Graphics/PixmapDiagram.py

Mon, 26 Dec 2011 19:31:22 +0100

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Mon, 26 Dec 2011 19:31:22 +0100
changeset 1509
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parent 1507
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child 1518
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permissions
-rw-r--r--

Updated copyright for 2012.

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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2004 - 2012 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 dialog showing a pixmap.
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8 """
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9
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10 from PyQt4.QtCore import Qt, QSize
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11 from PyQt4.QtGui import QMainWindow, QLabel, QPalette, QSizePolicy, QScrollArea, \
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12 QAction, QMenu, QToolBar, QImage, QPixmap, QDialog, QPrinter, QPrintDialog, \
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13 QPainter, QFont, QColor
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14
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15 from E5Gui import E5MessageBox
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16
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17 from .ZoomDialog import ZoomDialog
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18
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19 import UI.Config
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20
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21 import Preferences
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22
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23
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24 class PixmapDiagram(QMainWindow):
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25 """
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26 Class implementing a dialog showing a pixmap.
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27 """
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28 def __init__(self, pixmap, parent=None, name=None):
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29 """
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30 Constructor
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31
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32 @param pixmap filename of a graphics file to show (string)
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33 @param parent parent widget of the view (QWidget)
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34 @param name name of the view widget (string)
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35 """
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36 super().__init__(parent)
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37 if name:
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38 self.setObjectName(name)
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39 else:
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40 self.setObjectName("PixmapDiagram")
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41 self.setWindowTitle(self.trUtf8("Pixmap-Viewer"))
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42
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43 self.pixmapLabel = QLabel()
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44 self.pixmapLabel.setObjectName("pixmapLabel")
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45 self.pixmapLabel.setBackgroundRole(QPalette.Base)
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46 self.pixmapLabel.setSizePolicy(QSizePolicy.Ignored, QSizePolicy.Ignored)
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47 self.pixmapLabel.setScaledContents(True)
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48
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49 self.pixmapView = QScrollArea()
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50 self.pixmapView.setObjectName("pixmapView")
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51 self.pixmapView.setBackgroundRole(QPalette.Dark)
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52 self.pixmapView.setWidget(self.pixmapLabel)
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53
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54 self.setCentralWidget(self.pixmapView)
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55
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56 # polish up the dialog
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57 self.resize(QSize(800, 600).expandedTo(self.minimumSizeHint()))
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58
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59 self.zoom = 1.0
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60 self.pixmapfile = pixmap
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61 self.status = self.__showPixmap(self.pixmapfile)
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62
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63 self.__initActions()
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64 self.__initContextMenu()
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65 self.__initToolBars()
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66
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67 def __initActions(self):
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68 """
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69 Private method to initialize the view actions.
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70 """
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71 self.closeAct = \
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72 QAction(UI.PixmapCache.getIcon("close.png"),
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73 self.trUtf8("Close"), self)
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74 self.closeAct.triggered[()].connect(self.close)
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75
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76 self.printAct = \
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77 QAction(UI.PixmapCache.getIcon("print.png"),
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78 self.trUtf8("Print"), self)
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79 self.printAct.triggered[()].connect(self.__printDiagram)
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80
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81 self.printPreviewAct = \
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82 QAction(UI.PixmapCache.getIcon("printPreview.png"),
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83 self.trUtf8("Print Preview"), self)
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84 self.printPreviewAct.triggered[()].connect(self.__printPreviewDiagram)
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85
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86 self.zoomInAct = \
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87 QAction(UI.PixmapCache.getIcon("zoomIn.png"),
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88 self.trUtf8("Zoom in"), self)
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89 self.zoomInAct.triggered[()].connect(self.__zoomIn)
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90
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91 self.zoomOutAct = \
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92 QAction(UI.PixmapCache.getIcon("zoomOut.png"),
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93 self.trUtf8("Zoom out"), self)
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94 self.zoomOutAct.triggered[()].connect(self.__zoomOut)
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95
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96 self.zoomAct = \
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97 QAction(UI.PixmapCache.getIcon("zoomTo.png"),
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98 self.trUtf8("Zoom..."), self)
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99 self.zoomAct.triggered[()].connect(self.__zoom)
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100
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101 self.zoomResetAct = \
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102 QAction(UI.PixmapCache.getIcon("zoomReset.png"),
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103 self.trUtf8("Zoom reset"), self)
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104 self.zoomResetAct.triggered[()].connect(self.__zoomReset)
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105
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106 def __initContextMenu(self):
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107 """
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108 Private method to initialize the context menu.
