Mercurial Repositories > eric / file comparison
comparison: eric7/Graphics/PixmapDiagram.py
eric7/Graphics/PixmapDiagram.py
- branch
- eric7
- changeset 8312
- 800c432b34c8
- parent 8298
- 83ddb87b3bc1
- child 8318
- 962bce857696
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| 8311:4e8b98454baa | 8312:800c432b34c8 |
|---|---|
| 1 # -*- coding: utf-8 -*- | |
| 2 | |
| 3 # Copyright (c) 2004 - 2021 Detlev Offenbach <detlev@die-offenbachs.de> | |
| 4 # | |
| 5 | |
| 6 """ | |
| 7 Module implementing a dialog showing a pixmap. | |
| 8 """ | |
| 9 | |
| 10 from PyQt5.QtCore import Qt, QSize, QEvent | |
| 11 from PyQt5.QtGui import QPalette, QImage, QPixmap, QPainter, QFont, QColor | |
| 12 from PyQt5.QtWidgets import ( | |
| 13 QLabel, QSizePolicy, QScrollArea, QAction, QMenu, QToolBar | |
| 14 ) | |
| 15 from PyQt5.QtPrintSupport import QPrinter, QPrintDialog | |
| 16 | |
| 17 from E5Gui import E5MessageBox | |
| 18 from E5Gui.E5MainWindow import E5MainWindow | |
| 19 from E5Gui.E5ZoomWidget import E5ZoomWidget | |
| 20 | |
| 21 import UI.Config | |
| 22 | |
| 23 import Preferences | |
| 24 | |
| 25 | |
| 26 class PixmapDiagram(E5MainWindow): | |
| 27 """ | |
| 28 Class implementing a dialog showing a pixmap. | |
| 29 """ | |
| 30 ZoomLevels = [ | |
| 31 1, 3, 5, 7, 9, | |
| 32 10, 20, 30, 50, 67, 80, 90, | |
| 33 100, | |
| 34 110, 120, 133, 150, 170, 200, 240, 300, 400, | |
| 35 500, 600, 700, 800, 900, 1000, | |
| 36 ] | |
| 37 ZoomLevelDefault = 100 | |
| 38 | |
| 39 def __init__(self, pixmap, parent=None, name=None): | |
| 40 """ | |
| 41 Constructor | |
| 42 | |
| 43 @param pixmap filename of a graphics file to show | |
| 44 @type str | |
| 45 @param parent parent widget of the view | |
| 46 @type QWidget | |
| 47 @param name name of the view widget | |
| 48 @type str | |
| 49 """ | |
| 50 super().__init__(parent) | |
| 51 if name: | |
| 52 self.setObjectName(name) | |
| 53 else: | |
| 54 self.setObjectName("PixmapDiagram") | |
| 55 self.setWindowTitle(self.tr("Pixmap-Viewer")) | |
| 56 | |
| 57 self.pixmapLabel = QLabel() | |
| 58 self.pixmapLabel.setObjectName("pixmapLabel") | |
| 59 self.pixmapLabel.setBackgroundRole(QPalette.ColorRole.Base) | |
| 60 self.pixmapLabel.setSizePolicy( | |
| 61 QSizePolicy.Policy.Ignored, QSizePolicy.Policy.Ignored) | |
| 62 self.pixmapLabel.setScaledContents(True) | |
| 63 | |
| 64 self.pixmapView = QScrollArea() | |
| 65 self.pixmapView.setObjectName("pixmapView") | |
| 66 self.pixmapView.setBackgroundRole(QPalette.ColorRole.Dark) | |
| 67 self.pixmapView.setWidget(self.pixmapLabel) | |
| 68 | |
| 69 self.setCentralWidget(self.pixmapView) | |
| 70 | |
| 71 self.__zoomWidget = E5ZoomWidget( | |
| 72 UI.PixmapCache.getPixmap("zoomOut"), | |
| 73 UI.PixmapCache.getPixmap("zoomIn"), | |
| 74 UI.PixmapCache.getPixmap("zoomReset"), self) | |
| 75 self.statusBar().addPermanentWidget(self.__zoomWidget) | |
| 76 self.__zoomWidget.setMapping( | |
| 77 PixmapDiagram.ZoomLevels, PixmapDiagram.ZoomLevelDefault) | |
| 78 self.__zoomWidget.valueChanged.connect(self.__doZoom) | |
| 79 | |
| 80 # polish up the dialog | |
| 81 self.resize(QSize(800, 600).expandedTo(self.minimumSizeHint())) | |
