--- a/src/eric7/EricGraphics/EricGraphicsView.py Wed Jul 13 11:16:20 2022 +0200
+++ b/src/eric7/EricGraphics/EricGraphicsView.py Wed Jul 13 14:55:47 2022 +0200
@@ -21,63 +21,87 @@
class EricGraphicsView(QGraphicsView):
"""
Class implementing a graphics view.
-
+
@signal zoomValueChanged(int) emitted to signal a change of the zoom value
"""
+
zoomValueChanged = pyqtSignal(int)
-
+
ZoomLevels = [
- 1, 3, 5, 7, 9,
- 10, 20, 30, 50, 67, 80, 90,
+ 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,
+ 110,
+ 120,
+ 133,
+ 150,
+ 170,
+ 200,
+ 240,
+ 300,
+ 400,
+ 500,
+ 600,
+ 700,
+ 800,
+ 900,
+ 1000,
]
ZoomLevelDefault = 100
-
+
def __init__(self, scene, parent=None):
"""
Constructor
-
+
@param scene reference to the scene object (QGraphicsScene)
@param parent parent widget (QWidget)
"""
super().__init__(scene, parent)
self.setObjectName("EricGraphicsView")
-
+
self.__initialSceneSize = self.scene().sceneRect().size()
self.setBackgroundBrush(QBrush(self.getBackgroundColor()))
self.setRenderHint(QPainter.RenderHint.Antialiasing, True)
self.setDragMode(QGraphicsView.DragMode.RubberBandDrag)
- self.setAlignment(
- Qt.AlignmentFlag.AlignLeft | Qt.AlignmentFlag.AlignTop)
+ self.setAlignment(Qt.AlignmentFlag.AlignLeft | Qt.AlignmentFlag.AlignTop)
self.setHorizontalScrollBarPolicy(Qt.ScrollBarPolicy.ScrollBarAlwaysOn)
self.setVerticalScrollBarPolicy(Qt.ScrollBarPolicy.ScrollBarAlwaysOn)
- self.setViewportUpdateMode(
- QGraphicsView.ViewportUpdateMode.SmartViewportUpdate)
-
- self.setWhatsThis(self.tr(
- "<b>Graphics View</b>\n"
- "<p>This graphics view is used to show a diagram. \n"
- "There are various actions available to manipulate the \n"
- "shown items.</p>\n"
- "<ul>\n"
- "<li>Clicking on an item selects it.</li>\n"
- "<li>Ctrl-clicking adds an item to the selection.</li>\n"
- "<li>Ctrl-clicking a selected item deselects it.</li>\n"
- "<li>Clicking on an empty spot of the canvas resets the selection."
- "</li>\n"
- "<li>Dragging the mouse over the canvas spans a rubberband to \n"
- "select multiple items.</li>\n"
- "<li>Dragging the mouse over a selected item moves the \n"
- "whole selection.</li>\n"
- "</ul>\n"
- ))
-
+ self.setViewportUpdateMode(QGraphicsView.ViewportUpdateMode.SmartViewportUpdate)
+
+ self.setWhatsThis(
+ self.tr(
+ "<b>Graphics View</b>\n"
+ "<p>This graphics view is used to show a diagram. \n"
+ "There are various actions available to manipulate the \n"
+ "shown items.</p>\n"
+ "<ul>\n"
+ "<li>Clicking on an item selects it.</li>\n"
+ "<li>Ctrl-clicking adds an item to the selection.</li>\n"
+ "<li>Ctrl-clicking a selected item deselects it.</li>\n"
+ "<li>Clicking on an empty spot of the canvas resets the selection."
+ "</li>\n"
+ "<li>Dragging the mouse over the canvas spans a rubberband to \n"
+ "select multiple items.</li>\n"
+ "<li>Dragging the mouse over a selected item moves the \n"
+ "whole selection.</li>\n"
+ "</ul>\n"
+ )
+ )
+
def getDrawingColors(self):
"""
Public method to get the configured drawing colors.
