Mercurial Repositories > eric / file comparison
comparison: eric6/Graphics/PixmapDiagram.py
eric6/Graphics/PixmapDiagram.py
- changeset 6942
- 2602857055c5
- parent 6645
- ad476851d7e0
- child 7198
- 684261ef2165
equal
deleted
inserted
replaced
| 6941:f99d60d6b59b | 6942:2602857055c5 |
|---|---|
| 1 # -*- coding: utf-8 -*- | |
| 2 | |
| 3 # Copyright (c) 2004 - 2019 Detlev Offenbach <detlev@die-offenbachs.de> | |
| 4 # | |
| 5 | |
| 6 """ | |
| 7 Module implementing a dialog showing a pixmap. | |
| 8 """ | |
| 9 | |
| 10 from __future__ import unicode_literals | |
| 11 | |
| 12 from PyQt5.QtCore import Qt, QSize, QEvent | |
| 13 from PyQt5.QtGui import QPalette, QImage, QPixmap, QPainter, QFont, QColor | |
| 14 from PyQt5.QtWidgets import QLabel, QSizePolicy, QScrollArea, QAction, QMenu, \ | |
| 15 QToolBar | |
| 16 from PyQt5.QtPrintSupport import QPrinter, QPrintDialog | |
| 17 | |
| 18 from E5Gui import E5MessageBox | |
| 19 from E5Gui.E5MainWindow import E5MainWindow | |
| 20 from E5Gui.E5ZoomWidget import E5ZoomWidget | |
| 21 | |
| 22 import UI.Config | |
| 23 | |
| 24 import Preferences | |
| 25 from Globals import qVersionTuple | |
| 26 | |
| 27 | |
| 28 class PixmapDiagram(E5MainWindow): | |
| 29 """ | |
| 30 Class implementing a dialog showing a pixmap. | |
| 31 """ | |
| 32 ZoomLevels = [ | |
| 33 1, 3, 5, 7, 9, | |
| 34 10, 20, 30, 50, 67, 80, 90, | |
| 35 100, | |
| 36 110, 120, 133, 150, 170, 200, 240, 300, 400, | |
| 37 500, 600, 700, 800, 900, 1000, | |
| 38 ] | |
| 39 ZoomLevelDefault = 100 | |
| 40 | |
| 41 def __init__(self, pixmap, parent=None, name=None): | |
| 42 """ | |
| 43 Constructor | |
| 44 | |
| 45 @param pixmap filename of a graphics file to show (string) | |
| 46 @param parent parent widget of the view (QWidget) | |
| 47 @param name name of the view widget (string) | |
| 48 """ | |
| 49 super(PixmapDiagram, self).__init__(parent) | |
| 50 if name: | |
| 51 self.setObjectName(name) | |
| 52 else: | |
| 53 self.setObjectName("PixmapDiagram") | |
| 54 self.setWindowTitle(self.tr("Pixmap-Viewer")) | |
| 55 | |
| 56 self.pixmapLabel = QLabel() | |
| 57 self.pixmapLabel.setObjectName("pixmapLabel") | |
| 58 self.pixmapLabel.setBackgroundRole(QPalette.Base) | |
| 59 self.pixmapLabel.setSizePolicy( | |
| 60 QSizePolicy.Ignored, QSizePolicy.Ignored) | |
| 61 self.pixmapLabel.setScaledContents(True) | |
| 62 | |
| 63 self.pixmapView = QScrollArea() | |
| 64 self.pixmapView.setObjectName("pixmapView") | |
| 65 self.pixmapView.setBackgroundRole(QPalette.Dark) | |
| 66 self.pixmapView.setWidget(self.pixmapLabel) | |
| 67 | |
| 68 self.setCentralWidget(self.pixmapView) | |
| 69 | |
| 70 self.__zoomWidget = E5ZoomWidget( | |
| 71 UI.PixmapCache.getPixmap("zoomOut.png"), | |
| 72 UI.PixmapCache.getPixmap("zoomIn.png"), | |
| 73 UI.PixmapCache.getPixmap("zoomReset.png"), self) | |
| 74 self.statusBar().addPermanentWidget(self.__zoomWidget) | |
| 75 self.__zoomWidget.setMapping( | |
| 76 PixmapDiagram.ZoomLevels, PixmapDiagram.ZoomLevelDefault) | |
| 77 self.__zoomWidget.valueChanged.connect(self.__doZoom) | |
| 78 | |
| 79 # polish up the dialog | |
| 80 self.resize(QSize(800, 600).expandedTo(self.minimumSizeHint())) | |
| 81 | |
| 82 self.pixmapfile = pixmap | |
| 83 self.status = self.__showPixmap(self.pixmapfile) | |
| 84 | |
| 85 self.__initActions() | |
| 86 self.__initContextMenu() | |
| 87 self.__initToolBars() | |
| 88 | |
| 89 self.grabGesture(Qt.PinchGesture) | |
| 90 | |
| 91 def __initActions(self): | |
| 92 """ | |
| 93 Private method to initialize the view actions. | |
| 94 """ | |
| 95 self.closeAct = \ | |
