def paintEvent(self, event):
painter = QPainter(self)
painter.setClipRegion(event.region())
opt = QStyleOption()
opt.initFrom(self)
self.style().drawPrimitive(QStyle.PE_Widget, opt, painter, self)
self.draw(painter)
def fillPixmap(self, widget, pixmap, offset=None):
"""
Fill a pixmap with the content of a widget
In Qt >= 5.0 `QPixmap.fill()` is a nop, in Qt 4.x it is buggy
for backgrounds with gradients. Thus `fillPixmap()` offers
an alternative implementation.
:param QWidget widget: Widget
:param QPixmap pixmap: Pixmap to be filled
:param QPoint offset: Offset
.. seealso::
:py:meth:`QPixmap.fill()`
"""
if offset is None:
offset = QPoint()
rect = QRect(offset, pixmap.size())
painter = QPainter(pixmap)
painter.translate(-offset)
autoFillBrush = widget.palette().brush(widget.backgroundRole())
if not (widget.autoFillBackground() and autoFillBrush.isOpaque()):
bg = widget.palette().brush(QPalette.Window)
qwtFillRect(widget, painter, rect, bg)
if widget.autoFillBackground():
qwtFillRect(widget, painter, rect, autoFillBrush)
if widget.testAttribute(Qt.WA_StyledBackground):
painter.setClipRegion(rect)
opt = QStyleOption()
opt.initFrom(widget)
widget.style().drawPrimitive(QStyle.PE_Widget, opt,
painter, widget)
def borderPath(self, rect):
"""
Calculate the painter path for a styled or rounded border
When the canvas has no styled background or rounded borders
the painter path is empty.
:param QRect rect: Bounding rectangle of the canvas
:return: Painter path, that can be used for clipping
"""
if self.testAttribute(Qt.WA_StyledBackground):
recorder = QwtStyleSheetRecorder(rect.size())
painter = QPainter(recorder)
opt = QStyleOption()
opt.initFrom(self)
opt.rect = rect
self.style().drawPrimitive(QStyle.PE_Widget, opt, painter, self)
painter.end()
if not recorder.background.path.isEmpty():
return recorder.background.path
if not recorder.border.rectList.isEmpty():
return qwtCombinePathList(rect, recorder.border.pathlist)
elif self.__data.borderRadius > 0.:
fw2 = self.frameWidth() * .5
r = QRectF(rect).adjusted(fw2, fw2, -fw2, -fw2)
path = QPainterPath()
path.addRoundedRect(r, self.__data.borderRadius,
self.__data.borderRadius)
return path
return QPainterPath()
def legendIcon(self, index, size):
"""
:param int index: Index of the legend entry (ignored as there is only one)
:param QSizeF size: Icon size
:return: Icon representing the marker on the legend
.. seealso::
:py:meth:`qwt.plot.QwtPlotItem.setLegendIconSize()`,
:py:meth:`qwt.plot.QwtPlotItem.legendData()`
"""
if size.isEmpty():
return QwtGraphic()
icon = QwtGraphic()
icon.setDefaultSize(size)
icon.setRenderHint(QwtGraphic.RenderPensUnscaled, True)
painter = QPainter(icon)
painter.setRenderHint(
QPainter.Antialiasing,
self.testRenderHint(QwtPlotItem.RenderAntialiased))
if self.__data.style != QwtPlotMarker.NoLine:
painter.setPen(self.__data.pen)
if self.__data.style in (QwtPlotMarker.HLine, QwtPlotMarker.Cross):
y = .5 * size.height()
painter.drawLine(0., y, size.width(), y)
if self.__data.style in (QwtPlotMarker.VLine, QwtPlotMarker.Cross):
x = .5 * size.width()
painter.drawLine(x, 0., x, size.height())
if self.__data.symbol:
r = QRect(0, 0, size.width(), size.height())
self.__data.symbol.drawSymbol(painter, r)
return icon
def paintEvent(self, event):
painter = QPainter(self)
painter.setClipRegion(event.region())
opt = QStyleOption()
opt.initFrom(self)
self.style().drawPrimitive(QStyle.PE_Widget, opt, painter, self)
self.draw(painter)
def borderPath(self, rect):
"""
Calculate the painter path for a styled or rounded border
When the canvas has no styled background or rounded borders
the painter path is empty.
:param QRect rect: Bounding rectangle of the canvas
:return: Painter path, that can be used for clipping
"""
if self.testAttribute(Qt.WA_StyledBackground):
recorder = QwtStyleSheetRecorder(rect.size())
painter = QPainter(recorder)
opt = QStyleOption()
opt.initFrom(self)
opt.rect = rect
self.style().drawPrimitive(QStyle.PE_Widget, opt, painter, self)
painter.end()
if not recorder.background.path.isEmpty():
return recorder.background.path
if not recorder.border.rectList.isEmpty():
return qwtCombinePathList(rect, recorder.border.pathlist)
elif self.__data.borderRadius > 0.:
fw2 = self.frameWidth()*.5
r = QRectF(rect).adjusted(fw2, fw2, -fw2, -fw2)
path = QPainterPath()
path.addRoundedRect(r, self.__data.borderRadius,
self.__data.borderRadius)
return path
return QPainterPath()
def legendIcon(self, index, size):
"""
:param int index: Index of the legend entry (ignored as there is only one)
:param QSizeF size: Icon size
:return: Icon representing the marker on the legend
.. seealso::
:py:meth:`qwt.plot.QwtPlotItem.setLegendIconSize()`,
:py:meth:`qwt.plot.QwtPlotItem.legendData()`
"""
if size.isEmpty():
return QwtGraphic()
icon = QwtGraphic()
icon.setDefaultSize(size)
icon.setRenderHint(QwtGraphic.RenderPensUnscaled, True)
painter = QPainter(icon)
painter.setRenderHint(QPainter.Antialiasing,
self.testRenderHint(QwtPlotItem.RenderAntialiased))
if self.__data.style != QwtPlotMarker.NoLine:
painter.setPen(self.__data.pen)
if self.__data.style in (QwtPlotMarker.HLine, QwtPlotMarker.Cross):
y = .5*size.height()
QwtPainter.drawLine(painter, 0., y, size.width(), y)
if self.__data.style in (QwtPlotMarker.VLine, QwtPlotMarker.Cross):
x = .5*size.width()
QwtPainter.drawLine(painter, x, 0., x, size.height())
if self.__data.symbol:
r = QRect(0, 0, size.width(), size.height())
self.__data.symbol.drawSymbol(painter, r)
return icon
def defaultIcon(brush, size):
icon = QwtGraphic()
if not size.isEmpty():
icon.setDefaultSize(size)
r = QRectF(0, 0, size.width(), size.height())
painter = QPainter(icon)
painter.fillRect(r, brush)
return icon
def toImage(self, *args):
"""
.. py:method:: toImage()
Convert the graphic to a `QImage`
All pixels of the image get initialized by 0 ( transparent )
before the graphic is scaled and rendered on it.
