrowser(self.multiProject)
        self.vToolbox.addItem(self.multiProjectBrowser, 
                              UI.PixmapCache.getIcon("multiProjectViewer.png"), 
                              self.trUtf8("Multiproject-Viewer"))

        # Create the template viewer part of the user interface
        self.templateViewer = TemplateViewer(None, 
                                             self.viewmanager)
        self.vToolbox.addItem(self.templateViewer, 
                              UI.PixmapCache.getIcon("templateViewer.png"), 
                              self.trUtf8("Template-Viewer"))

        # Create the debug viewer maybe without the embedded shell
        self.debugViewerDock = self.__createDockWindow("DebugViewerDock")
        self.debugViewer = DebugViewer(debugServer, True, self.viewmanager, 
            self.debugViewerDock,
            embeddedShell=self.embeddedShell, 
            embeddedBrowser=(self.embeddedFileBrowser == 1))
        self.__setupDockWindow(self.debugViewerDock, Qt.RightDockWidgetArea,
                             self.debugViewer, self.trUtf8("Debug-Viewer"))

        # Create the chat part of the user interface
        self.cooperationDock = self.__createDockWindow("CooperationDock")
        self.cooperation = ChatWidget(parent = self.cooperationDock)
        self.__setupDockWindow(self.cooperationDock, Qt.RightDockWidgetArea,
                             self.cooperation, self.trUtf8("Cooperation"))
        
        # Create the terminal part of the user interface
        self.terminal = Terminal(self.viewmanager)
        self.hToolbox.addItem(self.terminal, 
                              UI.PixmapCache.getIcon("terminal.png"), 
                              self.trUtf8("Terminal"))

        # Create the task viewer part of the user interface
        self.taskViewer = TaskViewer(None, self.project)
        self.hToolbox.addItem(self.taskViewer, 
                              UI.PixmapCache.getIcon("task.png"), 
                              self.trUtf8("Task-Viewer"))

        # Create the log viewer part of the user interface
        self.logViewer = LogViewer()
        self.hToolbox.addItem(self.logViewer, 
                              UI.PixmapCache.getIcon("logViewer.png"), 
                              self.trUtf8("Log-Viewer"))

        self.windows = [None, None, self.debugViewerDock, None, None, 
                        None, None, None, None, self.cooperationDock]

        if self.embeddedShell:
            self.shell = self.debugViewer.shell
        else:
            # Create the shell
            self.shell = Shell(debugServer, self.viewmanager)
            self.hToolbox.insertItem(0, self.shell, 
                                     UI.PixmapCache.getIcon("shell.png"), 
                                     self.trUtf8("Shell"))

        if self.embeddedFileBrowser == 0:   # separate window
            # Create the file browser
            self.browser = Browser()
            self.vToolbox.addItem(self.browser, 
                                  UI.PixmapCache.getIcon("browser.png"), 
                                  self.trUtf8("File-Browser"))
        elif self.embeddedFileBrowser == 1: # embedded in debug browser
            self.browser = self.debugViewer.browser
        else:                               # embedded in project browser
            self.browser = self.projectBrowser.fileBrowser
        
        # Create the symbols viewer
        self.symbolsViewer = SymbolsWidget()
        self.vToolbox.addItem(self.symbolsViewer, 
                              UI.PixmapCache.getIcon("symbols.png"), 
                              self.trUtf8("Symbols"))
        
        # Create the numbers viewer
        self.numbersViewer = NumbersWidget()
        self.hToolbox.addItem(self.numbersViewer, 
                              UI.PixmapCache.getIcon("numbers.png"), 
                              self.trUtf8("Numbers"))
        
        self.hToolbox.setCurrentIndex(0)
        
    def __createSidebarsLayout(self, debugServer):
        """
        Private method to create the Sidebars layout.
        
        @param debugServer reference to the debug server object
        """
        # Create the left sidebar
        self.leftSidebar = E5SideBar(E5SideBar.West)
        
        # Create the bottom sidebar
        self.bottomSidebar = E5SideBar(E5SideBar.South)
        
        # Create the project browser
        logging.debug("Creating Project Browser...")
        self.projectBrowser = ProjectBrowser(self.project, None,
            embeddedBrowser=(self.embeddedFileBrowser == 2))
        self.leftSidebar.addTab(self.projectBrowser, 
                              UI.PixmapCache.getIcon("projectViewer.png"), 
                              self.trUtf8("Project-Viewer"))

        # Create the multi project browser
        logging.debug("Creating Multiproject Browser...")
        self.multiProjectBrowser = MultiProjectBrowser(self.multiProject)
        self.leftSidebar.addTab(self.multiProjectBrowser, 
                              UI.PixmapCache.getIcon("multiProjectViewer.png"), 
                              self.trUtf8("Multiproject-Viewer"))

        # Create the template viewer part of the user interface
        logging.debug("Creating Template Viewer...")
        self.templateViewer = TemplateViewer(None, 
                                             self.viewmanager)
        self.leftSidebar.addTab(self.templateViewer, 
                              UI.PixmapCache.getIcon("templateViewer.png"), 
                              self.trUtf8("Template-Viewer"))

        # Create the debug viewer maybe without the embedded shell
        logging.debug("Creating Debug Viewer...")
        self.debugViewerDock = self.__createDockWindow("DebugViewerDock")
        self.debugViewer = DebugViewer(debugServer, True, self.viewmanager, 
            self.debugViewerDock,
            embeddedShell=self.embeddedShell, 
            embeddedBrowser=(self.embeddedFileBrowser == 1))
        self.__setupDockWindow(self.debugViewerDock, Qt.RightDockWidgetArea,
                             self.debugViewer, self.trUtf8("Debug-Viewer"))

        # Create the chat part of the user interface
        self.cooperationDock = self.__createDockWindow("CooperationDock")
        self.cooperation = ChatWidget(parent = self.cooperationDock)
        self.__setupDockWindow(self.cooperationDock, Qt.RightDockWidgetArea,
                             self.cooperation, self.trUtf8("Cooperation"))
        
        # Create the terminal part of the user interface
        logging.debug("Creating Terminal...")
        self.terminal = Terminal(self.viewmanager)
        self.bottomSidebar.addTab(self.terminal, 
                              UI.PixmapCache.getIcon("terminal.png"), 
                              self.trUtf8("Terminal"))

        # Create the task viewer part of the user interface
        logging.debug("Creating Task Viewer...")
        self.taskViewer = TaskViewer(None, self.project)
        self.bottomSidebar.addTab(self.taskViewer, 
                              UI.PixmapCache.getIcon("task.png"), 
                              self.trUtf8("Task-Viewer"))

        # Create the log viewer part of the user interface
        logging.debug("Creating Log Viewer...")
        self.logViewer = LogViewer()
        self.bottomSidebar.addTab(self.logViewer, 
                              UI.PixmapCache.getIcon("logViewer.png"), 
                              self.trUtf8("Log-Viewer"))

        self.windows = [None, None, self.debugViewerDock, None, None, 
                        None, None, None, None, self.cooperationDock]

        if self.embeddedShell:
            self.shell = self.debugViewer.shell
        else:
            # Create the shell
            logging.debug("Creating Shell...")
            self.shell = Shell(debugServer, self.viewmanager)
            self.bottomSidebar.insertTab(0, self.shell, 
                                     UI.PixmapCache.getIcon("shell.png"), 
                                     self.trUtf8("Shell"))

        if self.embeddedFileBrowser == 0:   # separate window
            # Create the file browser
            logging.debug("Creating File Browser...")
            self.browser = Browser()
            self.leftSidebar.addTab(self.browser, 
                                    UI.PixmapCache.getIcon("browser.png"), 
                                    self.trUtf8("File-Browser"))
        elif self.embeddedFileBrowser == 1: # embedded in debug browser
            self.browser = self.debugViewer.browser
        else:                               # embedded in project browser
            self.browser = self.projectBrowser.fileBrowser
        
        # Create the symbols viewer
        self.symbolsViewer = SymbolsWidget()
        self.leftSidebar.addTab(self.symbolsViewer, 
                                UI.PixmapCache.getIcon("symbols.png"), 
                                self.trUtf8("Symbols"))
        
        # Create the numbers viewer
        self.numbersViewer = NumbersWidget()
        self.bottomSidebar.addTab(self.numbersViewer, 
                                  UI.PixmapCache.getIcon("numbers.png"), 
                                  self.trUtf8("Numbers"))
        
        self.bottomSidebar.setCurrentIndex(0)
        
        # create the central widget
        logging.debug("Creating central widget...")
        cw = self.centralWidget()   # save the current central widget
        self.horizontalSplitter = QSplitter(Qt.Horizontal)
        self.verticalSplitter = QSplitter(Qt.Vertical)
        self.verticalSplitter.addWidget(cw)
        self.verticalSplitter.addWidget(self.bottomSidebar)
        self.horizontalSplitter.addWidget(self.leftSidebar)
        self.horizontalSplitter.addWidget(self.verticalSplitter)
        self.setCentralWidget(self.horizontalSplitter)
        
        self.leftSidebar.setSplitter(self.horizontalSplitter)
        self.bottomSidebar.setSplitter(self.verticalSplitter)
        
    def __configureDockareaCornerUsage(self):
        """
        Private method to configure the usage of the dockarea corners.
        """
        if Preferences.getUI("TopLeftByLeft"):
            self.setCorner(Qt.TopLeftCorner, Qt.LeftDockWidgetArea)
        else:
            self.setCorner(Qt.TopLeftCorner, Qt.TopDockWidgetArea)
        if Preferences.getUI("BottomLeftByLeft"):
            self.setCorner(Qt.BottomLeftCorner, Qt.LeftDockWidgetArea)
        else:
            self.setCorner(Qt.BottomLeftCorner, Qt.BottomDockWidgetArea)
        if Preferences.getUI("TopRightByRight"):
            self.setCorner(Qt.TopRightCorner, Qt.RightDockWidgetArea)
        else:
            self.setCorner(Qt.TopRightCorner, Qt.TopDockWidgetArea)
        if Preferences.getUI("BottomRightByRight"):
            self.setCorner(Qt.BottomRightCorner, Qt.RightDockWidgetArea)
        else:
            self.setCorner(Qt.BottomRightCorner, Qt.BottomDockWidgetArea)
        
    def showLogTab(self, tabname):
        """
        Public method to show a particular Log-Viewer tab.
        
        @param tabname string naming the tab to be shown (string)
        """
        if Preferences.getUI("LogViewerAutoRaise"):
            if self.layout == "DockWindows":
                self.logViewerDock.show()
                self.logViewerDock.raise_()
            elif self.layout == "Toolboxes":
                self.hToolboxDock.show()
                self.hToolbox.setCurrentWidget(self.logViewer)
                self.hToolboxDock.raise_()
            elif self.layout == "Sidebars":
                self.bottomSidebar.show()
                self.bottomSidebar.setCurrentWidget(self.logViewer)
                self.bottomSidebar.raise_()
                if self.bottomSidebar.isAutoHiding():
                    self.bottomSidebar.setFocus()
        
    def __openOnStartup(self, startupType = None):
        """
        Private method to open the last file, project or multiproject.
        
        @param startupType type of startup requested (string, one of
            "Nothing", "File", "Project", "MultiProject" or "Session")
        """
        startupTypeMapping = {
            "Nothing"       : 0, 
            "File"          : 1, 
            "Project"       : 2, 
            "MultiProject"  : 3, 
            "Session"       : 4, 
        }
        
        if startupType is None:
            startup = Preferences.getUI("OpenOnStartup")
        else:
            try:
                startup = startupTypeMapping[startupType]
            except KeyError:
                startup = Preferences.getUI("OpenOnStartup")
        
        if startup == 0:
            # open nothing
            pass
        elif startup == 1:
            # open last file
            recent = self.viewmanager.getMostRecent()
            if recent is not None:
                self.viewmanager.openFiles(recent)
        elif startup == 2:
            # open last project
            recent = self.project.getMostRecent()
            if recent is not None:
                self.project.openProject(recent)
        elif startup == 3:
            # open last multiproject
            recent = self.multiProject.getMostRecent()
            if recent is not None:
                self.multiProject.openMultiProject(recent)
        elif startup == 4:
            # open from session file
            self.__readSession()
        
    def processArgs(self, args):
        """
        Public method to process the command line args passed to the UI.
        
        @param args list of files to open<br />
            The args are processed one at a time. All arguments after a
            '--' option are considered debug arguments to the program 
            for the debugger. All files named before the '--' option
            are opened in a text editor, unless the argument ends in 
            .e4p, then it is opened as a project file. If it ends in 
            .e4m, it is opened as a multiproject.
        """
        # no args, return
        if args is None:
            if not self.__noOpenAtStartup:
                self.__openOnStartup()
            return
        
        opens = 0
        
        # holds space delimited list of command args, if any
        argsStr = None
        # flag indicating '--' options was found
        ddseen = False
        
        if Utilities.isWindowsPlatform():
            argChars = ['-', '/']
        else:
            argChars = ['-']

        for arg in args:
            # handle a request to start with last session
            if arg == '--start-session':
                self.__openOnStartup("Session")
                # ignore all further arguments
                return
            
            if arg == '--' and not ddseen:
                ddseen = True
                continue
            
            if arg[0] in argChars or ddseen:
                if argsStr is None:
                    argsStr = arg
                else:
                    argsStr = "{0} {1}".format(argsStr, arg)
                continue

            ext = os.path.splitext(arg)[1]
            ext = os.path.normcase(ext)

            if ext in ['.e4p']:
                self.project.openProject(arg)
                opens += 1
            elif ext in ['.e4m']:
                self.multiProject.openMultiProject(arg)
                opens += 1
            else:
                self.viewmanager.openFiles(arg)
                opens += 1

        # store away any args we had
        if argsStr is not None:
            self.debuggerUI.setArgvHistory(argsStr)
        
        if opens == 0:
            # no files, project or multiproject was given
            if not self.__noOpenAtStartup:
                self.__openOnStartup()
        
    def __createDockWindow(self, name):
        """
        Private method to create a dock window with common properties.
        
        @param name object name of the new dock window (string)
        @return the generated dock window (QDockWindow)
        """
        dock = QDockWidget()
        dock.setObjectName(name)
        dock.setFeatures(
            QDockWidget.DockWidgetFeatures(QDockWidget.AllDockWidgetFeatures))
        return dock

    def __setupDockWindow(self, dock, where, widget, caption):
        """
        Private method to configure the dock window created with __createDockWindow().
        
        @param dock the dock window (QDockWindow)
        @param where dock area to be docked to (Qt.DockWidgetArea)
        @param widget widget to be shown in the dock window (QWidget)
        @param caption caption of the dock window (string)
        """
        if caption is None:
            caption = ""
        self.addDockWidget(where, dock)
        dock.setWidget(widget)
        dock.setWindowTitle(caption)
        dock.show()

    def __setWindowCaption(self, editor = None, project = None):
        """
        Private method to set the caption of the Main Window.
        
        @param editor filename to be displayed (string)
        @param project project name to be displayed (string)
        """
        if editor is not None and self.captionShowsFilename:
            self.capEditor = \
                Utilities.compactPath(editor, self.maxFilePathLen)
        if project is not None:
            self.capProject = project
        
        if self.passiveMode:
            if not self.capProject and not self.capEditor:
                self.setWindowTitle(self.trUtf8("{0} - Passive Mode").format(Program))
            elif self.capProject and not self.capEditor:
                self.setWindowTitle(self.trUtf8("{0} - {1} - Passive Mode")\
                    .format(self.capProject, Program))
            elif not self.capProject and self.capEditor:
                self.setWindowTitle(self.trUtf8("{0} - {1} - Passive Mode")\
                    .format(self.capEditor, Program))
            else:
                self.setWindowTitle(self.trUtf8("{0} - {1} - {2} - Passive Mode")\
                    .format(self.capProject, self.capEditor, Program))
        else:
            if not self.capProject and not self.capEditor:
                self.setWindowTitle(Program)
            elif self.capProject and not self.capEditor:
                self.setWindowTitle("{0} - {1}".format(self.capProject, Program))
            elif not self.capProject and self.capEditor:
                self.setWindowTitle("{0} - {1}".format(self.capEditor, Program))
            else:
                self.setWindowTitle("{0} - {1} - {2}".format(
                    self.capProject, self.capEditor, Program))
        
    def __initActions(self):
        """
        Private method to define the user interface actions.
        """
        self.actions = []
        self.wizardsActions = []
        
        self.exitAct = E5Action(self.trUtf8('Quit'),
                UI.PixmapCache.getIcon("exit.png"),
                self.trUtf8('&Quit'),
                QKeySequence(self.trUtf8("Ctrl+Q","File|Quit")),
                0, self, 'quit')
        self.exitAct.setStatusTip(self.trUtf8('Quit the IDE'))
        self.exitAct.setWhatsThis(self.trUtf8(
            """<b>Quit the IDE</b>"""
            """<p>This quits the IDE. Any unsaved changes may be saved first."""
            """ Any Python program being debugged will be stopped and the"""
            """ preferences will be written to disc.</p>"""
        ))
        self.exitAct.triggered[()].connect(self.__quit)
        self.actions.append(self.exitAct)

        self.viewProfileActGrp = createActionGroup(self, "viewprofiles", True)
        
        self.setEditProfileAct = E5Action(self.trUtf8('Edit Profile'),
                UI.PixmapCache.getIcon("viewProfileEdit.png"),
                self.trUtf8('Edit Profile'),
                0, 0,
                self.viewProfileActGrp, 'edit_profile', True)
        self.setEditProfileAct.setStatusTip(self.trUtf8('Activate the edit view profile'))
        self.setEditProfileAct.setWhatsThis(self.trUtf8(
            """<b>Edit Profile</b>"""
            """<p>Activate the "Edit View Profile". Windows being shown,"""
            """ if this profile is active, may be configured with the"""
            """ "View Profile Configuration" dialog.</p>"""
        ))
        self.setEditProfileAct.triggered[()].connect(self.__setEditProfile)
        self.actions.append(self.setEditProfileAct)
        
        self.setDebugProfileAct = E5Action(self.trUtf8('Debug Profile'),
                UI.PixmapCache.getIcon("viewProfileDebug.png"),
                self.trUtf8('Debug Profile'),
                0, 0,
                self.viewProfileActGrp, 'debug_profile', True)
        self.setDebugProfileAct.setStatusTip(
            self.trUtf8('Activate the debug view profile'))
        self.setDebugProfileAct.setWhatsThis(self.trUtf8(
            """<b>Debug Profile</b>"""
            """<p>Activate the "Debug View Profile". Windows being shown,"""
            """ if this profile is active, may be configured with the"""
            """ "View Profile Configuration" dialog.</p>"""
        ))
        self.setDebugProfileAct.triggered[()].connect(self.setDebugProfile)
        self.actions.append(self.setDebugProfileAct)
        
        self.pbAct = E5Action(self.trUtf8('Project-Viewer'),
                self.trUtf8('&Project-Viewer'), 0, 0, self, 'project_viewer', True)
        self.pbAct.setStatusTip(self.trUtf8('Toggle the Project-Viewer window'))
        self.pbAct.setWhatsThis(self.trUtf8(
            """<b>Toggle the Project-Viewer window</b>"""
            """<p>If the Project-Viewer window is hidden then display it."""
            """ If it is displayed then close it.</p>"""
        ))
        self.pbAct.triggered[()].connect(self.__toggleProjectBrowser)
        self.actions.append(self.pbAct)
        
        self.pbActivateAct = E5Action(self.trUtf8('Activate Project-Viewer'),
                self.trUtf8('Activate Project-Viewer'),
                QKeySequence(self.trUtf8("Alt+Shift+P")),
                0, self,
                'project_viewer_activate', True)
        self.pbActivateAct.triggered[()].connect(self.__activateProjectBrowser)
        self.actions.append(self.pbActivateAct)
        self.addAction(self.pbActivateAct)

        self.mpbAct = E5Action(self.trUtf8('Multiproject-Viewer'),
                self.trUtf8('&Multiproject-Viewer'), 0, 0, self, 
                'multi_project_viewer', True)
        self.mpbAct.setStatusTip(self.trUtf8('Toggle the Multiproject-Viewer window'))
        self.mpbAct.setWhatsThis(self.trUtf8(
            """<b>Toggle the Multiproject-Viewer window</b>"""
            """<p>If the Multiproject-Viewer window is hidden then display it."""
            """ If it is displayed then close it.</p>"""
        ))
        self.mpbAct.triggered[()].connect(self.__toggleMultiProjectBrowser)
        self.actions.append(self.mpbAct)
        
        self.mpbActivateAct = E5Action(self.trUtf8('Activate Multiproject-Viewer'),
                self.trUtf8('Activate Multiproject-Viewer'),
                QKeySequence(self.trUtf8("Alt+Shift+M")),
                0, self,
                'multi_project_viewer_activate', True)
        self.mpbActivateAct.triggered[()].connect(self.__activateMultiProjectBrowser)
        self.actions.append(self.mpbActivateAct)
        self.addAction(self.mpbActivateAct)

        self.debugViewerAct = E5Action(self.trUtf8('Debug-Viewer'),
                self.trUtf8('&Debug-Viewer'), 0, 0, self, 'debug_viewer', True)
        self.debugViewerAct.setStatusTip(self.trUtf8('Toggle the Debug-Viewer window'))
        self.debugViewerAct.setWhatsThis(self.trUtf8(
            """<b>Toggle the Debug-Viewer window</b>"""
            """<p>If the Debug-Viewer window is hidden then display it."""
            """ If it is displayed then close it.</p>"""
        ))
        self.debugViewerAct.triggered[()].connect(self.__toggleDebugViewer)
        self.actions.append(self.debugViewerAct)
        
        self.debugViewerActivateAct = E5Action(self.trUtf8('Activate Debug-Viewer'),
                self.trUtf8('Activate Debug-Viewer'),
                QKeySequence(self.trUtf8("Alt+Shift+D")),
                0, self,
                'debug_viewer_activate', True)
        self.debugViewerActivateAct.triggered[()].connect(self.__activateDebugViewer)
        self.actions.append(self.debugViewerActivateAct)
        self.addAction(self.debugViewerActivateAct)

        self.shellAct = E5Action(self.trUtf8('Shell'),
                self.trUtf8('&Shell'), 0, 0, self, 'interpreter_shell', True)
        self.shellAct.setStatusTip(self.trUtf8('Toggle the Shell window'))
        self.shellAct.setWhatsThis(self.trUtf8(
            """<b>Toggle the Shell window</b>"""
            """<p>If the Shell window is hidden then display it."""
            """ If it is displayed then close it.</p>"""
        ))
        if not self.embeddedShell:
            self.shellAct.triggered[()].connect(self.__toggleShell)
        self.actions.append(self.shellAct)