| 96 QAction(UI.PixmapCache.getIcon("close.png"), | |
| 97 self.tr("Close"), self) | |
| 98 self.closeAct.triggered.connect(self.close) | |
| 99 | |
| 100 self.printAct = \ | |
| 101 QAction(UI.PixmapCache.getIcon("print.png"), | |
| 102 self.tr("Print"), self) | |
| 103 self.printAct.triggered.connect(self.__printDiagram) | |
| 104 | |
| 105 self.printPreviewAct = \ | |
| 106 QAction(UI.PixmapCache.getIcon("printPreview.png"), | |
| 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.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 (QPoint) | |
| 128 """ | |
| 129 self.__menu.popup(self.mapToGlobal(coord)) | |
| 130 | |
| 131 def __initToolBars(self): | |
| 132 """ | |
| 133 Private method to populate the toolbars with our actions. | |
| 134 """ | |
| 135 self.windowToolBar = QToolBar(self.tr("Window"), self) | |
| 136 self.windowToolBar.setIconSize(UI.Config.ToolBarIconSize) | |
| 137 self.windowToolBar.addAction(self.closeAct) | |
| 138 | |
| 139 self.graphicsToolBar = QToolBar(self.tr("Graphics"), self) | |
| 140 self.graphicsToolBar.setIconSize(UI.Config.ToolBarIconSize) | |
| 141 self.graphicsToolBar.addAction(self.printPreviewAct) | |
| 142 self.graphicsToolBar.addAction(self.printAct) | |
| 143 | |
| 144 self.addToolBar(Qt.TopToolBarArea, self.windowToolBar) | |
| 145 self.addToolBar(Qt.TopToolBarArea, self.graphicsToolBar) | |
| 146 | |
| 147 def __showPixmap(self, filename): | |
| 148 """ | |
| 149 Private method to show a file. | |
| 150 | |
| 151 @param filename name of the file to be shown (string) | |
| 152 @return flag indicating success (boolean) | |
| 153 """ | |
| 154 image = QImage(filename) | |
| 155 if image.isNull(): | |
| 156 E5MessageBox.warning( | |
| 157 self, | |
| 158 self.tr("Pixmap-Viewer"), | |
| 159 self.tr( | |
| 160 """<p>The file <b>{0}</b> cannot be displayed.""" | |
| 161 """ The format is not supported.</p>""").format(filename)) | |
| 162 return False | |
| 163 | |
| 164 self.pixmapLabel.setPixmap(QPixmap.fromImage(image)) | |
| 165 self.pixmapLabel.adjustSize() | |
| 166 return True | |
| 167 | |
| 168 def getDiagramName(self): | |
| 169 """ | |
| 170 Public method to retrieve a name for the diagram. | |
| 171 | |
| 172 @return name for the diagram | |
| 173 """ | |
| 174 return self.pixmapfile | |
| 175 | |
| 176 def getStatus(self): | |
| 177 """ | |
| 178 Public method to retrieve the status of the canvas. | |
| 179 | |
| 180 @return flag indicating a successful pixmap loading (boolean) | |
| 181 """ | |
| 182 return self.status | |
| 183 | |
| 184 def wheelEvent(self, evt): | |
| 185 """ | |
| 186 Protected method to handle wheel events. | |
| 187 | |
| 188 @param evt reference to the wheel event (QWheelEvent) | |
| 189 """ | |
| 190 if evt.modifiers() & Qt.ControlModifier: | |
| 191 if qVersionTuple() >= (5, 0, 0): | |
| 192 delta = evt.angleDelta().y() | |
| 193 else: | |
| 194 delta = evt.delta() | |
| 195 if delta < 0: | |
| 196 self.__zoomOut() | |
| 197 elif delta > 0: | |
| 198 self.__zoomIn() | |
| 199 evt.accept() | |
| 200 return | |
| 201 | |
| 202 super(PixmapDiagram, self).wheelEvent(evt) | |
| 203 | |
| 204 def event(self, evt): | |
| 205 """ | |
| 206 Public method handling events. | |
| 207 | |
| 208 @param evt reference to the event (QEvent) | |
| 209 @return flag indicating, if the event was handled (boolean) | |
| 210 """ | |
| 211 if evt.type() == QEvent.Gesture: | |
| 212 self.gestureEvent(evt) | |
| 213 return True | |
| 214 | |
| 215 return super(PixmapDiagram, self).event(evt) | |
| 216 | |
| 217 def gestureEvent(self, evt): | |
| 218 """ | |
| 219 Protected method handling gesture events. | |
| 220 | |
