Mercurial Repositories > eric / file diff

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Helpviewer/HelpTabBar.py	Sun Sep 19 14:00:57 2010 +0200
@@ -0,0 +1,162 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2010 Detlev Offenbach <detlev@die-offenbachs.de>
+#
+
+"""
+Module implementing a specialized tab bar for the web browser.
+"""
+
+from PyQt4.QtCore import Qt, QPoint, QTimer, QEvent
+from PyQt4.QtGui import QFrame, QLabel
+
+from E5Gui.E5TabWidget import E5WheelTabBar
+from E5Gui.E5PassivePopup import E5PassivePopup
+
+from .HelpSnap import renderTabPreview
+
+import Preferences
+
+class HelpTabBar(E5WheelTabBar):
+    """
+    Class implementing the tab bar of the web browser.
+    """
+    def __init__(self, parent = None):
+        """
+        Constructor
+        
+        @param parent reference to the parent widget (QWidget)
+        """
+        E5WheelTabBar.__init__(self, parent)
+        
+        self.__helpWindow = parent
+        
+        self.__previewPopup = None
+        self.__currentTabPreviewIndex = -1
+        
+        self.setMouseTracking(True)
+    
+    def __showTabPreview(self):
+        """
+        Private slot to show the tab preview.
+        """
+        indexedBrowser = self.__helpWindow.browserAt(self.__currentTabPreviewIndex)
+        currentBrowser = self.__helpWindow.currentBrowser()
+        
+        if indexedBrowser is None or currentBrowser is None:
+            return
+        
+        # no previews during load
+        if indexedBrowser.progress() != 0:
+            return
+        
+        w = self.tabSizeHint(self.__currentTabPreviewIndex).width()
+        h = int(w * currentBrowser.height() / currentBrowser.width())
+        
+        self.__previewPopup = E5PassivePopup(self)
+        self.__previewPopup.setFrameShape(QFrame.StyledPanel)
+        self.__previewPopup.setFrameShadow(QFrame.Plain)
+        self.__previewPopup.setFixedSize(w, h)
+        
+        l = QLabel()
+        l.setPixmap(renderTabPreview(indexedBrowser.page(), w, h))
+        
+        self.__previewPopup.setView(l)
+        self.__previewPopup.layout().setAlignment(Qt.AlignTop)
+        self.__previewPopup.layout().setMargin(0)
+        
+        tr = self.tabRect(self.__currentTabPreviewIndex)
+        pos = QPoint(tr.x(), tr.y() + tr.height())
+        
+        self.__previewPopup.show(self.mapToGlobal(pos))
+    
+    def mouseMoveEvent(self, evt):
+        """
+        Protected method to handle mouse move events.
+        
+        @param reference to the mouse move event (QMouseEvent)
+        """
+        if self.count() == 1:
+            return
+        
+        E5WheelTabBar.mouseMoveEvent(self, evt)
+        
+        if Preferences.getHelp("ShowPreview"):
+            # Find the tab under the mouse
+            i = 0
+            tabIndex = -1
+            while i < self.count() and tabIndex == -1:
+                if self.tabRect(i).contains(evt.pos()):
+                    tabIndex = i
+                i += 1
+            
+            # If found and not the current tab then show tab preview
+            if tabIndex != -1 and \
+               tabIndex != self.currentIndex() and \
+               self.__currentTabPreviewIndex != tabIndex and \
+               evt.buttons() == Qt.NoButton:
+                self.__currentTabPreviewIndex = tabIndex
+                QTimer.singleShot(200, self.__showTabPreview)
+            
+            # If current tab or not found then hide previous tab preview
+            if tabIndex == self.currentIndex() or \
+               tabIndex == -1:
+                if self.__previewPopup is not None:
+                    self.__previewPopup.hide()
+                self.__currentTabPreviewIndex = -1
+    
+    def leaveEvent(self, evt):
+        """
+        Protected method to handle leave events.
+        
+        @param evt reference to the leave event (QEvent)
+        """
+        if Preferences.getHelp("ShowPreview"):
+            # If leave tabwidget then hide previous tab preview
+            if self.__previewPopup is not None:
+                self.__previewPopup.hide()
+            self.__currentTabPreviewIndex = -1
+        
+        E5WheelTabBar.leaveEvent(self, evt)
+    
+    def mousePressEvent(self, evt):
+        """
+        Protected method to handle mouse press events.
+        
+        @param evt reference to the mouse press event (QMouseEvent)
+        """
+        if Preferences.getHelp("ShowPreview"):
+            if self.__previewPopup is not None:
+                self.__previewPopup.hide()
+            self.__currentTabPreviewIndex = -1
+        
+        E5WheelTabBar.mousePressEvent(self, evt)
+    
+    def event(self, evt):
+        """
+        Protected method to handle event.
+        
+        This event handler just handles the tooltip event and passes the 
+        handling of all others to the superclass.
+        
+        @param evt reference to the event to be handled (QEvent)
+        @return flag indicating, if the event was handled (boolean)
+        """
+        if evt.type() == QEvent.ToolTip and \
+           Preferences.getHelp("ShowPreview"):
+            # suppress tool tips if we are showing previews
+            evt.setAccepted(True)
+            return True
+        
+        return E5WheelTabBar.event(self, evt)
+    
+    def tabRemoved(self, index):
+        """
+        Protected slot to handle the removal of a tab.
+        
+        @param index index of the removed tab (integer)
+        """
+        if Preferences.getHelp("ShowPreview"):
+            if self.__previewPopup is not None:
+                self.__previewPopup.hide()
+            self.__currentTabPreviewIndex = -1