        self.shellActivateAct = E5Action(self.trUtf8('Activate Shell'),
                self.trUtf8('Activate Shell'),
                QKeySequence(self.trUtf8("Alt+Shift+S")),
                0, self,
                'interprter_shell_activate', True)
        self.shellActivateAct.triggered[()].connect(self.__activateShell)
        self.actions.append(self.shellActivateAct)
        self.addAction(self.shellActivateAct)

        self.terminalAct = E5Action(self.trUtf8('Terminal'),
                self.trUtf8('Te&rminal'), 0, 0, self, 'terminal', True)
        self.terminalAct.setStatusTip(self.trUtf8('Toggle the Terminal window'))
        self.terminalAct.setWhatsThis(self.trUtf8(
            """<b>Toggle the Terminal window</b>"""
            """<p>If the Terminal window is hidden then display it."""
            """ If it is displayed then close it.</p>"""
        ))
        self.terminalAct.triggered[()].connect(self.__toggleTerminal)
        self.actions.append(self.terminalAct)

        self.terminalActivateAct = E5Action(self.trUtf8('Activate Terminal'),
                self.trUtf8('Activate Terminal'),
                QKeySequence(self.trUtf8("Alt+Shift+R")),
                0, self,
                'terminal_activate', True)
        self.terminalActivateAct.triggered[()].connect(self.__activateTerminal)
        self.actions.append(self.terminalActivateAct)
        self.addAction(self.terminalActivateAct)

        self.browserAct = E5Action(self.trUtf8('File-Browser'),
                self.trUtf8('File-&Browser'), 0, 0, self, 'file_browser', True)
        self.browserAct.setStatusTip(self.trUtf8('Toggle the File-Browser window'))
        self.browserAct.setWhatsThis(self.trUtf8(
            """<b>Toggle the File-Browser window</b>"""
            """<p>If the File-Browser window is hidden then display it."""
            """ If it is displayed then close it.</p>"""
        ))
        if not self.embeddedFileBrowser:
            self.browserAct.triggered[()].connect(self.__toggleBrowser)
        self.actions.append(self.browserAct)

        self.browserActivateAct = E5Action(self.trUtf8('Activate File-Browser'),
                self.trUtf8('Activate File-Browser'),
                QKeySequence(self.trUtf8("Alt+Shift+F")),
                0, self,
                'file_browser_activate', True)
        self.browserActivateAct.triggered[()].connect(self.__activateBrowser)
        self.actions.append(self.browserActivateAct)
        self.addAction(self.browserActivateAct)

        self.logViewerAct = E5Action(self.trUtf8('Log-Viewer'),
                self.trUtf8('&Log-Viewer'), 0, 0, self, 'log_viewer', True)
        self.logViewerAct.setStatusTip(self.trUtf8('Toggle the Log-Viewer window'))
        self.logViewerAct.setWhatsThis(self.trUtf8(
            """<b>Toggle the Log-Viewer window</b>"""
            """<p>If the Log-Viewer window is hidden then display it."""
            """ If it is displayed then close it.</p>"""
        ))
        self.logViewerAct.triggered[()].connect(self.__toggleLogViewer)
        self.actions.append(self.logViewerAct)

        self.logViewerActivateAct = E5Action(self.trUtf8('Activate Log-Viewer'),
                self.trUtf8('Activate Log-Viewer'),
                QKeySequence(self.trUtf8("Alt+Shift+G")),
                0, self,
                'log_viewer_activate', True)
        self.logViewerActivateAct.triggered[()].connect(self.__activateLogViewer)
        self.actions.append(self.logViewerActivateAct)
        self.addAction(self.logViewerActivateAct)

        self.taskViewerAct = E5Action(self.trUtf8('Task-Viewer'),
                self.trUtf8('T&ask-Viewer'), 0, 0, self, 'task_viewer', True)
        self.taskViewerAct.setStatusTip(self.trUtf8('Toggle the Task-Viewer window'))
        self.taskViewerAct.setWhatsThis(self.trUtf8(
            """<b>Toggle the Task-Viewer window</b>"""
            """<p>If the Task-Viewer window is hidden then display it."""
            """ If it is displayed then close it.</p>"""
        ))
        self.taskViewerAct.triggered[()].connect(self.__toggleTaskViewer)
        self.actions.append(self.taskViewerAct)

        self.taskViewerActivateAct = E5Action(self.trUtf8('Activate Task-Viewer'),
                self.trUtf8('Activate Task-Viewer'),
                QKeySequence(self.trUtf8("Alt+Shift+T")),
                0, self,
                'task_viewer_activate',1)
        self.taskViewerActivateAct.triggered[()].connect(self.__activateTaskViewer)
        self.actions.append(self.taskViewerActivateAct)
        self.addAction(self.taskViewerActivateAct)

        self.templateViewerAct = E5Action(self.trUtf8('Template-Viewer'),
                self.trUtf8('Temp&late-Viewer'), 0, 0, self, 'template_viewer', True)
        self.templateViewerAct.setStatusTip(
            self.trUtf8('Toggle the Template-Viewer window'))
        self.templateViewerAct.setWhatsThis(self.trUtf8(
            """<b>Toggle the Template-Viewer window</b>"""
            """<p>If the Template-Viewer window is hidden then display it."""
            """ If it is displayed then close it.</p>"""
        ))
        self.templateViewerAct.triggered[()].connect(self.__toggleTemplateViewer)
        self.actions.append(self.templateViewerAct)

        self.templateViewerActivateAct = E5Action(self.trUtf8('Activate Template-Viewer'),
                self.trUtf8('Activate Template-Viewer'),
                QKeySequence(self.trUtf8("Alt+Shift+A")),
                0, self,
                'template_viewer_activate',1)
        self.templateViewerActivateAct.triggered[()].connect(self.__activateTemplateViewer)
        self.actions.append(self.templateViewerActivateAct)
        self.addAction(self.templateViewerActivateAct)

        self.vtAct = E5Action(self.trUtf8('Vertical Toolbox'),
                self.trUtf8('&Vertical Toolbox'), 0, 0, self, 'vertical_toolbox', True)
        self.vtAct.setStatusTip(self.trUtf8('Toggle the Vertical Toolbox window'))
        self.vtAct.setWhatsThis(self.trUtf8(
            """<b>Toggle the Vertical Toolbox window</b>"""
            """<p>If the Vertical Toolbox window is hidden then display it."""
            """ If it is displayed then close it.</p>"""
        ))
        self.vtAct.triggered[()].connect(self.__toggleVerticalToolbox)
        self.actions.append(self.vtAct)
        
        self.htAct = E5Action(self.trUtf8('Horizontal Toolbox'),
                self.trUtf8('&Horizontal Toolbox'), 0, 0, self, 
                'horizontal_toolbox', True)
        self.htAct.setStatusTip(self.trUtf8('Toggle the Horizontal Toolbox window'))
        self.htAct.setWhatsThis(self.trUtf8(
            """<b>Toggle the Horizontal Toolbox window</b>"""
            """<p>If the Horizontal Toolbox window is hidden then display it."""
            """ If it is displayed then close it.</p>"""
        ))
        self.htAct.triggered[()].connect(self.__toggleHorizontalToolbox)
        self.actions.append(self.htAct)
        
        self.lsbAct = E5Action(self.trUtf8('Left Sidebar'),
                self.trUtf8('&Left Sidebar'), 0, 0, self, 'left_sidebar', True)
        self.lsbAct.setStatusTip(self.trUtf8('Toggle the left sidebar window'))
        self.lsbAct.setWhatsThis(self.trUtf8(
            """<b>Toggle the left sidebar window</b>"""
            """<p>If the left sidebar window is hidden then display it."""
            """ If it is displayed then close it.</p>"""
        ))
        self.lsbAct.triggered[()].connect(self.__toggleLeftSidebar)
        self.actions.append(self.lsbAct)
        
        self.bsbAct = E5Action(self.trUtf8('Bottom Sidebar'),
                self.trUtf8('&Bottom Sidebar'), 0, 0, self, 
                'bottom_sidebar', True)
        self.bsbAct.setStatusTip(self.trUtf8('Toggle the bottom sidebar window'))
        self.bsbAct.setWhatsThis(self.trUtf8(
            """<b>Toggle the bottom sidebar window</b>"""
            """<p>If the bottom sidebar window is hidden then display it."""
            """ If it is displayed then close it.</p>"""
        ))
        self.bsbAct.triggered[()].connect(self.__toggleBottomSidebar)
        self.actions.append(self.bsbAct)
        
        self.cooperationViewerAct = E5Action(self.trUtf8('Cooperation'),
                self.trUtf8('&Cooperation'), 0, 0, self, 'cooperation_viewer', True)
        self.cooperationViewerAct.setStatusTip(self.trUtf8(
            'Toggle the Cooperation window'))
        self.cooperationViewerAct.setWhatsThis(self.trUtf8(
            """<b>Toggle the Cooperation window</b>"""
            """<p>If the Cooperation window is hidden then display it."""
            """ If it is displayed then close it.</p>"""
        ))
        self.cooperationViewerAct.triggered[()].connect(self.__toggleCooperationViewer)
        self.actions.append(self.cooperationViewerAct)
        
        self.cooperationViewerActivateAct = E5Action(
                self.trUtf8('Activate Cooperation-Viewer'),
                self.trUtf8('Activate Cooperation-Viewer'),
                QKeySequence(self.trUtf8("Alt+Shift+O")),
                0, self,
                'cooperation_viewer_activate', True)
        self.cooperationViewerActivateAct.triggered[()].connect(self.__activateCooperationViewer)
        self.actions.append(self.cooperationViewerActivateAct)
        self.addAction(self.cooperationViewerActivateAct)

        self.symbolsViewerAct = E5Action(self.trUtf8('Symbols'),
                self.trUtf8('&Symbols'), 0, 0, self, 'symbols_viewer', True)
        self.symbolsViewerAct.setStatusTip(self.trUtf8(
            'Toggle the Symbols window'))
        self.symbolsViewerAct.setWhatsThis(self.trUtf8(
            """<b>Toggle the Symbols window</b>"""
            """<p>If the Symbols window is hidden then display it."""
            """ If it is displayed then close it.</p>"""
        ))
        self.symbolsViewerAct.triggered[()].connect(self.__toggleSymbolsViewer)
        self.actions.append(self.symbolsViewerAct)
        
        self.symbolsViewerActivateAct = E5Action(
                self.trUtf8('Activate Symbols-Viewer'),
                self.trUtf8('Activate Symbols-Viewer'),
                QKeySequence(self.trUtf8("Alt+Shift+Y")),
                0, self,
                'symbols_viewer_activate', True)
        self.symbolsViewerActivateAct.triggered[()].connect(self.__activateSymbolsViewer)
        self.actions.append(self.symbolsViewerActivateAct)
        self.addAction(self.symbolsViewerActivateAct)

        self.numbersViewerAct = E5Action(self.trUtf8('Numbers'),
                self.trUtf8('&Numbers'), 0, 0, self, 'numbers_viewer', True)
        self.numbersViewerAct.setStatusTip(self.trUtf8(
            'Toggle the Numbers window'))
        self.numbersViewerAct.setWhatsThis(self.trUtf8(
            """<b>Toggle the Numbers window</b>"""
            """<p>If the Numbers window is hidden then display it."""
            """ If it is displayed then close it.</p>"""
        ))
        self.numbersViewerAct.triggered[()].connect(self.__toggleNumbersViewer)
        self.actions.append(self.numbersViewerAct)
        
        self.numbersViewerActivateAct = E5Action(
                self.trUtf8('Activate Numbers-Viewer'),
                self.trUtf8('Activate Numbers-Viewer'),
                QKeySequence(self.trUtf8("Alt+Shift+B")),
                0, self,
                'numbers_viewer_activate', True)
        self.numbersViewerActivateAct.triggered[()].connect(self.__activateNumbersViewer)
        self.actions.append(self.numbersViewerActivateAct)
        self.addAction(self.numbersViewerActivateAct)

        self.whatsThisAct = E5Action(self.trUtf8('What\'s This?'),
                UI.PixmapCache.getIcon("whatsThis.png"),
                self.trUtf8('&What\'s This?'), 
                QKeySequence(self.trUtf8("Shift+F1")),
                0, self, 'whatsThis')
        self.whatsThisAct.setStatusTip(self.trUtf8('Context sensitive help'))
        self.whatsThisAct.setWhatsThis(self.trUtf8(
            """<b>Display context sensitive help</b>"""
            """<p>In What's This? mode, the mouse cursor shows an arrow with a question"""
            """ mark, and you can click on the interface elements to get a short"""
            """ description of what they do and how to use them. In dialogs, this"""
            """ feature can be accessed using the context help button in the"""
            """ titlebar.</p>"""
        ))
        self.whatsThisAct.triggered[()].connect(self.__whatsThis)
        self.actions.append(self.whatsThisAct)

        self.helpviewerAct = E5Action(self.trUtf8('Helpviewer'),
                UI.PixmapCache.getIcon("help.png"),
                self.trUtf8('&Helpviewer...'), 
                QKeySequence(self.trUtf8("F1")),
                0, self, 'helpviewer')
        self.helpviewerAct.setStatusTip(self.trUtf8('Open the helpviewer window'))
        self.helpviewerAct.setWhatsThis(self.trUtf8(
            """<b>Helpviewer</b>"""
            """<p>Display the eric5 web browser. This window will show"""
            """ HTML help files and help from Qt help collections. It has the"""
            """ capability to navigate to links, set bookmarks, print the displayed"""
            """ help and some more features. You may use it to browse the internet"""
            """ as well</p><p>If called with a word selected, this word is search"""
            """ in the Qt help collection.</p>"""
        ))
        self.helpviewerAct.triggered[()].connect(self.__helpViewer)
        self.actions.append(self.helpviewerAct)
        
        self.__initQtDocActions()
        self.__initPythonDocAction()
        self.__initEricDocAction()
        self.__initPySideDocActions()
      
        self.versionAct = E5Action(self.trUtf8('Show Versions'),
                self.trUtf8('Show &Versions'), 0, 0, self, 'show_versions')
        self.versionAct.setStatusTip(self.trUtf8('Display version information'))
        self.versionAct.setWhatsThis(self.trUtf8(
            """<b>Show Versions</b>"""
            """<p>Display version information.</p>"""
                             ))
        self.versionAct.triggered[()].connect(self.__showVersions)
        self.actions.append(self.versionAct)

        self.checkUpdateAct = E5Action(self.trUtf8('Check for Updates'),
                self.trUtf8('Check for &Updates...'), 0, 0, self, 'check_updates')
        self.checkUpdateAct.setStatusTip(self.trUtf8('Check for Updates'))
        self.checkUpdateAct.setWhatsThis(self.trUtf8(
            """<b>Check for Updates...</b>"""
            """<p>Checks the internet for updates of eric5.</p>"""
                             ))
        self.checkUpdateAct.triggered[()].connect(self.performVersionCheck)
        self.actions.append(self.checkUpdateAct)
    
        self.showVersionsAct = E5Action(self.trUtf8('Show downloadable versions'),
                self.trUtf8('Show &downloadable versions...'), 
                0, 0, self, 'show_downloadable_versions')
        self.showVersionsAct.setStatusTip(
            self.trUtf8('Show the versions available for download'))
        self.showVersionsAct.setWhatsThis(self.trUtf8(
            """<b>Show downloadable versions...</b>"""
            """<p>Shows the eric5 versions available for download """
            """from the internet.</p>"""
                             ))
        self.showVersionsAct.triggered[()].connect(self.showAvailableVersionsInfo)
        self.actions.append(self.showVersionsAct)

        self.reportBugAct = E5Action(self.trUtf8('Report Bug'),
                self.trUtf8('Report &Bug...'), 0, 0, self, 'report_bug')
        self.reportBugAct.setStatusTip(self.trUtf8('Report a bug'))
        self.reportBugAct.setWhatsThis(self.trUtf8(
            """<b>Report Bug...</b>"""
            """<p>Opens a dialog to report a bug.</p>"""
                             ))
        self.reportBugAct.triggered[()].connect(self.__reportBug)
        self.actions.append(self.reportBugAct)
        
        self.requestFeatureAct = E5Action(self.trUtf8('Request Feature'),
                self.trUtf8('Request &Feature...'), 0, 0, self, 'request_feature')
        self.requestFeatureAct.setStatusTip(self.trUtf8('Send a feature request'))
        self.requestFeatureAct.setWhatsThis(self.trUtf8(
            """<b>Request Feature...</b>"""
            """<p>Opens a dialog to send a feature request.</p>"""
                             ))
        self.requestFeatureAct.triggered[()].connect(self.__requestFeature)
        self.actions.append(self.requestFeatureAct)

        self.utActGrp = createActionGroup(self)
        
        self.utDialogAct = E5Action(self.trUtf8('Unittest'), 
                UI.PixmapCache.getIcon("unittest.png"),
                self.trUtf8('&Unittest...'),
                0, 0, self.utActGrp, 'unittest')
        self.utDialogAct.setStatusTip(self.trUtf8('Start unittest dialog'))
        self.utDialogAct.setWhatsThis(self.trUtf8(
            """<b>Unittest</b>"""
            """<p>Perform unit tests. The dialog gives you the"""
            """ ability to select and run a unittest suite.</p>"""
        ))
        self.utDialogAct.triggered[()].connect(self.__unittest)
        self.actions.append(self.utDialogAct)

        self.utRestartAct = E5Action(self.trUtf8('Unittest Restart'),
            UI.PixmapCache.getIcon("unittestRestart.png"),
            self.trUtf8('&Restart Unittest...'),
            0, 0, self.utActGrp, 'unittest_restart')
        self.utRestartAct.setStatusTip(self.trUtf8('Restart last unittest'))
        self.utRestartAct.setWhatsThis(self.trUtf8(
            """<b>Restart Unittest</b>"""
            """<p>Restart the unittest performed last.</p>"""
        ))
        self.utRestartAct.triggered[()].connect(self.__unittestRestart)
        self.utRestartAct.setEnabled(False)
        self.actions.append(self.utRestartAct)
        
        self.utScriptAct = E5Action(self.trUtf8('Unittest Script'),
            UI.PixmapCache.getIcon("unittestScript.png"),
            self.trUtf8('Unittest &Script...'),
            0, 0, self.utActGrp, 'unittest_script')
        self.utScriptAct.setStatusTip(self.trUtf8('Run unittest with current script'))
        self.utScriptAct.setWhatsThis(self.trUtf8(
            """<b>Unittest Script</b>"""
            """<p>Run unittest with current script.</p>"""
        ))
        self.utScriptAct.triggered[()].connect(self.__unittestScript)
        self.utScriptAct.setEnabled(False)
        self.actions.append(self.utScriptAct)
        
        self.utProjectAct = E5Action(self.trUtf8('Unittest Project'),
            UI.PixmapCache.getIcon("unittestProject.png"),
            self.trUtf8('Unittest &Project...'),
            0, 0, self.utActGrp, 'unittest_project')
        self.utProjectAct.setStatusTip(self.trUtf8('Run unittest with current project'))
        self.utProjectAct.setWhatsThis(self.trUtf8(
            """<b>Unittest Project</b>"""
            """<p>Run unittest with current project.</p>"""
        ))
        self.utProjectAct.triggered[()].connect(self.__unittestProject)
        self.utProjectAct.setEnabled(False)
        self.actions.append(self.utProjectAct)
        
