Graphics/SvgDiagram.py

Sat, 12 Jan 2013 18:44:39 +0100

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Sat, 12 Jan 2013 18:44:39 +0100
changeset 2334
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parent 2302
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child 2525
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child 2992
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permissions
-rw-r--r--

Introduced a zoom widget in the status bar of several windows.

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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2008 - 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 dialog showing a SVG graphic.
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8 """
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9
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10 from PyQt4.QtCore import Qt, QSize, QEvent
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11 from PyQt4.QtGui import QPalette, QSizePolicy, QScrollArea, QAction, QMenu, QToolBar, \
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12 QPrinter, QPrintDialog, QPainter, QFont, QColor
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13 from PyQt4.QtSvg import QSvgWidget
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14
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15 from E5Gui.E5MainWindow import E5MainWindow
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16 from E5Gui.E5ZoomWidget import E5ZoomWidget
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17
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18 import UI.Config
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19
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20 import Preferences
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21
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22
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23 class SvgDiagram(E5MainWindow):
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24 """
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25 Class implementing a dialog showing a SVG graphic.
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26 """
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27 ZoomLevels = [
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28 1, 3, 5, 7, 9,
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29 10, 20, 30, 50, 67, 80, 90,
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30 100,
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31 110, 120, 133, 150, 170, 200, 240, 300, 400,
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32 500, 600, 700, 800, 900, 1000,
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33 ]
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34 ZoomLevelDefault = 100
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35
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36 def __init__(self, svgFile, parent=None, name=None):
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37 """
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38 Constructor
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39
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40 @param svgFile filename of a SVG graphics file to show (string)
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41 @param parent parent widget of the view (QWidget)
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42 @param name name of the view widget (string)
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43 """
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44 super().__init__(parent)
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45 if name:
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46 self.setObjectName(name)
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47 else:
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48 self.setObjectName("SvgDiagram")
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49 self.setWindowTitle(self.trUtf8("SVG-Viewer"))
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50
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51 self.svgWidget = QSvgWidget()
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52 self.svgWidget.setObjectName("svgWidget")
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53 self.svgWidget.setBackgroundRole(QPalette.Base)
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54 self.svgWidget.setSizePolicy(QSizePolicy.Ignored, QSizePolicy.Ignored)
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55
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56 self.svgView = QScrollArea()
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57 self.svgView.setObjectName("svgView")
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58 self.svgView.setBackgroundRole(QPalette.Dark)
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59 self.svgView.setWidget(self.svgWidget)
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60
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61 self.setCentralWidget(self.svgView)
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62
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63 self.__zoomWidget = E5ZoomWidget(UI.PixmapCache.getPixmap("zoomOut.png"),
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64 UI.PixmapCache.getPixmap("zoomIn.png"),
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65 UI.PixmapCache.getPixmap("zoomReset.png"), self)
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66 self.statusBar().addPermanentWidget(self.__zoomWidget)
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67 self.__zoomWidget.setMapping(
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68 SvgDiagram.ZoomLevels, SvgDiagram.ZoomLevelDefault)
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69 self.__zoomWidget.valueChanged.connect(self.__doZoom)
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70
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71 # polish up the dialog
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72 self.resize(QSize(800, 600).expandedTo(self.minimumSizeHint()))
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73
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74 self.zoom = 1.0
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75 self.svgFile = svgFile
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76 self.svgWidget.load(self.svgFile)
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77 self.svgWidget.resize(self.svgWidget.renderer().defaultSize())
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78
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79 self.__initActions()
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80 self.__initContextMenu()
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81 self.__initToolBars()
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82
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83 self.grabGesture(Qt.PinchGesture)
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84
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85 def __initActions(self):
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86 """
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87 Private method to initialize the view actions.
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88 """
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89 self.closeAct = \
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90 QAction(UI.PixmapCache.getIcon("close.png"),
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91 self.trUtf8("Close"), self)
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92 self.closeAct.triggered[()].connect(self.close)
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93
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94 self.printAct = \
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95 QAction(UI.PixmapCache.getIcon("print.png"),
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96 self.trUtf8("Print"), self)
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97 self.printAct.triggered[()].connect(self.__printDiagram)
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98
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99 self.printPreviewAct = \
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100 QAction(UI.PixmapCache.getIcon("printPreview.png"),
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101 self.trUtf8("Print Preview"), self)
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102 self.printPreviewAct.triggered[()].connect(self.__printPreviewDiagram)
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103
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104 def __initContextMenu(self):
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105 """
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106 Private method to initialize the context menu.
