Mercurial Repositories > eric / file comparison
comparison: src/eric7/Graphics/SvgDiagram.py
src/eric7/Graphics/SvgDiagram.py
- branch
- eric7
- changeset 9209
- b99e7fd55fd3
- parent 8881
- 54e42bc2437a
- child 9221
- bf71ee032bb4
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replaced
| 9208:3fc8dfeb6ebe | 9209:b99e7fd55fd3 |
|---|---|
| 1 # -*- coding: utf-8 -*- | |
| 2 | |
| 3 # Copyright (c) 2008 - 2022 Detlev Offenbach <detlev@die-offenbachs.de> | |
| 4 # | |
| 5 | |
| 6 """ | |
| 7 Module implementing a dialog showing a SVG graphic. | |
| 8 """ | |
| 9 | |
| 10 from PyQt6.QtCore import Qt, QSize, QEvent, QMarginsF | |
| 11 from PyQt6.QtGui import QPalette, QPainter, QFont, QColor, QAction, QPageLayout | |
| 12 from PyQt6.QtWidgets import QSizePolicy, QScrollArea, QMenu, QToolBar | |
| 13 from PyQt6.QtPrintSupport import QPrinter, QPrintDialog | |
| 14 from PyQt6.QtSvgWidgets import QSvgWidget | |
| 15 | |
| 16 from EricWidgets.EricMainWindow import EricMainWindow | |
| 17 from EricWidgets.EricZoomWidget import EricZoomWidget | |
| 18 | |
| 19 import UI.Config | |
| 20 | |
| 21 import Preferences | |
| 22 | |
| 23 | |
| 24 class SvgDiagram(EricMainWindow): | |
| 25 """ | |
| 26 Class implementing a dialog showing a SVG graphic. | |
| 27 """ | |
| 28 ZoomLevels = [ | |
| 29 1, 3, 5, 7, 9, | |
| 30 10, 20, 30, 50, 67, 80, 90, | |
| 31 100, | |
| 32 110, 120, 133, 150, 170, 200, 240, 300, 400, | |
| 33 500, 600, 700, 800, 900, 1000, | |
| 34 ] | |
| 35 ZoomLevelDefault = 100 | |
| 36 | |
| 37 def __init__(self, svgFile, parent=None, name=None): | |
| 38 """ | |
| 39 Constructor | |
| 40 | |
| 41 @param svgFile filename of a SVG graphics file to show | |
| 42 @type str | |
| 43 @param parent parent widget of the view | |
| 44 @type QWidget | |
| 45 @param name name of the view widget | |
| 46 @type str | |
| 47 """ | |
| 48 super().__init__(parent) | |
| 49 if name: | |
| 50 self.setObjectName(name) | |
| 51 else: | |
| 52 self.setObjectName("SvgDiagram") | |
| 53 self.setWindowTitle(self.tr("SVG-Viewer")) | |
| 54 | |
| 55 self.svgWidget = QSvgWidget() | |
| 56 self.svgWidget.setObjectName("svgWidget") | |
| 57 self.svgWidget.setBackgroundRole(QPalette.ColorRole.Base) | |
| 58 self.svgWidget.setSizePolicy( | |
| 59 QSizePolicy.Policy.Ignored, QSizePolicy.Policy.Ignored) | |
| 60 | |
| 61 self.svgView = QScrollArea() | |
| 62 self.svgView.setObjectName("svgView") | |
| 63 self.svgView.setBackgroundRole(QPalette.ColorRole.Dark) | |
| 64 self.svgView.setWidget(self.svgWidget) | |
| 65 | |
| 66 self.setCentralWidget(self.svgView) | |
| 67 | |
| 68 self.__zoomWidget = EricZoomWidget( | |
| 69 UI.PixmapCache.getPixmap("zoomOut"), | |
| 70 UI.PixmapCache.getPixmap("zoomIn"), | |
| 71 UI.PixmapCache.getPixmap("zoomReset"), self) | |
| 72 self.statusBar().addPermanentWidget(self.__zoomWidget) | |
| 73 self.__zoomWidget.setMapping( | |
| 74 SvgDiagram.ZoomLevels, SvgDiagram.ZoomLevelDefault) | |
| 75 self.__zoomWidget.valueChanged.connect(self.__doZoom) | |
| 76 | |
| 77 # polish up the dialog | |
| 78 self.resize(QSize(800, 600).expandedTo(self.minimumSizeHint())) | |
| 79 | |
| 80 self.zoom = 1.0 | |
| 81 self.svgFile = svgFile | |
| 82 self.svgWidget.load(self.svgFile) | |
| 83 self.svgWidget.resize(self.svgWidget.renderer().defaultSize()) | |
| 84 | |
| 85 self.__initActions() | |
| 86 self.__initContextMenu() | |
| 87 self.__initToolBars() | |
| 88 | |
| 89 self.grabGesture(Qt.GestureType.PinchGesture) | |
| 90 | |
| 91 def __initActions(self): | |
| 92 """ | |
| 93 Private method to initialize the view actions. | |
| 94 """ | |
| 95 self.closeAct = QAction( | |
| 96 UI.PixmapCache.getIcon("close"), | |
