Helpviewer/HelpTabBar.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 2403
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child 2847
1843ef6e2656
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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f29e9405c851 Updated copyright for 2013.
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3 # Copyright (c) 2010 - 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 specialized tab bar for the web browser.
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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 Qt, QPoint, QTimer, QEvent
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13 from PyQt4.QtGui import QFrame, QLabel
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14
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15 from E5Gui.E5TabWidget import E5WheelTabBar
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16 from E5Gui.E5PassivePopup import E5PassivePopup
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17
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18 import Preferences
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19
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20
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21 class HelpTabBar(E5WheelTabBar):
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22 """
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23 Class implementing the tab bar of the web browser.
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24 """
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25 def __init__(self, parent=None):
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26 """
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27 Constructor
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28
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29 @param parent reference to the parent widget (HelpTabWidget)
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30 """
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31 E5WheelTabBar.__init__(self, parent)
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32
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33 self.__tabWidget = parent
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34
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35 self.__previewPopup = None
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36 self.__currentTabPreviewIndex = -1
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37
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38 self.setMouseTracking(True)
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39
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40 def __showTabPreview(self):
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41 """
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42 Private slot to show the tab preview.
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43 """
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44 indexedBrowser = self.__tabWidget.browserAt(self.__currentTabPreviewIndex)
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45 currentBrowser = self.__tabWidget.currentBrowser()
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46
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47 if indexedBrowser is None or currentBrowser is None:
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48 return
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49
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50 # no previews during load
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51 if indexedBrowser.progress() != 0:
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52 return
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53
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54 w = self.tabSizeHint(self.__currentTabPreviewIndex).width()
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55 h = int(w * currentBrowser.height() / currentBrowser.width())
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56
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57 self.__previewPopup = E5PassivePopup(self)
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58 self.__previewPopup.setFrameShape(QFrame.StyledPanel)
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59 self.__previewPopup.setFrameShadow(QFrame.Plain)
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60 self.__previewPopup.setFixedSize(w, h)
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61
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62 from .HelpSnap import renderTabPreview
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63 l = QLabel()
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64 l.setPixmap(renderTabPreview(indexedBrowser.page(), w, h))
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65
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66 self.__previewPopup.setView(l)
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67 self.__previewPopup.layout().setAlignment(Qt.AlignTop)
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68 self.__previewPopup.layout().setMargin(0)
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69
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70 tr = self.tabRect(self.__currentTabPreviewIndex)
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71 pos = QPoint(tr.x(), tr.y() + tr.height())
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72
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73 self.__previewPopup.show(self.mapToGlobal(pos))
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74
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75 def mouseMoveEvent(self, evt):
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76 """
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77 Protected method to handle mouse move events.
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78
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79 @param reference to the mouse move event (QMouseEvent)
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80 """
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81 if self.count() == 1:
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82 return
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83
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84 E5WheelTabBar.mouseMoveEvent(self, evt)
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85
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86 if Preferences.getHelp("ShowPreview"):
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87 # Find the tab under the mouse
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88 i = 0
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89 tabIndex = -1
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90 while i < self.count() and tabIndex == -1:
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91 if self.tabRect(i).contains(evt.pos()):
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92 tabIndex = i
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93 i += 1
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94
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95 # If found and not the current tab then show tab preview
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96 if tabIndex != -1 and \
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97 tabIndex != self.currentIndex() and \
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98 self.__currentTabPreviewIndex != tabIndex and \
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99 evt.buttons() == Qt.NoButton:
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100 self.__currentTabPreviewIndex = tabIndex
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101 QTimer.singleShot(200, self.__showTabPreview)
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102
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103 # If current tab or not found then hide previous tab preview
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104 if tabIndex == self.currentIndex() or \
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105 tabIndex == -1:
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106 if self.__previewPopup is not None:
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107 self.__previewPopup.hide()
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108 self.__currentTabPreviewIndex = -1
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109
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110 def leaveEvent(self, evt):
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111 """
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112 Protected method to handle leave events.
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113
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114 @param evt reference to the leave event (QEvent)
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115 """
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116 if Preferences.getHelp("ShowPreview"):
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117 # If leave tabwidget then hide previous tab preview
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118 if self.__previewPopup is not None:
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119 self.__previewPopup.hide()
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120 self.__currentTabPreviewIndex = -1
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121
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122 E5WheelTabBar.leaveEvent(self, evt)
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123
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124 def mousePressEvent(self, evt):
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125 """
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126 Protected method to handle mouse press events.
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127
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128 @param evt reference to the mouse press event (QMouseEvent)
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129 """
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130 if Preferences.getHelp("ShowPreview"):
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131 if self.__previewPopup is not None:
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132 self.__previewPopup.hide()
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133 self.__currentTabPreviewIndex = -1
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134
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135 E5WheelTabBar.mousePressEvent(self, evt)
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136
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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137 def event(self, evt):
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Detlev Offenbach <detlev@die-offenbachs.de>
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138 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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139 Protected method to handle event.
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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140
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parents: 791
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141 This event handler just handles the tooltip event and passes the
634
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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142 handling of all others to the superclass.
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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143
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Detlev Offenbach <detlev@die-offenbachs.de>
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144 @param evt reference to the event to be handled (QEvent)
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Detlev Offenbach <detlev@die-offenbachs.de>
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145 @return flag indicating, if the event was handled (boolean)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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146 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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147 if evt.type() == QEvent.ToolTip and \
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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148 Preferences.getHelp("ShowPreview"):
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Detlev Offenbach <detlev@die-offenbachs.de>
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149 # suppress tool tips if we are showing previews
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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150 evt.setAccepted(True)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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151 return True
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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 return E5WheelTabBar.event(self, evt)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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154
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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155 def tabRemoved(self, index):
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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156 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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157 Protected slot to handle the removal of a tab.
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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158
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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159 @param index index of the removed tab (integer)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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160 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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161 if Preferences.getHelp("ShowPreview"):
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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162 if self.__previewPopup is not None:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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163 self.__previewPopup.hide()
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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164 self.__currentTabPreviewIndex = -1

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