        # check for Qt4 designer and linguist
        designerExe = Utilities.isWindowsPlatform() and \
            "{0}.exe".format(Utilities.generateQtToolName("designer")) or \
            Utilities.generateQtToolName("designer")
        if Utilities.isinpath(designerExe):
            self.designer4Act = E5Action(self.trUtf8('Qt-Designer 4'), 
                    UI.PixmapCache.getIcon("designer4.png"),
                    self.trUtf8('&Designer 4...'), 0, 0, self, 'qt_designer4')
            self.designer4Act.setStatusTip(self.trUtf8('Start Qt-Designer 4'))
            self.designer4Act.setWhatsThis(self.trUtf8(
                """<b>Qt-Designer 4</b>"""
                """<p>Start Qt-Designer 4.</p>"""
            ))
            self.designer4Act.triggered[()].connect(self.__designer4)
            self.actions.append(self.designer4Act)
        else:
            self.designer4Act = None
        
        linguistExe = Utilities.isWindowsPlatform() and \
            "{0}.exe".format(Utilities.generateQtToolName("linguist")) or \
            Utilities.generateQtToolName("linguist")
        if Utilities.isinpath(linguistExe):
            self.linguist4Act = E5Action(self.trUtf8('Qt-Linguist 4'), 
                    UI.PixmapCache.getIcon("linguist4.png"),
                    self.trUtf8('&Linguist 4...'), 0, 0, self, 'qt_linguist4')
            self.linguist4Act.setStatusTip(self.trUtf8('Start Qt-Linguist 4'))
            self.linguist4Act.setWhatsThis(self.trUtf8(
                """<b>Qt-Linguist 4</b>"""
                """<p>Start Qt-Linguist 4.</p>"""
            ))
            self.linguist4Act.triggered[()].connect(self.__linguist4)
            self.actions.append(self.linguist4Act)
        else:
            self.linguist4Act = None
    
        self.uipreviewerAct = E5Action(self.trUtf8('UI Previewer'), 
                UI.PixmapCache.getIcon("uiPreviewer.png"),
                self.trUtf8('&UI Previewer...'), 0, 0, self, 'ui_previewer')
        self.uipreviewerAct.setStatusTip(self.trUtf8('Start the UI Previewer'))
        self.uipreviewerAct.setWhatsThis(self.trUtf8(
            """<b>UI Previewer</b>"""
            """<p>Start the UI Previewer.</p>"""
        ))
        self.uipreviewerAct.triggered[()].connect(self.__UIPreviewer)
        self.actions.append(self.uipreviewerAct)
        
        self.trpreviewerAct = E5Action(self.trUtf8('Translations Previewer'), 
                UI.PixmapCache.getIcon("trPreviewer.png"),
                self.trUtf8('&Translations Previewer...'), 0, 0, self, 'tr_previewer')
        self.trpreviewerAct.setStatusTip(self.trUtf8('Start the Translations Previewer'))
        self.trpreviewerAct.setWhatsThis(self.trUtf8(
            """<b>Translations Previewer</b>"""
            """<p>Start the Translations Previewer.</p>"""
        ))
        self.trpreviewerAct.triggered[()].connect(self.__TRPreviewer)
        self.actions.append(self.trpreviewerAct)
        
        self.diffAct = E5Action(self.trUtf8('Compare Files'),
                UI.PixmapCache.getIcon("diffFiles.png"),
                self.trUtf8('&Compare Files...'), 0, 0, self, 'diff_files')
        self.diffAct.setStatusTip(self.trUtf8('Compare two files'))
        self.diffAct.setWhatsThis(self.trUtf8(
            """<b>Compare Files</b>"""
            """<p>Open a dialog to compare two files.</p>"""
        ))
        self.diffAct.triggered[()].connect(self.__compareFiles)
        self.actions.append(self.diffAct)

        self.compareAct = E5Action(self.trUtf8('Compare Files side by side'),
                UI.PixmapCache.getIcon("compareFiles.png"),
                self.trUtf8('Compare Files &side by side...'), 
                0, 0, self, 'compare_files')
        self.compareAct.setStatusTip(self.trUtf8('Compare two files'))
        self.compareAct.setWhatsThis(self.trUtf8(
            """<b>Compare Files side by side</b>"""
            """<p>Open a dialog to compare two files and show the result"""
            """ side by side.</p>"""
        ))
        self.compareAct.triggered[()].connect(self.__compareFilesSbs)
        self.actions.append(self.compareAct)

        self.sqlBrowserAct = E5Action(self.trUtf8('SQL Browser'),
                UI.PixmapCache.getIcon("sqlBrowser.png"),
                self.trUtf8('SQL &Browser...'), 
                0, 0, self, 'sql_browser')
        self.sqlBrowserAct.setStatusTip(self.trUtf8('Browse a SQL database'))
        self.sqlBrowserAct.setWhatsThis(self.trUtf8(
            """<b>SQL Browser</b>"""
            """<p>Browse a SQL database.</p>"""
        ))
        self.sqlBrowserAct.triggered[()].connect(self.__sqlBrowser)
        self.actions.append(self.sqlBrowserAct)

        self.miniEditorAct = E5Action(self.trUtf8('Mini Editor'),
                UI.PixmapCache.getIcon("editor.png"),
                self.trUtf8('Mini &Editor...'), 
                0, 0, self, 'mini_editor')
        self.miniEditorAct.setStatusTip(self.trUtf8('Mini Editor'))
        self.miniEditorAct.setWhatsThis(self.trUtf8(
            """<b>Mini Editor</b>"""
            """<p>Open a dialog with a simplified editor.</p>"""
        ))
        self.miniEditorAct.triggered[()].connect(self.__openMiniEditor)
        self.actions.append(self.miniEditorAct)

        self.webBrowserAct = E5Action(self.trUtf8('Web Browser'),
                UI.PixmapCache.getIcon("ericWeb.png"),
                self.trUtf8('&Web Browser...'), 
                0, 0, self, 'web_browser')
        self.webBrowserAct.setStatusTip(self.trUtf8('Start the eric5 Web Browser'))
        self.webBrowserAct.setWhatsThis(self.trUtf8(
            """<b>Web Browser</b>"""
            """<p>Browse the Internet with the eric5 Web Browser.</p>"""
        ))
        self.webBrowserAct.triggered[()].connect(self.__startWebBrowser)
        self.actions.append(self.webBrowserAct)

        self.iconEditorAct = E5Action(self.trUtf8('Icon Editor'),
                UI.PixmapCache.getIcon("iconEditor.png"),
                self.trUtf8('&Icon Editor...'), 
                0, 0, self, 'icon_editor')
        self.iconEditorAct.setStatusTip(self.trUtf8('Start the eric5 Icon Editor'))
        self.iconEditorAct.setWhatsThis(self.trUtf8(
            """<b>Icon Editor</b>"""
            """<p>Starts the eric5 Icon Editor for editing simple icons.</p>"""
        ))
        self.iconEditorAct.triggered[()].connect(self.__editPixmap)
        self.actions.append(self.iconEditorAct)

        self.prefAct = E5Action(self.trUtf8('Preferences'),
                UI.PixmapCache.getIcon("configure.png"),
                self.trUtf8('&Preferences...'), 0, 0, self, 'preferences')
        self.prefAct.setStatusTip(self.trUtf8('Set the prefered configuration'))
        self.prefAct.setWhatsThis(self.trUtf8(
            """<b>Preferences</b>"""
            """<p>Set the configuration items of the application"""
            """ with your prefered values.</p>"""
        ))
        self.prefAct.triggered[()].connect(self.showPreferences)
        self.actions.append(self.prefAct)

        self.prefExportAct = E5Action(self.trUtf8('Export Preferences'),
                UI.PixmapCache.getIcon("configureExport.png"),
                self.trUtf8('E&xport Preferences...'), 0, 0, self, 'export_preferences')
        self.prefExportAct.setStatusTip(self.trUtf8('Export the current configuration'))
        self.prefExportAct.setWhatsThis(self.trUtf8(
            """<b>Export Preferences</b>"""
            """<p>Export the current configuration to a file.</p>"""
        ))
        self.prefExportAct.triggered[()].connect(self.__exportPreferences)
        self.actions.append(self.prefExportAct)

        self.prefImportAct = E5Action(self.trUtf8('Import Preferences'),
                UI.PixmapCache.getIcon("configureImport.png"),
                self.trUtf8('I&mport Preferences...'), 0, 0, self, 'import_preferences')
        self.prefImportAct.setStatusTip(self.trUtf8(
            'Import a previously exported configuration'))
        self.prefImportAct.setWhatsThis(self.trUtf8(
            """<b>Import Preferences</b>"""
            """<p>Import a previously exported configuration.</p>"""
        ))
        self.prefImportAct.triggered[()].connect(self.__importPreferences)
        self.actions.append(self.prefImportAct)

        self.reloadAPIsAct = E5Action(self.trUtf8('Reload APIs'),
                self.trUtf8('Reload &APIs'), 0, 0, self, 'reload_apis')
        self.reloadAPIsAct.setStatusTip(self.trUtf8('Reload the API information'))
        self.reloadAPIsAct.setWhatsThis(self.trUtf8(
            """<b>Reload APIs</b>"""
            """<p>Reload the API information.</p>"""
        ))
        self.reloadAPIsAct.triggered[()].connect(self.__reloadAPIs)
        self.actions.append(self.reloadAPIsAct)

        self.showExternalToolsAct = E5Action(self.trUtf8('Show external tools'),
                UI.PixmapCache.getIcon("showPrograms.png"),
                self.trUtf8('Show external &tools'), 0, 0, self, 'show_external_tools')
        self.showExternalToolsAct.setStatusTip(self.trUtf8('Show external tools'))
        self.showExternalToolsAct.setWhatsThis(self.trUtf8(
            """<b>Show external tools</b>"""
            """<p>Opens a dialog to show the path and versions of all"""
            """ extenal tools used by eric5.</p>"""
        ))
        self.showExternalToolsAct.triggered[()].connect(self.__showExternalTools)
        self.actions.append(self.showExternalToolsAct)

        self.configViewProfilesAct = E5Action(self.trUtf8('View Profiles'),
                UI.PixmapCache.getIcon("configureViewProfiles.png"),
                self.trUtf8('&View Profiles...'), 0, 0, self, 'view_profiles')
        self.configViewProfilesAct.setStatusTip(self.trUtf8('Configure view profiles'))
        self.configViewProfilesAct.setWhatsThis(self.trUtf8(
            """<b>View Profiles</b>"""
            """<p>Configure the view profiles. With this dialog you may"""
            """ set the visibility of the various windows for the predetermined"""
            """ view profiles.</p>"""
        ))
        self.configViewProfilesAct.triggered[()].connect(self.__configViewProfiles)
        self.actions.append(self.configViewProfilesAct)

        self.configToolBarsAct = E5Action(self.trUtf8('Toolbars'),
                UI.PixmapCache.getIcon("toolbarsConfigure.png"),
                self.trUtf8('Tool&bars...'), 0, 0, self, 'configure_toolbars')
        self.configToolBarsAct.setStatusTip(self.trUtf8('Configure toolbars'))
        self.configToolBarsAct.setWhatsThis(self.trUtf8(
            """<b>Toolbars</b>"""
            """<p>Configure the toolbars. With this dialog you may"""
            """ change the actions shown on the various toolbars and"""
            """ define your own toolbars.</p>"""
        ))
        self.configToolBarsAct.triggered[()].connect(self.__configToolBars)
        self.actions.append(self.configToolBarsAct)

        self.shortcutsAct = E5Action(self.trUtf8('Keyboard Shortcuts'),
                UI.PixmapCache.getIcon("configureShortcuts.png"),
                self.trUtf8('Keyboard &Shortcuts...'), 0, 0, self, 'keyboard_shortcuts')
        self.shortcutsAct.setStatusTip(self.trUtf8('Set the keyboard shortcuts'))
        self.shortcutsAct.setWhatsThis(self.trUtf8(
            """<b>Keyboard Shortcuts</b>"""
            """<p>Set the keyboard shortcuts of the application"""
            """ with your prefered values.</p>"""
        ))
        self.shortcutsAct.triggered[()].connect(self.__configShortcuts)
        self.actions.append(self.shortcutsAct)

        self.exportShortcutsAct = E5Action(self.trUtf8('Export Keyboard Shortcuts'),
                UI.PixmapCache.getIcon("exportShortcuts.png"),
                self.trUtf8('&Export Keyboard Shortcuts...'), 0, 0, self,
                'export_keyboard_shortcuts')
        self.exportShortcutsAct.setStatusTip(self.trUtf8('Export the keyboard shortcuts'))
        self.exportShortcutsAct.setWhatsThis(self.trUtf8(
            """<b>Export Keyboard Shortcuts</b>"""
            """<p>Export the keyboard shortcuts of the application.</p>"""
        ))
        self.exportShortcutsAct.triggered[()].connect(self.__exportShortcuts)
        self.actions.append(self.exportShortcutsAct)

        self.importShortcutsAct = E5Action(self.trUtf8('Import Keyboard Shortcuts'),
                UI.PixmapCache.getIcon("importShortcuts.png"),
                self.trUtf8('&Import Keyboard Shortcuts...'), 0, 0, self,
                'import_keyboard_shortcuts')
        self.importShortcutsAct.setStatusTip(self.trUtf8('Import the keyboard shortcuts'))
        self.importShortcutsAct.setWhatsThis(self.trUtf8(
            """<b>Import Keyboard Shortcuts</b>"""
            """<p>Import the keyboard shortcuts of the application.</p>"""
        ))
        self.importShortcutsAct.triggered[()].connect(self.__importShortcuts)
        self.actions.append(self.importShortcutsAct)

        self.viewmanagerActivateAct = E5Action(self.trUtf8('Activate current editor'),
                self.trUtf8('Activate current editor'),
                QKeySequence(self.trUtf8("Alt+Shift+E")),
                0, self,
                'viewmanager_activate',1)
        self.viewmanagerActivateAct.triggered[()].connect(self.__activateViewmanager)
        self.actions.append(self.viewmanagerActivateAct)
        self.addAction(self.viewmanagerActivateAct)

        self.nextTabAct = E5Action(self.trUtf8('Show next'), 
                      self.trUtf8('Show next'), 
                      QKeySequence(self.trUtf8('Ctrl+Alt+Tab')), 0,
                      self, 'view_next_tab')
        self.nextTabAct.triggered[()].connect(self.__showNext)
        self.actions.append(self.nextTabAct)
        self.addAction(self.nextTabAct)
        
        self.prevTabAct = E5Action(self.trUtf8('Show previous'), 
                      self.trUtf8('Show previous'), 
                      QKeySequence(self.trUtf8('Shift+Ctrl+Alt+Tab')), 0,
                      self, 'view_previous_tab')
        self.prevTabAct.triggered[()].connect(self.__showPrevious)
        self.actions.append(self.prevTabAct)
        self.addAction(self.prevTabAct)
        
        self.switchTabAct = E5Action(self.trUtf8('Switch between tabs'), 
                      self.trUtf8('Switch between tabs'), 
                      QKeySequence(self.trUtf8('Ctrl+1')), 0,
                      self, 'switch_tabs')
        self.switchTabAct.triggered[()].connect(self.__switchTab)
        self.actions.append(self.switchTabAct)
        self.addAction(self.switchTabAct)
        
        self.pluginInfoAct = E5Action(self.trUtf8('Plugin Infos'),
                UI.PixmapCache.getIcon("plugin.png"),
                self.trUtf8('&Plugin Infos...'), 0, 0, self, 'plugin_infos')
        self.pluginInfoAct.setStatusTip(self.trUtf8('Show Plugin Infos'))
        self.pluginInfoAct.setWhatsThis(self.trUtf8(
            """<b>Plugin Infos...</b>"""
            """<p>This opens a dialog, that show some information about"""
            """ loaded plugins.</p>"""
        ))
        self.pluginInfoAct.triggered[()].connect(self.__showPluginInfo)
        self.actions.append(self.pluginInfoAct)
        
        self.pluginInstallAct = E5Action(self.trUtf8('Install Plugins'),
                UI.PixmapCache.getIcon("pluginInstall.png"),
                self.trUtf8('&Install Plugins...'), 0, 0, self, 'plugin_install')
        self.pluginInstallAct.setStatusTip(self.trUtf8('Install Plugins'))
        self.pluginInstallAct.setWhatsThis(self.trUtf8(
            """<b>Install Plugins...</b>"""
            """<p>This opens a dialog to install or update plugins.</p>"""
        ))
        self.pluginInstallAct.triggered[()].connect(self.__installPlugins)
        self.actions.append(self.pluginInstallAct)
        
        self.pluginDeinstallAct = E5Action(self.trUtf8('Uninstall Plugin'),
                UI.PixmapCache.getIcon("pluginUninstall.png"),
                self.trUtf8('&Uninstall Plugin...'), 0, 0, self, 'plugin_deinstall')
        self.pluginDeinstallAct.setStatusTip(self.trUtf8('Uninstall Plugin'))
        self.pluginDeinstallAct.setWhatsThis(self.trUtf8(
            """<b>Uninstall Plugin...</b>"""
            """<p>This opens a dialog to uninstall a plugin.</p>"""
        ))
        self.pluginDeinstallAct.triggered[()].connect(self.__deinstallPlugin)
        self.actions.append(self.pluginDeinstallAct)

        self.pluginRepoAct = E5Action(self.trUtf8('Plugin Repository'),
                UI.PixmapCache.getIcon("pluginRepository.png"),
                self.trUtf8('Plugin &Repository...'), 0, 0, self, 'plugin_repository')
        self.pluginRepoAct.setStatusTip(self.trUtf8(
            'Show Plugins available for download'))
        self.pluginRepoAct.setWhatsThis(self.trUtf8(
            """<b>Plugin Repository...</b>"""
            """<p>This opens a dialog, that shows a list of plugins """
            """available on the Internet.</p>"""
        ))
        self.pluginRepoAct.triggered[()].connect(self.__showPluginsAvailable)
        self.actions.append(self.pluginRepoAct)
        
        # initialize viewmanager actions
        self.viewmanager.initActions()
        
        # initialize debugger actions
        self.debuggerUI.initActions()
        
        # initialize project actions
        self.project.initActions()
        
        # initialize multi project actions
        self.multiProject.initActions()
    
    def __initQtDocActions(self):
        """
        Private slot to initilize the action to show the Qt documentation.
        """
        self.qt4DocAct = E5Action(self.trUtf8('Qt4 Documentation'),
                self.trUtf8('Qt&4 Documentation'), 0, 0, self, 'qt4_documentation')
        self.qt4DocAct.setStatusTip(self.trUtf8('Open Qt4 Documentation'))
        self.qt4DocAct.setWhatsThis(self.trUtf8(
            """<b>Qt4 Documentation</b>"""
            """<p>Display the Qt4 Documentation. Dependant upon your settings, this"""
            """ will either show the help in Eric's internal help viewer, or execute"""
            """ a web browser or Qt Assistant. </p>"""
        ))
        self.qt4DocAct.triggered[()].connect(self.__showQt4Doc)
        self.actions.append(self.qt4DocAct)
      
        self.pyqt4DocAct = E5Action(self.trUtf8('PyQt4 Documentation'),
                self.trUtf8('P&yQt4 Documentation'), 0, 0, self, 'pyqt4_documentation')
        self.pyqt4DocAct.setStatusTip(self.trUtf8('Open PyQt4 Documentation'))
        self.pyqt4DocAct.setWhatsThis(self.trUtf8(
            """<b>PyQt4 Documentation</b>"""
            """<p>Display the PyQt4 Documentation. Dependant upon your settings, this"""
            """ will either show the help in Eric's internal help viewer, or execute"""
            """ a web browser or Qt Assistant. </p>"""
        ))
        self.pyqt4DocAct.triggered[()].connect(self.__showPyQt4Doc)
        self.actions.append(self.pyqt4DocAct)
        
    def __initPythonDocAction(self):
        """
        Private slot to initilize the action to show the Python documentation.
        """
        self.pythonDocAct = E5Action(self.trUtf8('Python Documentation'),
            self.trUtf8('&Python Documentation'), 0, 0, self, 'python_documentation')
        self.pythonDocAct.setStatusTip(self.trUtf8('Open Python Documentation'))
        self.pythonDocAct.setWhatsThis(self.trUtf8(
                """<b>Python Documentation</b>"""
                """<p>Display the python documentation."""
                """ If no documentation directory is configured,"""
                """ the location of the python documentation is assumed to be the doc"""
                """ directory underneath the location of the python executable on"""
                """ Windows and <i>/usr/share/doc/packages/python/html</i> on Unix."""
                """ Set PYTHONDOCDIR in your environment to override this. </p>"""
        ))
        self.pythonDocAct.triggered[()].connect(self.__showPythonDoc)
        self.actions.append(self.pythonDocAct)
        
    def __initEricDocAction(self):
        """
        Private slot to initialize the action to show the eric5 documentation.
        """
        self.ericDocAct = E5Action(self.trUtf8("Eric API Documentation"),
            self.trUtf8('&Eric API Documentation'), 0, 0, self, 'eric_documentation')
        self.ericDocAct.setStatusTip(self.trUtf8("Open Eric API Documentation"))
        self.ericDocAct.setWhatsThis(self.trUtf8(
            """<b>Eric API Documentation</b>"""
            """<p>Display the Eric API documentation."""
            """ The location for the documentation is the Documentation/Source"""
            """ subdirectory of the eric5 installation directory.</p>"""
        ))
        self.ericDocAct.triggered[()].connect(self.__showEricDoc)
        self.actions.append(self.ericDocAct)
        
    def __initPySideDocActions(self):
        """
        Private slot to initilize the action to show the PySide documentation.
        """
        try:
            import PySide
            self.pysideDocAct = E5Action(self.trUtf8('PySide Documentation'),
                self.trUtf8('Py&Side Documentation'), 0, 0, self, 'pyside_documentation')
            self.pysideDocAct.setStatusTip(self.trUtf8('Open PySide Documentation'))
            self.pysideDocAct.setWhatsThis(self.trUtf8(
                """<b>PySide Documentation</b>"""
                """<p>Display the PySide Documentation. Dependant upon your settings, """
                """this will either show the help in Eric's internal help viewer, or """
                """execute a web browser or Qt Assistant. </p>"""
            ))
            self.pysideDocAct.triggered[()].connect(self.__showPySideDoc)
            self.actions.append(self.pysideDocAct)
            del PySide
        except ImportError:
            self.pysideDocAct = None
      
    def __initMenus(self):
        """
        Private slot to create the menus.
        """
        self.__menus = {}
        mb = self.menuBar()
        
        self.__menus["file"] = self.viewmanager.initFileMenu()
        mb.addMenu(self.__menus["file"])
        self.__menus["file"].addSeparator()
        self.__menus["file"].addAction(self.exitAct)
        self.__menus["file"].aboutToShow.connect(self.__showFileMenu)
        
        self.__menus["edit"] = self.viewmanager.initEditMenu()
        mb.addMenu(self.__menus["edit"])
        
        self.__menus["view"] = self.viewmanager.initViewMenu()
        mb.addMenu(self.__menus["view"])
        
        self.__menus["start"], self.__menus["debug"] = self.debuggerUI.initMenus()
        mb.addMenu(self.__menus["start"])
        mb.addMenu(self.__menus["debug"])
        
        self.__menus["unittest"] = QMenu(self.trUtf8('&Unittest'), self)
        self.__menus["unittest"].setTearOffEnabled(True)
        mb.addMenu(self.__menus["unittest"])
        self.__menus["unittest"].addAction(self.utDialogAct)
        self.__menus["unittest"].addSeparator()
        self.__menus["unittest"].addAction(self.utRestartAct)
        self.__menus["unittest"].addAction(self.utScriptAct)
        self.__menus["unittest"].addAction(self.utProjectAct)
        
        self.__menus["multiproject"] = self.multiProject.initMenu()
        mb.addMenu(self.__menus["multiproject"])
        
        self.__menus["project"] = self.project.initMenu()
        mb.addMenu(self.__menus["project"])
        
        self.__menus["extras"] = QMenu(self.trUtf8('E&xtras'), self)
        self.__menus["extras"].setTearOffEnabled(True)
        self.__menus["extras"].aboutToShow.connect(self.__showExtrasMenu)
        mb.addMenu(self.__menus["extras"])
        self.viewmanager.addToExtrasMenu(self.__menus["extras"])
        self.__menus["wizards"] = QMenu(self.trUtf8('Wi&zards'), self)
        self.__menus["wizards"].setTearOffEnabled(True)
        self.__menus["wizards"].aboutToShow.connect(self.__showWizardsMenu)
        self.wizardsMenuAct = self.__menus["extras"].addMenu(self.__menus["wizards"])
        self.wizardsMenuAct.setEnabled(False)
        self.__menus["macros"] = self.viewmanager.initMacroMenu()
        self.__menus["extras"].addMenu(self.__menus["macros"])
        self.__menus["tools"] = QMenu(self.trUtf8('&Tools'), self)
        self.__menus["tools"].aboutToShow.connect(self.__showToolsMenu)
        self.__menus["tools"].triggered.connect(self.__toolExecute)
        self.toolGroupsMenu = QMenu(self.trUtf8("Select Tool Group"), self)
        self.toolGroupsMenu.aboutToShow.connect(self.__showToolGroupsMenu)
        self.toolGroupsMenu.triggered.connect(self.__toolGroupSelected)
        self.toolGroupsMenuTriggered = False
        self.__menus["extras"].addMenu(self.__menus["tools"])
        