-
+
@return tuple containing the foreground and background colors
@rtype tuple of (QColor, QColor)
"""
@@ -87,34 +111,34 @@
drawingMode = "white_black"
else:
drawingMode = "black_white"
-
+
if drawingMode == "white_black":
return (QColor("#ffffff"), QColor("#262626"))
else:
return (QColor("#000000"), QColor("#ffffff"))
-
+
def getForegroundColor(self):
"""
Public method to get the configured foreground color.
-
+
@return foreground color
@rtype QColor
"""
return self.getDrawingColors()[0]
-
+
def getBackgroundColor(self):
"""
Public method to get the configured background color.
-
+
@return background color
@rtype QColor
"""
return self.getDrawingColors()[1]
-
+
def __levelForZoom(self, zoom):
"""
Private method determining the zoom level index given a zoom factor.
-
+
@param zoom zoom factor (integer)
@return index of zoom factor (integer)
"""
@@ -125,7 +149,7 @@
if zoom <= EricGraphicsView.ZoomLevels[index]:
break
return index
-
+
def zoomIn(self):
"""
Public method to zoom in.
@@ -133,7 +157,7 @@
index = self.__levelForZoom(self.zoom())
if index < len(EricGraphicsView.ZoomLevels) - 1:
self.setZoom(EricGraphicsView.ZoomLevels[index + 1])
-
+
def zoomOut(self):
"""
Public method to zoom out.
@@ -141,18 +165,17 @@
index = self.__levelForZoom(self.zoom())
if index > 0:
self.setZoom(EricGraphicsView.ZoomLevels[index - 1])
-
+
def zoomReset(self):
"""
Public method to handle the reset the zoom value.
"""
- self.setZoom(
- EricGraphicsView.ZoomLevels[EricGraphicsView.ZoomLevelDefault])
-
+ self.setZoom(EricGraphicsView.ZoomLevels[EricGraphicsView.ZoomLevelDefault])
+
def setZoom(self, value):
"""
Public method to set the zoom value in percent.
-
+
@param value zoom value in percent (integer)
"""
if value != self.zoom():
@@ -160,19 +183,19 @@
factor = value / 100.0
self.scale(factor, factor)
self.zoomValueChanged.emit(value)
-
+
def zoom(self):
"""
Public method to get the current zoom factor in percent.
-
+
@return current zoom factor in percent (integer)
"""
return int(self.transform().m11() * 100.0)
-
+
def resizeScene(self, amount, isWidth=True):
"""
Public method to resize the scene.
-
+
@param amount size increment (integer)
@param isWidth flag indicating width is to be resized (boolean)
"""
@@ -188,13 +211,13 @@
width = rect.width()
if height < rect.height():
height = rect.height()
-
+
self.setSceneSize(width, height)
-
+
def setSceneSize(self, width, height):
"""
Public method to set the scene size.
-
+
@param width width for the scene (real)
@param height height for the scene (real)
"""
@@ -202,11 +225,11 @@
rect.setHeight(height)
rect.setWidth(width)
self.scene().setSceneRect(rect)
-
+
def autoAdjustSceneSize(self, limit=False):
"""
Public method to adjust the scene size to the diagram size.
-
+
@param limit flag indicating to limit the scene to the
initial size (boolean)
"""
@@ -218,12 +241,12 @@
newWidth = size.width()
newHeight = size.height()
self.setSceneSize(newWidth, newHeight)
-
+
def _getDiagramRect(self, border=0):
"""
Protected method to calculate the minimum rectangle fitting the
diagram.
-
+
@param border border width to include in the calculation (integer)
@return the minimum rectangle (QRectF)
"""
@@ -251,13 +274,13 @@
starty -= border
endx += border
endy += border
-
+
return QRectF(startx, starty, endx - startx + 1, endy - starty + 1)
-
+
def _getDiagramSize(self, border=0):
"""
Protected method to calculate the minimum size fitting the diagram.
-
+
@param border border width to include in the calculation (integer)
@return the minimum size (QSizeF)
"""
@@ -275,14 +298,14 @@
if border:
endx += border
endy += border
-
+
return QSizeF(endx + 1, endy + 1)
-
+
def __getDiagram(self, rect, imageFormat="PNG", filename=None):
"""
Private method to retrieve the diagram from the scene fitting it
in the minimum rectangle.
