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cache line segments to draw

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KIU Shueng Chuan 2021-10-16 16:54:35 +08:00
parent 1e2596c9be
commit f57ad03570
1 changed files with 20 additions and 12 deletions
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32
pyqtgraph/graphicsItems/PlotCurveItem.py
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@ -449,7 +449,7 @@ class PlotCurveItem(GraphicsObject):
self.path = None
self.fillPath = None
self._mouseShape = None
#self.xDisp = self.yDisp = None
self._renderSegmentList = None
if 'name' in kargs:
self.opts['name'] = kargs['name']
@ -541,11 +541,15 @@ class PlotCurveItem(GraphicsObject):
and pen.color().alphaF() == 1.0
)
def _doDrawLineSegments(self, painter):
def _getLineSegments(self):
if self._renderSegmentList is not None:
return self._renderSegmentList
x, y = self._generatePlotData(*self.getData())
npts = len(x)
if npts < 2:
return
self._renderSegmentList = []
return self._renderSegmentList
if not hasattr(self, '_lineSegments'):
self._lineSegments = LineInstances()
@ -566,9 +570,6 @@ class PlotCurveItem(GraphicsObject):
# remove non-finite points, if any
x = x[mask]
y = y[mask]
npts = len(x)
if npts < 2:
return
elif connect == 'finite':
if not all_finite:
@ -582,6 +583,13 @@ class PlotCurveItem(GraphicsObject):
x = x[backfill_idx]
y = y[backfill_idx]
npts = len(x)
if npts < 2:
self._renderSegmentList = []
return self._renderSegmentList
segs = []
if connect in ['all', 'finite', 'array']:
memory = segments.array(npts - 1)
memory[:, 0] = x[:-1]
@ -591,7 +599,6 @@ class PlotCurveItem(GraphicsObject):
segs = segments.instances(npts - 1)
if connect_array is not None:
segs = list(itertools.compress(segs, connect_array.tolist()))
painter.drawLines(segs)
elif connect in ['pairs']:
npairs = npts // 2
@ -599,7 +606,9 @@ class PlotCurveItem(GraphicsObject):
memory[:, 0] = x[:npairs * 2]
memory[:, 1] = y[:npairs * 2]
segs = segments.instances(npairs)
painter.drawLines(segs)
self._renderSegmentList = segs
return self._renderSegmentList
@debug.warnOnException ## raising an exception here causes crash
def paint(self, p, opt, widget):
@ -652,7 +661,7 @@ class PlotCurveItem(GraphicsObject):
if sp.style() != QtCore.Qt.PenStyle.NoPen:
p.setPen(sp)
if self._shouldUseDrawLineSegments(sp):
self._doDrawLineSegments(p)
p.drawLines(self._getLineSegments())
else:
p.drawPath(self.getPath())
@ -665,7 +674,7 @@ class PlotCurveItem(GraphicsObject):
if self.opts['fillOutline'] and self.fillPath is not None:
p.drawPath(self.fillPath)
elif self._shouldUseDrawLineSegments(cp):
self._doDrawLineSegments(p)
p.drawLines(self._getLineSegments())
else:
p.drawPath(self.getPath())
profiler('drawPath')
@ -756,8 +765,7 @@ class PlotCurveItem(GraphicsObject):
def clear(self):
self.xData = None ## raw values
self.yData = None
self.xDisp = None ## display values (after log / fft)
self.yDisp = None
self._renderSegmentList = None
self.path = None
self.fillPath = None
self._mouseShape = None