        self.__menus["settings"] = QMenu(self.trUtf8('Se&ttings'), self)
        mb.addMenu(self.__menus["settings"])
        self.__menus["settings"].setTearOffEnabled(True)
        self.__menus["settings"].addAction(self.prefAct)
        self.__menus["settings"].addAction(self.prefExportAct)
        self.__menus["settings"].addAction(self.prefImportAct)
        self.__menus["settings"].addSeparator()
        self.__menus["settings"].addAction(self.reloadAPIsAct)
        self.__menus["settings"].addSeparator()
        self.__menus["settings"].addAction(self.configViewProfilesAct)
        self.__menus["settings"].addAction(self.configToolBarsAct)
        self.__menus["settings"].addSeparator()
        self.__menus["settings"].addAction(self.shortcutsAct)
        self.__menus["settings"].addAction(self.exportShortcutsAct)
        self.__menus["settings"].addAction(self.importShortcutsAct)
        self.__menus["settings"].addSeparator()
        self.__menus["settings"].addAction(self.showExternalToolsAct)
        
        self.__menus["window"] = QMenu(self.trUtf8('&Window'), self)
        mb.addMenu(self.__menus["window"])
        self.__menus["window"].setTearOffEnabled(True)
        self.__menus["window"].aboutToShow.connect(self.__showWindowMenu)
        
        self.__menus["toolbars"] = \
            QMenu(self.trUtf8("&Toolbars"), self.__menus["window"])
        self.__menus["toolbars"].setTearOffEnabled(True)
        self.__menus["toolbars"].aboutToShow.connect(self.__showToolbarsMenu)
        self.__menus["toolbars"].triggered.connect(self.__TBMenuTriggered)
        
        self.__showWindowMenu() # to initialize these actions

        self.__menus["bookmarks"] = self.viewmanager.initBookmarkMenu()
        mb.addMenu(self.__menus["bookmarks"])
        self.__menus["bookmarks"].setTearOffEnabled(True)

        self.__menus["plugins"] = QMenu(self.trUtf8('P&lugins'), self)
        mb.addMenu(self.__menus["plugins"])
        self.__menus["plugins"].setTearOffEnabled(True)
        self.__menus["plugins"].addAction(self.pluginInfoAct)
        self.__menus["plugins"].addAction(self.pluginInstallAct)
        self.__menus["plugins"].addAction(self.pluginDeinstallAct)
        self.__menus["plugins"].addSeparator()
        self.__menus["plugins"].addAction(self.pluginRepoAct)
        self.__menus["plugins"].addSeparator()
        self.__menus["plugins"].addAction(
            self.trUtf8("Configure..."), self.__pluginsConfigure)

        mb.addSeparator()

        self.__menus["help"] = QMenu(self.trUtf8('&Help'), self)
        mb.addMenu(self.__menus["help"])
        self.__menus["help"].setTearOffEnabled(True)
        self.__menus["help"].addAction(self.helpviewerAct)
        self.__menus["help"].addSeparator()
        self.__menus["help"].addAction(self.ericDocAct)
        self.__menus["help"].addAction(self.pythonDocAct)
        self.__menus["help"].addAction(self.qt4DocAct)
        self.__menus["help"].addAction(self.pyqt4DocAct)
        if self.pysideDocAct is not None:
            self.__menus["help"].addAction(self.pysideDocAct)
        self.__menus["help"].addSeparator()
        self.__menus["help"].addAction(self.versionAct)
        self.__menus["help"].addSeparator()
        self.__menus["help"].addAction(self.checkUpdateAct)
        self.__menus["help"].addAction(self.showVersionsAct)
        self.__menus["help"].addSeparator()
        self.__menus["help"].addAction(self.reportBugAct)
        self.__menus["help"].addAction(self.requestFeatureAct)
        self.__menus["help"].addSeparator()
        self.__menus["help"].addAction(self.whatsThisAct)
        self.__menus["help"].aboutToShow.connect(self.__showHelpMenu)
    
    def getToolBarIconSize(self):
        """
        Public method to get the toolbar icon size.
        
        @return toolbar icon size (QSize)
        """
        return Config.ToolBarIconSize
    
    def __initToolbars(self):
        """
        Private slot to create the toolbars.
        """
        filetb = self.viewmanager.initFileToolbar(self.toolbarManager)
        edittb = self.viewmanager.initEditToolbar(self.toolbarManager)
        searchtb, quicksearchtb = self.viewmanager.initSearchToolbars(self.toolbarManager)
        viewtb = self.viewmanager.initViewToolbar(self.toolbarManager)
        starttb, debugtb = self.debuggerUI.initToolbars(self.toolbarManager)
        multiprojecttb = self.multiProject.initToolbar(self.toolbarManager)
        projecttb = self.project.initToolbar(self.toolbarManager)
        toolstb = QToolBar(self.trUtf8("Tools"), self)
        unittesttb = QToolBar(self.trUtf8("Unittest"), self)
        bookmarktb = self.viewmanager.initBookmarkToolbar(self.toolbarManager)
        spellingtb = self.viewmanager.initSpellingToolbar(self.toolbarManager)
        settingstb = QToolBar(self.trUtf8("Settings"), self)
        helptb = QToolBar(self.trUtf8("Help"), self)
        profilestb = QToolBar(self.trUtf8("Profiles"), self)
        pluginstb = QToolBar(self.trUtf8("Plugins"), self)
        
        toolstb.setIconSize(Config.ToolBarIconSize)
        unittesttb.setIconSize(Config.ToolBarIconSize)
        settingstb.setIconSize(Config.ToolBarIconSize)
        helptb.setIconSize(Config.ToolBarIconSize)
        profilestb.setIconSize(Config.ToolBarIconSize)
        pluginstb.setIconSize(Config.ToolBarIconSize)
        
        toolstb.setObjectName("ToolsToolbar")
        unittesttb.setObjectName("UnittestToolbar")
        settingstb.setObjectName("SettingsToolbar")
        helptb.setObjectName("HelpToolbar")
        profilestb.setObjectName("ProfilesToolbar")
        pluginstb.setObjectName("PluginsToolbar")
        
        toolstb.setToolTip(self.trUtf8("Tools"))
        unittesttb.setToolTip(self.trUtf8("Unittest"))
        settingstb.setToolTip(self.trUtf8("Settings"))
        helptb.setToolTip(self.trUtf8("Help"))
        profilestb.setToolTip(self.trUtf8("Profiles"))
        pluginstb.setToolTip(self.trUtf8("Plugins"))
        
        filetb.addSeparator()
        filetb.addAction(self.exitAct)
        self.toolbarManager.addToolBar(filetb, filetb.windowTitle())
        
        # setup the unittest toolbar
        unittesttb.addAction(self.utDialogAct)
        unittesttb.addSeparator()
        unittesttb.addAction(self.utRestartAct)
        unittesttb.addAction(self.utScriptAct)
        unittesttb.addAction(self.utProjectAct)
        self.toolbarManager.addToolBar(unittesttb, unittesttb.windowTitle())
        
        # setup the tools toolbar
        if self.designer4Act is not None:
            toolstb.addAction(self.designer4Act)
        if self.linguist4Act is not None:
            toolstb.addAction(self.linguist4Act)
        toolstb.addAction(self.uipreviewerAct)
        toolstb.addAction(self.trpreviewerAct)
        toolstb.addSeparator()
        toolstb.addAction(self.diffAct)
        toolstb.addAction(self.compareAct)
        toolstb.addSeparator()
        toolstb.addAction(self.sqlBrowserAct)
        toolstb.addSeparator()
        toolstb.addAction(self.miniEditorAct)
        toolstb.addAction(self.iconEditorAct)
        toolstb.addSeparator()
        toolstb.addAction(self.webBrowserAct)
        self.toolbarManager.addToolBar(toolstb, toolstb.windowTitle())
        
        # setup the settings toolbar
        settingstb.addAction(self.prefAct)
        settingstb.addAction(self.configViewProfilesAct)
        settingstb.addAction(self.configToolBarsAct)
        settingstb.addAction(self.shortcutsAct)
        settingstb.addAction(self.showExternalToolsAct)
        self.toolbarManager.addToolBar(settingstb, settingstb.windowTitle())
        self.toolbarManager.addAction(self.exportShortcutsAct, settingstb.windowTitle())
        self.toolbarManager.addAction(self.importShortcutsAct, settingstb.windowTitle())
        
        # setup the help toolbar
        helptb.addAction(self.whatsThisAct)
        self.toolbarManager.addToolBar(helptb, helptb.windowTitle())
        self.toolbarManager.addAction(self.helpviewerAct, helptb.windowTitle())
        
        # setup the view profiles toolbar
        profilestb.addActions(self.viewProfileActGrp.actions())
        self.toolbarManager.addToolBar(profilestb, profilestb.windowTitle())
        
        # setup the plugins toolbar
        pluginstb.addAction(self.pluginInfoAct)
        pluginstb.addAction(self.pluginInstallAct)
        pluginstb.addAction(self.pluginDeinstallAct)
        pluginstb.addSeparator()
        pluginstb.addAction(self.pluginRepoAct)
        self.toolbarManager.addToolBar(pluginstb, pluginstb.windowTitle())
        
        self.addToolBar(filetb)
        self.addToolBar(edittb)
        self.addToolBar(searchtb)
        self.addToolBar(quicksearchtb)
        self.addToolBar(viewtb)
        self.addToolBar(starttb)
        self.addToolBar(debugtb)
        self.addToolBar(multiprojecttb)
        self.addToolBar(projecttb)
        self.addToolBar(toolstb)
        self.addToolBar(helptb)
        self.addToolBar(settingstb)
        self.addToolBar(bookmarktb)
        self.addToolBar(spellingtb)
        self.addToolBar(unittesttb)
        self.addToolBar(profilestb)
        self.addToolBar(pluginstb)

        # just add new toolbars to the end of the list
        self.__toolbars = {}
        self.__toolbars["file"] = [filetb.windowTitle(), filetb]
        self.__toolbars["edit"] = [edittb.windowTitle(), edittb]
        self.__toolbars["search"] = [searchtb.windowTitle(), searchtb]
        self.__toolbars["view"] = [viewtb.windowTitle(), viewtb]
        self.__toolbars["start"] = [starttb.windowTitle(), starttb]
        self.__toolbars["debug"] = [debugtb.windowTitle(), debugtb]
        self.__toolbars["project"] = [projecttb.windowTitle(), projecttb]
        self.__toolbars["tools"] = [toolstb.windowTitle(), toolstb]
        self.__toolbars["help"] = [helptb.windowTitle(), helptb]
        self.__toolbars["settings"] = [settingstb.windowTitle(), settingstb]
        self.__toolbars["bookmarks"] = [bookmarktb.windowTitle(), bookmarktb]
        self.__toolbars["unittest"] = [unittesttb.windowTitle(), unittesttb]
        self.__toolbars["view_profiles"] = [profilestb.windowTitle(), profilestb]
        self.__toolbars["plugins"] = [pluginstb.windowTitle(), pluginstb]
        self.__toolbars["quicksearch"] = [quicksearchtb.windowTitle(), quicksearchtb]
        self.__toolbars["multiproject"] = [multiprojecttb.windowTitle(), multiprojecttb]
        self.__toolbars["spelling"] = [spellingtb.windowTitle(), spellingtb]
        
    def __initStatusbar(self):
        """
        Private slot to set up the status bar.
        """
        self.__statusBar = self.statusBar()
        self.__statusBar.setSizeGripEnabled(True)

        self.sbLanguage = QLabel(self.__statusBar)
        self.__statusBar.addPermanentWidget(self.sbLanguage)
        self.sbLanguage.setWhatsThis(self.trUtf8(
            """<p>This part of the status bar displays the"""
            """ current editors language.</p>"""
        ))

        self.sbEncoding = QLabel(self.__statusBar)
        self.__statusBar.addPermanentWidget(self.sbEncoding)
        self.sbEncoding.setWhatsThis(self.trUtf8(
            """<p>This part of the status bar displays the"""
            """ current editors encoding.</p>"""
        ))

        self.sbEol = QLabel(self.__statusBar)
        self.__statusBar.addPermanentWidget(self.sbEol)
        self.sbEol.setWhatsThis(self.trUtf8(
            """<p>This part of the status bar displays the"""
            """ current editors eol setting.</p>"""
        ))

        self.sbWritable = QLabel(self.__statusBar)
        self.__statusBar.addPermanentWidget(self.sbWritable)
        self.sbWritable.setWhatsThis(self.trUtf8(
            """<p>This part of the status bar displays an indication of the"""
            """ current editors files writability.</p>"""
        ))

        self.sbFile = E5SqueezeLabelPath(self.__statusBar)
        self.sbFile.setMaximumWidth(500)
        self.sbFile.setMinimumWidth(100)
        self.__statusBar.addPermanentWidget(self.sbFile, True)
        self.sbFile.setWhatsThis(self.trUtf8(
            """<p>This part of the status bar displays the name of the file of"""
            """ the current editor.</p>"""
        ))

        self.sbLine = QLabel(self.__statusBar)
        self.__statusBar.addPermanentWidget(self.sbLine)
        self.sbLine.setWhatsThis(self.trUtf8(
            """<p>This part of the status bar displays the line number of the"""
            """ current editor.</p>"""
        ))

        self.sbPos = QLabel(self.__statusBar)
        self.__statusBar.addPermanentWidget(self.sbPos)
        self.sbPos.setWhatsThis(self.trUtf8(
            """<p>This part of the status bar displays the cursor position of"""
            """ the current editor.</p>"""
        ))
        
        self.viewmanager.setSbInfo(self.sbFile, self.sbLine, self.sbPos, 
                                   self.sbWritable, self.sbEncoding, self.sbLanguage, 
                                   self.sbEol)

        self.sbVcsMonitorLed = StatusMonitorLed(self.project, self.__statusBar)
        self.__statusBar.addPermanentWidget(self.sbVcsMonitorLed)
    
    def __initExternalToolsActions(self):
        """
        Private slot to create actions for the configured external tools.
        """
        self.toolGroupActions = {}
        for toolGroup in self.toolGroups:
            category = self.trUtf8("External Tools/{0}").format(toolGroup[0])
            for tool in toolGroup[1]:
                if tool['menutext'] != '--':
                    act = QAction(UI.PixmapCache.getIcon(tool['icon']), tool['menutext'], 
                                  self)
                    act.setObjectName("{0}@@{1}".format(toolGroup[0], 
                                      tool['menutext']))
                    act.triggered[()].connect(self.__toolActionTriggered)
                    self.toolGroupActions[act.objectName()] = act
                    
                    self.toolbarManager.addAction(act, category)
    
    def __updateExternalToolsActions(self):
        """
        Private method to update the external tools actions for the current tool group.
        """
        toolGroup = self.toolGroups[self.currentToolGroup]
        groupkey = "{0}@@".format(toolGroup[0])
        groupActionKeys = []
        # step 1: get actions for this group
        for key in self.toolGroupActions:
            if key.startswith(groupkey):
                groupActionKeys.append(key)
        
        # step 2: build keys for all actions i.a.w. current configuration
        ckeys = []
        for tool in toolGroup[1]:
            if tool['menutext'] != '--':
                ckeys.append("{0}@@{1}".format(toolGroup[0], tool['menutext']))
        
        # step 3: remove all actions not configured any more
        for key in groupActionKeys:
            if key not in ckeys:
                self.toolbarManager.removeAction(self.toolGroupActions[key])
                self.toolGroupActions[key].triggered[()].disconnect(
                    self.__toolActionTriggered)
                del self.toolGroupActions[key]
        
        # step 4: add all newly configured tools
        category = self.trUtf8("External Tools/{0}").format(toolGroup[0])
        for tool in toolGroup[1]:
            if tool['menutext'] != '--':
                key = "{0}@@{1}".format(toolGroup[0], tool['menutext'])
                if key not in groupActionKeys:
                    act = QAction(UI.PixmapCache.getIcon(tool['icon']), tool['menutext'], 
                                  self)
                    act.setObjectName(key)
                    act.triggered[()].connect(self.__toolActionTriggered)
                    self.toolGroupActions[key] = act
                    
                    self.toolbarManager.addAction(act, category)
    
    def __showFileMenu(self):
        """
        Private slot to display the File menu.
        """
        self.showMenu.emit("File", self.__menus["file"])
    
    def __showExtrasMenu(self):
        """
        Private slot to display the Extras menu.
        """
        self.showMenu.emit("Extras", self.__menus["extras"])
    
    def __showWizardsMenu(self):
        """
        Private slot to display the Wizards menu.
        """
        self.showMenu.emit("Wizards", self.__menus["wizards"])
    
    def __showHelpMenu(self):
        """
        Private slot to display the Help menu.
        """
        self.checkUpdateAct.setEnabled(not self.__inVersionCheck)
        self.showVersionsAct.setEnabled(not self.__inVersionCheck)
        
        self.showMenu.emit("Help", self.__menus["help"])
    
    def __showNext(self):
        """
        Private slot used to show the next tab or file.
        """
        fwidget = QApplication.focusWidget()
        while fwidget and not hasattr(fwidget, 'nextTab'):
            fwidget = fwidget.parent()
        if fwidget:
            fwidget.nextTab()

    def __showPrevious(self):
        """
        Private slot used to show the previous tab or file.
        """
        fwidget = QApplication.focusWidget()
        while fwidget and not hasattr(fwidget, 'prevTab'):
            fwidget = fwidget.parent()
        if fwidget:
            fwidget.prevTab()
    
    def __switchTab(self):
        """
        Private slot used to switch between the current and the previous current tab.
        """
        fwidget = QApplication.focusWidget()
        while fwidget and not hasattr(fwidget, 'switchTab'):
            fwidget = fwidget.parent()
        if fwidget:
            fwidget.switchTab()
    
    def __whatsThis(self):
        """
        Private slot called in to enter Whats This mode.
        """
        QWhatsThis.enterWhatsThisMode()
        
    def __showVersions(self):
        """
        Private slot to handle the Versions dialog.
        """
        try:
            import sipconfig
            sip_version_str = sipconfig.Configuration().sip_version_str
        except ImportError:
            sip_version_str = "sip version not available"
        
        versionText = self.trUtf8(
            """<h3>Version Numbers</h3>"""
            """<table>""")
        versionText += """<tr><td><b>Python</b></td><td>{0}</td></tr>"""\
            .format(sys.version.split()[0])
        versionText += """<tr><td><b>Qt</b></td><td>{0}</td></tr>"""\
            .format(qVersion())
        versionText += """<tr><td><b>PyQt</b></td><td>{0}</td></tr>"""\
            .format(PYQT_VERSION_STR)
        versionText += """<tr><td><b>sip</b></td><td>{0}</td></tr>"""\
            .format(sip_version_str)
        versionText += """<tr><td><b>QScintilla</b></td><td>{0}</td></tr>"""\
            .format(QSCINTILLA_VERSION_STR)
        try:
            from PyQt4.QtWebKit import qWebKitVersion
            versionText += """<tr><td><b>WebKit</b></td><td>{0}</td></tr>"""\
            .format(qWebKitVersion())
        except ImportError:
            pass
        versionText += """<tr><td><b>{0}</b></td><td>{1}</td></tr>"""\
            .format(Program, Version)
        versionText += self.trUtf8("""</table>""")
        
        E5MessageBox.about(self, Program, versionText)
        
    def __reportBug(self):
        """
        Private slot to handle the Report Bug dialog.
        """
        self.__showEmailDialog("bug")
        
    def __requestFeature(self):
        """
        Private slot to handle the Feature Request dialog.
        """
        self.__showEmailDialog("feature")
        
    def __showEmailDialog(self, mode, attachFile = None, deleteAttachFile = False):
        """
        Private slot to show the email dialog in a given mode.
        
        @param mode mode of the email dialog (string, "bug" or "feature")
        @param attachFile name of a file to attach to the email (string)
        @param deleteAttachFile flag indicating to delete the attached file after
            it has been sent (boolean)
        """
        if Preferences.getUser("UseSystemEmailClient"):
            self.__showSystemEmailClient(mode, attachFile, deleteAttachFile)
        else:
            if Preferences.getUser("Email") == "" or \
               Preferences.getUser("MailServer") == "":
                E5MessageBox.critical(self,
                    self.trUtf8("Report Bug"),
                    self.trUtf8("""Email address or mail server address is empty.""" 
                                """ Please configure your Email settings in the"""
                                """ Preferences Dialog."""))
                self.showPreferences("emailPage")
                return
                
            self.dlg = EmailDialog(mode = mode)
            if attachFile is not None:
                self.dlg.attachFile(attachFile, deleteAttachFile)
            self.dlg.show()
        
    def __showSystemEmailClient(self, mode, attachFile = None, deleteAttachFile = False):
        """
        Private slot to show the system email dialog.
        
        @param mode mode of the email dialog (string, "bug" or "feature")
        @param attachFile name of a file to put into the body of the 
            email (string)
        @param deleteAttachFile flag indicating to delete the file after
            it has been read (boolean)
        """
        if mode == "feature":
            address = FeatureAddress
        else:
            address = BugAddress
        subject = "[eric5] "
        if attachFile is not None:
            f = open(attachFile, "r", encoding = "utf-8")
            body = f.read()
            f.close()
            if deleteAttachFile:
                os.remove(attachFile)
        else:
            body = "\r\n----\r\n{0}----\r\n{1}----\r\n{2}".format(
                Utilities.generateVersionInfo("\r\n"), 
                Utilities.generatePluginsVersionInfo("\r\n"), 
                Utilities.generateDistroInfo("\r\n"))
        
        url = QUrl("mailto:{0}".format(address))
        url.addQueryItem("subject", subject)
        url.addQueryItem("body", body)
        QDesktopServices.openUrl(url)
        
    def checkForErrorLog(self):
        """
        Public method to check for the presence of an error log and ask the user,
        what to do with it.
        """
        if Preferences.getUI("CheckErrorLog"):
            logFile = os.path.join(Utilities.getConfigDir(), "eric5_error.log")
            if os.path.exists(logFile):
                dlg = E5MessageBox.E5MessageBox(E5MessageBox.Question, 
                    self.trUtf8("Error log found"), 
                    self.trUtf8("An error log file was found. "
                                "What should be done with it?"), 
                    modal = True, parent = self)
                try:
                    f = open(logFile, "r", encoding = "utf-8")
                    txt = f.read()
                    f.close()
                    dlg.setDetailedText(txt)
                except IOError:
                    pass
                emailButton = \
                    dlg.addButton(self.trUtf8("Send Bug Email"), 
                                  E5MessageBox.AcceptRole)
                deleteButton = \
                    dlg.addButton(self.trUtf8("Ignore and Delete"), 
                                  E5MessageBox.AcceptRole)
                keepButton = \
                    dlg.addButton(self.trUtf8("Ignore but Keep"), 
                                  E5MessageBox.AcceptRole)
                dlg.setDefaultButton(emailButton)
                dlg.setEscapeButton(keepButton)
                dlg.exec_()
                btn = dlg.clickedButton()
                if btn == emailButton:
                    # start email dialog
                    self.__showEmailDialog("bug", 
                        attachFile = logFile, deleteAttachFile = True)
                elif btn == deleteButton:
                    # delete the error log
                    os.remove(logFile)
                elif btn == keepButton:
                    # keep the error log
                    pass
        
    def __compareFiles(self):
        """
        Private slot to handle the Compare Files dialog.
        """
        aw = self.viewmanager.activeWindow()
        fn = aw and aw.getFileName() or None
        self.diffDlg.show(fn)
        
    def __compareFilesSbs(self):
        """
        Private slot to handle the Compare Files dialog.
        """
        aw = self.viewmanager.activeWindow()
        fn = aw and aw.getFileName() or None
        self.compareDlg.show(fn)
        
    def __openMiniEditor(self):
        """
        Private slot to show a mini editor window.
        """
        editor = MiniEditor(parent = self)
        editor.show()
        
    def addE5Actions(self, actions, type):
        """
        Public method to add actions to the list of actions.
        