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109 """
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110 self.__menu = QMenu(self)
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111 self.__menu.addAction(self.closeAct)
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112 self.__menu.addSeparator()
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113 self.__menu.addAction(self.printPreviewAct)
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114 self.__menu.addAction(self.printAct)
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115 self.__menu.addSeparator()
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116 self.__menu.addAction(self.zoomInAct)
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117 self.__menu.addAction(self.zoomOutAct)
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118 self.__menu.addAction(self.zoomAct)
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119 self.__menu.addAction(self.zoomResetAct)
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120
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121 self.setContextMenuPolicy(Qt.CustomContextMenu)
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122 self.customContextMenuRequested.connect(self.__showContextMenu)
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123
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124 def __showContextMenu(self, coord):
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125 """
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126 Private slot to show the context menu of the listview.
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127
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128 @param coord the position of the mouse pointer (QPoint)
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129 """
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parents:
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130 self.__menu.popup(self.mapToGlobal(coord))
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131
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132 def __initToolBars(self):
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133 """
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parents:
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134 Private method to populate the toolbars with our actions.
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parents:
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135 """
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parents:
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136 self.windowToolBar = QToolBar(self.trUtf8("Window"), self)
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parents:
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137 self.windowToolBar.setIconSize(UI.Config.ToolBarIconSize)
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parents:
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138 self.windowToolBar.addAction(self.closeAct)
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139
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140 self.graphicsToolBar = QToolBar(self.trUtf8("Graphics"), self)
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parents:
diff changeset
141 self.graphicsToolBar.setIconSize(UI.Config.ToolBarIconSize)
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parents:
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142 self.graphicsToolBar.addAction(self.printPreviewAct)
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parents:
diff changeset
143 self.graphicsToolBar.addAction(self.printAct)
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parents:
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144 self.graphicsToolBar.addSeparator()
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parents:
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145 self.graphicsToolBar.addAction(self.zoomInAct)
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parents:
diff changeset
146 self.graphicsToolBar.addAction(self.zoomOutAct)
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parents:
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147 self.graphicsToolBar.addAction(self.zoomAct)
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148 self.graphicsToolBar.addAction(self.zoomResetAct)
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149
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150 self.addToolBar(Qt.TopToolBarArea, self.windowToolBar)
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parents:
diff changeset
151 self.addToolBar(Qt.TopToolBarArea, self.graphicsToolBar)
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152
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153 def __showPixmap(self, filename):
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parents:
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154 """
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parents:
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155 Private method to show a file.
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156
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157 @param filename name of the file to be shown (string)
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parents:
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158 @return flag indicating success (boolean)
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parents:
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159 """
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parents:
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160 image = QImage(filename)
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parents:
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161 if image.isNull():
539
87f9bce38a44 Continued replacing QMessageBox methods with own methods.
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parents: 483
diff changeset
162 E5MessageBox.warning(self,
0
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parents:
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163 self.trUtf8("Pixmap-Viewer"),
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parents:
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164 self.trUtf8("""<p>The file <b>{0}</b> cannot be displayed."""
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parents:
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165 """ The format is not supported.</p>""").format(filename))
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parents:
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166 return False
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parents:
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167
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parents:
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168 self.pixmapLabel.setPixmap(QPixmap.fromImage(image))
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parents:
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169 self.pixmapLabel.adjustSize()
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parents:
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170 return True
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171
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172 def getDiagramName(self):
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parents:
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173 """
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parents:
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174 Method to retrieve a name for the diagram.
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175
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176 @return name for the diagram
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parents:
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177 """
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parents:
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178 return self.pixmapfile
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parents:
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179
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parents:
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180 def getStatus(self):
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parents:
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181 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
182 Method to retrieve the status of the canvas.
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parents:
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183
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parents:
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184 @return flag indicating a successful pixmap loading (boolean)
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parents:
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185 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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186 return self.status
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parents:
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187
1507
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188 def wheelEvent(self, evt):
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189 """
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parents: 1155
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190 Protected method to handle wheel events.
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parents: 1155
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191
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192 @param evt reference to the wheel event (QWheelEvent)
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193 """
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parents: 1155
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194 if evt.modifiers() & Qt.ControlModifier:
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parents: 1155
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195 if evt.delta()< 0:
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parents: 1155
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196 self.__zoomOut()
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parents: 1155
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197 else:
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198 self.__zoomIn()
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199 evt.accept()
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200 return
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parents: 1155
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201
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parents: 1155
diff changeset
202 super().wheelEvent(evt)
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203
0
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204 ############################################################################
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parents:
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205 ## Private menu handling methods below.