| 82 | |
| 83 self.pixmapfile = pixmap | |
| 84 self.status = self.__showPixmap(self.pixmapfile) | |
| 85 | |
| 86 self.__initActions() | |
| 87 self.__initContextMenu() | |
| 88 self.__initToolBars() | |
| 89 | |
| 90 self.grabGesture(Qt.GestureType.PinchGesture) | |
| 91 | |
| 92 def __initActions(self): | |
| 93 """ | |
| 94 Private method to initialize the view actions. | |
| 95 """ | |
| 96 self.closeAct = QAction( | |
| 97 UI.PixmapCache.getIcon("close"), | |
| 98 self.tr("Close"), self) | |
| 99 self.closeAct.triggered.connect(self.close) | |
| 100 | |
| 101 self.printAct = QAction( | |
| 102 UI.PixmapCache.getIcon("print"), | |
| 103 self.tr("Print"), self) | |
| 104 self.printAct.triggered.connect(self.__printDiagram) | |
| 105 | |
| 106 self.printPreviewAct = QAction( | |
| 107 UI.PixmapCache.getIcon("printPreview"), | |
| 108 self.tr("Print Preview"), self) | |
| 109 self.printPreviewAct.triggered.connect(self.__printPreviewDiagram) | |
| 110 | |
| 111 def __initContextMenu(self): | |
| 112 """ | |
| 113 Private method to initialize the context menu. | |
| 114 """ | |
| 115 self.__menu = QMenu(self) | |
| 116 self.__menu.addAction(self.closeAct) | |
| 117 self.__menu.addSeparator() | |
| 118 self.__menu.addAction(self.printPreviewAct) | |
| 119 self.__menu.addAction(self.printAct) | |
| 120 | |
| 121 self.setContextMenuPolicy(Qt.ContextMenuPolicy.CustomContextMenu) | |
| 122 self.customContextMenuRequested.connect(self.__showContextMenu) | |
| 123 | |
| 124 def __showContextMenu(self, coord): | |
| 125 """ | |
| 126 Private slot to show the context menu of the listview. | |
| 127 | |
| 128 @param coord the position of the mouse pointer | |
| 129 @type QPoint | |
| 130 """ | |
| 131 self.__menu.popup(self.mapToGlobal(coord)) | |
| 132 | |
| 133 def __initToolBars(self): | |
| 134 """ | |
| 135 Private method to populate the toolbars with our actions. | |
| 136 """ | |
| 137 self.windowToolBar = QToolBar(self.tr("Window"), self) | |
| 138 self.windowToolBar.setIconSize(UI.Config.ToolBarIconSize) | |
| 139 self.windowToolBar.addAction(self.closeAct) | |
| 140 | |
| 141 self.graphicsToolBar = QToolBar(self.tr("Graphics"), self) | |
| 142 self.graphicsToolBar.setIconSize(UI.Config.ToolBarIconSize) | |
| 143 self.graphicsToolBar.addAction(self.printPreviewAct) | |
| 144 self.graphicsToolBar.addAction(self.printAct) | |
| 145 | |
| 146 self.addToolBar(Qt.ToolBarArea.TopToolBarArea, self.windowToolBar) | |
| 147 self.addToolBar(Qt.ToolBarArea.TopToolBarArea, self.graphicsToolBar) | |
| 148 | |
| 149 def __showPixmap(self, filename): | |
| 150 """ | |
| 151 Private method to show a file. | |
| 152 | |
| 153 @param filename name of the file to be shown | |
| 154 @type str | |
| 155 @return flag indicating success | |
| 156 @rtype bool | |
| 157 """ | |
| 158 image = QImage(filename) | |
| 159 if image.isNull(): | |
| 160 E5MessageBox.warning( | |
| 161 self, | |
| 162 self.tr("Pixmap-Viewer"), | |
| 163 self.tr( | |
| 164 """<p>The file <b>{0}</b> cannot be displayed.""" | |
| 165 """ The format is not supported.</p>""").format(filename)) | |
| 166 return False | |
| 167 | |