        @param type string denoting the action set to get.
            It must be one of "ui" or "wizards".
        @param actions list of actions to be added (list of E5Action)
        """
        if type == 'ui':
            self.actions.extend(actions)
        elif type == 'wizards':
            self.wizardsActions.extend(actions)
        
    def removeE5Actions(self, actions, type = 'ui'):
        """
        Public method to remove actions from the list of actions.
        
        @param type string denoting the action set to get.
            It must be one of "ui" or "wizards".
        @param actions list of actions (list of E5Action)
        """
        for act in actions:
            try:
                if type == 'ui':
                    self.actions.remove(act)
                elif type == 'wizards':
                    self.wizardsActions.remove(act)
            except ValueError:
                pass
        
    def getActions(self, type):
        """
        Public method to get a list of all actions.
        
        @param type string denoting the action set to get.
            It must be one of "ui" or "wizards".
        @return list of all actions (list of E5Action)
        """
        if type == 'ui':
            return self.actions[:]
        elif type == 'wizards':
            return self.wizardsActions[:]
        else:
            return []
        
    def getMenuAction(self, menuName, actionName):
        """
        Public method to get a reference to an action of a menu.
        
        @param menuName name of the menu to search in (string)
        @param actionName object name of the action to search for 
            (string)
        """
        try:
            menu = self.__menus[menuName]
        except KeyError:
            return None
        
        for act in menu.actions():
            if act.objectName() == actionName:
                return act
        
        return None
        
    def getMenuBarAction(self, menuName):
        """
        Public method to get a reference to an action of the main menu.
        
        @param menuName name of the menu to search in (string)
        """
        try:
            menu = self.__menus[menuName]
        except KeyError:
            return None
        
        return menu.menuAction()
        
    def getMenu(self, name):
        """
        Public method to get a reference to a specific menu.
        
        @param name name of the menu (string)
        @return reference to the menu (QMenu)
        """
        try:
            return self.__menus[name]
        except KeyError:
            return None
        
    def registerToolbar(self, name, text, toolbar):
        """
        Public method to register a toolbar.
        
        This method must be called in order to make a toolbar manageable by the
        UserInterface object.
        
        @param name name of the toolbar (string). This is used as the key into
            the dictionary of toolbar references.
        @param text user visible text for the toolbar entry (string)
        @param toolbar reference to the toolbar to be registered (QToolBar)
        @exception KeyError raised, if a toolbar with the given name was
            already registered
        """
        if name in self.__toolbars:
            raise KeyError("Toolbar '{0}' already registered.".format(name))
        
        self.__toolbars[name] = [text, toolbar]
        
    def reregisterToolbar(self, name, text):
        """
        Public method to change the visible text for the named toolbar.
        
        @param name name of the toolbar to be changed (string)
        @param text new user visible text for the toolbar entry (string)
        """
        if name in self.__toolbars:
            self.__toolbars[name][0] = text
        
    def unregisterToolbar(self, name):
        """
        Public method to unregister a toolbar.
        
        @param name name of the toolbar (string).
        """
        if name in self.__toolbars:
            del self.__toolbars[name]
        
    def getToolbar(self, name):
        """
        Public method to get a reference to a specific toolbar.
        
        @param name name of the toolbar (string)
        @return reference to the toolbar entry (tuple of string and QToolBar)
        """
        try:
            return self.__toolbars[name]
        except KeyError:
            return None
        
    def getLocale(self):
        """
        Public method to get the locale of the IDE.
        
        @return locale of the IDE (string or None)
        """
        return self.locale
        
    def __quit(self):
        """
        Private method to quit the application.
        """
        if self.__shutdown():
            e5App().closeAllWindows()
        
    def __restart(self):
        """
        Private method to restart the application.
        """
        res = E5MessageBox.yesNo(self,
            self.trUtf8("Restart application"),
            self.trUtf8("""The application needs to be restarted. Do it now?"""),
            yesDefault = True)
        
        if res and self.__shutdown():
            e5App().closeAllWindows()
            program = sys.executable
            eric5 = os.path.join(getConfig("ericDir"), "eric5.py")
            args = [eric5]
            args.append("--start-session")
            args.extend(self.__restartArgs)
            QProcess.startDetached(program, args)
        
    def __showToolsMenu(self):
        """
        Private slot to display the Tools menu.
        """
        self.__menus["tools"].clear()
        
        self.__menus["tools"].addMenu(self.toolGroupsMenu)
        act = self.__menus["tools"].addAction(self.trUtf8("Configure Tool Groups ..."),
            self.__toolGroupsConfiguration)
        act.setData(-1)
        act = self.__menus["tools"].addAction(
            self.trUtf8("Configure current Tool Group ..."), 
            self.__toolsConfiguration)
        act.setData(-2)
        self.__menus["tools"].addSeparator()
        
        if self.currentToolGroup == -1:
            act.setEnabled(False)
            # add the default entries
            if self.designer4Act is not None:
                self.__menus["tools"].addAction(self.designer4Act)
            if self.linguist4Act is not None:
                self.__menus["tools"].addAction(self.linguist4Act)
            self.__menus["tools"].addAction(self.uipreviewerAct)
            self.__menus["tools"].addAction(self.trpreviewerAct)
            self.__menus["tools"].addAction(self.diffAct)
            self.__menus["tools"].addAction(self.compareAct)
            self.__menus["tools"].addAction(self.sqlBrowserAct)
            self.__menus["tools"].addAction(self.miniEditorAct)
            self.__menus["tools"].addAction(self.iconEditorAct)
            self.__menus["tools"].addAction(self.webBrowserAct)
        elif self.currentToolGroup == -2:
            act.setEnabled(False)
            # add the plugin entries
            self.showMenu.emit("Tools", self.__menus["tools"])
        else:
            # add the configurable entries
            idx = 0
            try:
                for tool in self.toolGroups[self.currentToolGroup][1]:
                    if tool['menutext'] == '--':
                        self.__menus["tools"].addSeparator()
                    else:
                        act = self.__menus["tools"].addAction(
                            UI.PixmapCache.getIcon(tool['icon']), tool['menutext'])
                        act.setData(idx)
                    idx += 1
            except IndexError:
                # the current tool group might have been deleted
                pass
        
    def __showToolGroupsMenu(self):
        """
        Private slot to display the Tool Groups menu.
        """
        self.toolGroupsMenu.clear()
        
        # add the default entry
        act = self.toolGroupsMenu.addAction(self.trUtf8("&Builtin Tools"))
        act.setData(-1)
        if self.currentToolGroup == -1:
            font = act.font()
            font.setBold(True)
            act.setFont(font)
        
        # add the plugins entry
        act = self.toolGroupsMenu.addAction(self.trUtf8("&Plugin Tools"))
        act.setData(-2)
        if self.currentToolGroup == -2:
            font = act.font()
            font.setBold(True)
            act.setFont(font)
        
        # add the configurable tool groups
        idx = 0
        for toolGroup in self.toolGroups:
            act = self.toolGroupsMenu.addAction(toolGroup[0])
            act.setData(idx)
            if self.currentToolGroup == idx:
                font = act.font()
                font.setBold(True)
                act.setFont(font)
            idx += 1
        
    def __toolGroupSelected(self, act):
        """
        Private slot to set the current tool group.
        
        @param act reference to the action that was triggered (QAction)
        """
        self.toolGroupsMenuTriggered = True
        idx = act.data()
        if idx is not None:
            self.currentToolGroup = idx
        
    def __showWindowMenu(self):
        """
        Private slot to display the Window menu.
        """
        self.__menus["window"].clear()
        
        self.__menus["window"].addActions(self.viewProfileActGrp.actions())
        self.__menus["window"].addSeparator()
        
        if self.layout == "Toolboxes":
            self.__menus["window"].addAction(self.vtAct)
            self.vtAct.setChecked(not self.vToolboxDock.isHidden())
            self.__menus["window"].addAction(self.htAct)
            self.htAct.setChecked(not self.hToolboxDock.isHidden())
            self.__menus["window"].addAction(self.cooperationViewerAct)
            self.cooperationViewerAct.setChecked(not self.cooperationDock.isHidden())
            self.__menus["window"].addAction(self.debugViewerAct)
            self.debugViewerAct.setChecked(not self.debugViewerDock.isHidden())
        elif self.layout == "Sidebars":
            self.__menus["window"].addAction(self.lsbAct)
            self.lsbAct.setChecked(not self.leftSidebar.isHidden())
            self.__menus["window"].addAction(self.bsbAct)
            self.bsbAct.setChecked(not self.bottomSidebar.isHidden())
            self.__menus["window"].addAction(self.cooperationViewerAct)
            self.cooperationViewerAct.setChecked(not self.cooperationDock.isHidden())
            self.__menus["window"].addAction(self.debugViewerAct)
            self.debugViewerAct.setChecked(not self.debugViewerDock.isHidden())
        else:
            # Set the options according to what is being displayed.
            self.__menus["window"].addAction(self.pbAct)
            if self.layout == "DockWindows":
                self.pbAct.setChecked(not self.projectBrowserDock.isHidden())
            else:
                self.pbAct.setChecked(not self.projectBrowser.isHidden())
            
            self.__menus["window"].addAction(self.mpbAct)
            if self.layout == "DockWindows":
                self.mpbAct.setChecked(not self.multiProjectBrowserDock.isHidden())
            else:
                self.mpbAct.setChecked(not self.multiProjectBrowser.isHidden())
            
            if not self.embeddedFileBrowser:
                self.__menus["window"].addAction(self.browserAct)
                if self.layout == "DockWindows":
                    self.browserAct.setChecked(not self.browserDock.isHidden())
                else:
                    self.browserAct.setChecked(not self.browser.isHidden())
                
            self.__menus["window"].addAction(self.debugViewerAct)
            if self.layout == "DockWindows":
                self.debugViewerAct.setChecked(not self.debugViewerDock.isHidden())
            else:
                self.debugViewerAct.setChecked(not self.debugViewer.isHidden())
            
            if not self.embeddedShell:
                self.__menus["window"].addAction(self.shellAct)
                if self.layout == "DockWindows":
                    self.shellAct.setChecked(not self.shellDock.isHidden())
                else:
                    self.shellAct.setChecked(not self.shell.isHidden())
            
            self.__menus["window"].addAction(self.terminalAct)
            if self.layout == "DockWindows":
                self.terminalAct.setChecked(not self.terminalDock.isHidden())
            else:
                self.terminalAct.setChecked(not self.terminal.isHidden())
            
            self.__menus["window"].addAction(self.logViewerAct)
            if self.layout == "DockWindows":
                self.logViewerAct.setChecked(not self.logViewerDock.isHidden())
            else:
                self.logViewerAct.setChecked(not self.logViewer.isHidden())
            
            self.__menus["window"].addAction(self.taskViewerAct)
            if self.layout == "DockWindows":
                self.taskViewerAct.setChecked(not self.taskViewerDock.isHidden())
            else:
                self.taskViewerAct.setChecked(not self.taskViewer.isHidden())

            self.__menus["window"].addAction(self.templateViewerAct)
            if self.layout == "DockWindows":
                self.templateViewerAct.setChecked(not self.templateViewerDock.isHidden())
            else:
                self.templateViewerAct.setChecked(not self.templateViewer.isHidden())

            self.__menus["window"].addAction(self.cooperationViewerAct)
            if self.layout == "DockWindows":
                self.cooperationViewerAct.setChecked(not self.cooperationDock.isHidden())
            else:
                self.cooperationViewerAct.setChecked(not self.cooperation.isHidden())
            
            self.__menus["window"].addAction(self.symbolsViewerAct)
            if self.layout == "DockWindows":
                self.symbolsViewerAct.setChecked(not self.symbolsDock.isHidden())
            else:
                self.symbolsViewerAct.setChecked(not self.symbolsViewer.isHidden())

        # Insert menu entry for toolbar settings
        self.__menus["window"].addSeparator()
        self.__menus["window"].addMenu(self.__menus["toolbars"])
        
        # Now do any Source Viewer related stuff.
        self.viewmanager.showWindowMenu(self.__menus["window"])
        
        self.showMenu.emit("Window", self.__menus["window"])
        
    def __showToolbarsMenu(self):
        """
        Private slot to display the Toolbars menu.
        """
        self.__menus["toolbars"].clear()
        
        tbList = []
        for name, (text, tb) in list(self.__toolbars.items()):
            tbList.append((text, tb, name))
        
        tbList.sort()
        for text, tb, name in tbList:
            act = self.__menus["toolbars"].addAction(text)
            act.setCheckable(True)
            act.setData(name)
            act.setChecked(not tb.isHidden())
        self.__menus["toolbars"].addSeparator()
        self.__toolbarsShowAllAct = \
            self.__menus["toolbars"].addAction(self.trUtf8("&Show all"))
        self.__toolbarsHideAllAct = \
            self.__menus["toolbars"].addAction(self.trUtf8("&Hide all"))

    def __TBMenuTriggered(self, act):
        """
        Private method to handle the toggle of a toolbar.
        
        @param act reference to the action that was triggered (QAction)
        """
        if act == self.__toolbarsShowAllAct:
            for text, tb in list(self.__toolbars.values()):
                tb.show()
            if self.__menus["toolbars"].isTearOffMenuVisible():
                self.__showToolbarsMenu()
        elif act == self.__toolbarsHideAllAct:
            for text, tb in list(self.__toolbars.values()):
                tb.hide()
            if self.__menus["toolbars"].isTearOffMenuVisible():
                self.__showToolbarsMenu()
        else:
            name = act.data()
            if name:
                tb = self.__toolbars[name][1]
                if act.isChecked():
                    tb.show()
                else:
                    tb.hide()
        
    def __saveCurrentViewProfile(self, save):
        """
        Private slot to save the window geometries of the active profile.
        
        @param save flag indicating that the current profile should
            be saved (boolean)
        """
        if self.currentProfile and save:
            # step 1: save the window geometries of the active profile
            if self.layout == "DockWindows":
                state = self.saveState()
                self.profiles[self.currentProfile][1] = bytes(state)
            elif self.layout in ["Toolboxes", "Sidebars"]:
                state = self.saveState()
                self.profiles[self.currentProfile][4] = bytes(state)
                if self.layout == "Sidebars":
                    state = self.horizontalSplitter.saveState()
                    self.profiles[self.currentProfile][6][0] = bytes(state)
                    state = self.verticalSplitter.saveState()
                    self.profiles[self.currentProfile][6][1] = bytes(state)
                    state = self.leftSidebar.saveState()
                    self.profiles[self.currentProfile][6][2] = bytes(state)
                    state = self.bottomSidebar.saveState()
                    self.profiles[self.currentProfile][6][3] = bytes(state)
            elif self.layout == "FloatingWindows":
                state = self.saveState()
                self.profiles[self.currentProfile][3] = bytes(state)
                for window, i in zip(self.windows, list(range(len(self.windows)))):
                    if window is not None:
                        self.profiles[self.currentProfile][2][i] = \
                            bytes(window.saveGeometry())
            # step 2: save the visibility of the windows of the active profile
            for window, i in zip(self.windows, list(range(len(self.windows)))):
                if window is not None:
                    self.profiles[self.currentProfile][0][i] = window.isVisible()
            if self.layout == "Toolboxes":
                self.profiles[self.currentProfile][5][0] = self.vToolboxDock.isVisible()
                self.profiles[self.currentProfile][5][1] = self.hToolboxDock.isVisible()
            elif self.layout == "Sidebars":
                self.profiles[self.currentProfile][5][0] = self.leftSidebar.isVisible()
                self.profiles[self.currentProfile][5][1] = self.bottomSidebar.isVisible()
            Preferences.setUI("ViewProfiles", self.profiles)
    
    def __activateViewProfile(self, name, save = True):
        """
        Private slot to activate a view profile.
        
        @param name name of the profile to be activated (string)
        @param save flag indicating that the current profile should
            be saved (boolean)
        """
        if self.currentProfile != name or not save:
            # step 1: save the active profile
            self.__saveCurrentViewProfile(save)
            
            # step 2: set the window geometries of the new profile
            if self.layout == "DockWindows":
                state = QByteArray(self.profiles[name][1])
                if not state.isEmpty():
                    self.restoreState(state)
                self.__configureDockareaCornerUsage()
            elif self.layout in ["Toolboxes", "Sidebars"]:
                state = QByteArray(self.profiles[name][4])
                if not state.isEmpty():
                    self.restoreState(state)
                if self.layout == "Sidebars":
                    state = QByteArray(self.profiles[name][6][0])
                    if not state.isEmpty():
                        self.horizontalSplitter.restoreState(state)
                    state = QByteArray(self.profiles[name][6][1])
                    if not state.isEmpty():
                        self.verticalSplitter.restoreState(state)
                    state = QByteArray(self.profiles[name][6][2])
                    if not state.isEmpty():
                        self.leftSidebar.restoreState(state)
                    state = QByteArray(self.profiles[name][6][3])
                    if not state.isEmpty():
                        self.bottomSidebar.restoreState(state)
                self.__configureDockareaCornerUsage()
            elif self.layout == "FloatingWindows":
                state = QByteArray(self.profiles[name][3])
                if not state.isEmpty():
                    self.restoreState(state)
                for window, i in zip(self.windows, list(range(len(self.windows)))):
                    if window is not None:
                        geo = QByteArray(self.profiles[name][2][i])
                        if not geo.isEmpty():
                            window.restoreGeometry(geo)
                            pass
            
            # step 3: activate the windows of the new profile
            for window, visible in zip(self.windows, self.profiles[name][0]):
                if window is not None:
                    window.setVisible(visible)
            if self.layout == "Toolboxes":
                self.vToolboxDock.setVisible(self.profiles[name][5][0])
                self.hToolboxDock.setVisible(self.profiles[name][5][1])
            elif self.layout == "Sidebars":
                self.leftSidebar.setVisible(self.profiles[name][5][0])
                self.bottomSidebar.setVisible(self.profiles[name][5][1])
            
            # step 4: remember the new profile
            self.currentProfile = name
            
            # step 5: make sure that cursor of the shell is visible
            self.shell.ensureCursorVisible()
            
            # step 6: make sure, that the toolbars and window menu are shown correctly
            if self.__menus["toolbars"].isTearOffMenuVisible():
                self.__showToolbarsMenu()
            if self.__menus["window"].isTearOffMenuVisible():
                self.__showWindowMenu()
        
    def __setEditProfile(self, save = True):
        """
        Private slot to activate the edit view profile.
        
        @param save flag indicating that the current profile should
            be saved (boolean)
        """
        self.__activateViewProfile("edit", save)
        self.setEditProfileAct.setChecked(True)
        
    def __debuggingStarted(self):
        """
        Private slot to handle the start of a debugging session.
        """
        self.setDebugProfile()
        if self.layout == "Toolboxes":
            if not self.embeddedShell:
                self.hToolbox.setCurrentWidget(self.shell)
        elif self.layout == "Sidebars":
            if not self.embeddedShell:
                self.bottomSidebar.setCurrentWidget(self.shell)
        
    def setDebugProfile(self, save = True):
        """
        Public slot to activate the debug view profile.
        
        @param save flag indicating that the current profile should
            be saved (boolean)
        """
        self.viewmanager.searchDlg.hide()
        self.viewmanager.replaceDlg.hide()
        self.__activateViewProfile("debug", save)
        self.setDebugProfileAct.setChecked(True)
        
    def getViewProfile(self):
        """
        Public method to get the current view profile.
        
