Mercurial Repositories > eric / file comparison
comparison: eric6/Helpviewer/HelpTabBar.py
eric6/Helpviewer/HelpTabBar.py
- changeset 6942
- 2602857055c5
- parent 6645
- ad476851d7e0
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| 6941:f99d60d6b59b | 6942:2602857055c5 |
|---|---|
| 1 # -*- coding: utf-8 -*- | |
| 2 | |
| 3 # Copyright (c) 2010 - 2019 Detlev Offenbach <detlev@die-offenbachs.de> | |
| 4 # | |
| 5 | |
| 6 """ | |
| 7 Module implementing a specialized tab bar for the web browser. | |
| 8 """ | |
| 9 | |
| 10 from __future__ import unicode_literals | |
| 11 | |
| 12 from PyQt5.QtCore import Qt, QPoint, QTimer, QEvent | |
| 13 from PyQt5.QtWidgets import QFrame, QLabel | |
| 14 | |
| 15 from E5Gui.E5TabWidget import E5WheelTabBar | |
| 16 from E5Gui.E5PassivePopup import E5PassivePopup | |
| 17 | |
| 18 import Preferences | |
| 19 | |
| 20 | |
| 21 class HelpTabBar(E5WheelTabBar): | |
| 22 """ | |
| 23 Class implementing the tab bar of the web browser. | |
| 24 """ | |
| 25 def __init__(self, parent=None): | |
| 26 """ | |
| 27 Constructor | |
| 28 | |
| 29 @param parent reference to the parent widget (HelpTabWidget) | |
| 30 """ | |
| 31 E5WheelTabBar.__init__(self, parent) | |
| 32 | |
| 33 self.__tabWidget = parent | |
| 34 | |
| 35 self.__previewPopup = None | |
| 36 | |
| 37 self.setMouseTracking(True) | |
| 38 | |
| 39 def __showTabPreview(self, index): | |
| 40 """ | |
| 41 Private slot to show the tab preview. | |
| 42 | |
| 43 @param index index of tab to show a preview for | |
| 44 @type int | |
| 45 """ | |
| 46 indexedBrowser = self.__tabWidget.browserAt(index) | |
| 47 currentBrowser = self.__tabWidget.currentBrowser() | |
| 48 | |
| 49 if indexedBrowser is None or currentBrowser is None: | |
| 50 return | |
| 51 | |
| 52 # no previews during load | |
| 53 if indexedBrowser.progress() != 0: | |
| 54 return | |
| 55 | |
| 56 w = self.tabSizeHint(index).width() | |
| 57 h = int(w * currentBrowser.height() / currentBrowser.width()) | |
| 58 | |
| 59 self.__previewPopup = E5PassivePopup(self) | |
| 60 self.__previewPopup.setFrameShape(QFrame.StyledPanel) | |
| 61 self.__previewPopup.setFrameShadow(QFrame.Plain) | |
| 62 self.__previewPopup.setFixedSize(w, h) | |
| 63 self.__previewPopup.setCustomData("index", index) | |
| 64 | |
| 65 from .HelpSnap import renderTabPreview | |
| 66 label = QLabel() | |
| 67 label.setPixmap(renderTabPreview(indexedBrowser.page(), w, h)) | |
| 68 | |
| 69 self.__previewPopup.setView(label) | |
| 70 self.__previewPopup.layout().setAlignment(Qt.AlignTop) | |
| 71 self.__previewPopup.layout().setContentsMargins(0, 0, 0, 0) | |
| 72 | |
| 73 tr = self.tabRect(index) | |
| 74 pos = QPoint(tr.x(), tr.y() + tr.height()) | |
| 75 | |
| 76 self.__previewPopup.show(self.mapToGlobal(pos)) | |
| 77 | |
| 78 def __hidePreview(self): | |
| 79 """ | |
| 80 Private method to hide the preview. | |
| 81 """ | |
| 82 if self.__previewPopup is not None: | |
| 83 self.__previewPopup.hide() | |
| 84 self.__previewPopup = None | |
| 85 | |
| 86 def mouseMoveEvent(self, evt): | |
| 87 """ | |
| 88 Protected method to handle mouse move events. | |
| 89 | |
| 90 @param evt reference to the mouse move event (QMouseEvent) | |
| 91 """ | |
| 92 if self.count() == 1: | |
| 93 return | |
| 94 | |
| 95 E5WheelTabBar.mouseMoveEvent(self, evt) | |
| 96 | |
| 97 if Preferences.getHelp("ShowPreview"): | |
| 98 # Find the tab under the mouse | |
| 99 i = 0 | |
| 100 tabIndex = -1 | |
| 101 while i < self.count() and tabIndex == -1: | |
| 102 if self.tabRect(i).contains(evt.pos()): | |
| 103 tabIndex = i | |
| 104 i += 1 | |
| 105 | |
| 106 # If found and not the current tab then show tab preview | |
| 107 if tabIndex != -1 and \ | |
| 108 tabIndex != self.currentIndex() and \ | |
| 109 evt.buttons() == Qt.NoButton: | |
| 110 if self.__previewPopup is None or \ | |
| 111 (self.__previewPopup is not None and | |
| 112 self.__previewPopup.getCustomData("index") != tabIndex): | |
| 113 QTimer.singleShot( | |
| 114 0, lambda: self.__showTabPreview(tabIndex)) | |
| 115 | |
| 116 # If current tab or not found then hide previous tab preview | |
| 117 if tabIndex == self.currentIndex() or \ | |
| 118 tabIndex == -1: | |
| 119 self.__hidePreview() | |
| 120 | |
| 121 def leaveEvent(self, evt): | |
| 122 """ | |
| 123 Protected method to handle leave events. | |
| 124 | |
| 125 @param evt reference to the leave event (QEvent) | |
| 126 """ | |
| 127 if Preferences.getHelp("ShowPreview"): | |
| 128 # If leave tabwidget then hide previous tab preview | |
| 129 self.__hidePreview() | |
| 130 | |
| 131 E5WheelTabBar.leaveEvent(self, evt) | |
| 132 | |
| 133 def mousePressEvent(self, evt): | |
| 134 """ | |
| 135 Protected method to handle mouse press events. | |
| 136 | |
| 137 @param evt reference to the mouse press event (QMouseEvent) | |
| 138 """ | |
| 139 if Preferences.getHelp("ShowPreview"): | |
| 140 self.__hidePreview() | |
| 141 | |
| 142 E5WheelTabBar.mousePressEvent(self, evt) | |
| 143 | |
| 144 def event(self, evt): | |
| 145 """ | |
| 146 Public method to handle event. | |
| 147 | |
| 148 This event handler just handles the tooltip event and passes the | |
| 149 handling of all others to the superclass. | |
| 150 | |
| 151 @param evt reference to the event to be handled (QEvent) | |
| 152 @return flag indicating, if the event was handled (boolean) | |
| 153 """ | |
| 154 if evt.type() == QEvent.ToolTip and \ | |
| 155 Preferences.getHelp("ShowPreview"): | |
| 156 # suppress tool tips if we are showing previews | |
| 157 evt.setAccepted(True) | |
| 158 return True | |
| 159 | |
| 160 return E5WheelTabBar.event(self, evt) | |
| 161 | |
| 162 def tabRemoved(self, index): | |
| 163 """ | |
| 164 Public slot to handle the removal of a tab. | |
| 165 | |
| 166 @param index index of the removed tab (integer) | |
| 167 """ | |
| 168 if Preferences.getHelp("ShowPreview"): | |
| 169 self.__hidePreview() |
