eric6/Snapshot/SnapshotDefaultGrabber.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 7966
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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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91e843545d9a Updated copyright for 2021.
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3 # Copyright (c) 2019 - 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 grabber object for non-Wayland desktops.
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8 """
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9
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10 from PyQt5.QtCore import pyqtSignal, Qt, QObject, QTimer, QEvent
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11 from PyQt5.QtGui import QPixmap, QCursor, QGuiApplication
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12 from PyQt5.QtWidgets import QWidget
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13
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14 from .SnapshotModes import SnapshotModes
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15
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16 import Globals
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17
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18
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19 class SnapshotDefaultGrabber(QObject):
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20 """
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21 Class implementing a grabber object for non-Wayland desktops.
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22
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23 @signal grabbed(QPixmap) emitted after the grab operation is finished
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24 """
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25 grabbed = pyqtSignal(QPixmap)
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26
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27 def __init__(self, parent=None):
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28 """
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29 Constructor
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30
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31 @param parent reference to the parent object
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32 @type QObject
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33 """
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34 super(SnapshotDefaultGrabber, self).__init__(parent)
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35
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36 self.__grabber = None
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37 self.__grabberWidget = QWidget(None, Qt.X11BypassWindowManagerHint)
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38 self.__grabberWidget.move(-10000, -10000)
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39 self.__grabberWidget.installEventFilter(self)
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40
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41 from .SnapshotTimer import SnapshotTimer
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42 self.__grabTimer = SnapshotTimer()
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43 self.__grabTimer.timeout.connect(self.__grabTimerTimeout)
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44
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45 def supportedModes(self):
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46 """
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47 Public method to get the supported screenshot modes.
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48
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49 @return tuple of supported screenshot modes
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50 @rtype tuple of SnapshotModes
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51 """
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52 return (
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53 SnapshotModes.Fullscreen,
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54 SnapshotModes.SelectedScreen,
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55 SnapshotModes.Rectangle,
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56 SnapshotModes.Freehand,
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57 SnapshotModes.Ellipse,
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58 )
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59
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60 def grab(self, mode, delay=0, captureCursor=False,
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61 captureDecorations=False):
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62 """
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63 Public method to perform a grab operation potentially after a delay.
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64
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65 @param mode screenshot mode
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66 @type ScreenshotModes
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67 @param delay delay in seconds
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68 @type int
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69 @param captureCursor flag indicating to include the mouse cursor
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70 (not used)
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71 @type bool
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72 @param captureDecorations flag indicating to include the window
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73 decorations (not used)
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74 @type bool
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75 """
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76 self.__mode = mode
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77 if delay:
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78 self.__grabTimer.start(delay)
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79 else:
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80 QTimer.singleShot(200, self.__startUndelayedGrab)
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81
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82 def __grabTimerTimeout(self):
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83 """
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84 Private slot to perform a delayed grab operation.
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85 """
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86 if self.__mode == SnapshotModes.Rectangle:
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87 self.__grabRectangle()
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88 elif self.__mode == SnapshotModes.Ellipse:
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89 self.__grabEllipse()
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90 elif self.__mode == SnapshotModes.Freehand:
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91 self.__grabFreehand()
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92 else:
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93 self.__performGrab(self.__mode)
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94
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95 def __startUndelayedGrab(self):
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96 """
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97 Private slot to perform an undelayed grab operation.
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98 """
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99 if self.__mode == SnapshotModes.Rectangle:
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100 self.__grabRectangle()
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101 elif self.__mode == SnapshotModes.Ellipse:
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102 self.__grabEllipse()
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103 elif self.__mode == SnapshotModes.Freehand:
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104 self.__grabFreehand()
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105 else:
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106 if Globals.isMacPlatform():
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107 self.__performGrab(self.__mode)
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108 else:
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109 self.__grabberWidget.show()
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110 self.__grabberWidget.grabMouse(Qt.CrossCursor)
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111
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112 def __grabRectangle(self):
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113 """
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114 Private method to grab a rectangular screen region.
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115 """
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116 from .SnapshotRegionGrabber import SnapshotRegionGrabber
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117 self.__grabber = SnapshotRegionGrabber(
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118 mode=SnapshotRegionGrabber.Rectangle)
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119 self.__grabber.grabbed.connect(self.__captured)
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120
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121 def __grabEllipse(self):
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122 """
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123 Private method to grab an elliptical screen region.
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124 """
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125 from .SnapshotRegionGrabber import SnapshotRegionGrabber
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126 self.__grabber = SnapshotRegionGrabber(
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127 mode=SnapshotRegionGrabber.Ellipse)
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128 self.__grabber.grabbed.connect(self.__captured)
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129
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130 def __grabFreehand(self):
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131 """
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132 Private method to grab a non-rectangular screen region.
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133 """
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134 from .SnapshotFreehandGrabber import SnapshotFreehandGrabber
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135 self.__grabber = SnapshotFreehandGrabber()
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136 self.__grabber.grabbed.connect(self.__captured)
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137
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138 def __performGrab(self, mode):
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139 """
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140 Private method to perform a screen grab other than a selected region.
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141
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142 @param mode screenshot mode
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143 @type SnapshotModes
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144 """
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145 self.__grabberWidget.releaseMouse()
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146 self.__grabberWidget.hide()
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147 self.__grabTimer.stop()
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148
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149 if mode == SnapshotModes.Fullscreen:
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150 screen = QGuiApplication.screens()[0]
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151 vgeom = screen.availableVirtualGeometry()
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152 snapshot = screen.grabWindow(
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153 0, vgeom.x(), vgeom.y(), vgeom.width(), vgeom.height())
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154 elif mode == SnapshotModes.SelectedScreen:
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155 screen = QGuiApplication.screenAt(QCursor.pos())
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156 sgeom = screen.geometry()
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157 if Globals.isMacPlatform():
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158 # macOS variant
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159 snapshot = screen.grabWindow(
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160 0, sgeom.x(), sgeom.y(), sgeom.width(), sgeom.height()
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161 )
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162 else:
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163 # Linux variant
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164 # Windows variant
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165 snapshot = screen.grabWindow(
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166 0, 0, 0, sgeom.width(), sgeom.height())
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167 else:
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168 snapshot = QPixmap()
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169
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170 self.grabbed.emit(snapshot)
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171
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172 def __captured(self, pixmap):
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173 """
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174 Private slot to show a preview of the snapshot.
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175
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176 @param pixmap pixmap of the snapshot (QPixmap)
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177 """
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178 self.__grabber.close()
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179 snapshot = QPixmap(pixmap)
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180
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181 self.__grabber.grabbed.disconnect(self.__captured)
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182 self.__grabber = None
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183
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184 self.grabbed.emit(snapshot)
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185
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186 def eventFilter(self, obj, evt):
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187 """
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188 Public method to handle event for other objects.
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189
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190 @param obj reference to the object (QObject)
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191 @param evt reference to the event (QEvent)
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192 @return flag indicating that the event should be filtered out (boolean)
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193 """
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194 if (
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195 obj == self.__grabberWidget and
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196 evt.type() == QEvent.MouseButtonPress
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197 ):
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198 if QWidget.mouseGrabber() != self.__grabberWidget:
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199 return False
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200 if evt.button() == Qt.LeftButton:
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201 self.__performGrab(self.__mode)
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202
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203 return False

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