def drawLines(self, painter, xMap, yMap, canvasRect, from_, to):
"""
Draw lines
:param QPainter painter: Painter
:param qwt.scale_map.QwtScaleMap xMap: Maps x-values into pixel coordinates.
:param qwt.scale_map.QwtScaleMap yMap: Maps y-values into pixel coordinates.
:param QRectF canvasRect: Contents rectangle of the canvas
:param int from_: Index of the first point to be painted
:param int to: Index of the last point to be painted. If to < 0 the curve will be painted to its last point.
.. seealso::
:py:meth:`draw()`, :py:meth:`drawDots()`,
:py:meth:`drawSteps()`, :py:meth:`drawSticks()`
"""
if from_ > to:
return
doAlign = QwtPainter.roundingAlignment(painter)
doFill = self.__data.brush.style() != Qt.NoBrush\
and self.__data.brush.color().alpha() > 0
clipRect = QRectF()
if self.__data.paintAttributes & self.ClipPolygons:
pw = max([1., painter.pen().widthF()])
clipRect = canvasRect.adjusted(-pw, -pw, pw, pw)
doIntegers = False
if QT_VERSION < 0x040800:
if painter.paintEngine().type() == QPaintEngine.Raster:
if not doFill:
doIntegers = True
noDuplicates = self.__data.paintAttributes & self.FilterPoints
mapper = QwtPointMapper()
mapper.setFlag(QwtPointMapper.RoundPoints, doAlign)
mapper.setFlag(QwtPointMapper.WeedOutPoints, noDuplicates)
mapper.setBoundingRect(canvasRect)
if doIntegers:
polyline = mapper.toPolygon(xMap, yMap, self.data(), from_, to)
if self.__data.paintAttributes & self.ClipPolygons:
polyline = QwtClipper().clipPolygon(clipRect.toAlignedRect(),
polyline, False)
QwtPainter.drawPolyline(painter, polyline)
else:
polyline = mapper.toPolygonF(xMap, yMap, self.data(), from_, to)
if doFill:
if painter.pen().style() != Qt.NoPen:
filled = QPolygonF(polyline)
self.fillCurve(painter, xMap, yMap, canvasRect, filled)
filled.clear()
if self.__data.paintAttributes & self.ClipPolygons:
polyline = QwtClipper().clipPolygonF(
clipRect, polyline, False)
QwtPainter.drawPolyline(painter, polyline)
else:
self.fillCurve(painter, xMap, yMap, canvasRect, polyline)
else:
if self.__data.paintAttributes & self.ClipPolygons:
polyline = QwtClipper().clipPolygonF(
clipRect, polyline, False)
QwtPainter.drawPolyline(painter, polyline)
def drawPolygon(self, painter, polygon):
deviceClipping, clipRect = qwtIsClippingNeeded(painter)
cpa = polygon
if deviceClipping:
if isinstance(polygon, QPolygonF):
cpa = QwtClipper().clipPolygonF(clipRect, polygon)
else:
cpa = QwtClipper().clipPolygon(clipRect, polygon)
painter.drawPolygon(cpa)
def drawLines(self, painter, xMap, yMap, canvasRect, from_, to):
if from_ > to:
return
doAlign = QwtPainter.roundingAlignment(painter)
doFit = (self.__data.attributes & self.Fitted)\
and self.__data.curveFitter
doFill = self.__data.brush.style() != Qt.NoBrush\
and self.__data.brush.color().alpha() > 0
clipRect = QRectF()
if self.__data.paintAttributes & self.ClipPolygons:
pw = max([1., painter.pen().widthF()])
clipRect = canvasRect.adjusted(-pw, -pw, pw, pw)
doIntegers = False
if QT_VERSION < 0x040800:
if painter.paintEngine().type() == QPaintEngine.Raster:
if not doFit and not doFill:
doIntegers = True
noDuplicates = self.__data.paintAttributes & self.FilterPoints
mapper = QwtPointMapper()
mapper.setFlag(QwtPointMapper.RoundPoints, doAlign)
mapper.setFlag(QwtPointMapper.WeedOutPoints, noDuplicates)
mapper.setBoundingRect(canvasRect)
if doIntegers:
polyline = mapper.toPolygon(xMap, yMap, self.data(), from_, to)
if self.__data.paintAttributes & self.ClipPolygons:
polyline = QwtClipper().clipPolygon(clipRect.toAlignedRect(),
polyline, False)
QwtPainter.drawPolyline(painter, polyline)
else:
polyline = mapper.toPolygonF(xMap, yMap, self.data(), from_, to)
if doFit:
polyline = self.__data.curveFitter.fitCurve(polyline)
if doFill:
if painter.pen().style() != Qt.NoPen:
filled = QPolygonF(polyline)
self.fillCurve(painter, xMap, yMap, canvasRect, filled)
filled.clear()
if self.__data.paintAttributes & self.ClipPolygons:
polyline = QwtClipper().clipPolygonF(
clipRect, polyline, False)
QwtPainter.drawPolyline(painter, polyline)
else:
self.fillCurve(painter, xMap, yMap, canvasRect, polyline)
else:
if self.__data.paintAttributes & self.ClipPolygons:
polyline = QwtClipper().clipPolygonF(
clipRect, polyline, False)
QwtPainter.drawPolyline(painter, polyline)
def fillCurve(self, painter, xMap, yMap, canvasRect, polygon):
"""
Fill the area between the curve and the baseline with
the curve brush
:param QPainter painter: Painter
:param qwt.scale_map.QwtScaleMap xMap: Maps x-values into pixel coordinates.