| 168 self.pixmapLabel.setPixmap(QPixmap.fromImage(image)) | |
| 169 self.pixmapLabel.adjustSize() | |
| 170 return True | |
| 171 | |
| 172 def getDiagramName(self): | |
| 173 """ | |
| 174 Public method to retrieve a name for the diagram. | |
| 175 | |
| 176 @return name for the diagram | |
| 177 @rtype str | |
| 178 """ | |
| 179 return self.pixmapfile | |
| 180 | |
| 181 def getStatus(self): | |
| 182 """ | |
| 183 Public method to retrieve the status of the canvas. | |
| 184 | |
| 185 @return flag indicating a successful pixmap loading | |
| 186 @rtype bool | |
| 187 """ | |
| 188 return self.status | |
| 189 | |
| 190 def wheelEvent(self, evt): | |
| 191 """ | |
| 192 Protected method to handle wheel events. | |
| 193 | |
| 194 @param evt reference to the wheel event | |
| 195 @type QWheelEvent | |
| 196 """ | |
| 197 if evt.modifiers() & Qt.KeyboardModifier.ControlModifier: | |
| 198 delta = evt.angleDelta().y() | |
| 199 if delta < 0: | |
| 200 self.__zoomOut() | |
| 201 elif delta > 0: | |
| 202 self.__zoomIn() | |
| 203 evt.accept() | |
| 204 return | |
| 205 | |
| 206 super().wheelEvent(evt) | |
| 207 | |
| 208 def event(self, evt): | |
| 209 """ | |
| 210 Public method handling events. | |
| 211 | |
| 212 @param evt reference to the event | |
| 213 @type QEvent | |
| 214 @return flag indicating, if the event was handled | |
| 215 @rtype bool | |
| 216 """ | |
| 217 if evt.type() == QEvent.Type.Gesture: | |
| 218 self.gestureEvent(evt) | |
| 219 return True | |
| 220 | |
| 221 return super().event(evt) | |
| 222 | |
| 223 def gestureEvent(self, evt): | |
| 224 """ | |
| 225 Protected method handling gesture events. | |
| 226 | |
| 227 @param evt reference to the gesture event | |
| 228 @type QGestureEvent | |
| 229 """ | |
| 230 pinch = evt.gesture(Qt.GestureType.PinchGesture) | |
| 231 if pinch: | |
| 232 if pinch.state() == Qt.GestureState.GestureStarted: | |
| 233 pinch.setTotalScaleFactor(self.__zoom() / 100) | |
| 234 elif pinch.state() == Qt.GestureState.GestureUpdated: | |
| 235 self.__doZoom(int(pinch.totalScaleFactor() * 100)) | |
| 236 evt.accept() | |
| 237 | |
| 238 ########################################################################### | |
| 239 ## Private menu handling methods below. | |
| 240 ########################################################################### | |
| 241 | |
| 242 def __adjustScrollBar(self, scrollBar, factor): | |
| 243 """ | |
| 244 Private method to adjust a scrollbar by a certain factor. | |
| 245 | |
| 246 @param scrollBar reference to the scrollbar object | |
| 247 @type QScrollBar | |
| 248 @param factor factor to adjust by | |
| 249 @type float | |
| 250 """ | |
| 251 scrollBar.setValue(int(factor * scrollBar.value() + | |
| 252 ((factor - 1) * scrollBar.pageStep() / 2))) | |
| 253 | |
| 254 def __levelForZoom(self, zoom): | |
| 255 """ | |
| 256 Private method determining the zoom level index given a zoom factor. | |
| 257 | |
| 258 @param zoom zoom factor | |
| 259 @type int | |
| 260 @return index of zoom factor | |
| 261 @rtype int | |
| 262 """ | |
| 263 try: | |
| 264 index = PixmapDiagram.ZoomLevels.index(zoom) | |
| 265 except ValueError: | |
