def drawOutline(self, painter, xMap, yMap, from_, to):
doAlign = QwtPainter.roundingAlignment(painter)
if self.orientation() == Qt.Horizontal:
v0 = xMap.transform(self.baseline())
else:
v0 = yMap.transform(self.baseline())
if doAlign:
v0 = round(v0)
previous = QwtIntervalSample()
polygon = QPolygonF()
for i in range(from_, to + 1):
sample = self.sample(i)
if not sample.interval.isValid():
self.flushPolygon(painter, v0, polygon)
previous = sample
continue
if previous.interval.isValid():
if not qwtIsCombinable(previous.interval, sample.interval):
self.flushPolygon(painter, v0, polygon)
if self.orientation() == Qt.Vertical:
x1 = xMap.transform(sample.interval.minValue())
x2 = xMap.transform(sample.interval.maxValue())
y = yMap.transform(sample.value)
if doAlign:
x1 = round(x1)
x2 = round(x2)
y = round(y)
if polygon.size() == 0:
polygon += QPointF(x1, v0)
polygon += QPointF(x1, y)
polygon += QPointF(x2, y)
else:
y1 = yMap.transform(sample.interval.minValue())
y2 = yMap.transform(sample.interval.maxValue())
x = xMap.transform(sample.value)
if doAlign:
y1 = round(y1)
y2 = round(y2)
x = round(x)
if polygon.size() == 0:
polygon += QPointF(v0, y1)
polygon += QPointF(x, y1)
polygon += QPointF(x, y2)
previous = sample
self.flushPolygon(painter, v0, polygon)
def series_to_polyline(xMap, yMap, series, from_, to):
"""
Convert series data to QPolygon(F) polyline
"""
polyline = QPolygonF(to-from_+1)
pointer = polyline.data()
dtype, tinfo = np.float, np.finfo # integers: = np.int, np.iinfo
pointer.setsize(2*polyline.size()*tinfo(dtype).dtype.itemsize)
memory = np.frombuffer(pointer, dtype)
memory[:(to-from_)*2+1:2] = xMap.transform(series.xData()[from_:to+1])
memory[1:(to-from_)*2+2:2] = yMap.transform(series.yData()[from_:to+1])
return polyline
def series_to_polyline(xMap, yMap, series, from_, to):
"""
Convert series data to QPolygon(F) polyline
"""
polyline = QPolygonF(to - from_ + 1)
pointer = polyline.data()
dtype, tinfo = np.float, np.finfo # integers: = np.int, np.iinfo
pointer.setsize(2 * polyline.size() * tinfo(dtype).dtype.itemsize)
memory = np.frombuffer(pointer, dtype)
memory[:(to - from_) * 2 + 1:2] = xMap.transform(series.xData()[from_:to +
1])
memory[1:(to - from_) * 2 + 2:2] = yMap.transform(series.yData()[from_:to +
1])
return polyline
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 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))