| 97 self.tr("Close"), self) | |
| 98 self.closeAct.triggered.connect(self.close) | |
| 99 | |
| 100 self.printAct = QAction( | |
| 101 UI.PixmapCache.getIcon("print"), | |
| 102 self.tr("Print"), self) | |
| 103 self.printAct.triggered.connect(self.__printDiagram) | |
| 104 | |
| 105 self.printPreviewAct = QAction( | |
| 106 UI.PixmapCache.getIcon("printPreview"), | |
| 107 self.tr("Print Preview"), self) | |
| 108 self.printPreviewAct.triggered.connect(self.__printPreviewDiagram) | |
| 109 | |
| 110 def __initContextMenu(self): | |
| 111 """ | |
| 112 Private method to initialize the context menu. | |
| 113 """ | |
| 114 self.__menu = QMenu(self) | |
| 115 self.__menu.addAction(self.closeAct) | |
| 116 self.__menu.addSeparator() | |
| 117 self.__menu.addAction(self.printPreviewAct) | |
| 118 self.__menu.addAction(self.printAct) | |
| 119 | |
| 120 self.setContextMenuPolicy(Qt.ContextMenuPolicy.CustomContextMenu) | |
| 121 self.customContextMenuRequested.connect(self.__showContextMenu) | |
| 122 | |
| 123 def __showContextMenu(self, coord): | |
| 124 """ | |
| 125 Private slot to show the context menu of the listview. | |
| 126 | |
| 127 @param coord the position of the mouse pointer | |
| 128 @type QPoint | |
| 129 """ | |
| 130 self.__menu.popup(self.mapToGlobal(coord)) | |
| 131 | |
| 132 def __initToolBars(self): | |
| 133 """ | |
| 134 Private method to populate the toolbars with our actions. | |
| 135 """ | |
| 136 self.windowToolBar = QToolBar(self.tr("Window"), self) | |
| 137 self.windowToolBar.setIconSize(UI.Config.ToolBarIconSize) | |
| 138 self.windowToolBar.addAction(self.closeAct) | |
| 139 | |
| 140 self.graphicsToolBar = QToolBar(self.tr("Graphics"), self) | |
| 141 self.graphicsToolBar.setIconSize(UI.Config.ToolBarIconSize) | |
| 142 self.graphicsToolBar.addAction(self.printPreviewAct) | |
| 143 self.graphicsToolBar.addAction(self.printAct) | |
| 144 | |
| 145 self.addToolBar(Qt.ToolBarArea.TopToolBarArea, self.windowToolBar) | |
| 146 self.addToolBar(Qt.ToolBarArea.TopToolBarArea, self.graphicsToolBar) | |
| 147 | |
| 148 def getDiagramName(self): | |
| 149 """ | |
| 150 Public method to retrieve a name for the diagram. | |
| 151 | |
| 152 @return name for the diagram | |
| 153 @rtype str | |
| 154 """ | |
| 155 return self.svgFile | |
| 156 | |
| 157 def wheelEvent(self, evt): | |
| 158 """ | |
| 159 Protected method to handle wheel events. | |
| 160 | |
| 161 @param evt reference to the wheel event | |
| 162 @type QWheelEvent | |
| 163 """ | |
| 164 if evt.modifiers() & Qt.KeyboardModifier.ControlModifier: | |
| 165 delta = evt.angleDelta().y() | |
| 166 if delta < 0: | |
| 167 self.__zoomOut() | |
| 168 elif delta > 0: | |
| 169 self.__zoomIn() | |
| 170 evt.accept() | |
| 171 return | |
| 172 | |
| 173 super().wheelEvent(evt) | |
| 174 | |
| 175 def event(self, evt): | |
| 176 """ | |
| 177 Public method handling events. | |
| 178 | |
| 179 @param evt reference to the event | |
| 180 @type QEvent | |
| 181 @return flag indicating, if the event was handled | |
| 182 @rtype bool | |
| 183 """ | |
| 184 if evt.type() == QEvent.Type.Gesture: | |
| 185 self.gestureEvent(evt) | |
| 186 return True | |
| 187 | |
| 188 return super().event(evt) | |
| 189 | |
| 190 def gestureEvent(self, evt): | |
| 191 """ | |
| 192 Protected method handling gesture events. | |
| 193 | |
| 194 @param evt reference to the gesture event | |
| 195 @type QGestureEvent | |
| 196 """ | |
| 197 pinch = evt.gesture(Qt.GestureType.PinchGesture) | |
| 198 if pinch: | |
| 199 if pinch.state() == Qt.GestureState.GestureStarted: | |
| 200 pinch.setTotalScaleFactor(self.__zoom() / 100) | |