        @return the name of the current view profile (string)
        """
        return self.currentProfile
        
    def __toggleProjectBrowser(self):
        """
        Private slot to handle the toggle of the Project Browser window.
        """
        hasFocus = self.projectBrowser.currentWidget().hasFocus()
        if self.layout == "DockWindows":
            shown = self.__toggleWindow(self.projectBrowserDock)
        else:
            shown = self.__toggleWindow(self.projectBrowser)
        if shown:
            self.__activateProjectBrowser()
        else:
            if hasFocus:
                self.__activateViewmanager()

    def __activateProjectBrowser(self):
        """
        Private slot to handle the activation of the project browser.
        """
        if self.layout == "DockWindows":
            self.projectBrowserDock.show()
            self.projectBrowserDock.raise_()
        elif self.layout == "Toolboxes":
            self.vToolboxDock.show()
            self.vToolbox.setCurrentWidget(self.projectBrowser)
        elif self.layout == "Sidebars":
            self.leftSidebar.show()
            self.leftSidebar.setCurrentWidget(self.projectBrowser)
        else:
            self.projectBrowser.show()
        self.projectBrowser.currentWidget().setFocus(Qt.ActiveWindowFocusReason)
        
    def __toggleMultiProjectBrowser(self):
        """
        Private slot to handle the toggle of the Project Browser window.
        """
        hasFocus = self.multiProjectBrowser.hasFocus()
        if self.layout == "DockWindows":
            shown = self.__toggleWindow(self.multiProjectBrowserDock)
        else:
            shown = self.__toggleWindow(self.multiProjectBrowser)
        if shown:
            self.__activateMultiProjectBrowser()
        else:
            if hasFocus:
                self.__activateViewmanager()

    def __activateMultiProjectBrowser(self):
        """
        Private slot to handle the activation of the project browser.
        """
        if self.layout == "DockWindows":
            self.multiProjectBrowserDock.show()
            self.multiProjectBrowserDock.raise_()
        elif self.layout == "Toolboxes":
            self.vToolboxDock.show()
            self.vToolbox.setCurrentWidget(self.multiProjectBrowser)
        elif self.layout == "Sidebars":
            self.leftSidebar.show()
            self.leftSidebar.setCurrentWidget(self.multiProjectBrowser)
        else:
            self.multiProjectBrowser.show()
        self.multiProjectBrowser.setFocus(Qt.ActiveWindowFocusReason)
        
    def __toggleDebugViewer(self):
        """
        Private slot to handle the toggle of the debug viewer.
        """
        hasFocus = self.debugViewer.currentWidget().hasFocus()
        if self.layout in ["DockWindows", "Toolboxes", "Sidebars"]:
            shown = self.__toggleWindow(self.debugViewerDock)
        else:
            shown = self.__toggleWindow(self.debugViewer)
        if shown:
            self.__activateDebugViewer()
        else:
            if hasFocus:
                self.__activateViewmanager()

    def __activateDebugViewer(self):
        """
        Private slot to handle the activation of the debug viewer.
        """
        if self.layout in ["DockWindows", "Toolboxes", "Sidebars"]:
            self.debugViewerDock.show()
            self.debugViewerDock.raise_()
        else:
            self.debugViewer.show()
        self.debugViewer.currentWidget().setFocus(Qt.ActiveWindowFocusReason)
        
    def __toggleShell(self):
        """
        Private slot to handle the toggle of the Shell window .
        """
        hasFocus = self.shell.hasFocus()
        if self.layout == "DockWindows":
            shown = self.__toggleWindow(self.shellDock)
        else:
            shown = self.__toggleWindow(self.shell)
        if shown:
            self.__activateShell()
        else:
            if hasFocus:
                self.__activateViewmanager()

    def __activateShell(self):
        """
        Private slot to handle the activation of the Shell window.
        """
        if self.embeddedShell:              # embedded in debug browser
            if self.layout in ["DockWindows", "Toolboxes", "Sidebars"]:
                self.debugViewerDock.show()
                self.debugViewerDock.raise_()
            else:
                self.debugViewer.show()
            self.debugViewer.setCurrentWidget(self.shell)
        else:                               # separate window
            if self.layout == "DockWindows":
                self.shellDock.show()
                self.shellDock.raise_()
            elif self.layout == "Toolboxes":
                self.hToolboxDock.show()
                self.hToolbox.setCurrentWidget(self.shell)
            elif self.layout == "Sidebars":
                self.bottomSidebar.show()
                self.bottomSidebar.setCurrentWidget(self.shell)
            else:
                self.shell.show()
        self.shell.setFocus(Qt.ActiveWindowFocusReason)
        
    def __toggleTerminal(self):
        """
        Private slot to handle the toggle of the Terminal window .
        """
        hasFocus = self.terminal.hasFocus()
        if self.layout == "DockWindows":
            shown = self.__toggleWindow(self.terminalDock)
        else:
            shown = self.__toggleWindow(self.terminal)
        if shown:
            self.__activateTerminal()
        else:
            if hasFocus:
                self.__activateViewmanager()

    def __activateTerminal(self):
        """
        Private slot to handle the activation of the Terminal window.
        """
        if self.layout == "DockWindows":
            self.terminalDock.show()
            self.terminalDock.raise_()
        elif self.layout == "Toolboxes":
            self.hToolboxDock.show()
            self.hToolbox.setCurrentWidget(self.terminal)
        elif self.layout == "Sidebars":
            self.bottomSidebar.show()
            self.bottomSidebar.setCurrentWidget(self.terminal)
        else:
            self.terminal.show()
        self.terminal.setFocus(Qt.ActiveWindowFocusReason)
        
    def __toggleLogViewer(self):
        """
        Private slot to handle the toggle of the Log Viewer window.
        """
        hasFocus = self.logViewer.hasFocus()
        if self.layout == "DockWindows":
            shown = self.__toggleWindow(self.logViewerDock)
        else:
            shown = self.__toggleWindow(self.logViewer)
        if shown:
            self.__activateLogViewer()
        else:
            if hasFocus:
                self.__activateViewmanager()

    def __activateLogViewer(self):
        """
        Private slot to handle the activation of the Log Viewer.
        """
        if self.layout == "DockWindows":
            self.logViewerDock.show()
            self.logViewerDock.raise_()
        elif self.layout == "Toolboxes":
            self.hToolboxDock.show()
            self.hToolbox.setCurrentWidget(self.logViewer)
        elif self.layout == "Sidebars":
            self.bottomSidebar.show()
            self.bottomSidebar.setCurrentWidget(self.logViewer)
        else:
            self.logViewer.show()
        self.logViewer.setFocus(Qt.ActiveWindowFocusReason)
        
    def __toggleTaskViewer(self):
        """
        Private slot to handle the toggle of the Task Viewer window.
        """
        hasFocus = self.taskViewer.hasFocus()
        if self.layout == "DockWindows":
            shown = self.__toggleWindow(self.taskViewerDock)
        else:
            shown = self.__toggleWindow(self.taskViewer)
        if shown:
            self.__activateTaskViewer()
        else:
            if hasFocus:
                self.__activateViewmanager()

    def __activateTaskViewer(self):
        """
        Private slot to handle the activation of the Task Viewer.
        """
        if self.layout == "DockWindows":
            self.taskViewerDock.show()
            self.taskViewerDock.raise_()
        elif self.layout == "Toolboxes":
            self.hToolboxDock.show()
            self.hToolbox.setCurrentWidget(self.taskViewer)
        elif self.layout == "Sidebars":
            self.bottomSidebar.show()
            self.bottomSidebar.setCurrentWidget(self.taskViewer)
        else:
            self.taskViewer.show()
        self.taskViewer.setFocus(Qt.ActiveWindowFocusReason)
        
    def __toggleTemplateViewer(self):
        """
        Private slot to handle the toggle of the Template Viewer window.
        """
        hasFocus = self.templateViewer.hasFocus()
        if self.layout == "DockWindows":
            shown = self.__toggleWindow(self.templateViewerDock)
        else:
            shown = self.__toggleWindow(self.templateViewer)
        if shown:
            self.__activateTemplateViewer()
        else:
            if hasFocus:
                self.__activateViewmanager()

    def __activateTemplateViewer(self):
        """
        Private slot to handle the activation of the Template Viewer.
        """
        if self.layout == "DockWindows":
            self.templateViewerDock.show()
            self.templateViewerDock.raise_()
        elif self.layout == "Toolboxes":
            self.vToolboxDock.show()
            self.vToolbox.setCurrentWidget(self.templateViewer)
        elif self.layout == "Sidebars":
            self.leftSidebar.show()
            self.leftSidebar.setCurrentWidget(self.templateViewer)
        else:
            self.templateViewer.show()
        self.templateViewer.setFocus(Qt.ActiveWindowFocusReason)
        
    def __toggleBrowser(self):
        """
        Private slot to handle the toggle of the File Browser window.
        """
        hasFocus = self.browser.hasFocus()
        if self.layout == "DockWindows":
            shown = self.__toggleWindow(self.browserDock)
        else:
            shown = self.__toggleWindow(self.browser)
        if shown:
            self.__activateBrowser()
        else:
            if hasFocus:
                self.__activateViewmanager()

    def __activateBrowser(self):
        """
        Private slot to handle the activation of the file browser.
        """
        if self.embeddedFileBrowser == 0:   # separate window
            if self.layout == "DockWindows":
                self.browserDock.show()
                self.browserDock.raise_()
            elif self.layout == "Toolboxes":
                self.vToolboxDock.show()
                self.vToolbox.setCurrentWidget(self.browser)
            elif self.layout == "Sidebars":
                self.leftSidebar.show()
                self.leftSidebar.setCurrentWidget(self.browser)
            else:
                self.browser.show()
        elif self.embeddedFileBrowser == 1: # embedded in debug browser
            if self.layout in ["DockWindows", "Toolboxes", "Sidebars"]:
                self.debugViewerDock.show()
                self.debugViewerDock.raise_()
            else:
                self.debugViewer.show()
            self.debugViewer.setCurrentWidget(self.browser)
        else:                               # embedded in project browser
            if self.layout == "DockWindows":
                self.projectBrowserDock.show()
                self.projectBrowserDock.raise_()
            elif self.layout == "Toolboxes":
                self.vToolboxDock.show()
                self.vToolbox.setCurrentWidget(self.projectBrowser)
            elif self.layout == "Sidebars":
                self.leftSidebar.show()
                self.leftSidebar.setCurrentWidget(self.projectBrowser)
            else:
                self.projectBrowser.show()
            self.projectBrowser.setCurrentWidget(self.browser)
        self.browser.setFocus(Qt.ActiveWindowFocusReason)
        
    def __toggleVerticalToolbox(self):
        """
        Private slot to handle the toggle of the Vertical Toolbox window.
        """
        hasFocus = self.vToolbox.currentWidget().hasFocus()
        shown = self.__toggleWindow(self.vToolboxDock)
        if shown:
            self.vToolbox.currentWidget().setFocus(Qt.ActiveWindowFocusReason)
        else:
            if hasFocus:
                self.__activateViewmanager()
        
    def __toggleHorizontalToolbox(self):
        """
        Private slot to handle the toggle of the Horizontal Toolbox window.
        """
        hasFocus = self.hToolbox.currentWidget().hasFocus()
        shown = self.__toggleWindow(self.hToolboxDock)
        if shown:
            self.hToolbox.currentWidget().setFocus(Qt.ActiveWindowFocusReason)
        else:
            if hasFocus:
                self.__activateViewmanager()
        
    def __toggleLeftSidebar(self):
        """
        Private slot to handle the toggle of the left sidebar window.
        """
        hasFocus = self.leftSidebar.currentWidget().hasFocus()
        shown = self.__toggleWindow(self.leftSidebar)
        if shown:
            self.leftSidebar.currentWidget().setFocus(Qt.ActiveWindowFocusReason)
        else:
            if hasFocus:
                self.__activateViewmanager()
        
    def __toggleBottomSidebar(self):
        """
        Private slot to handle the toggle of the bottom sidebar window.
        """
        hasFocus = self.bottomSidebar.currentWidget().hasFocus()
        shown = self.__toggleWindow(self.bottomSidebar)
        if shown:
            self.bottomSidebar.currentWidget().setFocus(Qt.ActiveWindowFocusReason)
        else:
            if hasFocus:
                self.__activateViewmanager()
        
    def __toggleCooperationViewer(self):
        """
        Private slot to handle the toggle of the cooperation window.
        """
        hasFocus = self.cooperation.hasFocus()
        if self.layout in ["DockWindows", "Toolboxes", "Sidebars"]:
            shown = self.__toggleWindow(self.cooperationDock)
        else:
            shown = self.__toggleWindow(self.cooperation)
        if shown:
            self.__activateCooperationViewer()
        else:
            if hasFocus:
                self.__activateViewmanager()
        
    def __activateCooperationViewer(self):
        """
        Private slot to handle the activation of the cooperation window.
        """
        if self.layout in ["DockWindows", "Toolboxes", "Sidebars"]:
            self.cooperationDock.show()
            self.cooperationDock.raise_()
        else:
            self.cooperation.show()
        self.cooperation.setFocus(Qt.ActiveWindowFocusReason)
        
    def __toggleSymbolsViewer(self):
        """
        Private slot to handle the toggle of the Symbols Viewer window.
        """
        hasFocus = self.symbolsViewer.hasFocus()
        if self.layout == "DockWindows":
            shown = self.__toggleWindow(self.symbolsDock)
        else:
            shown = self.__toggleWindow(self.symbolsViewer)
        if shown:
            self.__activateSymbolsViewer()
        else:
            if hasFocus:
                self.__activateViewmanager()

    def __activateSymbolsViewer(self):
        """
        Private slot to handle the activation of the Symbols Viewer.
        """
        if self.layout == "DockWindows":
            self.symbolsDock.show()
            self.symbolsDock.raise_()
        elif self.layout == "Toolboxes":
            self.vToolboxDock.show()
            self.vToolbox.setCurrentWidget(self.symbolsViewer)
        elif self.layout == "Sidebars":
            self.leftSidebar.show()
            self.leftSidebar.setCurrentWidget(self.symbolsViewer)
        else:
            self.symbolsViewer.show()
        self.symbolsViewer.setFocus(Qt.ActiveWindowFocusReason)
        
    def __toggleNumbersViewer(self):
        """
        Private slot to handle the toggle of the Numbers Viewer window.
        """
        hasFocus = self.numbersViewer.hasFocus()
        if self.layout == "DockWindows":
            shown = self.__toggleWindow(self.numbersDock)
        else:
            shown = self.__toggleWindow(self.numbersViewer)
        if shown:
            self.__activateNumbersViewer()
        else:
            if hasFocus:
                self.__activateViewmanager()

    def __activateNumbersViewer(self):
        """
        Private slot to handle the activation of the Numbers Viewer.
        """
        if self.layout == "DockWindows":
            self.numbersDock.show()
            self.numbersDock.raise_()
        elif self.layout == "Toolboxes":
            self.vToolboxDock.show()
            self.vToolbox.setCurrentWidget(self.numbersViewer)
        elif self.layout == "Sidebars":
            self.bottomSidebar.show()
            self.bottomSidebar.setCurrentWidget(self.numbersViewer)
        else:
            self.numbersViewer.show()
        self.numbersViewer.setFocus(Qt.ActiveWindowFocusReason)
        
    def __activateViewmanager(self):
        """
        Private slot to handle the activation of the current editor.
        """
        aw = self.viewmanager.activeWindow()
        if aw is not None:
            aw.setFocus(Qt.ActiveWindowFocusReason)
    
    def __toggleWindow(self, w):
        """
        Private method to toggle a workspace editor window.
        
        @param w reference to the workspace editor window
        @return flag indicating, if the window was shown (boolean)
        """
        if w.isHidden():
            w.show()
            return True
        else:
            w.hide()
            return False
        
    def __toolsConfiguration(self):
        """
        Private slot to handle the tools configuration menu entry.
        """
        dlg = ToolConfigurationDialog(self.toolGroups[self.currentToolGroup][1], self)
        if dlg.exec_() == QDialog.Accepted:
            self.toolGroups[self.currentToolGroup][1] = dlg.getToollist()
            self.__updateExternalToolsActions()
        
    def __toolGroupsConfiguration(self):
        """
        Private slot to handle the tool groups configuration menu entry.
        """
        dlg = ToolGroupConfigurationDialog(self.toolGroups, self.currentToolGroup, self)
        if dlg.exec_() == QDialog.Accepted:
            self.toolGroups, self.currentToolGroup = dlg.getToolGroups()
        
    def __unittest(self):
        """
        Private slot for displaying the unittest dialog.
        """
        self.unittestDialog.show()
        self.unittestDialog.raise_()

    def __unittestScript(self, prog = None):
        """
        Private slot for displaying the unittest dialog and run the current script.
        
        @param prog the python program to be opened
        """
        if prog is None:
            aw = self.viewmanager.activeWindow()
            fn = aw.getFileName()
            tfn = Utilities.getTestFileName(fn)
            if os.path.exists(tfn):
                prog = tfn
            else:
                prog = fn
        
        self.unittestDialog.insertProg(prog)
        self.unittestDialog.show()
        self.unittestDialog.raise_()
        self.utRestartAct.setEnabled(True)
        
    def __unittestProject(self):
        """
        Private slot for displaying the unittest dialog and run the current project.
        """
        fn = self.project.getMainScript(True)
        if fn:
            tfn = Utilities.getTestFileName(fn)
            if os.path.exists(tfn):
                prog = tfn
            else:
                prog = fn
        else:
            E5MessageBox.critical(self,
                self.trUtf8("Unittest Project"),
                self.trUtf8("There is no main script defined for the"
                    " current project. Aborting"))
            return
        
        self.unittestDialog.insertProg(prog)
        self.unittestDialog.show()
        self.unittestDialog.raise_()
        self.utRestartAct.setEnabled(True)
        
    def __unittestRestart(self):
        """
        Private slot to display the unittest dialog and rerun the last test.
        """
        self.unittestDialog.show()
        self.unittestDialog.raise_()
        self.unittestDialog.on_startButton_clicked()
        
    def __designer(self, fn = None, version = 0):
        """
        Private slot to start the Qt-Designer executable.
        
        @param fn filename of the form to be opened
        @param version indication for the requested version (Qt 4) (integer)
        """
        if fn is not None and version == 0:
            # determine version from file, if not specified
            try:
                f = open(fn, "r", encoding = "utf-8")
                found = False
                while not found:
                    uiLine = f.readline()
                    found = uiLine.lower().startswith("<ui ")
                f.close()
                if uiLine.lower().find("version") == -1:
                    # it is an old version 3 UI file
                    version = 3
                else:
                    if uiLine.split('"')[1].startswith("4."):
                        version = 4
                    else:
                        version = 3
            except IOError:
                pass
        
        if version == 3:
            E5MessageBox.information(self,
                self.trUtf8("Qt 3 support"),
                self.trUtf8("""Qt v.3 is not supported by eric5."""))
            return

        args = []
        if fn is not None:
            try:
                if os.path.isfile(fn) and os.path.getsize(fn):
                    args.append(fn)
                else:
                    E5MessageBox.critical(self,
                        self.trUtf8('Problem'),
                        self.trUtf8('<p>The file <b>{0}</b> does not exist or'
                            ' is zero length.</p>')
                            .format(fn))
                    return
            except EnvironmentError:
                E5MessageBox.critical(self,
                    self.trUtf8('Problem'),
                    self.trUtf8('<p>The file <b>{0}</b> does not exist or'
                        ' is zero length.</p>')
                        .format(fn))
                return
        
        if sys.platform == "darwin":
            designer, args = Utilities.prepareQtMacBundle("designer", version, args)
        else:
            if version == 4:
                designer = Utilities.generateQtToolName("designer")
            if Utilities.isWindowsPlatform():
                designer = designer + '.exe'
        
        proc = QProcess()
        if not proc.startDetached(designer, args):
            E5MessageBox.critical(self,
                self.trUtf8('Process Generation Error'),
                self.trUtf8(
                    '<p>Could not start Qt-Designer.<br>'
                    'Ensure that it is available as <b>{0}</b>.</p>'
                ).format(designer))
        
    def __designer4(self):
        """
        Private slot to start the Qt-Designer 4 executable.
        """
        self.__designer(version = 4)
        
    def __linguist(self, fn = None, version = 0):
        """
        Private slot to start the Qt-Linguist executable.
        
        @param fn filename of the translation file to be opened
        @param version indication for the requested version (Qt 4) (integer)
        """
        if version < 4:
            E5MessageBox.information(self,
                self.trUtf8("Qt 3 support"),
                self.trUtf8("""Qt v.3 is not supported by eric5."""))
            return

        args = []
        if fn is not None:
            fn = fn.replace('.qm', '.ts')
            try:
                if os.path.isfile(fn) and os.path.getsize(fn) and fn not in args:
                    args.append(fn)
                else:
                    E5MessageBox.critical(self,
                        self.trUtf8('Problem'),
                        self.trUtf8('<p>The file <b>{0}</b> does not exist or'
                            ' is zero length.</p>')
                            .format(fn))
                    return
            except EnvironmentError:
                E5MessageBox.critical(self,
                    self.trUtf8('Problem'),
                    self.trUtf8('<p>The file <b>{0}</b> does not exist or'
                        ' is zero length.</p>')
                        .format(fn))
                return
        
        if sys.platform == "darwin":
            linguist, args = Utilities.prepareQtMacBundle("linguist", version, args)
        else:
            if version == 4:
                linguist = Utilities.generateQtToolName("linguist")
            if Utilities.isWindowsPlatform():
                linguist = linguist + '.exe'
        
        proc = QProcess()
        if not proc.startDetached(linguist, args):
            E5MessageBox.critical(self,
                self.trUtf8('Process Generation Error'),
                self.trUtf8(
                    '<p>Could not start Qt-Linguist.<br>'
                    'Ensure that it is available as <b>{0}</b>.</p>'
                ).format(linguist))

    def __linguist4(self, fn = None):
        """
        Private slot to start the Qt-Linguist 4 executable.
        
        @param fn filename of the translation file to be opened
        """
        self.__linguist(fn, version = 4)

    def __assistant(self, home = None, version = 0):
        """
        Private slot to start the Qt-Assistant executable.
        
        @param home full pathname of a file to display (string)
        @param version indication for the requested version (Qt 4) (integer)
        """
        if version < 4:
            E5MessageBox.information(self,
                self.trUtf8("Qt 3 support"),
                self.trUtf8("""Qt v.3 is not supported by eric5."""))
            return

        args = []
        if home:
            if version == 4:
                args.append('-showUrl')
            args.append(home)
        
        if sys.platform == "darwin":
            assistant, args = Utilities.prepareQtMacBundle("assistant", version, args)
        else:
            if version == 4:
                assistant = Utilities.generateQtToolName("assistant")
            if Utilities.isWindowsPlatform():
                assistant = assistant + '.exe'
        
        proc = QProcess()
        if not proc.startDetached(assistant, args):
            E5MessageBox.critical(self,
                self.trUtf8('Process Generation Error'),
                self.trUtf8(
                    '<p>Could not start Qt-Assistant.<br>'
                    'Ensure that it is available as <b>{0}</b>.</p>'
                ).format(assistant))
        
    def __assistant4(self):
        """
        Private slot to start the Qt-Assistant 4 executable.
        """
        self.__assistant(version = 4)
    
    def __startWebBrowser(self, home = ""):
        """
        Private slot to start the eric5 web browser.
        
        @param home full pathname of a file to display (string)
        """
        self.launchHelpViewer(home)
        
    def __customViewer(self, home = None):
        """
        Private slot to start a custom viewer.
        
        @param home full pathname of a file to display (string)
        """
        customViewer = Preferences.getHelp("CustomViewer")
        if not customViewer:
            E5MessageBox.information(self,
                self.trUtf8("Help"),
                self.trUtf8("""Currently no custom viewer is selected."""
                            """ Please use the preferences dialog to specify one."""))
            return
            
        proc = QProcess()
        args = []
        if home:
            args.append(home)
        
        if not proc.startDetached(customViewer, args):
            E5MessageBox.critical(self,
                self.trUtf8('Process Generation Error'),
                self.trUtf8(
                    '<p>Could not start custom viewer.<br>'
                    'Ensure that it is available as <b>{0}</b>.</p>'
                ).format(customViewer))
        
    def __chmViewer(self, home=None):
        """
        Private slot to start the win help viewer to show *.chm files.
        
