--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/eric7/Graphics/SvgDiagram.py Thu Jul 07 11:23:56 2022 +0200
@@ -0,0 +1,398 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2008 - 2022 Detlev Offenbach <detlev@die-offenbachs.de>
+#
+
+"""
+Module implementing a dialog showing a SVG graphic.
+"""
+
+from PyQt6.QtCore import Qt, QSize, QEvent, QMarginsF
+from PyQt6.QtGui import QPalette, QPainter, QFont, QColor, QAction, QPageLayout
+from PyQt6.QtWidgets import QSizePolicy, QScrollArea, QMenu, QToolBar
+from PyQt6.QtPrintSupport import QPrinter, QPrintDialog
+from PyQt6.QtSvgWidgets import QSvgWidget
+
+from EricWidgets.EricMainWindow import EricMainWindow
+from EricWidgets.EricZoomWidget import EricZoomWidget
+
+import UI.Config
+
+import Preferences
+
+
+class SvgDiagram(EricMainWindow):
+ """
+ Class implementing a dialog showing a SVG graphic.
+ """
+ ZoomLevels = [
+ 1, 3, 5, 7, 9,
+ 10, 20, 30, 50, 67, 80, 90,
+ 100,
+ 110, 120, 133, 150, 170, 200, 240, 300, 400,
+ 500, 600, 700, 800, 900, 1000,
+ ]
+ ZoomLevelDefault = 100
+
+ def __init__(self, svgFile, parent=None, name=None):
+ """
+ Constructor
+
+ @param svgFile filename of a SVG graphics file to show
+ @type str
+ @param parent parent widget of the view
+ @type QWidget
+ @param name name of the view widget
+ @type str
+ """
+ super().__init__(parent)
+ if name:
+ self.setObjectName(name)
+ else:
+ self.setObjectName("SvgDiagram")
+ self.setWindowTitle(self.tr("SVG-Viewer"))
+
+ self.svgWidget = QSvgWidget()
+ self.svgWidget.setObjectName("svgWidget")
+ self.svgWidget.setBackgroundRole(QPalette.ColorRole.Base)
+ self.svgWidget.setSizePolicy(
+ QSizePolicy.Policy.Ignored, QSizePolicy.Policy.Ignored)
+
+ self.svgView = QScrollArea()
+ self.svgView.setObjectName("svgView")
+ self.svgView.setBackgroundRole(QPalette.ColorRole.Dark)
+ self.svgView.setWidget(self.svgWidget)
+
+ self.setCentralWidget(self.svgView)
+
+ self.__zoomWidget = EricZoomWidget(
+ UI.PixmapCache.getPixmap("zoomOut"),
+ UI.PixmapCache.getPixmap("zoomIn"),
+ UI.PixmapCache.getPixmap("zoomReset"), self)
+ self.statusBar().addPermanentWidget(self.__zoomWidget)
+ self.__zoomWidget.setMapping(
+ SvgDiagram.ZoomLevels, SvgDiagram.ZoomLevelDefault)
+ self.__zoomWidget.valueChanged.connect(self.__doZoom)
+
+ # polish up the dialog
+ self.resize(QSize(800, 600).expandedTo(self.minimumSizeHint()))
+
+ self.zoom = 1.0
+ self.svgFile = svgFile
+ self.svgWidget.load(self.svgFile)
+ self.svgWidget.resize(self.svgWidget.renderer().defaultSize())
+
+ self.__initActions()
+ self.__initContextMenu()
+ self.__initToolBars()
+
+ self.grabGesture(Qt.GestureType.PinchGesture)
+
+ def __initActions(self):
+ """
+ Private method to initialize the view actions.
+ """
+ self.closeAct = QAction(
+ UI.PixmapCache.getIcon("close"),
+ self.tr("Close"), self)
+ self.closeAct.triggered.connect(self.close)
+
+ self.printAct = QAction(
+ UI.PixmapCache.getIcon("print"),
+ self.tr("Print"), self)
+ self.printAct.triggered.connect(self.__printDiagram)
+
+ self.printPreviewAct = QAction(
+ UI.PixmapCache.getIcon("printPreview"),
+ self.tr("Print Preview"), self)
+ self.printPreviewAct.triggered.connect(self.__printPreviewDiagram)
+
+ def __initContextMenu(self):
+ """
+ Private method to initialize the context menu.
+ """
+ self.__menu = QMenu(self)
+ self.__menu.addAction(self.closeAct)
+ self.__menu.addSeparator()
+ self.__menu.addAction(self.printPreviewAct)
+ self.__menu.addAction(self.printAct)
+
+ self.setContextMenuPolicy(Qt.ContextMenuPolicy.CustomContextMenu)
+ self.customContextMenuRequested.connect(self.__showContextMenu)
+
+ def __showContextMenu(self, coord):
+ """
+ Private slot to show the context menu of the listview.
