Mercurial Repositories > eric / file comparison
comparison: Helpviewer/HelpTabBar.py
Helpviewer/HelpTabBar.py
- changeset 634
- 7b84cbd2f752
- child 638
- 265c31231d9d
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| 633:4bda1d24b8a7 | 634:7b84cbd2f752 |
|---|---|
| 1 # -*- coding: utf-8 -*- | |
| 2 | |
| 3 # Copyright (c) 2010 Detlev Offenbach <detlev@die-offenbachs.de> | |
| 4 # | |
| 5 | |
| 6 """ | |
| 7 Module implementing a specialized tab bar for the web browser. | |
| 8 """ | |
| 9 | |
| 10 from PyQt4.QtCore import Qt, QPoint, QTimer, QEvent | |
| 11 from PyQt4.QtGui import QFrame, QLabel | |
| 12 | |
| 13 from E5Gui.E5TabWidget import E5WheelTabBar | |
| 14 from E5Gui.E5PassivePopup import E5PassivePopup | |
| 15 | |
| 16 from .HelpSnap import renderTabPreview | |
| 17 | |
| 18 import Preferences | |
| 19 | |
| 20 class HelpTabBar(E5WheelTabBar): | |
| 21 """ | |
| 22 Class implementing the tab bar of the web browser. | |
| 23 """ | |
| 24 def __init__(self, parent = None): | |
| 25 """ | |
| 26 Constructor | |
| 27 | |
| 28 @param parent reference to the parent widget (QWidget) | |
| 29 """ | |
| 30 E5WheelTabBar.__init__(self, parent) | |
| 31 | |
| 32 self.__helpWindow = parent | |
| 33 | |
| 34 self.__previewPopup = None | |
| 35 self.__currentTabPreviewIndex = -1 | |
| 36 | |
| 37 self.setMouseTracking(True) | |
| 38 | |
| 39 def __showTabPreview(self): | |
| 40 """ | |
| 41 Private slot to show the tab preview. | |
| 42 """ | |
| 43 indexedBrowser = self.__helpWindow.browserAt(self.__currentTabPreviewIndex) | |
| 44 currentBrowser = self.__helpWindow.currentBrowser() | |
| 45 | |
| 46 if indexedBrowser is None or currentBrowser is None: | |
| 47 return | |
| 48 | |
| 49 # no previews during load | |
| 50 if indexedBrowser.progress() != 0: | |
| 51 return | |
| 52 | |
| 53 w = self.tabSizeHint(self.__currentTabPreviewIndex).width() | |
| 54 h = int(w * currentBrowser.height() / currentBrowser.width()) | |
| 55 | |
| 56 self.__previewPopup = E5PassivePopup(self) | |
| 57 self.__previewPopup.setFrameShape(QFrame.StyledPanel) | |
| 58 self.__previewPopup.setFrameShadow(QFrame.Plain) | |
| 59 self.__previewPopup.setFixedSize(w, h) | |
| 60 | |
| 61 l = QLabel() | |
| 62 l.setPixmap(renderTabPreview(indexedBrowser.page(), w, h)) | |
| 63 | |
| 64 self.__previewPopup.setView(l) | |
| 65 self.__previewPopup.layout().setAlignment(Qt.AlignTop) | |
| 66 self.__previewPopup.layout().setMargin(0) | |
| 67 | |
| 68 tr = self.tabRect(self.__currentTabPreviewIndex) | |
| 69 pos = QPoint(tr.x(), tr.y() + tr.height()) | |
| 70 | |
| 71 self.__previewPopup.show(self.mapToGlobal(pos)) | |
| 72 | |
| 73 def mouseMoveEvent(self, evt): | |
| 74 """ | |
| 75 Protected method to handle mouse move events. | |
| 76 | |
| 77 @param reference to the mouse move event (QMouseEvent) | |
| 78 """ | |
| 79 if self.count() == 1: | |
| 80 return | |
| 81 | |
| 82 E5WheelTabBar.mouseMoveEvent(self, evt) | |
| 83 | |
| 84 if Preferences.getHelp("ShowPreview"): | |
| 85 # Find the tab under the mouse | |
| 86 i = 0 | |
| 87 tabIndex = -1 | |
| 88 while i < self.count() and tabIndex == -1: | |
| 89 if self.tabRect(i).contains(evt.pos()): | |
| 90 tabIndex = i | |
| 91 i += 1 | |
| 92 | |
| 93 # If found and not the current tab then show tab preview | |
| 94 if tabIndex != -1 and \ | |
| 95 tabIndex != self.currentIndex() and \ | |
| 96 self.__currentTabPreviewIndex != tabIndex and \ | |
| 97 evt.buttons() == Qt.NoButton: | |
| 98 self.__currentTabPreviewIndex = tabIndex | |
| 99 QTimer.singleShot(200, self.__showTabPreview) | |
| 100 | |
| 101 # If current tab or not found then hide previous tab preview | |
| 102 if tabIndex == self.currentIndex() or \ | |
| 103 tabIndex == -1: | |
| 104 if self.__previewPopup is not None: | |
| 105 self.__previewPopup.hide() | |
| 106 self.__currentTabPreviewIndex = -1 | |
| 107 | |
| 108 def leaveEvent(self, evt): | |
| 109 """ | |
| 110 Protected method to handle leave events. | |
| 111 | |
| 112 @param evt reference to the leave event (QEvent) | |
| 113 """ | |
| 114 if Preferences.getHelp("ShowPreview"): | |
| 115 # If leave tabwidget then hide previous tab preview | |
| 116 if self.__previewPopup is not None: | |
| 117 self.__previewPopup.hide() | |
| 118 self.__currentTabPreviewIndex = -1 | |
| 119 | |
| 120 E5WheelTabBar.leaveEvent(self, evt) | |
| 121 | |
| 122 def mousePressEvent(self, evt): | |
| 123 """ | |
| 124 Protected method to handle mouse press events. | |
| 125 | |
| 126 @param evt reference to the mouse press event (QMouseEvent) | |
| 127 """ | |
| 128 if Preferences.getHelp("ShowPreview"): | |
| 129 if self.__previewPopup is not None: | |
| 130 self.__previewPopup.hide() | |
| 131 self.__currentTabPreviewIndex = -1 | |
| 132 | |
| 133 E5WheelTabBar.mousePressEvent(self, evt) | |
| 134 | |
| 135 def event(self, evt): | |
| 136 """ | |
| 137 Protected method to handle event. | |
| 138 | |
| 139 This event handler just handles the tooltip event and passes the | |
| 140 handling of all others to the superclass. | |
| 141 | |
| 142 @param evt reference to the event to be handled (QEvent) | |
| 143 @return flag indicating, if the event was handled (boolean) | |
| 144 """ | |
| 145 if evt.type() == QEvent.ToolTip and \ | |
| 146 Preferences.getHelp("ShowPreview"): | |
| 147 # suppress tool tips if we are showing previews | |
| 148 evt.setAccepted(True) | |
| 149 return True | |
| 150 | |
| 151 return E5WheelTabBar.event(self, evt) | |
| 152 | |
| 153 def tabRemoved(self, index): | |
| 154 """ | |
| 155 Protected slot to handle the removal of a tab. | |
| 156 | |
| 157 @param index index of the removed tab (integer) | |
| 158 """ | |
| 159 if Preferences.getHelp("ShowPreview"): | |
| 160 if self.__previewPopup is not None: | |
| 161 self.__previewPopup.hide() | |
| 162 self.__currentTabPreviewIndex = -1 |
