Back link auto-y-ranging to ohlc chart from vlm overlay fsp
parent
490d85aba5
commit
8f3fe8e542
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@ -814,7 +814,8 @@ class ChartPlotWidget(pg.PlotWidget):
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# a better one?
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def mk_vb(self, name: str) -> ChartView:
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cv = ChartView(name)
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cv.linkedsplits = self.linked
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# link new view to chart's view set
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cv.linked = self.linked
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return cv
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def __init__(
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@ -1179,19 +1180,27 @@ class ChartPlotWidget(pg.PlotWidget):
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)
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pi.hideButtons()
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# cv.enable_auto_yrange(self.view)
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cv.enable_auto_yrange()
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# compose this new plot's graphics with the current chart's
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# existing one but with separate axes as neede and specified.
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self.pi_overlay.add_plotitem(
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pi,
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index=index,
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# only link x-axes,
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# only link x-axes and
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# don't relay any ``ViewBox`` derived event
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# handlers since we only care about keeping charts
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# x-synced on interaction (at least for now).
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link_axes=(0,),
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)
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# connect auto-yrange callbacks *from* this new
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# view **to** this parent and likewise *from* the
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# main/parent chart back *to* the created overlay.
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cv.enable_auto_yrange(src_vb=self.view)
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# makes it so that interaction on the new overlay will reflect
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# back on the main chart (which overlay was added to).
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self.view.enable_auto_yrange(src_vb=cv)
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# add axis title
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# TODO: do we want this API to still work?
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# raxis = pi.getAxis('right')
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@ -624,6 +624,8 @@ async def open_vlm_displays(
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# built-in vlm which we plot ASAP since it's
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# usually data provided directly with OHLC history.
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shm = ohlcv
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ohlc_chart = linked.chart
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chart = linked.add_plot(
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name='volume',
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shm=shm,
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@ -639,6 +641,9 @@ async def open_vlm_displays(
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# the curve item internals are pretty convoluted.
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style='step',
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)
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ohlc_chart.view.enable_auto_yrange(
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src_vb=chart.view,
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)
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# force 0 to always be in view
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def multi_maxmin(
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