| 201 elif pinch.state() == Qt.GestureState.GestureUpdated: | |
| 202 self.__doZoom(int(pinch.totalScaleFactor() * 100)) | |
| 203 evt.accept() | |
| 204 | |
| 205 ########################################################################### | |
| 206 ## Private menu handling methods below. | |
| 207 ########################################################################### | |
| 208 | |
| 209 def __adjustScrollBar(self, scrollBar, factor): | |
| 210 """ | |
| 211 Private method to adjust a scrollbar by a certain factor. | |
| 212 | |
| 213 @param scrollBar reference to the scrollbar object | |
| 214 @type QScrollBar | |
| 215 @param factor factor to adjust by | |
| 216 @type float | |
| 217 """ | |
| 218 scrollBar.setValue( | |
| 219 int(factor * scrollBar.value() + | |
| 220 ((factor - 1) * scrollBar.pageStep() / 2))) | |
| 221 | |
| 222 def __levelForZoom(self, zoom): | |
| 223 """ | |
| 224 Private method determining the zoom level index given a zoom factor. | |
| 225 | |
| 226 @param zoom zoom factor | |
| 227 @type int | |
| 228 @return index of zoom factor | |
| 229 @rtype int | |
| 230 """ | |
| 231 try: | |
| 232 index = SvgDiagram.ZoomLevels.index(zoom) | |
| 233 except ValueError: | |
| 234 for index in range(len(SvgDiagram.ZoomLevels)): | |
| 235 if zoom <= SvgDiagram.ZoomLevels[index]: | |
| 236 break | |
| 237 return index | |
| 238 | |
| 239 def __doZoom(self, value): | |
| 240 """ | |
| 241 Private method to set the zoom value in percent. | |
| 242 | |
| 243 @param value zoom value in percent | |
| 244 @type int | |
| 245 """ | |
| 246 oldValue = self.__zoom() | |
| 247 if value != oldValue: | |
| 248 self.svgWidget.resize(value / 100 * self.svgWidget.sizeHint()) | |
| 249 | |
| 250 factor = value / oldValue | |
| 251 self.__adjustScrollBar(self.svgView.horizontalScrollBar(), factor) | |
| 252 self.__adjustScrollBar(self.svgView.verticalScrollBar(), factor) | |
| 253 | |
| 254 self.__zoomWidget.setValue(value) | |
| 255 | |
| 256 def __zoomIn(self): | |
| 257 """ | |
| 258 Private method to zoom into the SVG. | |
| 259 """ | |
| 260 index = self.__levelForZoom(self.__zoom()) | |
| 261 if index < len(SvgDiagram.ZoomLevels) - 1: | |
| 262 self.__doZoom(SvgDiagram.ZoomLevels[index + 1]) | |
| 263 | |
| 264 def __zoomOut(self): | |
| 265 """ | |
| 266 Private method to zoom out of the SVG. | |
| 267 """ | |
| 268 index = self.__levelForZoom(self.__zoom()) | |
| 269 if index > 0: | |
| 270 self.__doZoom(SvgDiagram.ZoomLevels[index - 1]) | |
| 271 | |
| 272 def __zoomReset(self): | |
| 273 """ | |
| 274 Private method to reset the zoom value. | |
| 275 """ | |
| 276 self.__doZoom(SvgDiagram.ZoomLevels[SvgDiagram.ZoomLevelDefault]) | |
| 277 | |
| 278 def __zoom(self): | |
| 279 """ | |
| 280 Private method to get the current zoom factor in percent. | |
| 281 | |
| 282 @return current zoom factor in percent | |
| 283 @rtype int | |
| 284 """ | |
| 285 return int(self.svgWidget.width() / | |
| 286 self.svgWidget.sizeHint().width() * 100.0) | |
| 287 | |
| 288 def __printDiagram(self): | |
| 289 """ | |
| 290 Private slot called to print the diagram. | |
| 291 """ | |
| 292 printer = QPrinter(mode=QPrinter.PrinterMode.ScreenResolution) | |
| 293 printer.setFullPage(True) | |
| 294 if Preferences.getPrinter("ColorMode"): | |
| 295 printer.setColorMode(QPrinter.ColorMode.Color) | |
| 296 else: | |
| 297 printer.setColorMode(QPrinter.ColorMode.GrayScale) | |
| 298 if Preferences.getPrinter("FirstPageFirst"): | |
| 299 printer.setPageOrder(QPrinter.PageOrder.FirstPageFirst) | |
| 300 else: | |
| 301 printer.setPageOrder(QPrinter.PageOrder.LastPageFirst) | |
| 302 printerName = Preferences.getPrinter("PrinterName") | |