:param qwt.scale_map.QwtScaleMap yMap: Maps y-values into pixel coordinates.
:param QRectF canvasRect: Contents rectangle of the canvas
:param QPolygonF polygon: Polygon - will be modified !
.. seealso::
:py:meth:`setBrush()`, :py:meth:`setBaseline()`,
:py:meth:`setStyle()`
"""
if self.__data.brush.style() == Qt.NoBrush:
return
self.closePolyline(painter, xMap, yMap, polygon)
if polygon.count() <= 2:
return
brush = self.__data.brush
if not brush.color().isValid():
brush.setColor(self.__data.pen.color())
if self.__data.paintAttributes & self.ClipPolygons:
polygon = QwtClipper().clipPolygonF(canvasRect, polygon, True)
painter.save()
painter.setPen(Qt.NoPen)
painter.setBrush(brush)
QwtPainter.drawPolygon(painter, polygon)
painter.restore()
def drawSteps(self, painter, xMap, yMap, canvasRect, from_, to):
doAlign = QwtPainter.roundingAlignment(painter)
polygon = QPolygonF(2 * (to - from_) + 1)
inverted = self.orientation() == Qt.Vertical
if self.__data.attributes & self.Inverted:
inverted = not inverted
series = self.data()
ip = 0
for i in range(from_, to + 1):
sample = series.sample(i)
xi = xMap.transform(sample.x())
yi = yMap.transform(sample.y())
if doAlign:
xi = round(xi)
yi = round(yi)
if ip > 0:
p0 = polygon[ip - 2]
if inverted:
polygon[ip - 1] = QPointF(p0.x(), yi)
else:
polygon[ip - 1] = QPointF(xi, p0.y())
polygon[ip] = QPointF(xi, yi)
ip += 2
if self.__data.paintAttributes & self.ClipPolygons:
clipped = QwtClipper().clipPolygonF(canvasRect, polygon, False)
QwtPainter.drawPolyline(painter, clipped)
else:
QwtPainter.drawPolyline(painter, polygon)
if self.__data.brush.style() != Qt.NoBrush:
self.fillCurve(painter, xMap, yMap, canvasRect, polygon)
def drawPolyline(self, *args):
if len(args) == 2:
painter, polygon = args
deviceClipping, clipRect = qwtIsClippingNeeded(painter)
cpa = polygon
if deviceClipping:
if isinstance(polygon, QPolygonF):
cpa = QwtClipper().clipPolygonF(clipRect, polygon)
else:
cpa = QwtClipper().clipPolygon(clipRect, polygon)
qwtDrawPolyline(painter, cpa, cpa.size(),
self.__polylineSplitting)
elif len(args) == 3:
painter, points, pointCount = args
deviceClipping, clipRect = qwtIsClippingNeeded(painter)
if deviceClipping:
if isinstance(points[0], QPointF):
polygon = QPolygonF(points)
polygon = QwtClipper().clipPolygonF(clipRect, polygon)
else:
polygon = QPolygon(points)
polygon = QwtClipper().clipPolygon(clipRect, polygon)
qwtDrawPolyline(painter, polygon,
polygon.size(), self.__polylineSplitting)
# polygon = QPolygonF(pointCount)
# pointer = polygon.data()
# pointer.setsize(pointCount*2*np.finfo(float).dtype.itemsize)
# memory = np.frombuffer(pointer, float)
# memory[0::2] = xdata
# memory[1::2] = ydata
else:
qwtDrawPolyline(painter, points, pointCount,
self.__polylineSplitting)
else:
raise TypeError("QwtPainter.drawPolyline() takes 2 or 3 argument"\
"(s) (%s given)" % len(args))
def fillCurve(self, painter, xMap, yMap, canvasRect, polygon):
if self.__data.brush.style() == Qt.NoBrush:
return
self.closePolyline(painter, xMap, yMap, polygon)
if polygon.count() <= 2:
return
brush = self.__data.brush
if not brush.color().isValid():
brush.setColor(self.__data.pen.color())
if self.__data.paintAttributes & self.ClipPolygons:
polygon = QwtClipper().clipPolygonF(canvasRect, polygon, True)
painter.save()
painter.setPen(Qt.NoPen)
painter.setBrush(brush)
QwtPainter.drawPolygon(painter, polygon)
painter.restore()
def drawSteps(self, painter, xMap, yMap, canvasRect, from_, to):
"""
Draw steps
:param QPainter painter: Painter
:param qwt.scale_map.QwtScaleMap xMap: Maps x-values into pixel coordinates.