The format of the image is `QImage.Format_ARGB32_Premultiplied`.
The size of the image is the default size ( ceiled to integers )
of the graphic.
:return: The graphic as image in default size
.. py:method:: toImage(size, [aspectRatioMode=Qt.IgnoreAspectRatio])
Convert the graphic to a `QImage`
All pixels of the image get initialized by 0 ( transparent )
before the graphic is scaled and rendered on it.
The format of the image is `QImage.Format_ARGB32_Premultiplied`.
:param QSize size: Size of the image
:param `Qt.AspectRatioMode` aspectRatioMode: Aspect ratio how to scale the graphic
:return: The graphic as image
.. seealso::
:py:meth:`toPixmap()`, :py:meth:`render()`
"""
if len(args) == 0:
if self.isNull():
return QImage()
sz = self.defaultSize()
w = np.ceil(sz.width())
h = np.ceil(sz.height())
image = QImage(w, h, QImage.Format_ARGB32)
image.fill(0)
r = QRect(0, 0, sz.width(), sz.height())
painter = QPainter(image)
self.render(painter, r, Qt.KeepAspectRatio)
painter.end()
return image
elif len(args) in (1, 2):
size = args[0]
aspectRatioMode = Qt.IgnoreAspectRatio
if len(args) == 2:
aspectRatioMode = args[-1]
image = QImage(size, QImage.Format_ARGB32_Premultiplied)
image.fill(0)
r = QRect(0, 0, size.width(), size.height())
painter = QPainter(image)
self.render(painter, r, aspectRatioMode)
return image
def paintEvent(self, event):
painter = QPainter(self)
if not self.contentsRect().contains(event.rect()):
painter.save()
painter.setClipRegion(event.region() & self.frameRect())
self.drawFrame(painter)
painter.restore()
painter.setClipRegion(event.region() & self.contentsRect())
self.drawContents(painter)
def qwtPathGraphic(path, pen, brush):
graphic = QwtGraphic()
graphic.setRenderHint(QwtGraphic.RenderPensUnscaled)
painter = QPainter(graphic)
painter.setPen(pen)
painter.setBrush(brush)
painter.drawPath(path)
painter.end()
return graphic
def drawSeries(self, seriesItem, from_, to):
"""When observing an measurement while it is running, new points have
to be added to an existing seriesItem. drawSeries() can be used to
display them avoiding a complete redraw of the canvas.
Setting plot().canvas().setAttribute(Qt.WA_PaintOutsidePaintEvent, True)
will result in faster painting, if the paint engine of the canvas widget
supports this feature."""
if seriesItem is None or seriesItem.plot() is None:
return
canvas = seriesItem.plot().canvas()
canvasRect = canvas.contentsRect()
plotCanvas = canvas #XXX: cast to QwtPlotCanvas
if plotCanvas and qwtHasBackingStore(plotCanvas):
painter = QPainter(plotCanvas.backingStore()) #XXX: cast plotCanvas.backingStore() to QPixmap
if self.__data.hasClipping:
painter.setClipRegion(self.__data.clipRegion)
qwtRenderItem(painter, canvasRect, seriesItem, from_, to)
if self.testAttribute(self.FullRepaint):
plotCanvas.repaint()
return
immediatePaint = True
if not canvas.testAttribute(Qt.WA_WState_InPaintEvent):
if QT_VERSION >= 0x050000 or\
not canvas.testAttribute(Qt.WA_PaintOutsidePaintEvent):
immediatePaint = False
if immediatePaint:
if not self.__data.painter.isActive():
self.reset()
self.__data.painter.begin(canvas)
canvas.installEventFilter(self)
if self.__data.hasClipping:
self.__data.painter.setClipRegion(
QRegion(canvasRect) & self.__data.clipRegion)
elif not self.__data.painter.hasClipping():
self.__data.painter.setClipRect(canvasRect)
qwtRenderItem(self.__data.painter,
canvasRect, seriesItem, from_, to)
if self.__data.attributes & self.AtomicPainter:
self.reset()
elif self.__data.hasClipping:
self.__data.painter.setClipping(False)
else:
self.reset()
self.__data.seriesItem = seriesItem
self.__data.from_ = from_
self.__data.to = to
clipRegion = QRegion(canvasRect)
if self.__data.hasClipping:
clipRegion &= self.__data.clipRegion
canvas.installEventFilter(self)
canvas.repaint(clipRegion)
canvas.removeEventFilter(self)
self.__data.seriesItem = None
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()
def paintEvent(self, event):
painter = QPainter(self)
if not self.contentsRect().contains(event.rect()):
painter.save()
painter.setClipRegion(event.region() & self.frameRect())
self.drawFrame(painter)
painter.restore()
painter.setClipRegion(event.region() & self.contentsRect())
self.drawContents(painter)
def qwtPathGraphic(path, pen, brush):
graphic = QwtGraphic()
graphic.setRenderHint(QwtGraphic.RenderPensUnscaled)
painter = QPainter(graphic)
painter.setPen(pen)
painter.setBrush(brush)
painter.drawPath(path)
painter.end()
return graphic
def toPixmap(self, *args):
if len(args) == 0:
if self.isNull():
return QPixmap()
sz = self.defaultSize()
w = np.ceil(sz.width())
h = np.ceil(sz.height())
pixmap = QPixmap(w, h)
pixmap.fill(Qt.transparent)
r = QRectF(0., 0., sz.width(), sz.height())
painter = QPainter(pixmap)
self.render(painter, r, Qt.KeepAspectRatio)
painter.end()
return pixmap
elif len(args) in (1, 2):
size = args[0]
aspectRatioMode = Qt.IgnoreAspectRatio
if len(args) == 2:
aspectRatioMode = args[-1]
pixmap = QPixmap(size)
pixmap.fill(Qt.transparent)
r = QRect(0, 0, size.width(), size.height())
painter = QPainter(pixmap)
self.render(painter, r, aspectRatioMode)
painter.end()
return pixmap
def renderDocument(self, plot, filename, sizeMM=(300, 200), resolution=85,
format_=None):
if isinstance(sizeMM, tuple):
sizeMM = QSizeF(*sizeMM)
if format_ is None:
ext = osp.splitext(filename)[1]
if not ext:
raise TypeError("Unable to determine target format from filename")
format_ = ext[1:]
if plot is None or sizeMM.isEmpty() or resolution <= 0:
return
title = plot.title().text()
if not title:
title = "Plot Document"
mmToInch = 1./25.4
size = sizeMM * mmToInch * resolution
documentRect = QRectF(0.0, 0.0, size.width(), size.height())
fmt = format_.lower()
if fmt in ("pdf", "ps"):
printer = QPrinter()
if fmt == "pdf":
printer.setOutputFormat(QPrinter.PdfFormat)
else:
printer.setOutputFormat(QPrinter.PostScriptFormat)
printer.setColorMode(QPrinter.Color)
printer.setFullPage(True)
printer.setPaperSize(sizeMM, QPrinter.Millimeter)
printer.setDocName(title)
printer.setOutputFileName(filename)
printer.setResolution(resolution)
painter = QPainter(printer)
self.render(plot, painter, documentRect)
painter.end()
elif fmt == "svg":
generator = QSvgGenerator()
generator.setTitle(title)
generator.setFileName(filename)
generator.setResolution(resolution)
generator.setViewBox(documentRect)
painter = QPainter(generator)
self.render(plot, painter, documentRect)
painter.end()
elif fmt in QImageWriter.supportedImageFormats():
imageRect = documentRect.toRect()
dotsPerMeter = int(round(resolution*mmToInch*1000.))
