Only update curve lengths on non-negative index diffs
parent
90f3db31bb
commit
704cc80708
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@ -137,6 +137,9 @@ class FastAppendCurve(pg.PlotCurveItem):
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# print(f"xrange: {self._xrange}")
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istart, istop = self._xrange
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# compute the length diffs between the first/last index entry in
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# the input data and the last indexes we have on record from the
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# last time we updated the curve index.
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prepend_length = istart - x[0]
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append_length = x[-1] - istop
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@ -149,7 +152,7 @@ class FastAppendCurve(pg.PlotCurveItem):
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# by default we only pull data up to the last (current) index
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x_out, y_out = x[:-1], y[:-1]
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if self.path is None or prepend_length:
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if self.path is None or prepend_length > 0:
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self.path = pg.functions.arrayToQPath(
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x_out,
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y_out,
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@ -177,7 +180,7 @@ class FastAppendCurve(pg.PlotCurveItem):
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# # self.path.moveTo(new_x[0], new_y[0])
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# self.path.connectPath(old_path)
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elif append_length:
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elif append_length > 0:
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if self._step_mode:
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new_x, new_y = step_path_arrays_from_1d(
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x[-append_length - 2:-1],
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