def paintEvent(self, event):
painter = QPainter(self)
painter.setClipRegion(event.region())
if (
self.testPaintAttribute(self.BackingStore)
and self.__data.backingStore is not None
):
bs = self.__data.backingStore
if QT_MAJOR_VERSION >= 5:
pixelRatio = bs.devicePixelRatio()
else:
pixelRatio = 1.0
if bs.size() != self.size() * pixelRatio:
bs = QwtPainter.backingStore(self, self.size())
if self.testAttribute(Qt.WA_StyledBackground):
p = QPainter(bs)
qwtFillBackground(p, self)
self.drawCanvas(p, True)
else:
p = QPainter()
if self.__data.borderRadius <= 0.0:
# print('**DEBUG: QwtPlotCanvas.paintEvent')
QwtPainter.fillPixmap(self, bs)
p.begin(bs)
self.drawCanvas(p, False)
else:
p.begin(bs)
qwtFillBackground(p, self)
self.drawCanvas(p, True)
if self.frameWidth() > 0:
self.drawBorder(p)
p.end()
painter.drawPixmap(0, 0, self.__data.backingStore)
else:
if self.testAttribute(Qt.WA_StyledBackground):
if self.testAttribute(Qt.WA_OpaquePaintEvent):
qwtFillBackground(painter, self)
self.drawCanvas(painter, True)
else:
self.drawCanvas(painter, False)
else:
if self.testAttribute(Qt.WA_OpaquePaintEvent):
if self.autoFillBackground():
qwtFillBackground(painter, self)
qwtDrawBackground(painter, self)
else:
if self.borderRadius() > 0.0:
clipPath = QPainterPath()
clipPath.addRect(self.rect())
clipPath = clipPath.subtracted(self.borderPath(self.rect()))
painter.save()
painter.setClipPath(clipPath, Qt.IntersectClip)
qwtFillBackground(painter, self)
qwtDrawBackground(painter, self)
painter.restore()
self.drawCanvas(painter, False)
if self.frameWidth() > 0:
self.drawBorder(painter)
if self.hasFocus() and self.focusIndicator() == self.CanvasFocusIndicator:
self.drawFocusIndicator(painter)
def drawPrimitive(self, pe, opt, p: QtGui.QPainter, widget):
# QToolButton elements:
# 13: PE_PanelButtonCommand (Fusion) - Fusion button background, called from 15 and 24 calls
# 15: PE_PanelButtonTool (Windows, Fusion) - left part background (XP/Vista styles do not draw it with `drawPrimitive`)
# 19: PE_IndicatorArrowDown (Windows, Fusion) - right part down arrow (XP/Vista styles draw it in 24 call)
# 24: PE_IndicatorButtonDropDown (Windows, XP, Vista, Fusion) - right part background (+arrow for XP/Vista)
#
# Arrow is drawn along with PE_IndicatorButtonDropDown (XP/Vista)
# https://github.com/qt/qtbase/blob/0c51a8756377c40180619046d07b35718fcf1784/src/plugins/styles/windowsvista/qwindowsxpstyle.cpp#L1406
# https://github.com/qt/qtbase/blob/0c51a8756377c40180619046d07b35718fcf1784/src/plugins/styles/windowsvista/qwindowsxpstyle.cpp#L666
# drawBackground paints with DrawThemeBackgroundEx WinApi function
# https://docs.microsoft.com/en-us/windows/win32/api/uxtheme/nf-uxtheme-drawthemebackgroundex
if (self.stylename in self.win_modern
and pe == self.PE_IndicatorButtonDropDown):
pe = self.PE_IndicatorArrowDown # see below
if pe == self.PE_IndicatorArrowDown:
opt_ = QtWidgets.QStyleOptionToolButton()
widget.initStyleOption(opt_)
rc = super().subControlRect(self.CC_ToolButton, opt_,
self.SC_ToolButtonMenu, widget)
if self.stylename in self.win_modern:
# By default PE_IndicatorButtonDropDown draws arrow along
# with right button art. Draw 2px clipped left part instead
path = QtGui.QPainterPath()
path.addRect(QtCore.QRectF(rc))
p.setClipPath(path)
super().drawPrimitive(self.PE_PanelButtonTool, opt, p, widget)
# centered square
rc.moveTop(int((rc.height() - rc.width()) / 2))
rc.setHeight(rc.width())
# p.setRenderHint(p.Antialiasing)
p.drawPixmap(rc, self.arrow_pix, QtCore.QRect())
else:
super().drawPrimitive(pe, opt, p, widget)