image = QImage(imageRect.size(), QImage.Format_ARGB32)
image.setDotsPerMeterX(dotsPerMeter)
image.setDotsPerMeterY(dotsPerMeter)
image.fill(QColor(Qt.white).rgb())
painter = QPainter(image)
self.render(plot, painter, imageRect)
painter.end()
image.save(filename, fmt)
else:
raise TypeError("Unsupported file format '%s'" % fmt)
def legendIcon(self, index, size):
if size.isEmpty():
return QwtGraphic()
graphic = QwtGraphic()
graphic.setDefaultSize(size)
graphic.setRenderHint(QwtGraphic.RenderPensUnscaled, True)
painter = QPainter(graphic)
painter.setRenderHint(
QPainter.Antialiasing,
self.testRenderHint(QwtPlotItem.RenderAntialiased))
if self.__data.legendAttributes == 0 or\
(self.__data.legendAttributes & QwtPlotCurve.LegendShowBrush):
brush = self.__data.brush
if brush.style(
) == Qt.NoBrush and self.__data.legendAttributes == 0:
if self.style() != QwtPlotCurve.NoCurve:
brush = QBrush(self.pen().color())
elif self.__data.symbol and\
self.__data.symbol.style() != QwtSymbol.NoSymbol:
brush = QBrush(self.__data.symbol.pen().color())
if brush.style() != Qt.NoBrush:
r = QRectF(0, 0, size.width(), size.height())
painter.fillRect(r, brush)
if self.__data.legendAttributes & QwtPlotCurve.LegendShowLine:
if self.pen() != Qt.NoPen:
pn = self.pen()
# pn.setCapStyle(Qt.FlatCap)
painter.setPen(pn)
y = .5 * size.height()
QwtPainter.drawLine(painter, 0., y, size.width(), y)
if self.__data.legendAttributes & QwtPlotCurve.LegendShowSymbol:
if self.__data.symbol:
r = QRectF(0, 0, size.width(), size.height())
self.__data.symbol.drawSymbol(painter, r)
return graphic
def qwtFillBackground(*args):
if len(args) == 2:
painter, canvas = args
rects = []
if canvas.testAttribute(Qt.WA_StyledBackground):
recorder = QwtStyleSheetRecorder(canvas.size())
p = QPainter(recorder)
qwtDrawStyledBackground(canvas, p)
p.end()
if recorder.background.brush.isOpaque():
rects = recorder.clipRects
else:
rects += [canvas.rect()]
else:
r = canvas.rect()
radius = canvas.borderRadius()
if radius > 0.:
sz = QSizeF(radius, radius)
rects += [
QRectF(r.topLeft(), sz),
QRectF(r.topRight() - QPointF(radius, 0), sz),
QRectF(r.bottomRight() - QPointF(radius, radius), sz),
QRectF(r.bottomLeft() - QPointF(0, radius), sz)
]
qwtFillBackground(painter, canvas, rects)
elif len(args) == 3:
painter, widget, fillRects = args
if not fillRects:
return
if painter.hasClipping():
clipRegion = painter.transform().map(painter.clipRegion())
else:
clipRegion = widget.contentsRect()
bgWidget = qwtBackgroundWidget(widget.parentWidget())
for fillRect in fillRects:
rect = fillRect.toAlignedRect()
if clipRegion.intersects(rect):
pm = QPixmap(rect.size())
QwtPainter.fillPixmap(bgWidget, pm,
widget.mapTo(bgWidget, rect.topLeft()))
painter.drawPixmap(rect, pm)
else:
raise TypeError("%s() takes 2 or 3 argument(s) (%s given)"\
% ("qwtFillBackground", len(args)))
def qwtBackgroundWidget(w):
if w.parentWidget() is None:
return w
if w.autoFillBackground():
brush = w.palette().brush(w.backgroundRole())
if brush.color().alpha() > 0:
return w
if w.testAttribute(Qt.WA_StyledBackground):
image = QImage(1, 1, QImage.Format_ARGB32)
image.fill(Qt.transparent)
painter = QPainter(image)
painter.translate(-w.rect().center())
qwtDrawStyledBackground(w, painter)
painter.end()
if qAlpha(image.pixel(0, 0)) != 0:
return w
return qwtBackgroundWidget(w.parentWidget())
def qwtFillBackground(*args):
if len(args) == 2:
painter, canvas = args
rects = []
if canvas.testAttribute(Qt.WA_StyledBackground):
recorder = QwtStyleSheetRecorder(canvas.size())
p = QPainter(recorder)
qwtDrawStyledBackground(canvas, p)
p.end()
if recorder.background.brush.isOpaque():
rects = recorder.clipRects
else:
rects += [canvas.rect()]
else:
r = canvas.rect()
radius = canvas.borderRadius()
if radius > 0.:
sz = QSizeF(radius, radius)
rects += [QRectF(r.topLeft(), sz),
QRectF(r.topRight()-QPointF(radius, 0), sz),
QRectF(r.bottomRight()-QPointF(radius, radius), sz),
QRectF(r.bottomLeft()-QPointF(0, radius), sz)]
qwtFillBackground(painter, canvas, rects)
elif len(args) == 3:
painter, widget, fillRects = args
if not fillRects:
return
if painter.hasClipping():
clipRegion = painter.transform().map(painter.clipRegion())
else:
clipRegion = widget.contentsRect()
bgWidget = qwtBackgroundWidget(widget.parentWidget())
for fillRect in fillRects:
rect = fillRect.toAlignedRect()
if clipRegion.intersects(rect):
pm = QPixmap(rect.size())
QwtPainter.fillPixmap(bgWidget, pm, widget.mapTo(bgWidget, rect.topLeft()))
painter.drawPixmap(rect, pm)
else:
raise TypeError("%s() takes 2 or 3 argument(s) (%s given)"\
% ("qwtFillBackground", len(args)))
def __init__(self):
self.attributes = 0
self.hasClipping = False
self.seriesItem = None # QwtPlotSeriesItem