| 266 for index in range(len(PixmapDiagram.ZoomLevels)): | |
| 267 if zoom <= PixmapDiagram.ZoomLevels[index]: | |
| 268 break | |
| 269 return index | |
| 270 | |
| 271 def __doZoom(self, value): | |
| 272 """ | |
| 273 Private method to set the zoom value in percent. | |
| 274 | |
| 275 @param value zoom value in percent | |
| 276 @type int | |
| 277 """ | |
| 278 oldValue = self.__zoom() | |
| 279 if value != oldValue: | |
| 280 self.pixmapLabel.resize( | |
| 281 value / 100 * self.pixmapLabel.pixmap().size()) | |
| 282 | |
| 283 factor = value / oldValue | |
| 284 self.__adjustScrollBar( | |
| 285 self.pixmapView.horizontalScrollBar(), factor) | |
| 286 self.__adjustScrollBar( | |
| 287 self.pixmapView.verticalScrollBar(), factor) | |
| 288 | |
| 289 self.__zoomWidget.setValue(value) | |
| 290 | |
| 291 def __zoomIn(self): | |
| 292 """ | |
| 293 Private method to zoom into the pixmap. | |
| 294 """ | |
| 295 index = self.__levelForZoom(self.__zoom()) | |
| 296 if index < len(PixmapDiagram.ZoomLevels) - 1: | |
| 297 self.__doZoom(PixmapDiagram.ZoomLevels[index + 1]) | |
| 298 | |
| 299 def __zoomOut(self): | |
| 300 """ | |
| 301 Private method to zoom out of the pixmap. | |
| 302 """ | |
| 303 index = self.__levelForZoom(self.__zoom()) | |
| 304 if index > 0: | |
| 305 self.__doZoom(PixmapDiagram.ZoomLevels[index - 1]) | |
| 306 | |
| 307 def __zoomReset(self): | |
| 308 """ | |
| 309 Private method to reset the zoom value. | |
| 310 """ | |
| 311 self.__doZoom(PixmapDiagram.ZoomLevels[PixmapDiagram.ZoomLevelDefault]) | |
| 312 | |
| 313 def __zoom(self): | |
| 314 """ | |
| 315 Private method to get the current zoom factor in percent. | |
| 316 | |
| 317 @return current zoom factor in percent | |
| 318 @rtype int | |
| 319 """ | |
| 320 return int(self.pixmapLabel.width() / | |
| 321 self.pixmapLabel.pixmap().width() * 100.0) | |
| 322 | |
| 323 def __printDiagram(self): | |
| 324 """ | |
| 325 Private slot called to print the diagram. | |
| 326 """ | |
| 327 printer = QPrinter(mode=QPrinter.PrinterMode.ScreenResolution) | |
| 328 printer.setFullPage(True) | |
| 329 if Preferences.getPrinter("ColorMode"): | |
| 330 printer.setColorMode(QPrinter.ColorMode.Color) | |
| 331 else: | |
| 332 printer.setColorMode(QPrinter.ColorMode.GrayScale) | |
| 333 if Preferences.getPrinter("FirstPageFirst"): | |
| 334 printer.setPageOrder(QPrinter.PageOrder.FirstPageFirst) | |
| 335 else: | |
| 336 printer.setPageOrder(QPrinter.PageOrder.LastPageFirst) | |
| 337 printer.setPrinterName(Preferences.getPrinter("PrinterName")) | |
| 338 | |
| 339 printDialog = QPrintDialog(printer, self) | |
| 340 if printDialog.exec(): | |
| 341 self.__print(printer) | |
| 342 | |
| 343 def __printPreviewDiagram(self): | |
| 344 """ | |
| 345 Private slot called to show a print preview of the diagram. | |
| 346 """ | |
| 347 from PyQt5.QtPrintSupport import QPrintPreviewDialog | |
| 348 | |
| 349 printer = QPrinter(mode=QPrinter.PrinterMode.ScreenResolution) | |
| 350 printer.setFullPage(True) | |
| 351 if Preferences.getPrinter("ColorMode"): | |
| 352 printer.setColorMode(QPrinter.ColorMode.Color) | |
| 353 else: | |
| 354 printer.setColorMode(QPrinter.ColorMode.GrayScale) | |