-
+
@param rect minimum rectangle fitting the diagram
@type QRectF
@param imageFormat format for the image file
@@ -293,18 +316,19 @@
@rtype QPixmap or QSvgGenerator
"""
selectedItems = self.scene().selectedItems()
-
+
# step 1: deselect all widgets
if selectedItems:
for item in selectedItems:
item.setSelected(False)
-
+
# step 2: grab the diagram
if imageFormat == "PNG":
paintDevice = QPixmap(int(rect.width()), int(rect.height()))
paintDevice.fill(self.backgroundBrush().color())
else:
from PyQt6.QtSvg import QSvgGenerator
+
paintDevice = QSvgGenerator()
paintDevice.setResolution(100) # 100 dpi
paintDevice.setSize(QSize(int(rect.width()), int(rect.height())))
@@ -313,18 +337,18 @@
painter = QPainter(paintDevice)
painter.setRenderHint(QPainter.RenderHint.Antialiasing, True)
self.scene().render(painter, QRectF(), rect)
-
+
# step 3: reselect the widgets
if selectedItems:
for item in selectedItems:
item.setSelected(True)
-
+
return paintDevice
-
+
def saveImage(self, filename, imageFormat="PNG"):
"""
Public method to save the scene to a file.
-
+
@param filename name of the file to write the image to (string)
@param imageFormat format for the image file (string)
@return flag indicating success (boolean)
@@ -336,73 +360,81 @@
else:
pixmap = self.__getDiagram(rect)
return pixmap.save(filename, imageFormat)
-
+
def printDiagram(self, printer, diagramName=""):
"""
Public method to print the diagram.
-
+
@param printer reference to a ready configured printer object
(QPrinter)
@param diagramName name of the diagram (string)
"""
painter = QPainter(printer)
-
+
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()
+ printer.pageLayout().paintRectPixels(printer.resolution()).x()
+ - printer.pageLayout().fullRectPixels(printer.resolution()).x()
)
marginX = (
- Preferences.getPrinter("LeftMargin") *
- int(printer.resolution() / 2.54) - marginX
+ Preferences.getPrinter("LeftMargin") * int(printer.resolution() / 2.54)
+ - marginX
)
marginY = (
- printer.pageLayout().paintRectPixels(printer.resolution()).y() -
- printer.pageLayout().fullRectPixels(printer.resolution()).y()
+ printer.pageLayout().paintRectPixels(printer.resolution()).y()
+ - printer.pageLayout().fullRectPixels(printer.resolution()).y()
)
marginY = (
- Preferences.getPrinter("TopMargin") *
- int(printer.resolution() / 2.54) - marginY
+ Preferences.getPrinter("TopMargin") * int(printer.resolution() / 2.54)
+ - marginY
)
-
+
width = (
- printer.width() - marginX -
- Preferences.getPrinter("RightMargin") *
- int(printer.resolution() / 2.54)
+ 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)
+ printer.height()
+ - fontHeight
+ - 4
+ - marginY
+ - Preferences.getPrinter("BottomMargin") * int(printer.resolution() / 2.54)
)
-
- self.scene().render(painter,
- target=QRectF(marginX, marginY, width, height))
-
+
+ self.scene().render(painter, target=QRectF(marginX, marginY, width, height))
+
# write a foot note
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.drawLine(
+ marginX, marginY + height + 2, marginX + width, marginY + height + 2
+ )
painter.setFont(font)
- painter.drawText(marginX, marginY + height + 4, width,
- fontHeight, Qt.AlignmentFlag.AlignRight, diagramName)
-
+ painter.drawText(
+ marginX,
+ marginY + height + 4,
+ width,
+ fontHeight,
+ Qt.AlignmentFlag.AlignRight,
+ diagramName,
+ )
+
painter.end()
-
+
###########################################################################
## The methods below should be overridden by subclasses to get special
## behavior.
###########################################################################
-
+
def filteredItems(self, items):
"""
Public method to filter a list of items.
-
+
@param items list of items as returned by the scene object
(QGraphicsItem)
@return list of interesting collision items (QGraphicsItem)