| 221 @param evt reference to the gesture event (QGestureEvent | |
| 222 """ | |
| 223 pinch = evt.gesture(Qt.PinchGesture) | |
| 224 if pinch: | |
| 225 if pinch.state() == Qt.GestureStarted: | |
| 226 pinch.setTotalScaleFactor(self.__zoom() / 100) | |
| 227 elif pinch.state() == Qt.GestureUpdated: | |
| 228 self.__doZoom(int(pinch.totalScaleFactor() * 100)) | |
| 229 evt.accept() | |
| 230 | |
| 231 ########################################################################### | |
| 232 ## Private menu handling methods below. | |
| 233 ########################################################################### | |
| 234 | |
| 235 def __adjustScrollBar(self, scrollBar, factor): | |
| 236 """ | |
| 237 Private method to adjust a scrollbar by a certain factor. | |
| 238 | |
| 239 @param scrollBar reference to the scrollbar object (QScrollBar) | |
| 240 @param factor factor to adjust by (float) | |
| 241 """ | |
| 242 scrollBar.setValue(int(factor * scrollBar.value() + | |
| 243 ((factor - 1) * scrollBar.pageStep() / 2))) | |
| 244 | |
| 245 def __levelForZoom(self, zoom): | |
| 246 """ | |
| 247 Private method determining the zoom level index given a zoom factor. | |
| 248 | |
| 249 @param zoom zoom factor (integer) | |
| 250 @return index of zoom factor (integer) | |
| 251 """ | |
| 252 try: | |
| 253 index = PixmapDiagram.ZoomLevels.index(zoom) | |
| 254 except ValueError: | |
| 255 for index in range(len(PixmapDiagram.ZoomLevels)): | |
| 256 if zoom <= PixmapDiagram.ZoomLevels[index]: | |
| 257 break | |
| 258 return index | |
| 259 | |
| 260 def __doZoom(self, value): | |
| 261 """ | |
| 262 Private method to set the zoom value in percent. | |
| 263 | |
| 264 @param value zoom value in percent (integer) | |
| 265 """ | |
| 266 oldValue = self.__zoom() | |
| 267 if value != oldValue: | |
| 268 self.pixmapLabel.resize( | |
| 269 value / 100 * self.pixmapLabel.pixmap().size()) | |
| 270 | |
| 271 factor = value / oldValue | |
| 272 self.__adjustScrollBar( | |
| 273 self.pixmapView.horizontalScrollBar(), factor) | |
| 274 self.__adjustScrollBar( | |
| 275 self.pixmapView.verticalScrollBar(), factor) | |
| 276 | |
| 277 self.__zoomWidget.setValue(value) | |
| 278 | |
| 279 def __zoomIn(self): | |
| 280 """ | |
| 281 Private method to zoom into the pixmap. | |
| 282 """ | |
| 283 index = self.__levelForZoom(self.__zoom()) | |
| 284 if index < len(PixmapDiagram.ZoomLevels) - 1: | |
| 285 self.__doZoom(PixmapDiagram.ZoomLevels[index + 1]) | |
| 286 | |
| 287 def __zoomOut(self): | |
| 288 """ | |
| 289 Private method to zoom out of the pixmap. | |
| 290 """ | |
| 291 index = self.__levelForZoom(self.__zoom()) | |
| 292 if index > 0: | |
| 293 self.__doZoom(PixmapDiagram.ZoomLevels[index - 1]) | |
| 294 | |
| 295 def __zoomReset(self): | |
| 296 """ | |
| 297 Private method to reset the zoom value. | |
| 298 """ | |
| 299 self.__doZoom(PixmapDiagram.ZoomLevels[PixmapDiagram.ZoomLevelDefault]) | |
| 300 | |
| 301 def __zoom(self): | |
| 302 """ | |
| 303 Private method to get the current zoom factor in percent. | |
| 304 | |
| 305 @return current zoom factor in percent (integer) | |
| 306 """ | |
| 307 return int(self.pixmapLabel.width() / | |
| 308 self.pixmapLabel.pixmap().width() * 100.0) | |
| 309 | |
| 310 def __printDiagram(self): | |
| 311 """ | |
| 312 Private slot called to print the diagram. | |
| 313 """ | |
| 314 printer = QPrinter(mode=QPrinter.ScreenResolution) | |
| 315 printer.setFullPage(True) | |
| 316 if Preferences.getPrinter("ColorMode"): | |
| 317 printer.setColorMode(QPrinter.Color) | |
| 318 else: | |
| 319 printer.setColorMode(QPrinter.GrayScale) | |
