Helpviewer/HelpTocWidget.py

Mon, 25 Mar 2013 03:11:06 +0100

author
T.Rzepka <Tobias.Rzepka@gmail.com>
date
Mon, 25 Mar 2013 03:11:06 +0100
branch
Py2 comp.
changeset 2525
8b507a9a2d40
parent 2302
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child 3057
10516539f238
permissions
-rw-r--r--

Script changes: Future import added, super calls modified and unicode behavior for str.

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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2009 - 2013 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 __future__ import unicode_literals # __IGNORE_WARNING__
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11
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12 from PyQt4.QtCore import pyqtSignal, Qt, QEvent, QUrl
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13 from PyQt4.QtGui import QWidget, QVBoxLayout, QMenu
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14
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15
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16 class HelpTocWidget(QWidget):
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17 """
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18 Class implementing a window for showing the QtHelp TOC.
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19
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20 @signal linkActivated(QUrl) emitted when a TOC entry is activated
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21 @signal escapePressed() emitted when the ESC key was pressed
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22 """
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23 linkActivated = pyqtSignal(QUrl)
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24 escapePressed = pyqtSignal()
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26 def __init__(self, engine, mainWindow, parent=None):
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27 """
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28 Constructor
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29
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30 @param engine reference to the help engine (QHelpEngine)
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31 @param mainWindow reference to the main window object (QMainWindow)
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32 @param parent reference to the parent widget (QWidget)
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33 """
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34 super(HelpTocWidget, self).__init__(parent)
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35
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36 self.__engine = engine
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37 self.__mw = mainWindow
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38 self.__expandDepth = -2
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39
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40 self.__tocWidget = self.__engine.contentWidget()
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41 self.__tocWidget.viewport().installEventFilter(self)
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42 self.__tocWidget.setContextMenuPolicy(Qt.CustomContextMenu)
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43
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44 self.__layout = QVBoxLayout(self)
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45 self.__layout.addWidget(self.__tocWidget)
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46
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47 self.__tocWidget.customContextMenuRequested.connect(self.__showContextMenu)
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48 self.__tocWidget.linkActivated.connect(self.linkActivated)
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49
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50 model = self.__tocWidget.model()
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51 model.contentsCreated.connect(self.__expandTOC)
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52
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53 def __expandTOC(self):
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54 """
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55 Private slot to expand the table of contents.
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56 """
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57 if self.__expandDepth > -2:
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58 self.expandToDepth(self.__expandDepth)
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59 self.__expandDepth = -2
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60
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61 def expandToDepth(self, depth):
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62 """
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63 Public slot to expand the table of contents to a specific depth.
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64
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65 @param depth depth to expand to (integer)
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66 """
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67 self.__expandDepth = depth
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68 if depth == -1:
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69 self.__tocWidget.expandAll()
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70 else:
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71 self.__tocWidget.expandToDepth(depth)
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72
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73 def focusInEvent(self, evt):
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74 """
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75 Protected method handling focus in events.
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76
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77 @param evt reference to the focus event object (QFocusEvent)
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78 """
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79 if evt.reason() != Qt.MouseFocusReason:
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80 self.__tocWidget.setFocus()
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81
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82 def keyPressEvent(self, evt):
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83 """
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84 Protected method handling key press events.
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85
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86 @param evt reference to the key press event (QKeyEvent)
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87 """
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88 if evt.key() == Qt.Key_Escape:
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89 self.escapePressed.emit()
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90
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91 def eventFilter(self, watched, event):
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92 """
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93 Public method called to filter the event queue.
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94
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95 @param watched the QObject being watched (QObject)
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96 @param event the event that occurred (QEvent)
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97 @return flag indicating whether the event was handled (boolean)
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98 """
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99 if self.__tocWidget and watched == self.__tocWidget.viewport() and \
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100 event.type() == QEvent.MouseButtonRelease:
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101 if self.__tocWidget.indexAt(event.pos()).isValid() and \
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102 event.button() == Qt.LeftButton:
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103 self.itemClicked(self.__tocWidget.currentIndex())
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104 elif self.__tocWidget.indexAt(event.pos()).isValid() and \
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105 event.button() == Qt.MidButton:
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106 model = self.__tocWidget.model()
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107 itm = model.contentItemAt(self.__tocWidget.currentIndex())
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108 self.__mw.newTab(itm.url())
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109
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110 return QWidget.eventFilter(self, watched, event)
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111
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112 def itemClicked(self, index):
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113 """
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114 Public slot handling a click of a TOC entry.
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115
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116 @param index index of the TOC clicked (QModelIndex)
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117 """
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118 if not index.isValid():
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119 return
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120
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121 model = self.__tocWidget.model()
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122 itm = model.contentItemAt(index)
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123 if itm:
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124 self.linkActivated.emit(itm.url())
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125
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126 def syncToContent(self, url):
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127 """
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128 Public method to sync the TOC to the displayed page.
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129
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130 @param url URL of the displayed page (QUrl)
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131 @return flag indicating a successful synchronization (boolean)
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132 """
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133 idx = self.__tocWidget.indexOf(url)
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134 if not idx.isValid():
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135 return False
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136 self.__tocWidget.setCurrentIndex(idx)
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137 return True
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138
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139 def __showContextMenu(self, pos):
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140 """
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141 Private slot showing the context menu.
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142
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143 @param pos position to show the menu at (QPoint)
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144 """
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145 if not self.__tocWidget.indexAt(pos).isValid():
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146 return
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147
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148 menu = QMenu()
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149 curTab = menu.addAction(self.trUtf8("Open Link"))
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150 newTab = menu.addAction(self.trUtf8("Open Link in New Tab"))
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151 menu.move(self.__tocWidget.mapToGlobal(pos))
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152
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153 model = self.__tocWidget.model()
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154 itm = model.contentItemAt(self.__tocWidget.currentIndex())
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155
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156 act = menu.exec_()
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157 if act == curTab:
487
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158 self.linkActivated.emit(itm.url())
0
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159 elif act == newTab:
458
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160 self.__mw.newTab(itm.url())

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