self.clipRegion = QRegion()
self.painter = QPainter()
self.from_ = None
self.to = None
def legendIcon(self, index, size):
"""
:param int index: Index of the legend entry (ignored as there is only one)
:param QSizeF size: Icon size
:return: Icon representing the curve on the legend
.. seealso::
:py:meth:`qwt.plot.QwtPlotItem.setLegendIconSize()`,
:py:meth:`qwt.plot.QwtPlotItem.legendData()`
"""
if size.isEmpty():
return QwtGraphic()
graphic = QwtGraphic()
graphic.setDefaultSize(size)
graphic.setRenderHint(QwtGraphic.RenderPensUnscaled, True)
painter = QPainter(graphic)
painter.setRenderHint(
QPainter.Antialiasing,
self.testRenderHint(QwtPlotItem.RenderAntialiased))
if self.__data.legendAttributes == 0 or\
(self.__data.legendAttributes & QwtPlotCurve.LegendShowBrush):
brush = self.__data.brush
if brush.style(
) == Qt.NoBrush and self.__data.legendAttributes == 0:
if self.style() != QwtPlotCurve.NoCurve:
brush = QBrush(self.pen().color())
elif self.__data.symbol and\
self.__data.symbol.style() != QwtSymbol.NoSymbol:
brush = QBrush(self.__data.symbol.pen().color())
if brush.style() != Qt.NoBrush:
r = QRectF(0, 0, size.width(), size.height())
painter.fillRect(r, brush)
if self.__data.legendAttributes & QwtPlotCurve.LegendShowLine:
if self.pen() != Qt.NoPen:
pn = self.pen()
# pn.setCapStyle(Qt.FlatCap)
painter.setPen(pn)
y = .5 * size.height()
painter.drawLine(0., y, size.width(), y)
if self.__data.legendAttributes & QwtPlotCurve.LegendShowSymbol:
if self.__data.symbol:
r = QRectF(0, 0, size.width(), size.height())
self.__data.symbol.drawSymbol(painter, r)
return graphic
def legendIcon(self, index, size):
if size.isEmpty():
return QwtGraphic()
graphic = QwtGraphic()
graphic.setDefaultSize(size)
graphic.setRenderHint(QwtGraphic.RenderPensUnscaled, True)
painter = QPainter(graphic)
painter.setRenderHint(QPainter.Antialiasing,
self.testRenderHint(QwtPlotItem.RenderAntialiased))
if self.__data.legendAttributes == 0 or\
(self.__data.legendAttributes & QwtPlotCurve.LegendShowBrush):
brush = self.__data.brush
if brush.style() == Qt.NoBrush and self.__data.legendAttributes == 0:
if self.style() != QwtPlotCurve.NoCurve:
brush = QBrush(self.pen().color())
elif self.__data.symbol and\
self.__data.symbol.style() != QwtSymbol.NoSymbol:
brush = QBrush(self.__data.symbol.pen().color())
if brush.style() != Qt.NoBrush:
r = QRectF(0, 0, size.width(), size.height())
painter.fillRect(r, brush)
if self.__data.legendAttributes & QwtPlotCurve.LegendShowLine:
if self.pen() != Qt.NoPen:
pn = self.pen()
# pn.setCapStyle(Qt.FlatCap)
painter.setPen(pn)
y = .5*size.height()
QwtPainter.drawLine(painter, 0., y, size.width(), y)
if self.__data.legendAttributes & QwtPlotCurve.LegendShowSymbol:
if self.__data.symbol:
r = QRectF(0, 0, size.width(), size.height())
self.__data.symbol.drawSymbol(painter, r)
return graphic
def fillPixmap(self, widget, pixmap, offset=None):
if offset is None:
offset = QPoint()
rect = QRect(offset, pixmap.size())
painter = QPainter(pixmap)
painter.translate(-offset)
autoFillBrush = widget.palette().brush(widget.backgroundRole())
if not (widget.autoFillBackground() and autoFillBrush.isOpaque()):
bg = widget.palette().brush(QPalette.Window)
qwtFillRect(widget, painter, rect, bg)
if widget.autoFillBackground():
qwtFillRect(widget, painter, rect, autoFillBrush)
if widget.testAttribute(Qt.WA_StyledBackground):
painter.setClipRegion(rect)
opt = QStyleOption()
opt.initFrom(widget)
widget.style().drawPrimitive(QStyle.PE_Widget, opt,
painter, widget)
def updateStyleSheetInfo(self):
if not self.testAttribute(Qt.WA_StyledBackground):
return
recorder = QwtStyleSheetRecorder(self.size())
painter = QPainter(recorder)
opt = QStyleOption()
opt.initFrom(self)
self.style().drawPrimitive(QStyle.PE_Widget, opt, painter, self)
painter.end()
self.__data.styleSheet.hasBorder = not recorder.border.rectList.isEmpty()
self.__data.styleSheet.cornerRects = recorder.clipRects
if recorder.background.path.isEmpty():
if not recorder.border.rectList.isEmpty():
self.__data.styleSheet.borderPath =\
qwtCombinePathList(self.rect(), recorder.border.pathlist)
else:
self.__data.styleSheet.borderPath = recorder.background.path
self.__data.styleSheet.background.brush = recorder.background.brush
self.__data.styleSheet.background.origin = recorder.background.origin
def qwtDrawBackground(painter, canvas):
painter.save()
borderClip = canvas.borderPath(canvas.rect())
if not borderClip.isEmpty():
painter.setClipPath(borderClip, Qt.IntersectClip)
brush = canvas.palette().brush(canvas.backgroundRole())
if brush.style() == Qt.TexturePattern:
pm = QPixmap(canvas.size())
QwtPainter.fillPixmap(canvas, pm)
painter.drawPixmap(0, 0, pm)
elif brush.gradient():
rects = []