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parents:
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206 ############################################################################
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207
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208 def __adjustScrollBar(self, scrollBar, factor):
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parents:
diff changeset
209 """
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parents:
diff changeset
210 Private method to adjust a scrollbar by a certain factor.
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diff changeset
211
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parents:
diff changeset
212 @param scrollBar reference to the scrollbar object (QScrollBar)
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parents:
diff changeset
213 @param factor factor to adjust by (float)
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parents:
diff changeset
214 """
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parents:
diff changeset
215 scrollBar.setValue(int(factor * scrollBar.value()
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parents: 791
diff changeset
216 + ((factor - 1) * scrollBar.pageStep() / 2)))
0
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217
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diff changeset
218 def __doZoom(self, factor):
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parents:
diff changeset
219 """
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parents:
diff changeset
220 Private method to perform the zooming.
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diff changeset
221
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parents:
diff changeset
222 @param factor zoom factor (float)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
223 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
224 self.zoom *= factor
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parents:
diff changeset
225 self.pixmapLabel.resize(self.zoom * self.pixmapLabel.pixmap().size())
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parents:
diff changeset
226
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parents:
diff changeset
227 self.__adjustScrollBar(self.pixmapView.horizontalScrollBar(), factor)
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parents:
diff changeset
228 self.__adjustScrollBar(self.pixmapView.verticalScrollBar(), factor)
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229
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parents:
diff changeset
230 def __zoomIn(self):
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parents:
diff changeset
231 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
232 Private method to handle the zoom in context menu entry.
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
233 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
234 self.__doZoom(1.25)
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parents:
diff changeset
235
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parents:
diff changeset
236 def __zoomOut(self):
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parents:
diff changeset
237 """
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parents:
diff changeset
238 Private method to handle the zoom out context menu entry.
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
239 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
240 self.__doZoom(0.8)
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parents:
diff changeset
241
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parents:
diff changeset
242 def __zoomReset(self):
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
243 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
244 Private method to handle the reset zoom context menu entry.
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
245 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
246 self.zoom = 1.0
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parents:
diff changeset
247 self.pixmapLabel.adjustSize()
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parents:
diff changeset
248
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diff changeset
249 def __zoom(self):
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parents:
diff changeset
250 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
251 Private method to handle the zoom context menu action.
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parents:
diff changeset
252 """
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parents:
diff changeset
253 dlg = ZoomDialog(self.zoom, self)
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parents:
diff changeset
254 if dlg.exec_() == QDialog.Accepted:
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parents:
diff changeset
255 zoom = dlg.getZoomSize()
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parents:
diff changeset
256 factor = zoom / self.zoom
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parents:
diff changeset
257 self.__doZoom(factor)
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diff changeset
258
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parents:
diff changeset
259 def __printDiagram(self):
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parents:
diff changeset
260 """
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parents:
diff changeset
261 Private slot called to print the diagram.
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
262 """
945
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Detlev Offenbach <detlev@die-offenbachs.de>
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263 printer = QPrinter(mode=QPrinter.ScreenResolution)
0
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parents:
diff changeset
264 printer.setFullPage(True)
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parents:
diff changeset
265 if Preferences.getPrinter("ColorMode"):
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266 printer.setColorMode(QPrinter.Color)
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parents:
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267 else:
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parents:
diff changeset
268 printer.setColorMode(QPrinter.GrayScale)
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269 if Preferences.getPrinter("FirstPageFirst"):
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270 printer.setPageOrder(QPrinter.FirstPageFirst)
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271 else:
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parents:
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272 printer.setPageOrder(QPrinter.LastPageFirst)
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273 printer.setPrinterName(Preferences.getPrinter("PrinterName"))
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274
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275 printDialog = QPrintDialog(printer, self)
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276 if printDialog.exec_():
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277 self.__print(printer)
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278
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279 def __printPreviewDiagram(self):
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280 """
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281 Private slot called to show a print preview of the diagram.
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282 """
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283 from PyQt4.QtGui import QPrintPreviewDialog
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284
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285 printer = QPrinter(mode=QPrinter.ScreenResolution)
0
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diff changeset
286 printer.setFullPage(True)
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parents:
diff changeset
287 if Preferences.getPrinter("ColorMode"):
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diff changeset
288 printer.setColorMode(QPrinter.Color)
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parents:
diff changeset
289 else:
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diff changeset
290 printer.setColorMode(QPrinter.GrayScale)
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parents:
diff changeset
291 if Preferences.getPrinter("FirstPageFirst"):
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diff changeset
292 printer.setPageOrder(QPrinter.FirstPageFirst)
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parents:
diff changeset
293 else:
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diff changeset
294 printer.setPageOrder(QPrinter.LastPageFirst)
1155
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295 printer.setPageMargins(
4cbef040f07e Fixed issues setting the printer margins correctly.
