eric6/WebBrowser/QtHelp/HelpTocWidget.py

Sat, 27 Feb 2021 12:08:23 +0100

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Sat, 27 Feb 2021 12:08:23 +0100
changeset 8138
169e65a6787c
parent 7923
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child 8143
2c730d5fd177
permissions
-rw-r--r--

Shell: added functionality to show a prompt when the main client process has exited (e.g. a script ended).

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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2009 - 2021 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 TOC.
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8 """
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9
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10 from PyQt5.QtCore import pyqtSignal, pyqtSlot, Qt, QUrl
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11 from PyQt5.QtWidgets import QWidget, QVBoxLayout, QMenu, QApplication
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12
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13
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14 class HelpTocWidget(QWidget):
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15 """
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16 Class implementing a window for showing the QtHelp TOC.
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17
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18 @signal escapePressed() emitted when the ESC key was pressed
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19 @signal openUrl(QUrl, str) emitted to open an entry in the current tab
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20 @signal newTab(QUrl, str) emitted to open an entry in a new tab
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21 @signal newBackgroundTab(QUrl, str) emitted to open an entry in a
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22 new background tab
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23 @signal newWindow(QUrl, str) emitted to open an entry in a new window
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24 """
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25 escapePressed = pyqtSignal()
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26 openUrl = pyqtSignal(QUrl)
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27 newTab = pyqtSignal(QUrl)
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28 newBackgroundTab = pyqtSignal(QUrl)
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29 newWindow = pyqtSignal(QUrl)
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30
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31 def __init__(self, engine, parent=None):
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32 """
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33 Constructor
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34
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35 @param engine reference to the help engine (QHelpEngine)
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36 @param parent reference to the parent widget (QWidget)
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37 """
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38 super(HelpTocWidget, self).__init__(parent)
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39
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40 self.__engine = engine
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41 self.__expandDepth = -2
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42
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43 self.__tocWidget = self.__engine.contentWidget()
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44 self.__tocWidget.setContextMenuPolicy(Qt.CustomContextMenu)
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45 self.__tocWidget.setSortingEnabled(True)
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46
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47 self.__layout = QVBoxLayout(self)
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48 self.__layout.addWidget(self.__tocWidget)
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49
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50 self.__tocWidget.customContextMenuRequested.connect(
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51 self.__showContextMenu)
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52 self.__tocWidget.linkActivated.connect(self.__linkActivated)
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53
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54 model = self.__tocWidget.model()
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55 model.contentsCreated.connect(self.__contentsCreated)
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56
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57 @pyqtSlot(QUrl)
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58 def __linkActivated(self, url):
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59 """
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60 Private slot handling the activation of an entry.
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61
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62 @param url URL of the activated entry
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63 @type QUrl
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64 """
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65 if not url.isEmpty() and url.isValid():
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66 buttons = QApplication.mouseButtons()
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67 modifiers = QApplication.keyboardModifiers()
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68
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69 if buttons & Qt.MidButton:
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70 self.newTab.emit(url)
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71 else:
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72 if (
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73 modifiers & (Qt.ControlModifier | Qt.ShiftModifier) ==
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74 (Qt.ControlModifier | Qt.ShiftModifier)
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75 ):
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76 self.newBackgroundTab.emit(url)
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77 elif modifiers & Qt.ControlModifier:
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78 self.newTab.emit(url)
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79 elif modifiers & Qt.ShiftModifier:
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80 self.newWindow.emit(url)
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81 else:
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82 self.openUrl.emit(url)
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83
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84 def __contentsCreated(self):
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85 """
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86 Private slot to be run after the contents was generated.
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87 """
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88 self.__tocWidget.sortByColumn(0, Qt.AscendingOrder)
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89 self.__expandTOC()
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90
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91 def __expandTOC(self):
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92 """
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93 Private slot to expand the table of contents.
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94 """
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95 if self.__expandDepth > -2:
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96 self.expandToDepth(self.__expandDepth)
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97 self.__expandDepth = -2
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98
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99 def expandToDepth(self, depth):
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100 """
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101 Public slot to expand the table of contents to a specific depth.
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102
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103 @param depth depth to expand to (integer)
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104 """
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105 self.__expandDepth = depth
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106 if depth == -1:
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107 self.__tocWidget.expandAll()
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108 else:
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109 self.__tocWidget.expandToDepth(depth)
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110
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111 def focusInEvent(self, evt):
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112 """
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113 Protected method handling focus in events.
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114
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115 @param evt reference to the focus event object (QFocusEvent)
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116 """
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117 if evt.reason() != Qt.MouseFocusReason:
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118 self.__tocWidget.setFocus()
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119
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120 def keyPressEvent(self, evt):
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121 """
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122 Protected method handling key press events.
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123
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124 @param evt reference to the key press event (QKeyEvent)
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125 """
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126 if evt.key() == Qt.Key_Escape:
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127 self.escapePressed.emit()
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128
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129 def syncToContent(self, url):
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130 """
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131 Public method to sync the TOC to the displayed page.
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132
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133 @param url URL of the displayed page (QUrl)
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134 @return flag indicating a successful synchronization (boolean)
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135 """
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136 idx = self.__tocWidget.indexOf(url)
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137 if not idx.isValid():
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138 return False
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139 self.__tocWidget.setCurrentIndex(idx)
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140 return True
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141
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142 def __showContextMenu(self, pos):
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143 """
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144 Private slot showing the context menu.
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145
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146 @param pos position to show the menu at (QPoint)
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147 """
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148 if not self.__tocWidget.indexAt(pos).isValid():
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149 return
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150
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151 model = self.__tocWidget.model()
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152 itm = model.contentItemAt(self.__tocWidget.currentIndex())
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153 link = itm.url()
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154 if link.isEmpty() or not link.isValid():
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155 return
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156
0
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157 menu = QMenu()
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158 curTab = menu.addAction(self.tr("Open Link"))
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159 newTab = menu.addAction(self.tr("Open Link in New Tab"))
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160 newBackgroundTab = menu.addAction(
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161 self.tr("Open Link in Background Tab"))
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162 newWindow = menu.addAction(self.tr("Open Link in New Window"))
0
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163 menu.move(self.__tocWidget.mapToGlobal(pos))
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164
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165 act = menu.exec()
0
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166 if act == curTab:
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167 self.openUrl.emit(link)
0
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168 elif act == newTab:
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169 self.newTab.emit(link)
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170 elif act == newBackgroundTab:
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171 self.newBackgroundTab.emit(link)
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172 elif act == newWindow:
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173 self.newWindow.emit(link)

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