+
+ @param coord the position of the mouse pointer
+ @type QPoint
+ """
+ self.__menu.popup(self.mapToGlobal(coord))
+
+ def __initToolBars(self):
+ """
+ Private method to populate the toolbars with our actions.
+ """
+ self.windowToolBar = QToolBar(self.tr("Window"), self)
+ self.windowToolBar.setIconSize(UI.Config.ToolBarIconSize)
+ self.windowToolBar.addAction(self.closeAct)
+
+ self.graphicsToolBar = QToolBar(self.tr("Graphics"), self)
+ self.graphicsToolBar.setIconSize(UI.Config.ToolBarIconSize)
+ self.graphicsToolBar.addAction(self.printPreviewAct)
+ self.graphicsToolBar.addAction(self.printAct)
+
+ self.addToolBar(Qt.ToolBarArea.TopToolBarArea, self.windowToolBar)
+ self.addToolBar(Qt.ToolBarArea.TopToolBarArea, self.graphicsToolBar)
+
+ def getDiagramName(self):
+ """
+ Public method to retrieve a name for the diagram.
+
+ @return name for the diagram
+ @rtype str
+ """
+ return self.svgFile
+
+ def wheelEvent(self, evt):
+ """
+ Protected method to handle wheel events.
+
+ @param evt reference to the wheel event
+ @type QWheelEvent
+ """
+ if evt.modifiers() & Qt.KeyboardModifier.ControlModifier:
+ delta = evt.angleDelta().y()
+ if delta < 0:
+ self.__zoomOut()
+ elif delta > 0:
+ self.__zoomIn()
+ evt.accept()
+ return
+
+ super().wheelEvent(evt)
+
+ def event(self, evt):
+ """
+ Public method handling events.
+
+ @param evt reference to the event
+ @type QEvent
+ @return flag indicating, if the event was handled
+ @rtype bool
+ """
+ if evt.type() == QEvent.Type.Gesture:
+ self.gestureEvent(evt)
+ return True
+
+ return super().event(evt)
+
+ def gestureEvent(self, evt):
+ """
+ Protected method handling gesture events.
+
+ @param evt reference to the gesture event
+ @type QGestureEvent
+ """
+ pinch = evt.gesture(Qt.GestureType.PinchGesture)
+ if pinch:
+ if pinch.state() == Qt.GestureState.GestureStarted:
+ pinch.setTotalScaleFactor(self.__zoom() / 100)
+ elif pinch.state() == Qt.GestureState.GestureUpdated:
+ self.__doZoom(int(pinch.totalScaleFactor() * 100))
+ evt.accept()
+
+ ###########################################################################
+ ## Private menu handling methods below.
+ ###########################################################################
+
+ def __adjustScrollBar(self, scrollBar, factor):
+ """
+ Private method to adjust a scrollbar by a certain factor.
+
+ @param scrollBar reference to the scrollbar object
+ @type QScrollBar
+ @param factor factor to adjust by
+ @type float
+ """
+ scrollBar.setValue(
+ int(factor * scrollBar.value() +
+ ((factor - 1) * scrollBar.pageStep() / 2)))
+
+ def __levelForZoom(self, zoom):
+ """
+ Private method determining the zoom level index given a zoom factor.
+
+ @param zoom zoom factor
+ @type int
+ @return index of zoom factor
+ @rtype int
+ """
+ try:
+ index = SvgDiagram.ZoomLevels.index(zoom)
+ except ValueError:
+ for index in range(len(SvgDiagram.ZoomLevels)):
+ if zoom <= SvgDiagram.ZoomLevels[index]:
+ break
+ return index
+
+ def __doZoom(self, value):
+ """
+ Private method to set the zoom value in percent.
+
+ @param value zoom value in percent
+ @type int
+ """
+ oldValue = self.__zoom()
+ if value != oldValue:
+ self.svgWidget.resize(value / 100 * self.svgWidget.sizeHint())
+
+ factor = value / oldValue
+ self.__adjustScrollBar(self.svgView.horizontalScrollBar(), factor)
+ self.__adjustScrollBar(self.svgView.verticalScrollBar(), factor)
+
+ self.__zoomWidget.setValue(value)
+
+ def __zoomIn(self):
+ """
+ Private method to zoom into the SVG.
+ """
+ index = self.__levelForZoom(self.__zoom())
+ if index < len(SvgDiagram.ZoomLevels) - 1:
+ self.__doZoom(SvgDiagram.ZoomLevels[index + 1])
+
+ def __zoomOut(self):
+ """
+ Private method to zoom out of the SVG.
+ """
+ index = self.__levelForZoom(self.__zoom())
+ if index > 0:
+ self.__doZoom(SvgDiagram.ZoomLevels[index - 1])
+
+ def __zoomReset(self):
+ """
+ Private method to reset the zoom value.
