eric6/IconEditor/IconEditorPalette.py

Sat, 19 Dec 2020 15:22:26 +0100

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Sat, 19 Dec 2020 15:22:26 +0100
changeset 7900
72b88fb20261
parent 7780
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child 7923
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permissions
-rw-r--r--

Corrected the use of '@keyparam' in the source documentation.

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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2009 - 2020 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 palette widget for the icon editor.
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8 """
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9
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10 from PyQt5.QtCore import pyqtSignal, Qt
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11 from PyQt5.QtGui import QColor, QPainter, QPixmap
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12 from PyQt5.QtWidgets import (
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13 QWidget, QBoxLayout, QLabel, QFrame, QPushButton, QSpinBox, QGroupBox,
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14 QVBoxLayout, QRadioButton, QSpacerItem, QSizePolicy, QColorDialog
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15 )
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16
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17
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18 class IconEditorPalette(QWidget):
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19 """
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20 Class implementing a palette widget for the icon editor.
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21
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22 @signal colorSelected(QColor) emitted after a new color has been selected
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23 @signal compositingChanged(QPainter.CompositionMode) emitted to signal a
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24 change of the compositing mode
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25 """
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26 colorSelected = pyqtSignal(QColor)
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27 compositingChanged = pyqtSignal(QPainter.CompositionMode)
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28
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29 def __init__(self, parent=None):
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30 """
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31 Constructor
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32
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33 @param parent reference to the parent widget (QWidget)
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34 """
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35 super(IconEditorPalette, self).__init__(parent)
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36
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37 if self.layoutDirection == Qt.Horizontal:
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38 direction = QBoxLayout.LeftToRight
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39 else:
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40 direction = QBoxLayout.TopToBottom
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41 self.__layout = QBoxLayout(direction, self)
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42 self.setLayout(self.__layout)
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43
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44 self.__preview = QLabel(self)
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45 self.__preview.setFrameStyle(QFrame.Panel | QFrame.Sunken)
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46 self.__preview.setFixedHeight(64)
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47 self.__preview.setAlignment(Qt.AlignHCenter | Qt.AlignVCenter)
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48 self.__preview.setWhatsThis(self.tr(
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49 """<b>Preview</b>"""
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50 """<p>This is a 1:1 preview of the current icon.</p>"""
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51 ))
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52 self.__layout.addWidget(self.__preview)
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53
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54 self.__color = QLabel(self)
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55 self.__color.setFrameStyle(QFrame.Panel | QFrame.Sunken)
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56 self.__color.setFixedHeight(24)
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57 self.__color.setAlignment(Qt.AlignHCenter | Qt.AlignVCenter)
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58 self.__color.setWhatsThis(self.tr(
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59 """<b>Current Color</b>"""
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60 """<p>This is the currently selected color used for drawing.</p>"""
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61 ))
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62 self.__layout.addWidget(self.__color)
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63
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64 self.__colorTxt = QLabel(self)
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65 self.__colorTxt.setAlignment(Qt.AlignHCenter | Qt.AlignVCenter)
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66 self.__colorTxt.setWhatsThis(self.tr(
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67 """<b>Current Color Value</b>"""
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68 """<p>This is the currently selected color value used for"""
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69 """ drawing.</p>"""
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70 ))
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71 self.__layout.addWidget(self.__colorTxt)
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72
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73 self.__colorButton = QPushButton(self.tr("Select Color"), self)
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74 self.__colorButton.setWhatsThis(self.tr(
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75 """<b>Select Color</b>"""
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76 """<p>Select the current drawing color via a color selection"""
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77 """ dialog.</p>"""
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78 ))
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79 self.__colorButton.clicked.connect(self.__selectColor)
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80 self.__layout.addWidget(self.__colorButton)
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81
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82 self.__colorAlpha = QSpinBox(self)
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83 self.__colorAlpha.setRange(0, 255)
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84 self.__colorAlpha.setWhatsThis(self.tr(
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85 """<b>Select alpha channel value</b>"""
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86 """<p>Select the value for the alpha channel of the current"""
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87 """ color.</p>"""
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88 ))
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89 self.__layout.addWidget(self.__colorAlpha)
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90 self.__colorAlpha.valueChanged[int].connect(self.__alphaChanged)
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91
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92 self.__compositingGroup = QGroupBox(self.tr("Compositing"), self)
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93 self.__compositingGroupLayout = QVBoxLayout(self.__compositingGroup)
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94 self.__compositingGroup.setLayout(self.__compositingGroupLayout)
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95 self.__sourceButton = QRadioButton(self.tr("Replace"),
