Helpviewer/HelpSearchWidget.py

Wed, 01 Jan 2014 14:38:45 +0100

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Wed, 01 Jan 2014 14:38:45 +0100
changeset 3160
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parent 2302
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child 3178
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child 3190
a9a94491c4fd
permissions
-rw-r--r--

Updated copyright for 2014.

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1 # -*- coding: utf-8 -*-
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2
3160
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3 # Copyright (c) 2009 - 2014 Detlev Offenbach <detlev@die-offenbachs.de>
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4 #
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5
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6 """
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7 Module implementing a window for showing the QtHelp index.
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8 """
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9
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10 from PyQt4.QtCore import pyqtSignal, Qt, QEvent, QUrl
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11 from PyQt4.QtGui import QWidget, QVBoxLayout, QTextBrowser, QApplication, QMenu
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12
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13
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14 class HelpSearchWidget(QWidget):
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15 """
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16 Class implementing a window for showing the QtHelp index.
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17
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18 @signal linkActivated(QUrl) emitted when a search result entry is activated
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19 @signal escapePressed() emitted when the ESC key was pressed
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20 """
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21 linkActivated = pyqtSignal(QUrl)
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22 escapePressed = pyqtSignal()
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23
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24 def __init__(self, engine, mainWindow, parent=None):
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25 """
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26 Constructor
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27
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28 @param engine reference to the help search engine (QHelpSearchEngine)
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29 @param mainWindow reference to the main window object (QMainWindow)
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30 @param parent reference to the parent widget (QWidget)
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31 """
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32 super().__init__(parent)
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33
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34 self.__engine = engine
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35 self.__mw = mainWindow
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36
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37 self.__layout = QVBoxLayout(self)
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38
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39 self.__result = self.__engine.resultWidget()
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40 self.__query = self.__engine.queryWidget()
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41
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42 self.__layout.addWidget(self.__query)
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43 self.__layout.addWidget(self.__result)
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44
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45 self.setFocusProxy(self.__query)
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46
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47 self.__query.search.connect(self.__search)
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48 self.__result.requestShowLink.connect(self.linkActivated)
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49
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50 self.__engine.searchingStarted.connect(self.__searchingStarted)
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51 self.__engine.searchingFinished.connect(self.__searchingFinished)
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52
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53 self.__browser = self.__result.findChildren(QTextBrowser)[0]
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54 if self.__browser:
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55 self.__browser.viewport().installEventFilter(self)
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56
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57 def __search(self):
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58 """
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59 Private slot to perform a search of the database.
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60 """
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61 query = self.__query.query()
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62 self.__engine.search(query)
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63
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64 def __searchingStarted(self):
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65 """
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66 Private slot to handle the start of a search.
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67 """
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68 QApplication.setOverrideCursor(Qt.WaitCursor)
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69
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70 def __searchingFinished(self, hits):
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71 """
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72 Private slot to handle the end of the search.
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73
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74 @param hits number of hits (integer) (unused)
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75 """
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76 QApplication.restoreOverrideCursor()
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77
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78 def eventFilter(self, watched, event):
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79 """
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80 Public method called to filter the event queue.
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81
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82 @param watched the QObject being watched (QObject)
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83 @param event the event that occurred (QEvent)
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84 @return flag indicating whether the event was handled (boolean)
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85 """
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86 if self.__browser and watched == self.__browser.viewport() and \
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87 event.type() == QEvent.MouseButtonRelease:
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88 link = self.__result.linkAt(event.pos())
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89 if not link.isEmpty() and link.isValid():
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90 ctrl = event.modifiers() & Qt.ControlModifier
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91 if (event.button() == Qt.LeftButton and ctrl) or \
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92 event.button() == Qt.MidButton:
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93 self.__mw.newTab(link)
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94
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95 return QWidget.eventFilter(self, watched, event)
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96
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97 def keyPressEvent(self, evt):
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98 """
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99 Protected method handling key press events.
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100
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101 @param evt reference to the key press event (QKeyEvent)
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102 """
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103 if evt.key() == Qt.Key_Escape:
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104 self.escapePressed.emit()
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105 else:
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106 evt.ignore()
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107
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108 def contextMenuEvent(self, evt):
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109 """
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110 Protected method handling context menu events.
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111
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112 @param evt reference to the context menu event (QContextMenuEvent)
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113 """
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114 point = evt.globalPos()
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115
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116 if self.__browser:
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117 point = self.__browser.mapFromGlobal(point)
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118 if not self.__browser.rect().contains(point, True):
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119 return
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120 link = QUrl(self.__browser.anchorAt(point))
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121 else:
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122 point = self.__result.mapFromGlobal(point)
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123 link = self.__result.linkAt(point)
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124
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125 if link.isEmpty() or not link.isValid():
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126 return
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127
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128 menu = QMenu()
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129 curTab = menu.addAction(self.trUtf8("Open Link"))
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130 newTab = menu.addAction(self.trUtf8("Open Link in New Tab"))
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131 menu.move(evt.globalPos())
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
132 act = menu.exec_()
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
133 if act == curTab:
487
4d41d03d3d00 Continued porting signal/slot usage to the new API.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 13
diff changeset
134 self.linkActivated.emit(link)
0
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
135 elif act == newTab:
487
4d41d03d3d00 Continued porting signal/slot usage to the new API.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 13
diff changeset
136 self.__mw.newTab(link)

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