+ """
+ self.__doZoom(SvgDiagram.ZoomLevels[SvgDiagram.ZoomLevelDefault])
+
+ def __zoom(self):
+ """
+ Private method to get the current zoom factor in percent.
+
+ @return current zoom factor in percent
+ @rtype int
+ """
+ return int(self.svgWidget.width() /
+ self.svgWidget.sizeHint().width() * 100.0)
+
+ def __printDiagram(self):
+ """
+ Private slot called to print the diagram.
+ """
+ printer = QPrinter(mode=QPrinter.PrinterMode.ScreenResolution)
+ printer.setFullPage(True)
+ if Preferences.getPrinter("ColorMode"):
+ printer.setColorMode(QPrinter.ColorMode.Color)
+ else:
+ printer.setColorMode(QPrinter.ColorMode.GrayScale)
+ if Preferences.getPrinter("FirstPageFirst"):
+ printer.setPageOrder(QPrinter.PageOrder.FirstPageFirst)
+ else:
+ printer.setPageOrder(QPrinter.PageOrder.LastPageFirst)
+ printerName = Preferences.getPrinter("PrinterName")
+ if printerName:
+ printer.setPrinterName(printerName)
+
+ printDialog = QPrintDialog(printer, self)
+ if printDialog.exec():
+ self.__print(printer)
+
+ def __printPreviewDiagram(self):
+ """
+ Private slot called to show a print preview of the diagram.
+ """
+ from PyQt6.QtPrintSupport import QPrintPreviewDialog
+
+ printer = QPrinter(mode=QPrinter.PrinterMode.ScreenResolution)
+ printer.setFullPage(True)
+ if Preferences.getPrinter("ColorMode"):
+ printer.setColorMode(QPrinter.ColorMode.Color)
+ else:
+ printer.setColorMode(QPrinter.ColorMode.GrayScale)
+ if Preferences.getPrinter("FirstPageFirst"):
+ printer.setPageOrder(QPrinter.PageOrder.FirstPageFirst)
+ else:
+ printer.setPageOrder(QPrinter.PageOrder.LastPageFirst)
+ printer.setPageMargins(QMarginsF(
+ Preferences.getPrinter("LeftMargin") * 10,
+ Preferences.getPrinter("TopMargin") * 10,
+ Preferences.getPrinter("RightMargin") * 10,
+ Preferences.getPrinter("BottomMargin") * 10),
+ QPageLayout.Unit.Millimeter
+ )
+ printerName = Preferences.getPrinter("PrinterName")
+ if printerName:
+ printer.setPrinterName(printerName)
+
+ preview = QPrintPreviewDialog(printer, self)
+ preview.paintRequested[QPrinter].connect(self.__print)
+ preview.exec()
+
+ def __print(self, printer):
+ """
+ Private slot to the actual printing.
+
+ @param printer reference to the printer object
+ @type QPrinter
+ """
+ painter = QPainter()
+ painter.begin(printer)
+
+ # calculate margin and width of printout
+ font = QFont(["times"], 10)
+ painter.setFont(font)
+ fm = painter.fontMetrics()
+ fontHeight = fm.lineSpacing()
+ marginX = (
+ printer.pageLayout().paintRectPixels(printer.resolution()).x() -
+ printer.pageLayout().fullRectPixels(printer.resolution()).x()
+ )
+ marginX = (
+ Preferences.getPrinter("LeftMargin") *
+ int(printer.resolution() / 2.54) - marginX
+ )
+ marginY = (
+ printer.pageLayout().paintRectPixels(printer.resolution()).y() -
+ printer.pageLayout().fullRectPixels(printer.resolution()).y()
+ )
+ marginY = (
+ Preferences.getPrinter("TopMargin") *
+ int(printer.resolution() / 2.54) - marginY
+ )
+
+ width = (
+ printer.width() - marginX -
+ Preferences.getPrinter("RightMargin") *
+ int(printer.resolution() / 2.54)
+ )
+ height = (
+ printer.height() - fontHeight - 4 - marginY -
+ Preferences.getPrinter("BottomMargin") *
+ int(printer.resolution() / 2.54)
+ )
+
+ # write a foot note
+ s = self.tr("Diagram: {0}").format(self.getDiagramName())
+ tc = QColor(50, 50, 50)
+ painter.setPen(tc)
+ painter.drawRect(marginX, marginY, width, height)
+ painter.drawLine(marginX, marginY + height + 2,
+ marginX + width, marginY + height + 2)
+ painter.setFont(font)
+ painter.drawText(marginX, marginY + height + 4, width,
+ fontHeight, Qt.AlignmentFlag.AlignRight, s)
+
+ # render the diagram
+ painter.setViewport(marginX, marginY, width, height)
+ self.svgWidget.renderer().render(painter)
+ painter.end()
