Guard against empty source history slice output
parent
064d185395
commit
b71e8c5e6d
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@ -256,7 +256,8 @@ def render_baritems(
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reset: bool,
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reset: bool,
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) -> None:
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) -> None:
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lasts = src_data[-2:]
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lasts = src_data[-2:]
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x, y = lasts['index'], lasts['close']
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x = lasts['index']
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y = lasts['close']
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# draw the "current" step graphic segment so it
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# draw the "current" step graphic segment so it
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# lines up with the "middle" of the current
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# lines up with the "middle" of the current
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@ -717,7 +718,7 @@ class Flow(msgspec.Struct): # , frozen=True):
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# - determine downsampling ops if needed
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# - determine downsampling ops if needed
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# - (incrementally) update ``QPainterPath``
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# - (incrementally) update ``QPainterPath``
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path, data, reset = r.render(
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out = r.render(
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read,
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read,
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array_key,
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array_key,
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profiler,
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profiler,
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@ -738,6 +739,12 @@ class Flow(msgspec.Struct): # , frozen=True):
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**rkwargs,
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**rkwargs,
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)
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)
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if not out:
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log.warning(f'{self.name} failed to render!?')
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return graphics
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path, data, reset = out
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# XXX: SUPER UGGGHHH... without this we get stale cache
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# XXX: SUPER UGGGHHH... without this we get stale cache
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# graphics that don't update until you downsampler again..
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# graphics that don't update until you downsampler again..
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if reset:
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if reset:
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@ -974,7 +981,7 @@ class Renderer(msgspec.Struct):
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# the target display(s) on the sys.
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# the target display(s) on the sys.
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# if no_path_yet:
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# if no_path_yet:
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# graphics.path.reserve(int(500e3))
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# graphics.path.reserve(int(500e3))
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path=path, # path re-use / reserving
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# path=path, # path re-use / reserving
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)
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)
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# avoid mem allocs if possible
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# avoid mem allocs if possible
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@ -1113,6 +1120,9 @@ class Renderer(msgspec.Struct):
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# xy-path data transform: convert source data to a format
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# xy-path data transform: convert source data to a format
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# able to be passed to a `QPainterPath` rendering routine.
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# able to be passed to a `QPainterPath` rendering routine.
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if not len(hist):
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return
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x_out, y_out, connect = self.format_xy(
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x_out, y_out, connect = self.format_xy(
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self,
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self,
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# TODO: hist here should be the pre-sliced
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# TODO: hist here should be the pre-sliced
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