| 320 if Preferences.getPrinter("FirstPageFirst"): | |
| 321 printer.setPageOrder(QPrinter.FirstPageFirst) | |
| 322 else: | |
| 323 printer.setPageOrder(QPrinter.LastPageFirst) | |
| 324 printer.setPrinterName(Preferences.getPrinter("PrinterName")) | |
| 325 | |
| 326 printDialog = QPrintDialog(printer, self) | |
| 327 if printDialog.exec_(): | |
| 328 self.__print(printer) | |
| 329 | |
| 330 def __printPreviewDiagram(self): | |
| 331 """ | |
| 332 Private slot called to show a print preview of the diagram. | |
| 333 """ | |
| 334 from PyQt5.QtPrintSupport import QPrintPreviewDialog | |
| 335 | |
| 336 printer = QPrinter(mode=QPrinter.ScreenResolution) | |
| 337 printer.setFullPage(True) | |
| 338 if Preferences.getPrinter("ColorMode"): | |
| 339 printer.setColorMode(QPrinter.Color) | |
| 340 else: | |
| 341 printer.setColorMode(QPrinter.GrayScale) | |
| 342 if Preferences.getPrinter("FirstPageFirst"): | |
| 343 printer.setPageOrder(QPrinter.FirstPageFirst) | |
| 344 else: | |
| 345 printer.setPageOrder(QPrinter.LastPageFirst) | |
| 346 printer.setPageMargins( | |
| 347 Preferences.getPrinter("LeftMargin") * 10, | |
| 348 Preferences.getPrinter("TopMargin") * 10, | |
| 349 Preferences.getPrinter("RightMargin") * 10, | |
| 350 Preferences.getPrinter("BottomMargin") * 10, | |
| 351 QPrinter.Millimeter | |
| 352 ) | |
| 353 printer.setPrinterName(Preferences.getPrinter("PrinterName")) | |
| 354 | |
| 355 preview = QPrintPreviewDialog(printer, self) | |
| 356 preview.paintRequested[QPrinter].connect(self.__print) | |
| 357 preview.exec_() | |
| 358 | |
| 359 def __print(self, printer): | |
| 360 """ | |
| 361 Private slot to the actual printing. | |
| 362 | |
| 363 @param printer reference to the printer object (QPrinter) | |
| 364 """ | |
| 365 painter = QPainter() | |
| 366 painter.begin(printer) | |
| 367 | |
| 368 # calculate margin and width of printout | |
| 369 font = QFont("times", 10) | |
| 370 painter.setFont(font) | |
| 371 fm = painter.fontMetrics() | |
| 372 fontHeight = fm.lineSpacing() | |
| 373 marginX = printer.pageRect().x() - printer.paperRect().x() | |
| 374 marginX = Preferences.getPrinter("LeftMargin") * \ | |
| 375 int(printer.resolution() / 2.54) - marginX | |
| 376 marginY = printer.pageRect().y() - printer.paperRect().y() | |
| 377 marginY = Preferences.getPrinter("TopMargin") * \ | |
| 378 int(printer.resolution() / 2.54) - marginY | |
| 379 | |
| 380 width = printer.width() - marginX - \ | |
| 381 Preferences.getPrinter("RightMargin") * \ | |
| 382 int(printer.resolution() / 2.54) | |
| 383 height = printer.height() - fontHeight - 4 - marginY - \ | |
| 384 Preferences.getPrinter("BottomMargin") * \ | |
| 385 int(printer.resolution() / 2.54) | |
| 386 | |
| 387 # write a foot note | |
| 388 s = self.tr("Diagram: {0}").format(self.getDiagramName()) | |
| 389 tc = QColor(50, 50, 50) | |
| 390 painter.setPen(tc) | |
| 391 painter.drawRect(marginX, marginY, width, height) | |
| 392 painter.drawLine(marginX, marginY + height + 2, | |
| 393 marginX + width, marginY + height + 2) | |
| 394 painter.setFont(font) | |
| 395 painter.drawText(marginX, marginY + height + 4, width, | |
| 396 fontHeight, Qt.AlignRight, s) | |
| 397 | |
| 398 # render the diagram | |
| 399 size = self.pixmapLabel.pixmap().size() | |
| 400 size.scale(QSize(width - 10, height - 10), # 5 px inner margin | |
| 401 Qt.KeepAspectRatio) | |
| 402 painter.setViewport(marginX + 5, marginY + 5, | |
| 403 size.width(), size.height()) | |
| 404 painter.setWindow(self.pixmapLabel.pixmap().rect()) | |
| 405 painter.drawPixmap(0, 0, self.pixmapLabel.pixmap()) | |
| 406 painter.end() |