| 355 if Preferences.getPrinter("FirstPageFirst"): | |
| 356 printer.setPageOrder(QPrinter.PageOrder.FirstPageFirst) | |
| 357 else: | |
| 358 printer.setPageOrder(QPrinter.PageOrder.LastPageFirst) | |
| 359 printer.setPageMargins( | |
| 360 Preferences.getPrinter("LeftMargin") * 10, | |
| 361 Preferences.getPrinter("TopMargin") * 10, | |
| 362 Preferences.getPrinter("RightMargin") * 10, | |
| 363 Preferences.getPrinter("BottomMargin") * 10, | |
| 364 QPrinter.Unit.Millimeter | |
| 365 ) | |
| 366 printer.setPrinterName(Preferences.getPrinter("PrinterName")) | |
| 367 | |
| 368 preview = QPrintPreviewDialog(printer, self) | |
| 369 preview.paintRequested[QPrinter].connect(self.__print) | |
| 370 preview.exec() | |
| 371 | |
| 372 def __print(self, printer): | |
| 373 """ | |
| 374 Private slot to the actual printing. | |
| 375 | |
| 376 @param printer reference to the printer object | |
| 377 @type QPrinter | |
| 378 """ | |
| 379 painter = QPainter() | |
| 380 painter.begin(printer) | |
| 381 | |
| 382 # calculate margin and width of printout | |
| 383 font = QFont("times", 10) | |
| 384 painter.setFont(font) | |
| 385 fm = painter.fontMetrics() | |
| 386 fontHeight = fm.lineSpacing() | |
| 387 marginX = ( | |
| 388 printer.pageLayout().paintRectPixels(printer.resolution()).x() - | |
| 389 printer.pageLayout().fullRectPixels(printer.resolution()).x() | |
| 390 ) | |
| 391 marginX = ( | |
| 392 Preferences.getPrinter("LeftMargin") * | |
| 393 int(printer.resolution() / 2.54) - marginX | |
| 394 ) | |
| 395 marginY = ( | |
| 396 printer.pageLayout().paintRectPixels(printer.resolution()).y() - | |
| 397 printer.pageLayout().fullRectPixels(printer.resolution()).y() | |
| 398 ) | |
| 399 marginY = ( | |
| 400 Preferences.getPrinter("TopMargin") * | |
| 401 int(printer.resolution() / 2.54) - marginY | |
| 402 ) | |
| 403 | |
| 404 width = ( | |
| 405 printer.width() - marginX - | |
| 406 Preferences.getPrinter("RightMargin") * | |
| 407 int(printer.resolution() / 2.54) | |
| 408 ) | |
| 409 height = ( | |
| 410 printer.height() - fontHeight - 4 - marginY - | |
| 411 Preferences.getPrinter("BottomMargin") * | |
| 412 int(printer.resolution() / 2.54) | |
| 413 ) | |
| 414 | |
| 415 # write a foot note | |
| 416 s = self.tr("Diagram: {0}").format(self.getDiagramName()) | |
| 417 tc = QColor(50, 50, 50) | |
| 418 painter.setPen(tc) | |
| 419 painter.drawRect(marginX, marginY, width, height) | |
| 420 painter.drawLine(marginX, marginY + height + 2, | |
| 421 marginX + width, marginY + height + 2) | |
| 422 painter.setFont(font) | |
| 423 painter.drawText(marginX, marginY + height + 4, width, | |
| 424 fontHeight, Qt.AlignmentFlag.AlignRight, s) | |
| 425 | |
| 426 # render the diagram | |
| 427 size = self.pixmapLabel.pixmap().size() | |
| 428 size.scale(QSize(width - 10, height - 10), # 5 px inner margin | |
| 429 Qt.AspectRatioMode.KeepAspectRatio) | |
| 430 painter.setViewport(marginX + 5, marginY + 5, | |
| 431 size.width(), size.height()) | |
| 432 painter.setWindow(self.pixmapLabel.pixmap().rect()) | |
| 433 painter.drawPixmap(0, 0, self.pixmapLabel.pixmap()) | |
| 434 painter.end() |