if brush.gradient().coordinateMode() == QGradient.ObjectBoundingMode:
rects += [canvas.rect()]
else:
rects += [painter.clipRegion().rects()]
useRaster = False
if painter.paintEngine().type() == QPaintEngine.X11:
useRaster = True
if useRaster:
format_ = QImage.Format_RGB32
stops = brush.gradient().stops()
for stop in stops:
if stop.second.alpha() != 255:
format_ = QImage.Format_ARGB32
break
image = QImage(canvas.size(), format_)
p = QPainter(image)
p.setPen(Qt.NoPen)
p.setBrush(brush)
p.drawRects(_rects_conv_PyQt5(rects))
p.end()
painter.drawImage(0, 0, image)
else:
painter.setPen(Qt.NoPen)
painter.setBrush(brush)
painter.drawRects(_rects_conv_PyQt5(rects))
else:
painter.setPen(Qt.NoPen)
painter.setBrush(brush)
painter.drawRects(_rects_conv_PyQt5(painter.clipRegion().rects()))
painter.restore()
def updateStyleSheetInfo(self):
if not self.testAttribute(Qt.WA_StyledBackground):
return
recorder = QwtStyleSheetRecorder(self.size())
painter = QPainter(recorder)
opt = QStyleOption()
opt.initFrom(self)
self.style().drawPrimitive(QStyle.PE_Widget, opt, painter, self)
painter.end()
self.__data.styleSheet.hasBorder = not recorder.border.rectList.isEmpty(
)
self.__data.styleSheet.cornerRects = recorder.clipRects
if recorder.background.path.isEmpty():
if not recorder.border.rectList.isEmpty():
self.__data.styleSheet.borderPath =\
qwtCombinePathList(self.rect(), recorder.border.pathlist)
else:
self.__data.styleSheet.borderPath = recorder.background.path
self.__data.styleSheet.background.brush = recorder.background.brush
self.__data.styleSheet.background.origin = recorder.background.origin
def legendIcon(self, index, size):
if size.isEmpty():
return QwtGraphic()
icon = QwtGraphic()
icon.setDefaultSize(size)
icon.setRenderHint(QwtGraphic.RenderPensUnscaled, True)
painter = QPainter(icon)
painter.setRenderHint(QPainter.Antialiasing,
self.testRenderHint(QwtPlotItem.RenderAntialiased))
if self.__data.style != QwtPlotMarker.NoLine:
painter.setPen(self.__data.pen)
if self.__data.style in (QwtPlotMarker.HLine, QwtPlotMarker.Cross):
y = .5*size.height()
QwtPainter.drawLine(painter, 0., y, size.width(), y)
if self.__data.style in (QwtPlotMarker.VLine, QwtPlotMarker.Cross):
x = .5*size.width()
QwtPainter.drawLine(painter, x, 0., x, size.height())
if self.__data.symbol:
r = QRect(0, 0, size.width(), size.height())
self.__data.symbol.drawSymbol(painter, r)
return icon
def borderPath(self, rect):
if self.testAttribute(Qt.WA_StyledBackground):
recorder = QwtStyleSheetRecorder(rect.size())
painter = QPainter(recorder)
opt = QStyleOption()
opt.initFrom(self)
opt.rect = rect
self.style().drawPrimitive(QStyle.PE_Widget, opt, painter, self)
painter.end()
if not recorder.background.path.isEmpty():
return recorder.background.path
if not recorder.border.rectList.isEmpty():
return qwtCombinePathList(rect, recorder.border.pathlist)
elif self.__data.borderRadius > 0.:
fw2 = self.frameWidth()*.5
r = QRectF(rect).adjusted(fw2, fw2, -fw2, -fw2)
path = QPainterPath()
path.addRoundedRect(r, self.__data.borderRadius,
self.__data.borderRadius)
return path
return QPainterPath()
def borderPath(self, rect):
if self.testAttribute(Qt.WA_StyledBackground):
recorder = QwtStyleSheetRecorder(rect.size())
painter = QPainter(recorder)
opt = QStyleOption()
opt.initFrom(self)
opt.rect = rect
self.style().drawPrimitive(QStyle.PE_Widget, opt, painter, self)
painter.end()
if not recorder.background.path.isEmpty():
return recorder.background.path
if not recorder.border.rectList.isEmpty():
return qwtCombinePathList(rect, recorder.border.pathlist)
elif self.__data.borderRadius > 0.:
fw2 = self.frameWidth() * .5
r = QRectF(rect).adjusted(fw2, fw2, -fw2, -fw2)
path = QPainterPath()
path.addRoundedRect(r, self.__data.borderRadius,
self.__data.borderRadius)
return path
return QPainterPath()
def toImage(self, *args):
if len(args) == 0:
if self.isNull():
return QImage()
sz = self.defaultSize()
w = np.ceil(sz.width())
h = np.ceil(sz.height())
image = QImage(w, h, QImage.Format_ARGB32)
image.fill(0)
r = QRect(0, 0, sz.width(), sz.height())
painter = QPainter(image)
self.render(painter, r, Qt.KeepAspectRatio)
painter.end()
return image
elif len(args) in (1, 2):
size = args[0]
aspectRatioMode = Qt.IgnoreAspectRatio
if len(args) == 2:
aspectRatioMode = args[-1]
image = QImage(size, QImage.Format_ARGB32_Premultiplied)
image.fill(0)
r = QRect(0, 0, size.width(), size.height())
painter = QPainter(image)
self.render(painter, r, aspectRatioMode)
return image
def fillPixmap(self, widget, pixmap, offset=None):
"""
Fill a pixmap with the content of a widget
In Qt >= 5.0 `QPixmap.fill()` is a nop, in Qt 4.x it is buggy
for backgrounds with gradients. Thus `fillPixmap()` offers
an alternative implementation.