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96 self.__compositingGroup)
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97 self.__sourceButton.setWhatsThis(self.tr(
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98 """<b>Replace</b>"""
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99 """<p>Replace the existing pixel with a new color.</p>"""
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100 ))
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101 self.__sourceButton.clicked[bool].connect(self.__compositingChanged)
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102 self.__compositingGroupLayout.addWidget(self.__sourceButton)
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103 self.__sourceOverButton = QRadioButton(self.tr("Blend"),
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104 self.__compositingGroup)
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105 self.__sourceOverButton.setWhatsThis(self.tr(
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106 """<b>Blend</b>"""
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107 """<p>Blend the new color over the existing pixel.</p>"""
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108 ))
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109 self.__sourceOverButton.setChecked(True)
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110 self.__sourceOverButton.clicked[bool].connect(
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111 self.__compositingChanged)
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112 self.__compositingGroupLayout.addWidget(self.__sourceOverButton)
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113 self.__layout.addWidget(self.__compositingGroup)
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114
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115 spacer = QSpacerItem(
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116 10, 10, QSizePolicy.Minimum, QSizePolicy.Expanding)
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117 self.__layout.addItem(spacer)
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118
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119 def previewChanged(self, pixmap):
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120 """
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121 Public slot to update the preview.
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122
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123 @param pixmap new preview pixmap (QPixmap)
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124 """
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125 self.__preview.setPixmap(pixmap)
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126
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127 def colorChanged(self, color):
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128 """
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129 Public slot to update the color preview.
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130
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131 @param color new color (QColor)
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132 """
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133 self.__currentColor = color
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134 self.__currentAlpha = color.alpha()
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135
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136 pm = QPixmap(90, 18)
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137 pm.fill(color)
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138 self.__color.setPixmap(pm)
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139
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140 self.__colorTxt.setText(
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141 "{0:d}, {1:d}, {2:d}, {3:d}".format(
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142 color.red(), color.green(), color.blue(), color.alpha()))
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143
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144 self.__colorAlpha.setValue(self.__currentAlpha)
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145
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146 def __selectColor(self):
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147 """
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148 Private slot to select a new drawing color.
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149 """
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150 col = QColorDialog.getColor(self.__currentColor)
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151 col.setAlpha(self.__currentAlpha)
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152
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153 if col.isValid():
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154 self.colorSelected.emit(col)
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155
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156 def __alphaChanged(self, val):
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157 """
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158 Private slot to track changes of the alpha channel.
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159
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160 @param val value of the alpha channel
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161 """
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162 if val != self.__currentAlpha:
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163 col = QColor(self.__currentColor)
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164 col.setAlpha(val)
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165 self.colorSelected.emit(col)
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166
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167 def setCompositingMode(self, mode):
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168 """
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169 Public method to set the compositing mode.
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170
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171 @param mode compositing mode to set (QPainter.CompositionMode)
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172 """
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173 if mode == QPainter.CompositionMode_Source:
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174 self.__sourceButton.setChecked(True)
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175 elif mode == QPainter.CompositionMode_SourceOver:
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176 self.__sourceOverButton.setChecked(True)
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177
618
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178 def __compositingChanged(self, on):
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179 """
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Detlev Offenbach <detlev@die-offenbachs.de>
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180 Private slot to handle a change of the compositing mode.
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181
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182 @param on flag indicating the checked state of the compositing button
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183 (boolean)
618
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184 """
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185 if on:
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186 if self.__sourceButton.isChecked():
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187 self.compositingChanged.emit(
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Detlev Offenbach <detlev@die-offenbachs.de>
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188 QPainter.CompositionMode_Source)
618
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parents: 495
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189 elif self.__sourceOverButton.isChecked():
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190 self.compositingChanged.emit(
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2957
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191 QPainter.CompositionMode_SourceOver)

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