def drawPoints(self, painter, points, pointCount):
deviceClipping, clipRect = qwtIsClippingNeeded(painter)
if isinstance(points[0], QPointF):
if deviceClipping:
clippedPolygon = QPolygonF(pointCount)
clippedData = clippedPolygon.data()
numClippedPoints = 0
for point in points:
if clipRect.contains(point):
clippedData[numClippedPoints] = point
numClippedPoints += 1
painter.drawPoints(clippedData, numClippedPoints)
else:
painter.drawPoints(points, pointCount)
else:
if deviceClipping:
minX = np.ceil(clipRect.left())
maxX = np.floor(clipRect.right())
minY = np.ceil(clipRect.top())
maxY = np.floor(clipRect.bottom())
r = QRect(minX, minY, maxX - minX, maxY - minY)
clippedPolygon = QPolygon(pointCount)
clippedData = clippedPolygon.data()
numClippedPoints = 0
for point in points:
if r.contains(point):
clippedData[numClippedPoints] = point
numClippedPoints += 1
painter.drawPoints(clippedData, numClippedPoints)
else:
painter.drawPoints(points, pointCount)
def drawPoints(self, painter, points, pointCount):
deviceClipping, clipRect = qwtIsClippingNeeded(painter)
if isinstance(points[0], QPointF):
if deviceClipping:
clippedPolygon = QPolygonF(pointCount)
clippedData = clippedPolygon.data()
numClippedPoints = 0
for point in points:
if clipRect.contains(point):
clippedData[numClippedPoints] = point
numClippedPoints += 1
painter.drawPoints(clippedData, numClippedPoints)
else:
painter.drawPoints(points, pointCount)
else:
if deviceClipping:
minX = np.ceil(clipRect.left())
maxX = np.floor(clipRect.right())
minY = np.ceil(clipRect.top())
maxY = np.floor(clipRect.bottom())
r = QRect(minX, minY, maxX-minX, maxY-minY)
clippedPolygon = QPolygon(pointCount)
clippedData = clippedPolygon.data()
numClippedPoints = 0
for point in points:
if r.contains(point):
clippedData[numClippedPoints] = point
numClippedPoints += 1
painter.drawPoints(clippedData, numClippedPoints)
else:
painter.drawPoints(points, pointCount)
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