:param QWidget widget: Widget
:param QPixmap pixmap: Pixmap to be filled
:param QPoint offset: Offset
.. seealso::
:py:meth:`QPixmap.fill()`
"""
if offset is None:
offset = QPoint()
rect = QRect(offset, pixmap.size())
painter = QPainter(pixmap)
painter.translate(-offset)
autoFillBrush = widget.palette().brush(widget.backgroundRole())
if not (widget.autoFillBackground() and autoFillBrush.isOpaque()):
bg = widget.palette().brush(QPalette.Window)
qwtFillRect(widget, painter, rect, bg)
if widget.autoFillBackground():
qwtFillRect(widget, painter, rect, autoFillBrush)
if widget.testAttribute(Qt.WA_StyledBackground):
painter.setClipRegion(rect)
opt = QStyleOption()
opt.initFrom(widget)
widget.style().drawPrimitive(QStyle.PE_Widget, opt, painter,
widget)
def eventFilter(self, obj_, event):
if event.type() == QEvent.Paint:
self.reset()
if self.__data.seriesItem:
pe = event #XXX: cast to QPaintEvent
canvas = self.__data.seriesItem.plot().canvas()
painter = QPainter(canvas)
painter.setClipRegion(pe.region())
doCopyCache = self.testAttribute(self.CopyBackingStore)
if doCopyCache:
plotCanvas = canvas #XXX: cast to QwtPlotCanvas
if plotCanvas:
doCopyCache = qwtHasBackingStore(plotCanvas)
if doCopyCache:
painter.drawPixmap(plotCanvas.contentsRect().topLeft(),
plotCanvas.backingStore())
if not doCopyCache:
qwtRenderItem(painter, canvas.contentsRect(),
self.__data.seriesItem,
self.__data.from_, self.__data.to)
return True
return False
def legendIcon(self, index, size):
"""
:param int index: Index of the legend entry (ignored as there is only one)
:param QSizeF size: Icon size
:return: Icon representing the curve on the legend
.. seealso::
:py:meth:`qwt.plot.QwtPlotItem.setLegendIconSize()`,
:py:meth:`qwt.plot.QwtPlotItem.legendData()`
"""
if size.isEmpty():
return QwtGraphic()
graphic = QwtGraphic()
graphic.setDefaultSize(size)
graphic.setRenderHint(QwtGraphic.RenderPensUnscaled, True)
painter = QPainter(graphic)
painter.setRenderHint(QPainter.Antialiasing,
self.testRenderHint(QwtPlotItem.RenderAntialiased))
if self.__data.legendAttributes == 0 or\
(self.__data.legendAttributes & QwtPlotCurve.LegendShowBrush):
brush = self.__data.brush
if brush.style() == Qt.NoBrush and self.__data.legendAttributes == 0:
if self.style() != QwtPlotCurve.NoCurve:
brush = QBrush(self.pen().color())
elif self.__data.symbol and\
self.__data.symbol.style() != QwtSymbol.NoSymbol:
brush = QBrush(self.__data.symbol.pen().color())
if brush.style() != Qt.NoBrush:
r = QRectF(0, 0, size.width(), size.height())
painter.fillRect(r, brush)
if self.__data.legendAttributes & QwtPlotCurve.LegendShowLine:
if self.pen() != Qt.NoPen:
pn = self.pen()
# pn.setCapStyle(Qt.FlatCap)
painter.setPen(pn)
y = .5*size.height()
painter.drawLine(0., y, size.width(), y)
if self.__data.legendAttributes & QwtPlotCurve.LegendShowSymbol:
if self.__data.symbol:
r = QRectF(0, 0, size.width(), size.height())
self.__data.symbol.drawSymbol(painter, r)
return graphic
def qwtDrawBackground(painter, canvas):
painter.save()
borderClip = canvas.borderPath(canvas.rect())
if not borderClip.isEmpty():
painter.setClipPath(borderClip, Qt.IntersectClip)
brush = canvas.palette().brush(canvas.backgroundRole())
if brush.style() == Qt.TexturePattern:
pm = QPixmap(canvas.size())
QwtPainter.fillPixmap(canvas, pm)
painter.drawPixmap(0, 0, pm)
elif brush.gradient():
rects = []
if brush.gradient().coordinateMode() == QGradient.ObjectBoundingMode:
rects += [canvas.rect()]
else:
rects += [painter.clipRegion().rects()]
useRaster = False
if painter.paintEngine().type() == QPaintEngine.X11:
useRaster = True
if useRaster:
format_ = QImage.Format_RGB32
stops = brush.gradient().stops()
for stop in stops:
if stop.second.alpha() != 255:
format_ = QImage.Format_ARGB32
break
image = QImage(canvas.size(), format_)
p = QPainter(image)
p.setPen(Qt.NoPen)
p.setBrush(brush)
p.drawRects(_rects_conv_PyQt5(rects))
p.end()
painter.drawImage(0, 0, image)
else:
painter.setPen(Qt.NoPen)
painter.setBrush(brush)
painter.drawRects(_rects_conv_PyQt5(rects))
else:
painter.setPen(Qt.NoPen)
painter.setBrush(brush)
painter.drawRects(_rects_conv_PyQt5(painter.clipRegion().rects()))
painter.restore()
def toImage(self, xMap, yMap, series, from_, to, pen, antialiased,
numThreads):
if USE_THREADS:
if numThreads == 0:
numThreads = QThread.idealThreadCount()
if numThreads <= 0:
numThreads = 1
rect = self.__data.boundingRect.toAlignedRect()
image = QImage(rect.size(), QImage.Format_ARGB32)
image.fill(Qt.transparent)
if pen.width() <= 1 and pen.color().alpha() == 255:
command = QwtDotsCommand()
command.series = series
command.rgb = pen.color().rgba()
if USE_THREADS:
numPoints = int((to - from_ + 1) / numThreads)
futures = []
for i in range(numThreads):
pos = rect.topLeft()
index0 = from_ + i * numPoints
if i == numThreads - 1:
command.from_ = index0
command.to = to
qwtRenderDots(xMap, yMap, command, pos, image)
else:
command.from_ = index0
command.to = index0 + numPoints - 1
futures += [
QtConcurrent.run(qwtRenderDots, xMap, yMap,
command, pos, image)
]
for future in futures:
future.waitForFinished()
else:
command.from_ = from_
command.to = to
qwtRenderDots(xMap, yMap, command, rect.topLeft(), image)
else:
painter = QPainter(image)
painter.setPen(pen)
painter.setRenderHint(QPainter.Antialiasing, antialiased)
chunkSize = 1000
for i in range(chunkSize):
indexTo = min([i + chunkSize - 1, to])
points = self.toPoints(xMap, yMap, series, i, indexTo)
painter.drawPoints(points)
return image
def toImage(self, *args):
"""
.. py:method:: toImage()
Convert the graphic to a `QImage`
All pixels of the image get initialized by 0 ( transparent )
before the graphic is scaled and rendered on it.
The format of the image is `QImage.Format_ARGB32_Premultiplied`.
The size of the image is the default size ( ceiled to integers )
of the graphic.
:return: The graphic as image in default size
.. py:method:: toImage(size, [aspectRatioMode=Qt.IgnoreAspectRatio])
Convert the graphic to a `QImage`
All pixels of the image get initialized by 0 ( transparent )
before the graphic is scaled and rendered on it.
The format of the image is `QImage.Format_ARGB32_Premultiplied`.
:param QSize size: Size of the image
:param `Qt.AspectRatioMode` aspectRatioMode: Aspect ratio how to scale the graphic
:return: The graphic as image
.. seealso::
:py:meth:`toPixmap()`, :py:meth:`render()`
"""
if len(args) == 0:
if self.isNull():
return QImage()
sz = self.defaultSize()
w = np.ceil(sz.width())
h = np.ceil(sz.height())
image = QImage(w, h, QImage.Format_ARGB32)
image.fill(0)
r = QRect(0, 0, sz.width(), sz.height())
painter = QPainter(image)
self.render(painter, r, Qt.KeepAspectRatio)
painter.end()
return image
elif len(args) in (1, 2):
size = args[0]
aspectRatioMode = Qt.IgnoreAspectRatio
if len(args) == 2:
aspectRatioMode = args[-1]
image = QImage(size, QImage.Format_ARGB32_Premultiplied)
image.fill(0)
r = QRect(0, 0, size.width(), size.height())
painter = QPainter(image)
self.render(painter, r, aspectRatioMode)
return image
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()
def renderTo(self, plot, dest):
"""
Render a plot to a file
Supported formats are:
- pdf: Portable Document Format PDF
- ps: Postcript
- svg: Scalable Vector Graphics SVG
- all image formats supported by Qt, see QImageWriter.supportedImageFormats()
Scalable vector graphic formats like PDF or SVG are superior to
raster graphics formats.