        @param home full pathname of a file to display (string)
        """
        if home:
            proc = QProcess()
            args = []
            args.append(home)
            
            if not proc.startDetached("hh", args):
                E5MessageBox.critical(self,
                    self.trUtf8('Process Generation Error'),
                    self.trUtf8(
                        '<p>Could not start the help viewer.<br>'
                        'Ensure that it is available as <b>hh</b>.</p>'
                    ))
        
    def __UIPreviewer(self,fn=None):
        """
        Private slot to start the UI Previewer executable.
        
        @param fn filename of the form to be previewed (string)
        """
        proc = QProcess()
        
        viewer = os.path.join(getConfig("ericDir"), "eric5-uipreviewer.py")
        
        args = []
        args.append(viewer)
        
        if fn is not None:
            try:
                if os.path.isfile(fn) and os.path.getsize(fn):
                    args.append(fn)
                else:
                    E5MessageBox.critical(self,
                        self.trUtf8('Problem'),
                        self.trUtf8('<p>The file <b>{0}</b> does not exist or'
                            ' is zero length.</p>')
                            .format(fn))
                    return
            except EnvironmentError:
                E5MessageBox.critical(self,
                    self.trUtf8('Problem'),
                    self.trUtf8('<p>The file <b>{0}</b> does not exist or'
                        ' is zero length.</p>')
                        .format(fn))
                return
                
        if not os.path.isfile(viewer) or not proc.startDetached(sys.executable, args):
            E5MessageBox.critical(self,
                self.trUtf8('Process Generation Error'),
                self.trUtf8(
                    '<p>Could not start UI Previewer.<br>'
                    'Ensure that it is available as <b>{0}</b>.</p>'
                ).format(viewer))
        
    def __TRPreviewer(self, fileNames = None, ignore = False):
        """
        Private slot to start the Translation Previewer executable.
        
        @param fileNames filenames of forms and/or translations to be previewed
            (list of strings)
        @param ignore flag indicating non existing files should be ignored (boolean)
        """
        proc = QProcess()
        
        viewer = os.path.join(getConfig("ericDir"), "eric5-trpreviewer.py")
        
        args = []
        args.append(viewer)
        
        if fileNames is not None:
            for fn in fileNames:
                try:
                    if os.path.isfile(fn) and os.path.getsize(fn):
                        args.append(fn)
                    else:
                        if not ignore:
                            E5MessageBox.critical(self,
                                self.trUtf8('Problem'),
                                self.trUtf8('<p>The file <b>{0}</b> does not exist or'
                                    ' is zero length.</p>')
                                    .format(fn))
                            return
                except EnvironmentError:
                    if not ignore:
                        E5MessageBox.critical(self,
                            self.trUtf8('Problem'),
                            self.trUtf8('<p>The file <b>{0}</b> does not exist or'
                                ' is zero length.</p>')
                                .format(fn))
                        return
        
        if not os.path.isfile(viewer) or not proc.startDetached(sys.executable, args):
            E5MessageBox.critical(self,
                self.trUtf8('Process Generation Error'),
                self.trUtf8(
                    '<p>Could not start Translation Previewer.<br>'
                    'Ensure that it is available as <b>{0}</b>.</p>'
                ).format(viewer))
        
    def __sqlBrowser(self):
        """
        Private slot to start the SQL browser tool.
        """
        proc = QProcess()
        
        browser = os.path.join(getConfig("ericDir"), "eric5-sqlbrowser.py")
        
        args = []
        args.append(browser)
        
        if not os.path.isfile(browser) or not proc.startDetached(sys.executable, args):
            E5MessageBox.critical(self,
                self.trUtf8('Process Generation Error'),
                self.trUtf8(
                    '<p>Could not start SQL Browser.<br>'
                    'Ensure that it is available as <b>{0}</b>.</p>'
                ).format(browser))
        
    def __editPixmap(self, fn = ""):
        """
        Private slot to show a pixmap in a dialog.
        
        @param fn filename of the file to show (string)
        """
        dlg = IconEditorWindow(fn, self, fromEric = True)
        dlg.show()
        
    def __showPixmap(self, fn):
        """
        Private slot to show a pixmap in a dialog.
        
        @param fn filename of the file to show (string)
        """
        dlg = PixmapDiagram(fn, self)
        if dlg.getStatus():
            dlg.show()
        
    def __showSvg(self, fn):
        """
        Private slot to show a SVG file in a dialog.
        
        @param fn filename of the file to show (string)
        """
        dlg = SvgDiagram(fn, self)
        dlg.show()
        
    def __toolActionTriggered(self):
        """
        Private slot called by external tools toolbar actions.
        """
        act = self.sender()
        toolGroupName, toolMenuText = act.objectName().split('@@', 1)
        for toolGroup in self.toolGroups:
            if toolGroup[0] == toolGroupName:
                for tool in toolGroup[1]:
                    if tool['menutext'] == toolMenuText:
                        self.__startToolProcess(tool)
                        return
                
                E5MessageBox.information(self,
                    self.trUtf8("External Tools"),
                    self.trUtf8("""No tool entry found for external tool '{0}' """
                        """in tool group '{1}'.""").format(toolMenuText, toolGroupName))
                return
        
        E5MessageBox.information(self,
            self.trUtf8("External Tools"),
            self.trUtf8("""No toolgroup entry '{0}' found.""").format(toolGroupName))
    
    def __toolExecute(self, act):
        """
        Private slot to execute a particular tool.
        
        @param act reference to the action that was triggered (QAction)
        """
        if self.toolGroupsMenuTriggered:
            # ignore actions triggered from the select tool group submenu
            self.toolGroupsMenuTriggered = False
            return
        
        if self.currentToolGroup < 0:
            # it was a built in or plugin tool, don't handle it here
            return
        
        idx = act.data()
        if idx is not None and idx >= 0:
            tool = self.toolGroups[self.currentToolGroup][1][idx]
            self.__startToolProcess(tool)
    
    def __startToolProcess(self, tool):
        """
        Private slot to start an external tool process.
        
        @param tool list of tool entries
        """
        proc = QProcess()
        procData = (None,)
        program = tool['executable']
        args = []
        argv = Utilities.parseOptionString(tool['arguments'])
        args.extend(argv)
        t = self.trUtf8("Starting process '{0} {1}'.\n")\
            .format(program, tool['arguments'])
        self.appendToStdout(t)
        
        proc.finished.connect(self.__toolFinished)
        if tool['redirect'] != 'no':
            proc.readyReadStandardOutput.connect(self.__processToolStdout)
            proc.readyReadStandardError.connect(self.__processToolStderr)
            if tool['redirect'] in ["insert", "replaceSelection"]:
                aw = self.viewmanager.activeWindow()
                procData = (aw, tool['redirect'], [])
                if aw is not None:
                    aw.beginUndoAction()
        
        proc.start(program, args)
        if not proc.waitForStarted():
            E5MessageBox.critical(self,
                self.trUtf8('Process Generation Error'),
                self.trUtf8(
                    '<p>Could not start the tool entry <b>{0}</b>.<br>'
                    'Ensure that it is available as <b>{1}</b>.</p>')\
                .format(tool['menutext'], tool['executable']))
        else:
            self.toolProcs.append((program, proc, procData))
            if tool['redirect'] == 'no':
                proc.closeReadChannel(QProcess.StandardOutput)
                proc.closeReadChannel(QProcess.StandardError)
                proc.closeWriteChannel()
        
    def __processToolStdout(self):
        """
        Private slot to handle the readyReadStdout signal of a tool process.
        """
        ioEncoding = Preferences.getSystem("IOEncoding")
        
        # loop through all running tool processes
        for program, toolProc, toolProcData in self.toolProcs:
            toolProc.setReadChannel(QProcess.StandardOutput)
            
            if toolProcData[0] is None or \
               toolProcData[1] not in ["insert", "replaceSelection"]: 
                # not connected to an editor or wrong mode
                while toolProc.canReadLine():
                    s = "{0} - ".format(program)
                    output = str(toolProc.readLine(), ioEncoding, 'replace')
                    s.append(output)
                    self.appendToStdout(s)
            else:
                if toolProcData[1] == "insert":
                    text = str(toolProc.readAll(), ioEncoding, 'replace')
                    toolProcData[0].insert(text)
                elif toolProcData[1] == "replaceSelection":
                    text = str(toolProc.readAll(), ioEncoding, 'replace')
                    toolProcData[2].append(text)
        
    def __processToolStderr(self):
        """
        Private slot to handle the readyReadStderr signal of a tool process.
        """
        ioEncoding = Preferences.getSystem("IOEncoding")
        
        # loop through all running tool processes
        for program, toolProc, toolProcData in self.toolProcs:
            toolProc.setReadChannel(QProcess.StandardError)
            
            while toolProc.canReadLine():
                s = "{0} - ".format(program)
                error = str(toolProc.readLine(), ioEncoding, 'replace')
                s.append(error)
                self.appendToStderr(s)
        
    def __toolFinished(self, exitCode, exitStatus):
        """
        Private slot to handle the finished signal of a tool process.
        
        @param exitCode exit code of the process (integer)
        @param exitStatus exit status of the process (QProcess.ExitStatus)
        """
        exitedProcs = []
        
        # loop through all running tool processes
        for program, toolProc, toolProcData in self.toolProcs:
            if toolProc.state() == QProcess.NotRunning:
                exitedProcs.append((program, toolProc, toolProcData))
                if toolProcData[0] is not None:
                    if toolProcData[1] == "replaceSelection":
                        text = ''.join(toolProcData[2])
                        toolProcData[0].replace(text)
                    toolProcData[0].endUndoAction()
        
        # now delete the exited procs from the list of running processes
        for proc in exitedProcs:
            self.toolProcs.remove(proc)
            t = self.trUtf8("Process '{0}' has exited.\n").format(proc[0])
            self.appendToStdout(t)
    
    def __showPythonDoc(self):
        """
        Private slot to show the Python documentation.
        """
        pythonDocDir = Preferences.getHelp("PythonDocDir")
        if not pythonDocDir:
            if Utilities.isWindowsPlatform():
                pythonDocDir = Utilities.getEnvironmentEntry("PYTHONDOCDIR", 
                    os.path.join(os.path.dirname(sys.executable), "doc"))
            else:
                pythonDocDir = Utilities.getEnvironmentEntry("PYTHONDOCDIR", 
                    '/usr/share/doc/packages/python/html')
        if not pythonDocDir.startswith("http://") and \
           not pythonDocDir.startswith("https://"):
            if pythonDocDir.startswith("file://"):
                pythonDocDir = pythonDocDir[7:]
            if not os.path.splitext(pythonDocDir)[1]:
                home = Utilities.normjoinpath(pythonDocDir, 'index.html')
                
                if Utilities.isWindowsPlatform() and not os.path.exists(home):
                    pyversion = sys.hexversion >> 16
                    vers = "{0:d}{1:d}".format((pyversion >> 8) & 0xff, pyversion & 0xff)
                    home = os.path.join(pythonDocDir, "python{0}.chm".format(vers))
            else:
                home = pythonDocDir
            
            if not os.path.exists(home):
                E5MessageBox.warning(self,
                    self.trUtf8("Documentation Missing"),
                    self.trUtf8("""<p>The documentation starting point"""
                                """ "<b>{0}</b>" could not be found.</p>""")\
                        .format(home))
                return
            
            if not home.endswith(".chm"):
                if Utilities.isWindowsPlatform():
                    home = "file:///" + Utilities.fromNativeSeparators(home)
                else:
                    home = "file://" + home
        else:
            home = pythonDocDir
        
        if home.endswith(".chm"):
            self.__chmViewer(home)
        else:
            hvType = Preferences.getHelp("HelpViewerType")
            if hvType == 1:
                self.launchHelpViewer(home)
            elif hvType == 2:
                self.__assistant(home, version = 4)
            elif hvType == 3:
                self.__webBrowser(home)
            else:
                self.__customViewer(home)

    def __showQt4Doc(self):
        """
        Private slot to show the Qt4 documentation.
        """
        qt4DocDir = Preferences.getHelp("Qt4DocDir")
        if not qt4DocDir:
            qt4DocDir = Utilities.getEnvironmentEntry("QT4DOCDIR", "")
        
        if qt4DocDir.startswith("qthelp://"):
            if not os.path.splitext(qt4DocDir)[1]:
                home = qt4DocDir + "/index.html"
            else:
                home = qt4DocDir
        elif qt4DocDir.startswith("http://") or qt4DocDir.startswith("https://"):
            home = qt4DocDir
        else:
            if qt4DocDir.startswith("file://"):
                qt4DocDir = qt4DocDir[7:]
            if not os.path.splitext(qt4DocDir)[1]:
                home = Utilities.normjoinpath(qt4DocDir, 'index.html')
            else:
                home = qt4DocDir
            
            if not os.path.exists(home):
                E5MessageBox.warning(self,
                    self.trUtf8("Documentation Missing"),
                    self.trUtf8("""<p>The documentation starting point"""
                                """ "<b>{0}</b>" could not be found.</p>""")\
                        .format(home))
                return
            
            if Utilities.isWindowsPlatform():
                home = "file:///" + Utilities.fromNativeSeparators(home)
            else:
                home = "file://" + home
        
        hvType = Preferences.getHelp("HelpViewerType")
        if hvType == 1:
            self.launchHelpViewer(home)
        elif hvType == 2:
            self.__assistant(home, version = 4)
        elif hvType == 3:
            self.__webBrowser(home)
        else:
            self.__customViewer(home)
        
    def __showPyQt4Doc(self):
        """
        Private slot to show the PyQt4 documentation.
        """
        pyqt4DocDir = Preferences.getHelp("PyQt4DocDir")
        if not pyqt4DocDir:
            pyqt4DocDir = Utilities.getEnvironmentEntry("PYQT4DOCDIR", None)
        
        if not pyqt4DocDir:
            E5MessageBox.warning(self,
                self.trUtf8("Documentation"),
                self.trUtf8("""<p>The PyQt4 documentation starting point"""
                            """ has not been configured.</p>"""))
            return
        
        if not pyqt4DocDir.startswith("http://") and \
           not pyqt4DocDir.startswith("https://"):
            home = ""
            if pyqt4DocDir:
                if pyqt4DocDir.startswith("file://"):
                    pyqt4DocDir = pyqt4DocDir[7:]
                if not os.path.splitext(pyqt4DocDir)[1]:
                    possibleHomes = [\
                        Utilities.normjoinpath(pyqt4DocDir, 'index.html'),
                        Utilities.normjoinpath(pyqt4DocDir, 'pyqt4ref.html'),
                        Utilities.normjoinpath(pyqt4DocDir, 'classes.html'),
                    ]
                    for possibleHome in possibleHomes:
                        if os.path.exists(possibleHome):
                            home = possibleHome
                            break
                else:
                    home = pyqt4DocDir
            
            if not home or not os.path.exists(home):
                E5MessageBox.warning(self,
                    self.trUtf8("Documentation Missing"),
                    self.trUtf8("""<p>The documentation starting point"""
                                """ "<b>{0}</b>" could not be found.</p>""")\
                        .format(home))
                return
            
            if Utilities.isWindowsPlatform():
                home = "file:///" + Utilities.fromNativeSeparators(home)
            else:
                home = "file://" + home
        else:
            home = pyqt4DocDir
        
        hvType = Preferences.getHelp("HelpViewerType")
        if hvType == 1:
            self.launchHelpViewer(home)
        elif hvType == 2:
            self.__assistant(home, version = 4)
        elif hvType == 3:
            self.__webBrowser(home)
        else:
            self.__customViewer(home)
        
    def __showEricDoc(self):
        """
        Private slot to show the Eric documentation.
        """
        home = Utilities.normjoinpath(getConfig('ericDocDir'),
            "Source", "index.html")
        
        if not home.startswith("http://") and \
           not home.startswith("https://"):
            if not os.path.exists(home):
                E5MessageBox.warning(self,
                    self.trUtf8("Documentation Missing"),
                    self.trUtf8("""<p>The documentation starting point"""
                                """ "<b>{0}</b>" could not be found.</p>""")\
                        .format(home))
                return
        
        if Utilities.isWindowsPlatform():
            home = "file:///" + Utilities.fromNativeSeparators(home)
        else:
            home = "file://" + home
        
        hvType = Preferences.getHelp("HelpViewerType")
        if hvType == 1:
            self.launchHelpViewer(home)
        elif hvType == 2:
            self.__assistant(home, version = 4)
        elif hvType == 3:
            self.__webBrowser(home)
        else:
            self.__customViewer(home)
        
    def __showPySideDoc(self):
        """
        Private slot to show the PySide documentation.
        """
        pysideDocDir = Preferences.getHelp("PySideDocDir")
        if not pysideDocDir:
            pysideDocDir = Utilities.getEnvironmentEntry("PYSIDEDOCDIR", None)
        
        if not pysideDocDir:
            E5MessageBox.warning(self,
                self.trUtf8("Documentation"),
                self.trUtf8("""<p>The PySide documentation starting point"""
                            """ has not been configured.</p>"""))
            return
        
        if not pysideDocDir.startswith("http://") and \
           not pysideDocDir.startswith("https://"):
            if pysideDocDir.startswith("file://"):
                pysideDocDir = pysideDocDir[7:]
            if not os.path.splitext(pysideDocDir)[1]:
                home = Utilities.normjoinpath(pysideDocDir, 'index.html')
            else:
                home = pysideDocDir
            if not os.path.exists(home):
                E5MessageBox.warning(self,
                    self.trUtf8("Documentation Missing"),
                    self.trUtf8("""<p>The documentation starting point"""
                                """ "<b>{0}</b>" could not be found.</p>""")\
                        .format(home))
                return
            
            if Utilities.isWindowsPlatform():
                home = "file:///" + Utilities.fromNativeSeparators(home)
            else:
                home = "file://" + home
        else:
            home = pysideDocDir
        
        hvType = Preferences.getHelp("HelpViewerType")
        if hvType == 1:
            self.launchHelpViewer(home)
        elif hvType == 2:
            self.__assistant(home, version = 4)
        elif hvType == 3:
            self.__webBrowser(home)
        else:
            self.__customViewer(home)
        
    def launchHelpViewer(self, home, searchWord = None):
        """
        Public slot to start the help viewer.
        
        @param home filename of file to be shown (string)
        @keyparam searchWord word to search for (string)
        """
        if len(home) > 0:
            homeUrl = QUrl(home)
            if not homeUrl.scheme():
                home = QUrl.fromLocalFile(home).toString()
        if not Preferences.getHelp("SingleHelpWindow") or self.helpWindow is None:
            help = HelpWindow(home, '.', None, 'help viewer', True, 
                              searchWord = searchWord)

            if QApplication.desktop().width() > 400 and \
               QApplication.desktop().height() > 500:
                help.show()
            else:
                help.showMaximized()
            
            if Preferences.getHelp("SingleHelpWindow"):
                self.helpWindow = help
                self.helpWindow.helpClosed.connect(self.__helpClosed)
                self.preferencesChanged.connect(self.helpWindow.preferencesChanged)
        elif searchWord is not None:
            self.helpWindow.search(searchWord)
            self.helpWindow.raise_()
        else:
            self.helpWindow.newTab(home)
            self.helpWindow.raise_()
    
    def __helpClosed(self):
        """
        Private slot to handle the helpClosed signal of the help window.
        """
        if Preferences.getHelp("SingleHelpWindow"):
            self.preferencesChanged.disconnect(self.helpWindow.preferencesChanged)
            self.helpWindow = None
    
    def __helpViewer(self):
        """
        Private slot to start an empty help viewer.
        """
        searchWord = self.viewmanager.textForFind(False)
        if searchWord == "":
            searchWord = None
        
        self.launchHelpViewer("", searchWord = searchWord)
    
    def __webBrowser(self):
        """
        Private slot to start the eric5 web browser.
        """
        self.launchHelpViewer("")

    def showPreferences(self, pageName = None):
        """
        Public slot to set the preferences.
        
