Helpviewer/HelpTocWidget.py

Fri, 31 Dec 2010 15:49:50 +0100

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Fri, 31 Dec 2010 15:49:50 +0100
changeset 791
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parent 501
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child 945
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child 1510
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permissions
-rw-r--r--

Updated copyright notice.

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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2009 - 2011 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 PyQt4.QtCore import *
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11 from PyQt4.QtGui import *
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12
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13 class HelpTocWidget(QWidget):
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14 """
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15 Class implementing a window for showing the QtHelp TOC.
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16
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17 @signal linkActivated(QUrl) emitted when a TOC entry is activated
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18 @signal escapePressed() emitted when the ESC key was pressed
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19 """
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20 linkActivated = pyqtSignal(QUrl)
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21 escapePressed = pyqtSignal()
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22
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23 def __init__(self, engine, mainWindow, parent = None):
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24 """
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25 Constructor
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26
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27 @param engine reference to the help engine (QHelpEngine)
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28 @param mainWindow reference to the main window object (QMainWindow)
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29 @param parent reference to the parent widget (QWidget)
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30 """
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31 QWidget.__init__(self, parent)
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32
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33 self.__engine = engine
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34 self.__mw = mainWindow
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35 self.__expandDepth = -2
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36
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37 self.__tocWidget = self.__engine.contentWidget()
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38 self.__tocWidget.viewport().installEventFilter(self)
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39 self.__tocWidget.setContextMenuPolicy(Qt.CustomContextMenu)
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40
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41 self.__layout = QVBoxLayout(self)
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42 self.__layout.addWidget(self.__tocWidget)
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43
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44 self.__tocWidget.customContextMenuRequested.connect(self.__showContextMenu)
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45 self.__tocWidget.linkActivated.connect(self.linkActivated)
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46
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47 model = self.__tocWidget.model()
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48 model.contentsCreated.connect(self.__expandTOC)
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49
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50 def __expandTOC(self):
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51 """
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52 Private slot to expand the table of contents.
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53 """
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54 if self.__expandDepth > -2:
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55 self.expandToDepth(self.__expandDepth)
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56 self.__expandDepth = -2
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57
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58 def expandToDepth(self, depth):
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59 """
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60 Public slot to expand the table of contents to a specific depth.
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61
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62 @param depth depth to expand to (integer)
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63 """
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64 self.__expandDepth = depth
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65 if depth == -1:
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66 self.__tocWidget.expandAll()
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67 else:
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68 self.__tocWidget.expandToDepth(depth)
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69
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70 def focusInEvent(self, evt):
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71 """
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72 Protected method handling focus in events.
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73
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74 @param evt reference to the focus event object (QFocusEvent)
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75 """
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76 if evt.reason() != Qt.MouseFocusReason:
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77 self.__tocWidget.setFocus()
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78
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79 def keyPressEvent(self, evt):
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80 """
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81 Protected method handling key press events.
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82
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83 @param evt reference to the key press event (QKeyEvent)
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84 """
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85 if evt.key() == Qt.Key_Escape:
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86 self.escapePressed.emit()
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87
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88 def eventFilter(self, watched, event):
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89 """
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90 Public method called to filter the event queue.
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91
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92 @param watched the QObject being watched (QObject)
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93 @param event the event that occurred (QEvent)
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94 @return flag indicating whether the event was handled (boolean)
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95 """
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96 if self.__tocWidget and watched == self.__tocWidget.viewport() and \
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97 event.type() == QEvent.MouseButtonRelease:
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98 if self.__tocWidget.indexAt(event.pos()).isValid() and \
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99 event.button() == Qt.LeftButton:
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100 self.itemClicked(self.__tocWidget.currentIndex())
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101 elif self.__tocWidget.indexAt(event.pos()).isValid() and \
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102 event.button() == Qt.MidButton:
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103 model = self.__tocWidget.model()
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104 itm = model.contentItemAt(self.__tocWidget.currentIndex())
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105 self.__mw.newTab(itm.url())
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106
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107 return QWidget.eventFilter(self, watched, event)
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108
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109 def itemClicked(self, index):
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110 """
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111 Public slot handling a click of a TOC entry.
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112
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113 @param index index of the TOC clicked (QModelIndex)
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114 """
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115 if not index.isValid():
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116 return
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117
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118 model = self.__tocWidget.model()
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119 itm = model.contentItemAt(index)
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120 if itm:
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121 self.linkActivated.emit(itm.url())
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122
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123 def syncToContent(self, url):
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124 """
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125 Public method to sync the TOC to the displayed page.
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126
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127 @param url URL of the displayed page (QUrl)
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128 @return flag indicating a successful synchronization (boolean)
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129 """
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130 idx = self.__tocWidget.indexOf(url)
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131 if not idx.isValid():
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132 return False
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diff changeset
133 self.__tocWidget.setCurrentIndex(idx)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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134 return True
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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135
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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136 def __showContextMenu(self, pos):
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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137 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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138 Private slot showing the context menu.
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139
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parents:
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140 @param pos position to show the menu at (QPoint)
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141 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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142 if not self.__tocWidget.indexAt(pos).isValid():
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143 return
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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144
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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145 menu = QMenu()
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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146 curTab = menu.addAction(self.trUtf8("Open Link"))
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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147 newTab = menu.addAction(self.trUtf8("Open Link in New Tab"))
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parents:
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148 menu.move(self.__tocWidget.mapToGlobal(pos))
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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149
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Detlev Offenbach <detlev@die-offenbachs.de>
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150 model = self.__tocWidget.model()
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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151 itm = model.contentItemAt(self.__tocWidget.currentIndex())
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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152
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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153 act = menu.exec_()
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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154 if act == curTab:
487
4d41d03d3d00 Continued porting signal/slot usage to the new API.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 458
diff changeset
155 self.linkActivated.emit(itm.url())
0
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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156 elif act == newTab:
458
1695e7a2db54 Continued porting signal/slot usage to the new API.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 13
diff changeset
157 self.__mw.newTab(itm.url())

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