:param qwt.plot.QwtPlot plot: Plot widget
:param str fileName: Path of the file, where the document will be stored
:param str format: Format for the document
:param QSizeF sizeMM: Size for the document in millimeters.
:param int resolution: Resolution in dots per Inch (dpi)
.. seealso::
:py:meth:`renderTo()`, :py:meth:`render()`,
:py:meth:`qwt.painter.QwtPainter.setRoundingAlignment()`
"""
if isinstance(dest, QPaintDevice):
w = dest.width()
h = dest.height()
rect = QRectF(0, 0, w, h)
elif isinstance(dest, QPrinter):
w = dest.width()
h = dest.height()
rect = QRectF(0, 0, w, h)
aspect = rect.width() / rect.height()
if aspect < 1.:
rect.setHeight(aspect * rect.width())
elif isinstance(dest, QSvgGenerator):
rect = dest.viewBoxF()
if rect.isEmpty():
rect.setRect(0, 0, dest.width(), dest.height())
if rect.isEmpty():
rect.setRect(0, 0, 800, 600)
p = QPainter(dest)
self.render(plot, p, rect)
def toPixmap(self, *args):
"""
Convert the graphic to a `QPixmap`
All pixels of the pixmap get initialized by `Qt.transparent`
before the graphic is scaled and rendered on it.
The size of the pixmap is the default size ( ceiled to integers )
of the graphic.
:return: The graphic as pixmap in default size
.. seealso::
:py:meth:`defaultSize()`, :py:meth:`toImage()`, :py:meth:`render()`
"""
if len(args) == 0:
if self.isNull():
return QPixmap()
sz = self.defaultSize()
w = np.ceil(sz.width())
h = np.ceil(sz.height())
pixmap = QPixmap(w, h)
pixmap.fill(Qt.transparent)
r = QRectF(0., 0., sz.width(), sz.height())
painter = QPainter(pixmap)
self.render(painter, r, Qt.KeepAspectRatio)
painter.end()
return pixmap
elif len(args) in (1, 2):
size = args[0]
aspectRatioMode = Qt.IgnoreAspectRatio
if len(args) == 2:
aspectRatioMode = args[-1]
pixmap = QPixmap(size)
pixmap.fill(Qt.transparent)
r = QRect(0, 0, size.width(), size.height())
painter = QPainter(pixmap)
self.render(painter, r, aspectRatioMode)
painter.end()
return pixmap
def toImage(self, xMap, yMap, series, from_, to, pen, antialiased):
"""
Translate a series into a QImage
:param qwt.scale_map.QwtScaleMap xMap: x map
:param qwt.scale_map.QwtScaleMap yMap: y map
:param series: Series of points to be mapped
:param int from_: Index of the first point to be painted
:param int to: Index of the last point to be painted
:param QPen pen: Pen used for drawing a point of the image, where a point is mapped to
:param bool antialiased: True, when the dots should be displayed antialiased
:return: Image displaying the series
"""
#TODO: rewrite this method to fix performance issue (litteral translation from C++!)
rect = self.__data.boundingRect.toAlignedRect()
image = QImage(rect.size(), QImage.Format_ARGB32)
image.fill(Qt.transparent)
if pen.width() <= 1 and pen.color().alpha() == 255:
bits = image.bits()
w = image.width()
h = image.height()
x0 = rect.topLeft().x()
y0 = rect.topLeft().y()
for i in range(from_, to + 1):
sample = series.sample(i)
x = int(xMap.transform(sample.x()) + 0.5) - x0
y = int(yMap.transform(sample.y()) + 0.5) - y0
if x >= 0 and x < w and y >= 0 and y < h:
bits[y * w + x] = pen.color().rgba()
else:
painter = QPainter(image)
painter.setPen(pen)
painter.setRenderHint(QPainter.Antialiasing, antialiased)
chunkSize = 1000
for i in range(chunkSize):
indexTo = min([i + chunkSize - 1, to])
points = self.toPoints(xMap, yMap, series, i, indexTo)
painter.drawPoints(points)
return image
def renderTo(self, plot, dest):
if isinstance(dest, QPaintDevice):
w = dest.width()
h = dest.height()
rect = QRectF(0, 0, w, h)
elif isinstance(dest, QPrinter):
w = dest.width()
h = dest.height()
rect = QRectF(0, 0, w, h)
aspect = rect.width() / rect.height()
if aspect < 1.:
rect.setHeight(aspect * rect.width())
elif isinstance(dest, QSvgGenerator):
rect = dest.viewBoxF()
if rect.isEmpty():
rect.setRect(0, 0, dest.width(), dest.height())
if rect.isEmpty():
rect.setRect(0, 0, 800, 600)
p = QPainter(dest)
self.render(plot, p, rect)
def findAscent(self, font):
dummy = "E"
white = QColor(Qt.white)
fm = self.fontmetrics(font)
pm = QPixmap(fm.width(dummy), fm.height())
pm.fill(white)
p = QPainter(pm)
p.setFont(font)
p.drawText(0, 0, pm.width(), pm.height(), 0, dummy)
p.end()
img = pm.toImage()
w = pm.width()
linebytes = w * 4
for row in range(img.height()):
line = img.scanLine(row).asstring(linebytes)
for col in range(w):
color = struct.unpack('I', line[col * 4:(col + 1) * 4])[0]
if color != white.rgb():
return fm.ascent() - row + 1
return fm.ascent()
def qwtBackgroundWidget(w):
if w.parentWidget() is None:
return w
if w.autoFillBackground():
brush = w.palette().brush(w.backgroundRole())
if brush.color().alpha() > 0:
return w
if w.testAttribute(Qt.WA_StyledBackground):
image = QImage(1, 1, QImage.Format_ARGB32)
image.fill(Qt.transparent)
painter = QPainter(image)
painter.translate(-w.rect().center())
qwtDrawStyledBackground(w, painter)
painter.end()
if qAlpha(image.pixel(0, 0)) != 0:
return w
return qwtBackgroundWidget(w.parentWidget())
def fillPixmap(self, widget, pixmap, offset=None):
if offset is None:
offset = QPoint()
rect = QRect(offset, pixmap.size())
painter = QPainter(pixmap)
painter.translate(-offset)
autoFillBrush = widget.palette().brush(widget.backgroundRole())
if not (widget.autoFillBackground() and autoFillBrush.isOpaque()):
bg = widget.palette().brush(QPalette.Window)
qwtFillRect(widget, painter, rect, bg)
if widget.autoFillBackground():
qwtFillRect(widget, painter, rect, autoFillBrush)
if widget.testAttribute(Qt.WA_StyledBackground):
painter.setClipRegion(rect)
opt = QStyleOption()
opt.initFrom(widget)
widget.style().drawPrimitive(QStyle.PE_Widget, opt, painter,
widget)
def toImage(self, xMap, yMap, series, from_, to, pen, antialiased):
"""
Translate a series into a QImage
:param qwt.scale_map.QwtScaleMap xMap: x map
:param qwt.scale_map.QwtScaleMap yMap: y map
:param series: Series of points to be mapped
:param int from_: Index of the first point to be painted
:param int to: Index of the last point to be painted
:param QPen pen: Pen used for drawing a point of the image, where a point is mapped to
:param bool antialiased: True, when the dots should be displayed antialiased
:return: Image displaying the series
"""
#TODO: rewrite this method to fix performance issue (litteral translation from C++!)