        @param pageName name of the configuration page to show (string)
        """
        dlg = ConfigurationDialog(self, 'Configuration', True)
        dlg.preferencesChanged.connect(self.__preferencesChanged)
        dlg.show()
        if pageName is not None:
            dlg.showConfigurationPageByName(pageName)
        else:
            dlg.showConfigurationPageByName("empty")
        dlg.exec_()
        QApplication.processEvents()
        if dlg.result() == QDialog.Accepted:
            dlg.setPreferences()
            Preferences.syncPreferences()
            self.__preferencesChanged()
        
    def __exportPreferences(self):
        """
        Private slot to export the current preferences.
        """
        Preferences.exportPreferences()
        
    def __importPreferences(self):
        """
        Private slot to import preferences.
        """
        Preferences.importPreferences()
        self.__preferencesChanged()
        
    def __preferencesChanged(self):
        """
        Private slot to handle a change of the preferences.
        """
        self.__setStyle()
        
        if Preferences.getUI("SingleApplicationMode"):
            if self.SAServer is None:
                self.SAServer = E5SingleApplicationServer()
        else:
            if self.SAServer is not None:
                self.SAServer.shutdown()
                self.SAServer = None
        
        self.maxEditorPathLen = Preferences.getUI("CaptionFilenameLength")
        self.captionShowsFilename = Preferences.getUI("CaptionShowsFilename")
        if not self.captionShowsFilename:
            self.__setWindowCaption(editor = "")
        else:
            aw = self.viewmanager.activeWindow()
            fn = aw and aw.getFileName() or None
            if fn:
                self.__setWindowCaption(editor = fn)
            else:
                self.__setWindowCaption(editor = "")
        
        self.__httpAlternatives = Preferences.getUI("VersionsUrls5")
        self.performVersionCheck(False)
        
        self.__configureDockareaCornerUsage()
        
        SpellChecker.setDefaultLanguage(
            Preferences.getEditor("SpellCheckingDefaultLanguage"))
        
        self.preferencesChanged.emit()
        
    def __reloadAPIs(self):
        """
        Private slot to reload the api information.
        """
        self.reloadAPIs.emit()
        
    def __showExternalTools(self):
        """
        Private slot to display a dialog show a list of external tools used by eric5.
        """
        self.programsDialog.show()
        
    def __configViewProfiles(self):
        """
        Private slot to configure the various view profiles.
        """
        dlg = ViewProfileDialog(self.layout, self.profiles,
            not self.embeddedShell, not self.embeddedFileBrowser)
        if dlg.exec_() == QDialog.Accepted:
            self.profiles = dlg.getProfiles()
            Preferences.setUI("ViewProfiles", self.profiles)
            if self.currentProfile == "edit":
                self.__setEditProfile(False)
            elif self.currentProfile == "debug":
                self.setDebugProfile(False)
        
    def __configToolBars(self):
        """
        Private slot to configure the various toolbars.
        """
        dlg = E5ToolBarDialog(self.toolbarManager)
        if dlg.exec_() == QDialog.Accepted:
            Preferences.setUI("ToolbarManagerState", self.toolbarManager.saveState())
        
    def __configShortcuts(self):
        """
        Private slot to configure the keyboard shortcuts.
        """
        self.shortcutsDialog.populate()
        self.shortcutsDialog.show()
        
    def __exportShortcuts(self):
        """
        Private slot to export the keyboard shortcuts.
        """
        fn, selectedFilter = QFileDialog.getSaveFileNameAndFilter(
            None,
            self.trUtf8("Export Keyboard Shortcuts"),
            "",
            self.trUtf8("Keyboard shortcut file (*.e4k)"),
            "",
            QFileDialog.Options(QFileDialog.DontConfirmOverwrite))
        
        if not fn:
            return
        
        ext = QFileInfo(fn).suffix()
        if not ext:
            ex = selectedFilter.split("(*")[1].split(")")[0]
            if ex:
                fn += ex
        
        Shortcuts.exportShortcuts(fn)

    def __importShortcuts(self):
        """
        Private slot to import the keyboard shortcuts.
        """
        fn = QFileDialog.getOpenFileName(
            None,
            self.trUtf8("Import Keyboard Shortcuts"),
            "",
            self.trUtf8("Keyboard shortcut file (*.e4k)"))
        
        if fn:
            Shortcuts.importShortcuts(fn)

    def __newProject(self):
        """
        Private slot to handle the NewProject signal.
        """
        self.__setWindowCaption(project = self.project.name)
        
    def __projectOpened(self):
        """
        Private slot to handle the projectOpened signal.
        """
        self.__setWindowCaption(project = self.project.name)
        cap = e5App().getObject("DebugServer")\
            .getClientCapabilities(self.project.pdata["PROGLANGUAGE"][0])
        self.utProjectAct.setEnabled(cap & HasUnittest)
        self.utProjectOpen = cap & HasUnittest
        
    def __projectClosed(self):
        """
        Private slot to handle the projectClosed signal.
        """
        self.__setWindowCaption(project = "")
        self.utProjectAct.setEnabled(False)
        if not self.utEditorOpen:
            self.utRestartAct.setEnabled(False)
        self.utProjectOpen = False
        
    def __programChange(self, fn):
        """
        Private slot to handle the programChange signal.
        
        This primarily is here to set the currentProg variable.
        
        @param fn filename to be set as current prog (string)
        """
        # Delete the old program if there was one.
        if self.currentProg is not None:
            del self.currentProg

        self.currentProg = os.path.normpath(fn)
        
    def __lastEditorClosed(self):
        """
        Private slot to handle the lastEditorClosed signal.
        """
        self.wizardsMenuAct.setEnabled(False)
        self.utScriptAct.setEnabled(False)
        self.utEditorOpen = False
        if not self.utProjectOpen:
            self.utRestartAct.setEnabled(False)
        self.__setWindowCaption(editor = "")
        
    def __editorOpened(self, fn):
        """
        Private slot to handle the editorOpened signal.
        
        @param fn filename of the opened editor (string)
        """
        self.wizardsMenuAct.setEnabled(len(self.__menus["wizards"].actions()) > 0)
        
        if fn and str(fn) != "None":
            dbs = e5App().getObject("DebugServer")
            for language in dbs.getSupportedLanguages():
                exts = dbs.getExtensions(language)
                if fn.endswith(exts):
                    cap = dbs.getClientCapabilities(language)
                    self.utScriptAct.setEnabled(cap & HasUnittest)
                    self.utEditorOpen = cap & HasUnittest
                    return
            
            if self.viewmanager.getOpenEditor(fn).isPyFile() or \
               self.viewmanager.getOpenEditor(fn).isPy3File():
                self.utScriptAct.setEnabled(True)
                self.utEditorOpen = True
        
    def __checkActions(self, editor):
        """
        Private slot to check some actions for their enable/disable status.
        
        @param editor editor window
        """
        if editor:
            fn = editor.getFileName()
        else:
            fn = None
            
        if fn:
            dbs = e5App().getObject("DebugServer")
            for language in dbs.getSupportedLanguages():
                exts = dbs.getExtensions(language)
                if fn.endswith(exts):
                    cap = dbs.getClientCapabilities(language)
                    self.utScriptAct.setEnabled(cap & HasUnittest)
                    self.utEditorOpen = cap & HasUnittest
                    return
            
            if editor.isPyFile() or editor.isPy3File():
                self.utScriptAct.setEnabled(True)
                self.utEditorOpen = True
                return
        
        self.utScriptAct.setEnabled(False)
    
    def __writeTasks(self):
        """
        Private slot to write the tasks data to an XML file (.e4t).
        """
        fn = os.path.join(Utilities.getConfigDir(), "eric5tasks.e4t")
        f = QFile(fn)
        ok = f.open(QIODevice.WriteOnly)
        if not ok:
            E5MessageBox.critical(self,
                self.trUtf8("Save tasks"),
                self.trUtf8("<p>The tasks file <b>{0}</b> could not be written.</p>")
                    .format(fn))
            return
        
        TasksWriter(f, False).writeXML()
        f.close()
        
    def __readTasks(self):
        """
        Private slot to read in the tasks file (.e4t)
        """
        fn = os.path.join(Utilities.getConfigDir(), "eric5tasks.e4t")
        if not os.path.exists(fn):
            return
        f = QFile(fn)
        if f.open(QIODevice.ReadOnly):
            reader = TasksReader(f, viewer = self.taskViewer)
            reader.readXML()
            f.close()
        else:
            E5MessageBox.critical(self,
                self.trUtf8("Read tasks"),
                self.trUtf8("<p>The tasks file <b>{0}</b> could not be read.</p>")
                    .format(fn))
        
    def __writeSession(self):
        """
        Private slot to write the session data to an XML file (.e4s).
        """
        fn = os.path.join(Utilities.getConfigDir(), "eric5session.e4s")
        f = QFile(fn)
        if f.open(QIODevice.WriteOnly):
            SessionWriter(f, None).writeXML()
            f.close()
        else:
            E5MessageBox.critical(self,
                self.trUtf8("Save session"),
                self.trUtf8("<p>The session file <b>{0}</b> could not be written.</p>")
                    .format(fn))
        
    def __readSession(self):
        """
        Private slot to read in the session file (.e4s)
        """
        fn = os.path.join(Utilities.getConfigDir(), "eric5session.e4s")
        if not os.path.exists(fn):
            E5MessageBox.critical(self,
                self.trUtf8("Read session"),
                self.trUtf8("<p>The session file <b>{0}</b> could not be read.</p>")\
                    .format(fn))
            return
        
        f = QFile(fn)
        if f.open(QIODevice.ReadOnly):
            reader = SessionReader(f, True)
            reader.readXML()
            f.close()
        else:
            E5MessageBox.critical(self,
                self.trUtf8("Read session"),
                self.trUtf8("<p>The session file <b>{0}</b> could not be read.</p>")\
                    .format(fn))
    
    ##########################################################
    ## Below are slots to handle StdOut and StdErr
    ##########################################################
    
    def appendToStdout(self, s):
        """
        Public slot to append text to the stdout log viewer tab.
        
        @param s output to be appended (string)
        """
        self.showLogTab("stdout")
        self.appendStdout.emit(s)
    
    def appendToStderr(self, s):
        """
        Public slot to append text to the stderr log viewer tab.
        
        @param s output to be appended (string)
        """
        self.showLogTab("stderr")
        self.appendStderr.emit(s)
    
    ##########################################################
    ## Below are slots needed by the plugin menu
    ##########################################################
    
    def __showPluginInfo(self):
        """
        Private slot to show the plugin info dialog.
        """
        self.__pluginInfoDialog = PluginInfoDialog(self.pluginManager, self)
        self.__pluginInfoDialog.show()
        
    def __installPlugins(self, pluginFileNames = []):
        """
        Private slot to show a dialog to install a new plugin.
        
        @param pluginFileNames list of plugin files suggested for 
            installation list of strings
        """
        dlg = PluginInstallDialog(self.pluginManager, pluginFileNames, self)
        dlg.exec_()
        if dlg.restartNeeded():
            self.__restart()
        
    def __deinstallPlugin(self):
        """
        Private slot to show a dialog to uninstall a plugin.
        """
        dlg = PluginUninstallDialog(self.pluginManager, self)
        dlg.exec_()
        
    def __showPluginsAvailable(self):
        """
        Private slot to show the plugins available for download.
        """
        dlg = PluginRepositoryDialog(self)
        res = dlg.exec_()
        if res == (QDialog.Accepted + 1):
            self.__installPlugins(dlg.getDownloadedPlugins())
        
    def __pluginsConfigure(self):
        """
        Private slot to show the plugin manager configuration page.
        """
        self.showPreferences("pluginManagerPage")
    
    #################################################################
    ## Drag and Drop Support
    #################################################################
    
    def dragEnterEvent(self, event):
        """
        Protected method to handle the drag enter event.
        
        @param event the drag enter event (QDragEnterEvent)
        """
        self.inDragDrop = event.mimeData().hasUrls()
        if self.inDragDrop:
            event.acceptProposedAction()
        
    def dragMoveEvent(self, event):
        """
        Protected method to handle the drag move event.
        
        @param event the drag move event (QDragMoveEvent)
        """
        if self.inDragDrop:
            event.acceptProposedAction()
        
    def dragLeaveEvent(self, event):
        """
        Protected method to handle the drag leave event.
        
        @param event the drag leave event (QDragLeaveEvent)
        """
        if self.inDragDrop:
            self.inDragDrop = False
        
    def dropEvent(self, event):
        """
        Protected method to handle the drop event.
        
        @param event the drop event (QDropEvent)
        """
        if event.mimeData().hasUrls():
            event.acceptProposedAction()
            for url in event.mimeData().urls():
                fname = url.toLocalFile()
                if fname:
                    if QFileInfo(fname).isFile():
                        self.viewmanager.openSourceFile(fname)
                    else:
                        E5MessageBox.information(self,
                            self.trUtf8("Drop Error"),
                            self.trUtf8("""<p><b>{0}</b> is not a file.</p>""")
                                .format(fname))
        
        self.inDragDrop = False
    
    ##########################################################
    ## Below are methods needed for shutting down the IDE
    ##########################################################

    def closeEvent(self, event):
        """
        Private event handler for the close event.
        
        This event handler saves the preferences.
        
        @param event close event (QCloseEvent)
        """
        if self.__shutdown():
            event.accept()
            if not self.inCloseEevent:
                self.inCloseEevent = True
                QTimer.singleShot(0, e5App().closeAllWindows)
        else:
            event.ignore()

    def __shutdown(self):
        """
        Private method to perform all necessary steps to close down the IDE.
        
        @return flag indicating success
        """
        if self.shutdownCalled:
            return True
        
        self.__writeSession()
        
        if not self.project.closeProject():
            return False
        
        if not self.multiProject.closeMultiProject():
            return False
        
        if not self.viewmanager.closeViewManager():
            return False
        
        self.shell.closeShell()
        self.terminal.closeTerminal()
        
        self.__writeTasks()
        self.templateViewer.writeTemplates()
        
        if not self.debuggerUI.shutdownServer():
            return False
        self.debuggerUI.shutdown()
        
        self.pluginManager.doShutdown()
        
        if self.SAServer is not None:
            self.SAServer.shutdown()
            self.SAServer = None
        
        Preferences.setGeometry("MainMaximized", self.isMaximized())
        if not self.isMaximized():
            Preferences.setGeometry("MainGeometry", self.saveGeometry())
        if self.layout == "FloatingWindows":      # floating windows
            windows = {
                "ProjectBrowser": self.projectBrowser,
                "DebugViewer": self.debugViewer,
                "LogViewer": self.logViewer,
                "Shell": self.shell,
                "FileBrowser" : self.browser,
                "TaskViewer" : self.taskViewer,
                "TemplateViewer" : self.templateViewer,
                "MultiProjectBrowser": self.multiProjectBrowser,
            }
            if self.embeddedShell:
                del windows["Shell"]
            if self.embeddedFileBrowser:
                del windows["FileBrowser"]
            for window, i in zip(self.windows, list(range(len(self.windows)))):
                if window is not None:
                    self.profiles[self.currentProfile][2][i] = \
                        bytes(window.saveGeometry())

        self.browser.saveToplevelDirs()
        
        Preferences.setUI("ToolbarManagerState", self.toolbarManager.saveState())
        self.__saveCurrentViewProfile(True)
        Preferences.saveToolGroups(self.toolGroups, self.currentToolGroup)
        Preferences.syncPreferences()
        self.shutdownCalled = True
        return True

    ##############################################
    ## Below are methods to check for new versions
    ##############################################

    def showAvailableVersionsInfo(self):
        """
        Public method to show the eric5 versions available for download.
        """
        self.performVersionCheck(manual = True, showVersions = True)
        
    def performVersionCheck(self, manual = True,  alternative = 0, showVersions = False):
        """
        Public method to check the internet for an eric5 update.
        
        @param manual flag indicating an invocation via the menu (boolean)
        @param alternative index of server to download from (integer)
        @keyparam showVersion flag indicating the show versions mode (boolean)
        """
        if not manual:
            if Version.startswith("@@"):
                return
            else:
                period = Preferences.getUI("PerformVersionCheck")
                if period == 0:
                    return
                elif period in [2, 3, 4]:
                    lastCheck = Preferences.Prefs.settings.value(
                        "Updates/LastCheckDate", QDate(1970, 1, 1))
                    if lastCheck.isValid():
                        now = QDate.currentDate()
                        if period == 2 and lastCheck.day() == now.day():
                            # daily
                            return
                        elif period == 3 and lastCheck.daysTo(now) < 7:
                            # weekly
                            return
                        elif period == 4 and lastCheck.month() == now.month():
                            # monthly
                            return
        
        self.__inVersionCheck = True
        self.manualUpdatesCheck = manual
        self.showAvailableVersions = showVersions
        self.httpAlternative = alternative
        url = QUrl(self.__httpAlternatives[alternative])
        self.__versionCheckCanceled = False
        if manual:
            if self.__versionCheckProgress is None:
                self.__versionCheckProgress = \
                    QProgressDialog("", self.trUtf8("&Cancel"),  
                                     0,  len(self.__httpAlternatives),  self)
                self.__versionCheckProgress.setMinimumDuration(0)
                self.__versionCheckProgress.canceled.connect(
                    self.__versionsDownloadCanceled)
            self.__versionCheckProgress.setLabelText(
                self.trUtf8("Trying host {0}").format(url.host()))
            self.__versionCheckProgress.setValue(alternative)
        reply = self.__networkManager.get(QNetworkRequest(url))
        reply.finished[()].connect(self.__versionsDownloadDone)
        self.__replies.append(reply)
        
    def __versionsDownloadDone(self):
        """
        Private method called, after the versions file has been downloaded
        from the internet.
        """
        if self.__versionCheckCanceled:
            self.__inVersionCheck = False
            if self.__versionCheckProgress is not None:
                self.__versionCheckProgress.reset()
                self.__versionCheckProgress = None
            return
        
        reply = self.sender()
        if reply in self.__replies:
            self.__replies.remove(reply)
        if reply.error() != QNetworkReply.NoError:
            self.httpAlternative += 1
            if self.httpAlternative >= len(self.__httpAlternatives):
                self.__inVersionCheck = False
                if self.__versionCheckProgress is not None:
                    self.__versionCheckProgress.reset()
                    self.__versionCheckProgress = None
                E5MessageBox.warning(self,
                    self.trUtf8("Error downloading versions file"),
                    self.trUtf8("""Could not download the versions file."""))
                return
            else:
                self.performVersionCheck(self.manualUpdatesCheck, self.httpAlternative, 
                    self.showAvailableVersions)
                return
        
        self.__inVersionCheck = False
        if self.__versionCheckProgress is not None:
            self.__versionCheckProgress.reset()
            self.__versionCheckProgress = None
        ioEncoding = Preferences.getSystem("IOEncoding")
        versions = str(reply.readAll(), ioEncoding, 'replace').splitlines()
        self.__updateVersionsUrls(versions)
        if self.showAvailableVersions:
            self.__showAvailableVersionInfos(versions)
        else:
            Preferences.Prefs.settings.setValue(
                "Updates/LastCheckDate", QDate.currentDate())
            self.__versionCheckResult(versions)
        
    def __updateVersionsUrls(self, versions):
        """
        Private method to update the URLs from which to retrieve the versions file.
        
        @param versions contents of the downloaded versions file (list of strings)
        """
        if len(versions) > 5 and versions[4] == "---":
            line = 5
            urls = []
            while line < len(versions):
                urls.append(versions[line])
                line += 1
            
            Preferences.setUI("VersionsUrls5", urls)
        
    def __versionCheckResult(self, versions):
        """
        Private method to show the result of the version check action.
        
        @param versions contents of the downloaded versions file (list of strings)
        """
        url = ""
        try:
            if "-snapshot-" in Version:
                # check snapshot version
                if versions[2] > Version:
                    res = E5MessageBox.yesNo(self,
                        self.trUtf8("Update available"),
                        self.trUtf8("""The update to <b>{0}</b> of eric5 is available"""
                                    """ at <b>{1}</b>. Would you like to get it?""")\
                            .format(versions[2], versions[3]),
                        yesDefault = True)
                    url = res and versions[3] or ''
                elif versions[0] > Version:
                    res = E5MessageBox.yesNo(self,
                        self.trUtf8("Update available"),
                        self.trUtf8("""The update to <b>{0}</b> of eric5 is available"""
                                    """ at <b>{1}</b>. Would you like to get it?""")\
                            .format(versions[0], versions[1]),
                        yesDefault = True)
                    url = res and versions[1] or ''
                else:
                    if self.manualUpdatesCheck:
                        E5MessageBox.information(self,
                            self.trUtf8("Eric5 is up to date"),
                            self.trUtf8("""You are using the latest version of eric5"""))
            else:
                # check release version
                if versions[0] > Version:
                    res = E5MessageBox.yesNo(self,
                        self.trUtf8("Update available"),
                        self.trUtf8("""The update to <b>{0}</b> of eric5 is available"""
                                    """ at <b>{1}</b>. Would you like to get it?""")\
                            .format(versions[0], versions[1]),
                        yesDefault = True)
                    url = res and versions[1] or ''
                else:
                    if self.manualUpdatesCheck:
                        E5MessageBox.information(self,
                            self.trUtf8("Eric5 is up to date"),
                            self.trUtf8("""You are using the latest version of eric5"""))
        except IndexError:
            E5MessageBox.warning(self,
                self.trUtf8("Error during updates check"),
                self.trUtf8("""Could not perform updates check."""))
        
        if url:
            QDesktopServices.openUrl(QUrl(url))
        
    def __versionsDownloadCanceled(self):
        """
        Private method called to cancel the version check.
        """
        if self.http is not None:
            self.__versionCheckCanceled = True
            self.http.abort()
        
    def __showAvailableVersionInfos(self, versions):
        """
        Private method to show the versions available for download.
        
        @param versions contents of the downloaded versions file (list of strings)
        """
        versionText = self.trUtf8(
            """<h3>Available versions</h3>"""
            """<table>""")
        line = 0
        while line < len(versions):
            if versions[line] == "---":
                break
            
            versionText += """<tr><td>{0}</td><td><a href="{1}">{2}</a></td></tr>"""\
                .format(versions[line], versions[line + 1], 
                    'sourceforge' in versions[line + 1] and \
                        "SourceForge" or versions[line + 1])
            line += 2
        versionText += self.trUtf8("""</table>""")
        
        E5MessageBox.about(self, Program, versionText)
        
    def __sslErrors(self, reply, errors):
        """
        Private slot to handle SSL errors.
        
        @param reply reference to the reply object (QNetworkReply)
        @param errors list of SSL errors (list of QSslError)
        """
        errorStrings = []
        for err in sslErrors:
            errorStrings.append(err.errorString())
        errorString = '.<br />'.join(errorStrings)
        ret = E5MessageBox.yesNo(self,
            self.trUtf8("SSL Errors"),
            self.trUtf8("""<p>SSL Errors:</p>"""
                        """<p>{0}</p>"""
                        """<p>Do you want to ignore these errors?</p>""")\
                .format(errorString),
            icon = E5MessageBox.Warning)
        if ret:
            reply.ignoreSslErrors()
        else:
            self.__downloadCancelled = True
            reply.abort()
    
    #######################################
    ## Below are methods for various checks
    #######################################

    def checkConfigurationStatus(self):
        """
        Public method to check, if eric5 has been configured. If it is not, 
        the configuration dialog is shown.
        """
        if not Preferences.isConfigured():
            E5MessageBox.information(self,
                self.trUtf8("First time usage"),
                self.trUtf8("""eric5 has not been configured yet. """
                            """The configuration dialog will be started."""))
            self.showPreferences()
    
    def versionIsNewer(self, required, snapshot = None):
        """
        Public method to check, if the eric5 version is good compared to
        the required version.
        
        @param required required version (string)
        @param snapshot required snapshot version (string)
        @return flag indicating, that the version is newer than the required one
            (boolean)
        """
        if Version.startswith("@@"):
            # development version, always newer
            return True
        
        if "-snapshot-" in Version:
            # check snapshot version
            if snapshot is None:
                return True
            else:
                vers = Version.split("-snapshot-")[1]
                return vers.split()[0] > snapshot
        
        return Version.split()[0] > required
    
    #################################
    ## Below are some utility methods
    #################################

    def __getFloatingGeometry(self, w):
        """
        Private method to get the geometry of a floating windows.
        
        @param w reference to the widget to be saved (QWidget)
        @return list giving the widget's geometry and it's visibility
        """
        s = w.size()
        p = w.pos()
        return [p.x(), p.y(), s.width(), s.height(), not w.isHidden()]
    
    ############################
    ## some event handlers below
    ############################
    
    def showEvent(self, evt):
        """
        Protected method to handle the show event.
        
        @param evt reference to the show event (QShowEvent)
        """
        if self.__startup:
            if Preferences.getGeometry("MainMaximized"):
                self.setWindowState(Qt.WindowStates(Qt.WindowMaximized))
            self.__startup = False