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296 Preferences.getPrinter("LeftMargin") * 10,
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parents: 1131
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297 Preferences.getPrinter("TopMargin") * 10,
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298 Preferences.getPrinter("RightMargin") * 10,
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299 Preferences.getPrinter("BottomMargin") * 10,
4cbef040f07e Fixed issues setting the printer margins correctly.
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parents: 1131
diff changeset
300 QPrinter.Millimeter
4cbef040f07e Fixed issues setting the printer margins correctly.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1131
diff changeset
301 )
0
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parents:
diff changeset
302 printer.setPrinterName(Preferences.getPrinter("PrinterName"))
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parents:
diff changeset
303
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parents:
diff changeset
304 preview = QPrintPreviewDialog(printer, self)
483
ca7d8599a575 Continued porting signal/slot usage to the new API.
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parents: 458
diff changeset
305 preview.paintRequested[QPrinter].connect(self.__print)
0
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parents:
diff changeset
306 preview.exec_()
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parents:
diff changeset
307
de9c2efb9d02 Started porting eric4 to Python3
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parents:
diff changeset
308 def __print(self, printer):
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
309 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
310 Private slot to the actual printing.
de9c2efb9d02 Started porting eric4 to Python3
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parents:
diff changeset
311
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parents:
diff changeset
312 @param printer reference to the printer object (QPrinter)
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parents:
diff changeset
313 """
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
314 painter = QPainter()
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parents:
diff changeset
315 painter.begin(printer)
de9c2efb9d02 Started porting eric4 to Python3
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parents:
diff changeset
316
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parents:
diff changeset
317 # calculate margin and width of printout
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parents:
diff changeset
318 font = QFont("times", 10)
de9c2efb9d02 Started porting eric4 to Python3
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parents:
diff changeset
319 painter.setFont(font)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
320 fm = painter.fontMetrics()
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
321 fontHeight = fm.lineSpacing()
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
322 marginX = printer.pageRect().x() - printer.paperRect().x()
de9c2efb9d02 Started porting eric4 to Python3
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parents:
diff changeset
323 marginX = \
de9c2efb9d02 Started porting eric4 to Python3
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parents:
diff changeset
324 Preferences.getPrinter("LeftMargin") * int(printer.resolution() / 2.54) \
de9c2efb9d02 Started porting eric4 to Python3
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parents:
diff changeset
325 - marginX
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
326 marginY = printer.pageRect().y() - printer.paperRect().y()
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parents:
diff changeset
327 marginY = \
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
328 Preferences.getPrinter("TopMargin") * int(printer.resolution() / 2.54) \
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
329 - marginY
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
330
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
331 width = printer.width() - marginX \
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
332 - Preferences.getPrinter("RightMargin") * int(printer.resolution() / 2.54)
de9c2efb9d02 Started porting eric4 to Python3
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parents:
diff changeset
333 height = printer.height() - fontHeight - 4 - marginY \
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
334 - Preferences.getPrinter("BottomMargin") * int(printer.resolution() / 2.54)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
335
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
336 # write a foot note
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
337 s = self.trUtf8("Diagram: {0}").format(self.getDiagramName())
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
338 tc = QColor(50, 50, 50)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
339 painter.setPen(tc)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
340 painter.drawRect(marginX, marginY, width, height)
945
8cd4d08fa9f6 Made code mostly PEP 8 compliant (except all whitespace and line length).
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 791
diff changeset
341 painter.drawLine(marginX, marginY + height + 2,
0
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
342 marginX + width, marginY + height + 2)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
343 painter.setFont(font)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
344 painter.drawText(marginX, marginY + height + 4, width,
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
345 fontHeight, Qt.AlignRight, s)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
346
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
347 # render the diagram
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
348 size = self.pixmapLabel.pixmap().size()
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
349 size.scale(QSize(width - 10, height - 10), # 5 px inner margin
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
350 Qt.KeepAspectRatio)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
351 painter.setViewport(marginX + 5, marginY + 5, size.width(), size.height())
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
352 painter.setWindow(self.pixmapLabel.pixmap().rect())
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
353 painter.drawPixmap(0, 0, self.pixmapLabel.pixmap())
945
8cd4d08fa9f6 Made code mostly PEP 8 compliant (except all whitespace and line length).
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 791
diff changeset
354 painter.end()

eric ide

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