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107 """
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108 self.__menu = QMenu(self)
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109 self.__menu.addAction(self.closeAct)
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110 self.__menu.addSeparator()
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111 self.__menu.addAction(self.printPreviewAct)
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112 self.__menu.addAction(self.printAct)
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113
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114 self.setContextMenuPolicy(Qt.CustomContextMenu)
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115 self.customContextMenuRequested.connect(self.__showContextMenu)
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116
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117 def __showContextMenu(self, coord):
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118 """
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119 Private slot to show the context menu of the listview.
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120
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121 @param coord the position of the mouse pointer (QPoint)
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122 """
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123 self.__menu.popup(self.mapToGlobal(coord))
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124
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125 def __initToolBars(self):
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126 """
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127 Private method to populate the toolbars with our actions.
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128 """
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129 self.windowToolBar = QToolBar(self.trUtf8("Window"), self)
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130 self.windowToolBar.setIconSize(UI.Config.ToolBarIconSize)
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131 self.windowToolBar.addAction(self.closeAct)
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132
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133 self.graphicsToolBar = QToolBar(self.trUtf8("Graphics"), self)
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134 self.graphicsToolBar.setIconSize(UI.Config.ToolBarIconSize)
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135 self.graphicsToolBar.addAction(self.printPreviewAct)
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136 self.graphicsToolBar.addAction(self.printAct)
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137
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138 self.addToolBar(Qt.TopToolBarArea, self.windowToolBar)
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139 self.addToolBar(Qt.TopToolBarArea, self.graphicsToolBar)
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140
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141 def getDiagramName(self):
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142 """
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143 Method to retrieve a name for the diagram.
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144
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145 @return name for the diagram
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146 """
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147 return self.svgFile
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148
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149 def wheelEvent(self, evt):
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150 """
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151 Protected method to handle wheel events.
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152
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153 @param evt reference to the wheel event (QWheelEvent)
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154 """
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155 if evt.modifiers() & Qt.ControlModifier:
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156 if evt.delta() < 0:
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157 self.__zoomOut()
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158 else:
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159 self.__zoomIn()
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160 evt.accept()
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161 return
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162
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163 super().wheelEvent(evt)
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164
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165 def event(self, evt):
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166 """
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167 Protected method handling events.
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168
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169 @param evt reference to the event (QEvent)
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170 @return flag indicating, if the event was handled (boolean)
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171 """
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172 if evt.type() == QEvent.Gesture:
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173 self.gestureEvent(evt)
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174 return True
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175
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176 return super().event(evt)
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177
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178 def gestureEvent(self, evt):
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179 """
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180 Protected method handling gesture events.
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181
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182 @param evt reference to the gesture event (QGestureEvent
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183 """
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184 pinch = evt.gesture(Qt.PinchGesture)
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185 if pinch:
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186 if pinch.state() == Qt.GestureStarted:
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187 pinch.setScaleFactor(self.__zoom() / 100)
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188 else:
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189 self.__doZoom(int(pinch.scaleFactor() * 100))
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190 evt.accept()
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191
0
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192 ############################################################################
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193 ## Private menu handling methods below.
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194 ############################################################################
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195
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196 def __adjustScrollBar(self, scrollBar, factor):
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197 """
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198 Private method to adjust a scrollbar by a certain factor.
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199
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200 @param scrollBar reference to the scrollbar object (QScrollBar)
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201 @param factor factor to adjust by (float)
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202 """
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203 scrollBar.setValue(int(factor * scrollBar.value()
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204 + ((factor - 1) * scrollBar.pageStep() / 2)))
0
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205
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206 def __levelForZoom(self, zoom):
0
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207 """
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208 Private method determining the zoom level index given a zoom factor.
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209
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210 @param zoom zoom factor (integer)
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211 @return index of zoom factor (integer)
0
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212 """
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213 try:
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214 index = SvgDiagram.ZoomLevels.index(zoom)
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215 except ValueError:
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216 for index in range(len(SvgDiagram.ZoomLevels)):
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217 if zoom <= SvgDiagram.ZoomLevels[index]:
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218 break
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219 return index
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220
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221 def __doZoom(self, value):
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222 """
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223 Public method to set the zoom value in percent.