:param qwt.scale_map.QwtScaleMap yMap: Maps y-values into pixel coordinates.
:param QRectF canvasRect: Contents rectangle of the canvas
:param int from_: Index of the first point to be painted
:param int to: Index of the last point to be painted. If to < 0 the curve will be painted to its last point.
.. seealso::
:py:meth:`draw()`, :py:meth:`drawSticks()`,
:py:meth:`drawDots()`, :py:meth:`drawLines()`
"""
doAlign = QwtPainter.roundingAlignment(painter)
polygon = QPolygonF(2 * (to - from_) + 1)
inverted = self.orientation() == Qt.Vertical
if self.__data.attributes & self.Inverted:
inverted = not inverted
series = self.data()
ip = 0
for i in range(from_, to + 1):
sample = series.sample(i)
xi = xMap.transform(sample.x())
yi = yMap.transform(sample.y())
if doAlign:
xi = round(xi)
yi = round(yi)
if ip > 0:
p0 = polygon[ip - 2]
if inverted:
polygon[ip - 1] = QPointF(p0.x(), yi)
else:
polygon[ip - 1] = QPointF(xi, p0.y())
polygon[ip] = QPointF(xi, yi)
ip += 2
if self.__data.paintAttributes & self.ClipPolygons:
clipped = QwtClipper().clipPolygonF(canvasRect, polygon, False)
QwtPainter.drawPolyline(painter, clipped)
else:
QwtPainter.drawPolyline(painter, polygon)
if self.__data.brush.style() != Qt.NoBrush:
self.fillCurve(painter, xMap, yMap, canvasRect, polygon)
def drawPolyline(self, *args):
if len(args) == 2:
painter, polygon = args
deviceClipping, clipRect = qwtIsClippingNeeded(painter)
cpa = polygon
if deviceClipping:
if isinstance(polygon, QPolygonF):
cpa = QwtClipper().clipPolygonF(clipRect, polygon)
else:
cpa = QwtClipper().clipPolygon(clipRect, polygon)
qwtDrawPolyline(painter, cpa, cpa.size(), self.__polylineSplitting)
elif len(args) == 3:
painter, points, pointCount = args
deviceClipping, clipRect = qwtIsClippingNeeded(painter)
if deviceClipping:
if isinstance(points[0], QPointF):
polygon = QPolygonF(points)
polygon = QwtClipper().clipPolygonF(clipRect, polygon)
else:
polygon = QPolygon(points)
polygon = QwtClipper().clipPolygon(clipRect, polygon)
qwtDrawPolyline(painter, polygon, polygon.size(),
self.__polylineSplitting)
# polygon = QPolygonF(pointCount)
# pointer = polygon.data()
# pointer.setsize(pointCount*2*np.finfo(float).dtype.itemsize)
# memory = np.frombuffer(pointer, float)
# memory[0::2] = xdata
# memory[1::2] = ydata
else:
qwtDrawPolyline(painter, points, pointCount,
self.__polylineSplitting)
else:
raise TypeError("QwtPainter.drawPolyline() takes 2 or 3 argument"\
"(s) (%s given)" % len(args))