| 303 if printerName: | |
| 304 printer.setPrinterName(printerName) | |
| 305 | |
| 306 printDialog = QPrintDialog(printer, self) | |
| 307 if printDialog.exec(): | |
| 308 self.__print(printer) | |
| 309 | |
| 310 def __printPreviewDiagram(self): | |
| 311 """ | |
| 312 Private slot called to show a print preview of the diagram. | |
| 313 """ | |
| 314 from PyQt6.QtPrintSupport import QPrintPreviewDialog | |
| 315 | |
| 316 printer = QPrinter(mode=QPrinter.PrinterMode.ScreenResolution) | |
| 317 printer.setFullPage(True) | |
| 318 if Preferences.getPrinter("ColorMode"): | |
| 319 printer.setColorMode(QPrinter.ColorMode.Color) | |
| 320 else: | |
| 321 printer.setColorMode(QPrinter.ColorMode.GrayScale) | |
| 322 if Preferences.getPrinter("FirstPageFirst"): | |
| 323 printer.setPageOrder(QPrinter.PageOrder.FirstPageFirst) | |
| 324 else: | |
| 325 printer.setPageOrder(QPrinter.PageOrder.LastPageFirst) | |
| 326 printer.setPageMargins(QMarginsF( | |
| 327 Preferences.getPrinter("LeftMargin") * 10, | |
| 328 Preferences.getPrinter("TopMargin") * 10, | |
| 329 Preferences.getPrinter("RightMargin") * 10, | |
| 330 Preferences.getPrinter("BottomMargin") * 10), | |
| 331 QPageLayout.Unit.Millimeter | |
| 332 ) | |
| 333 printerName = Preferences.getPrinter("PrinterName") | |
| 334 if printerName: | |
| 335 printer.setPrinterName(printerName) | |
| 336 | |
| 337 preview = QPrintPreviewDialog(printer, self) | |
| 338 preview.paintRequested[QPrinter].connect(self.__print) | |
| 339 preview.exec() | |
| 340 | |
| 341 def __print(self, printer): | |
| 342 """ | |
| 343 Private slot to the actual printing. | |
| 344 | |
| 345 @param printer reference to the printer object | |
| 346 @type QPrinter | |
| 347 """ | |
| 348 painter = QPainter() | |
| 349 painter.begin(printer) | |
| 350 | |
| 351 # calculate margin and width of printout | |
| 352 font = QFont(["times"], 10) | |
| 353 painter.setFont(font) | |
| 354 fm = painter.fontMetrics() | |
| 355 fontHeight = fm.lineSpacing() | |
| 356 marginX = ( | |
| 357 printer.pageLayout().paintRectPixels(printer.resolution()).x() - | |
| 358 printer.pageLayout().fullRectPixels(printer.resolution()).x() | |
| 359 ) | |
| 360 marginX = ( | |
| 361 Preferences.getPrinter("LeftMargin") * | |
| 362 int(printer.resolution() / 2.54) - marginX | |
| 363 ) | |
| 364 marginY = ( | |
| 365 printer.pageLayout().paintRectPixels(printer.resolution()).y() - | |
| 366 printer.pageLayout().fullRectPixels(printer.resolution()).y() | |
| 367 ) | |
| 368 marginY = ( | |
| 369 Preferences.getPrinter("TopMargin") * | |
| 370 int(printer.resolution() / 2.54) - marginY | |
| 371 ) | |
| 372 | |
| 373 width = ( | |
| 374 printer.width() - marginX - | |
| 375 Preferences.getPrinter("RightMargin") * | |
| 376 int(printer.resolution() / 2.54) | |
| 377 ) | |
| 378 height = ( | |
| 379 printer.height() - fontHeight - 4 - marginY - | |
| 380 Preferences.getPrinter("BottomMargin") * | |
| 381 int(printer.resolution() / 2.54) | |
| 382 ) | |
| 383 | |
| 384 # write a foot note | |
| 385 s = self.tr("Diagram: {0}").format(self.getDiagramName()) | |
| 386 tc = QColor(50, 50, 50) | |
| 387 painter.setPen(tc) | |
| 388 painter.drawRect(marginX, marginY, width, height) | |
| 389 painter.drawLine(marginX, marginY + height + 2, | |
| 390 marginX + width, marginY + height + 2) | |
| 391 painter.setFont(font) | |
| 392 painter.drawText(marginX, marginY + height + 4, width, | |
| 393 fontHeight, Qt.AlignmentFlag.AlignRight, s) | |
| 394 | |
| 395 # render the diagram | |
| 396 painter.setViewport(marginX, marginY, width, height) | |
| 397 self.svgWidget.renderer().render(painter) | |
| 398 painter.end() |