0
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224
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225 @param value zoom value in percent (integer)
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226 """
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227 oldValue = self.__zoom()
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228 if value != oldValue:
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229 self.svgWidget.resize(value / 100 * self.svgWidget.sizeHint())
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230
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231 factor = value / oldValue
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232 self.__adjustScrollBar(self.svgView.horizontalScrollBar(), factor)
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233 self.__adjustScrollBar(self.svgView.verticalScrollBar(), factor)
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234
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235 self.__zoomWidget.setValue(value)
0
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236
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237 def __zoomIn(self):
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238 """
2334
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239 Private method to zoom into the SVG.
0
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240 """
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241 index = self.__levelForZoom(self.__zoom())
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242 if index < len(SvgDiagram.ZoomLevels) - 1:
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243 self.__doZoom(SvgDiagram.ZoomLevels[index + 1])
0
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244
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245 def __zoomOut(self):
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246 """
2334
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247 Private method to zoom out of the SVG.
0
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248 """
2334
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249 index = self.__levelForZoom(self.__zoom())
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250 if index > 0:
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diff changeset
251 self.__doZoom(SvgDiagram.ZoomLevels[index - 1])
0
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parents:
diff changeset
252
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
253 def __zoomReset(self):
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
254 """
2334
fc69ad77e18a Introduced a zoom widget in the status bar of several windows.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2302
diff changeset
255 Private method to reset the zoom value.
0
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
256 """
2334
fc69ad77e18a Introduced a zoom widget in the status bar of several windows.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2302
diff changeset
257 self.__doZoom(SvgDiagram.ZoomLevels[SvgDiagram.ZoomLevelDefault])
0
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parents:
diff changeset
258
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
259 def __zoom(self):
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
260 """
2334
fc69ad77e18a Introduced a zoom widget in the status bar of several windows.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2302
diff changeset
261 Public method to get the current zoom factor in percent.
fc69ad77e18a Introduced a zoom widget in the status bar of several windows.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2302
diff changeset
262
fc69ad77e18a Introduced a zoom widget in the status bar of several windows.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2302
diff changeset
263 @return current zoom factor in percent (integer)
0
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
264 """
2334
fc69ad77e18a Introduced a zoom widget in the status bar of several windows.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2302
diff changeset
265 return int(self.svgWidget.width() / self.svgWidget.sizeHint().width() * 100.0)
0
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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266
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
267 def __printDiagram(self):
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
268 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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269 Private slot called to print the diagram.
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parents:
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270 """
945
8cd4d08fa9f6 Made code mostly PEP 8 compliant (except all whitespace and line length).
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 791
diff changeset
271 printer = QPrinter(mode=QPrinter.ScreenResolution)
0
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parents:
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272 printer.setFullPage(True)
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parents:
diff changeset
273 if Preferences.getPrinter("ColorMode"):
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parents:
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274 printer.setColorMode(QPrinter.Color)
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parents:
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275 else:
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parents:
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276 printer.setColorMode(QPrinter.GrayScale)
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parents:
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277 if Preferences.getPrinter("FirstPageFirst"):
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parents:
diff changeset
278 printer.setPageOrder(QPrinter.FirstPageFirst)
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parents:
diff changeset
279 else:
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parents:
diff changeset
280 printer.setPageOrder(QPrinter.LastPageFirst)
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parents:
diff changeset
281 printer.setPrinterName(Preferences.getPrinter("PrinterName"))
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parents:
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282
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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283 printDialog = QPrintDialog(printer, self)
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parents:
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284 if printDialog.exec_():
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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285 self.__print(printer)
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parents:
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286
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
287 def __printPreviewDiagram(self):
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parents:
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288 """
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parents:
diff changeset
289 Private slot called to show a print preview of the diagram.
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parents:
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290 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
291 from PyQt4.QtGui import QPrintPreviewDialog
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parents:
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292
945
8cd4d08fa9f6 Made code mostly PEP 8 compliant (except all whitespace and line length).