rect = self.__data.boundingRect.toAlignedRect()
image = QImage(rect.size(), QImage.Format_ARGB32)
image.fill(Qt.transparent)
if pen.width() <= 1 and pen.color().alpha() == 255:
bits = image.bits()
w = image.width()
h = image.height()
x0 = rect.topLeft().x()
y0 = rect.topLeft().y()
for i in range(from_, to+1):
sample = series.sample(i)
x = int(xMap.transform(sample.x())+0.5)-x0
y = int(yMap.transform(sample.y())+0.5)-y0
if x >= 0 and x < w and y >= 0 and y < h:
bits[y*w+x] = pen.color().rgba()
else:
painter = QPainter(image)
painter.setPen(pen)
painter.setRenderHint(QPainter.Antialiasing, antialiased)
chunkSize = 1000
for i in range(chunkSize):
indexTo = min([i+chunkSize-1, to])
points = self.toPoints(xMap, yMap, series, i, indexTo)
painter.drawPoints(points)
return image
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()
def findAscent(self, font):
dummy = "E"
white = QColor(Qt.white)
fm = self.fontmetrics(font)
pm = QPixmap(fm.width(dummy), fm.height())
pm.fill(white)
p = QPainter(pm)
p.setFont(font)
p.drawText(0, 0, pm.width(), pm.height(), 0, dummy)
p.end()
img = pm.toImage()
w = pm.width()
linebytes = w*4
for row in range(img.height()):
line = img.scanLine(row).asstring(linebytes)
for col in range(w):
color = struct.unpack('I', line[col*4:(col+1)*4])[0]
if color != white.rgb():
return fm.ascent()-row+1
return fm.ascent()
def toPixmap(self, *args):
"""
Convert the graphic to a `QPixmap`
All pixels of the pixmap get initialized by `Qt.transparent`
before the graphic is scaled and rendered on it.
The size of the pixmap is the default size ( ceiled to integers )
of the graphic.
:return: The graphic as pixmap in default size
.. seealso::
:py:meth:`defaultSize()`, :py:meth:`toImage()`, :py:meth:`render()`
"""
if len(args) == 0:
if self.isNull():
return QPixmap()
sz = self.defaultSize()
w = np.ceil(sz.width())
h = np.ceil(sz.height())
pixmap = QPixmap(w, h)
pixmap.fill(Qt.transparent)
r = QRectF(0., 0., sz.width(), sz.height())
painter = QPainter(pixmap)
self.render(painter, r, Qt.KeepAspectRatio)
painter.end()
return pixmap
elif len(args) in (1, 2):
size = args[0]
aspectRatioMode = Qt.IgnoreAspectRatio
if len(args) == 2:
aspectRatioMode = args[-1]
pixmap = QPixmap(size)
pixmap.fill(Qt.transparent)
r = QRect(0, 0, size.width(), size.height())
painter = QPainter(pixmap)
self.render(painter, r, aspectRatioMode)
painter.end()
return pixmap
def eventFilter(self, obj_, event):
if event.type() == QEvent.Paint:
self.reset()
if self.__data.seriesItem:
pe = event #XXX: cast to QPaintEvent
canvas = self.__data.seriesItem.plot().canvas()
painter = QPainter(canvas)
painter.setClipRegion(pe.region())
doCopyCache = self.testAttribute(self.CopyBackingStore)
if doCopyCache:
plotCanvas = canvas #XXX: cast to QwtPlotCanvas
if plotCanvas:
doCopyCache = qwtHasBackingStore(plotCanvas)
if doCopyCache:
painter.drawPixmap(plotCanvas.contentsRect().topLeft(),
plotCanvas.backingStore())
if not doCopyCache:
qwtRenderItem(painter, canvas.contentsRect(),
self.__data.seriesItem,
self.__data.from_, self.__data.to)
return True
return False
def legendIcon(self, index, size):
if size.isEmpty():
return QwtGraphic()
icon = QwtGraphic()
icon.setDefaultSize(size)
icon.setRenderHint(QwtGraphic.RenderPensUnscaled, True)
painter = QPainter(icon)
painter.setRenderHint(
QPainter.Antialiasing,
self.testRenderHint(QwtPlotItem.RenderAntialiased))
if self.__data.style != QwtPlotMarker.NoLine:
painter.setPen(self.__data.pen)
if self.__data.style in (QwtPlotMarker.HLine, QwtPlotMarker.Cross):
y = .5 * size.height()
QwtPainter.drawLine(painter, 0., y, size.width(), y)
if self.__data.style in (QwtPlotMarker.VLine, QwtPlotMarker.Cross):
x = .5 * size.width()
QwtPainter.drawLine(painter, x, 0., x, size.height())
if self.__data.symbol:
r = QRect(0, 0, size.width(), size.height())
self.__data.symbol.drawSymbol(painter, r)
return icon
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)
def paintEvent(self, event):
QFrame.paintEvent(self,event)
painter = QPainter(self)
painter.setClipRect(self.contentsRect())
self.drawContents(painter)
def paintEvent(self, e):
cr = self.contentsRect()
painter = QPainter(self)
painter.setClipRegion(e.region())
if self.__data.isDown:
qDrawWinButton(painter, 0, 0, self.width(), self.height(),
self.palette(), True)
painter.save()
if self.__data.isDown:
shiftSize = buttonShift(self)
painter.translate(shiftSize.width(), shiftSize.height())
painter.setClipRect(cr)
self.drawContents(painter)
if not self.__data.icon.isNull():
iconRect = QRect(cr)
iconRect.setX(iconRect.x()+self.margin())
if self.__data.itemMode != QwtLegendData.ReadOnly:
iconRect.setX(iconRect.x()+BUTTONFRAME)
iconRect.setSize(self.__data.icon.size())
iconRect.moveCenter(QPoint(iconRect.center().x(),
cr.center().y()))
painter.drawPixmap(iconRect, self.__data.icon)
painter.restore()
