本文整理汇总了Python中qwt.painter.QwtPainter.backingStore方法的典型用法代码示例。如果您正苦于以下问题：Python QwtPainter.backingStore方法的具体用法？Python QwtPainter.backingStore怎么用？Python QwtPainter.backingStore使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类qwt.painter.QwtPainter的用法示例。
在下文中一共展示了QwtPainter.backingStore方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: paintEvent
# 需要导入模块: from qwt.painter import QwtPainter [as 别名]
# 或者: from qwt.painter.QwtPainter import backingStore [as 别名]
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 bs.size() != self.size():
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.:
# 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.:
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)示例2: drawSymbols
# 需要导入模块: from qwt.painter import QwtPainter [as 别名]
# 或者: from qwt.painter.QwtPainter import backingStore [as 别名]
def drawSymbols(self, painter, points, numPoints=None):
"""
Render an array of symbols
Painting several symbols is more effective than drawing symbols
one by one, as a couple of layout calculations and setting of pen/brush
can be done once for the complete array.
:param QPainter painter: Painter
:param QPolygonF points: Positions of the symbols in screen coordinates
"""
#TODO: remove argument numPoints (not necessary in `PythonQwt`)
if numPoints is not None and numPoints <= 0:
return
useCache = False
if QwtPainter.roundingAlignment(painter) and\
not painter.transform().isScaling():
if self.__data.cache.policy == QwtSymbol.Cache:
useCache = True
elif self.__data.cache.policy == QwtSymbol.AutoCache:
if painter.paintEngine().type() == QPaintEngine.Raster:
useCache = True
else:
if self.__data.style in (QwtSymbol.XCross, QwtSymbol.HLine,
QwtSymbol.VLine, QwtSymbol.Cross):
pass
elif self.__data.style == QwtSymbol.Pixmap:
if not self.__data.size.isEmpty() and\
self.__data.size != self.__data.pixmap.pixmap.size():
useCache = True
else:
useCache = True
if useCache:
br = QRect(self.boundingRect())
rect = QRect(0, 0, br.width(), br.height())
if self.__data.cache.pixmap.isNull():
self.__data.cache.pixmap = QwtPainter.backingStore(None, br.size())
self.__data.cache.pixmap.fill(Qt.transparent)
p = QPainter(self.__data.cache.pixmap)
p.setRenderHints(painter.renderHints())
p.translate(-br.topLeft())
pos = QPointF()
self.renderSymbols(p, pos, 1)
dx = br.left()
dy = br.top()
for point in points:
left = round(point.x())+dx
top = round(point.y())+dy
painter.drawPixmap(left, top, self.__data.cache.pixmap)
else:
painter.save()
self.renderSymbols(painter, points, numPoints)
painter.restore()示例3: drawSymbols
# 需要导入模块: from qwt.painter import QwtPainter [as 别名]
# 或者: from qwt.painter.QwtPainter import backingStore [as 别名]
def drawSymbols(self, painter, points, numPoints=None):
#TODO: remove argument numPoints (not necessary in Python's qwt)
if numPoints is not None and numPoints <= 0:
return
useCache = False
if QwtPainter.roundingAlignment(painter) and\
not painter.transform().isScaling():
if self.__data.cache.policy == QwtSymbol.Cache:
useCache = True
elif self.__data.cache.policy == QwtSymbol.AutoCache:
if painter.paintEngine().type() == QPaintEngine.Raster:
useCache = True
else:
if self.__data.style in (QwtSymbol.XCross, QwtSymbol.HLine,
QwtSymbol.VLine, QwtSymbol.Cross):
pass
elif self.__data.style == QwtSymbol.Pixmap:
if not self.__data.size.isEmpty() and\
self.__data.size != self.__data.pixmap.pixmap.size():
useCache = True
else:
useCache = True
if useCache:
br = QRect(self.boundingRect())
rect = QRect(0, 0, br.width(), br.height())
if self.__data.cache.pixmap.isNull():
self.__data.cache.pixmap = QwtPainter.backingStore(None, br.size())
self.__data.cache.pixmap.fill(Qt.transparent)
p = QPainter(self.__data.cache.pixmap)
p.setRenderHints(painter.renderHints())
p.translate(-br.topLeft())
pos = QPointF()
self.renderSymbols(p, pos, 1)
dx = br.left()
dy = br.top()
for point in points:
left = round(point.x())+dx
top = round(point.y())+dy
painter.drawPixmap(left, top, self.__data.cache.pixmap)
else:
painter.save()
self.renderSymbols(painter, points, numPoints)
painter.restore()