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parents: 791
diff changeset
293 printer = QPrinter(mode=QPrinter.ScreenResolution)
0
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parents:
diff changeset
294 printer.setFullPage(True)
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parents:
diff changeset
295 if Preferences.getPrinter("ColorMode"):
de9c2efb9d02 Started porting eric4 to Python3
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parents:
diff changeset
296 printer.setColorMode(QPrinter.Color)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
297 else:
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parents:
diff changeset
298 printer.setColorMode(QPrinter.GrayScale)
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parents:
diff changeset
299 if Preferences.getPrinter("FirstPageFirst"):
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parents:
diff changeset
300 printer.setPageOrder(QPrinter.FirstPageFirst)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
301 else:
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parents:
diff changeset
302 printer.setPageOrder(QPrinter.LastPageFirst)
1155
4cbef040f07e Fixed issues setting the printer margins correctly.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1131
diff changeset
303 printer.setPageMargins(
4cbef040f07e Fixed issues setting the printer margins correctly.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1131
diff changeset
304 Preferences.getPrinter("LeftMargin") * 10,
4cbef040f07e Fixed issues setting the printer margins correctly.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1131
diff changeset
305 Preferences.getPrinter("TopMargin") * 10,
4cbef040f07e Fixed issues setting the printer margins correctly.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1131
diff changeset
306 Preferences.getPrinter("RightMargin") * 10,
4cbef040f07e Fixed issues setting the printer margins correctly.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1131
diff changeset
307 Preferences.getPrinter("BottomMargin") * 10,
4cbef040f07e Fixed issues setting the printer margins correctly.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1131
diff changeset
308 QPrinter.Millimeter
4cbef040f07e Fixed issues setting the printer margins correctly.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1131
diff changeset
309 )
0
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
310 printer.setPrinterName(Preferences.getPrinter("PrinterName"))
de9c2efb9d02 Started porting eric4 to Python3
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parents:
diff changeset
311
de9c2efb9d02 Started porting eric4 to Python3
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parents:
diff changeset
312 preview = QPrintPreviewDialog(printer, self)
483
ca7d8599a575 Continued porting signal/slot usage to the new API.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 458
diff changeset
313 preview.paintRequested[QPrinter].connect(self.__print)
0
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parents:
diff changeset
314 preview.exec_()
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parents:
diff changeset
315
de9c2efb9d02 Started porting eric4 to Python3
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parents:
diff changeset
316 def __print(self, printer):
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
317 """
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
318 Private slot to the actual printing.
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
319
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
320 @param printer reference to the printer object (QPrinter)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
321 """
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
322 painter = QPainter()
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
323 painter.begin(printer)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
324
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
325 # calculate margin and width of printout
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
326 font = QFont("times", 10)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
327 painter.setFont(font)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
328 fm = painter.fontMetrics()
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
329 fontHeight = fm.lineSpacing()
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
330 marginX = printer.pageRect().x() - printer.paperRect().x()
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
331 marginX = \
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
332 Preferences.getPrinter("LeftMargin") * int(printer.resolution() / 2.54) \
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
333 - marginX
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
334 marginY = printer.pageRect().y() - printer.paperRect().y()
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
335 marginY = \
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
336 Preferences.getPrinter("TopMargin") * int(printer.resolution() / 2.54) \
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
337 - marginY
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
338
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
339 width = printer.width() - marginX \
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
340 - Preferences.getPrinter("RightMargin") * int(printer.resolution() / 2.54)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
341 height = printer.height() - fontHeight - 4 - marginY \
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
342 - Preferences.getPrinter("BottomMargin") * int(printer.resolution() / 2.54)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
343
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
344 # write a foot note
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
345 s = self.trUtf8("Diagram: {0}").format(self.getDiagramName())
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
346 tc = QColor(50, 50, 50)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
347 painter.setPen(tc)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
348 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
349 painter.drawLine(marginX, marginY + height + 2,
0
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
350 marginX + width, marginY + height + 2)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
351 painter.setFont(font)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
352 painter.drawText(marginX, marginY + height + 4, width,
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
353 fontHeight, Qt.AlignRight, s)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
354
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
355 # render the diagram
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
356 painter.setViewport(marginX, marginY, width, height)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
357 self.svgWidget.renderer().render(painter)
458
1695e7a2db54 Continued porting signal/slot usage to the new API.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 454
diff changeset
358 painter.end()

eric ide

mercurial