Enable/disable vlm chart yranging (TO SQUASH)
Tyler Goodlet
parent
e7ee0b343f
commit
fcbdfb4e7a
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@ -79,14 +79,14 @@ def has_vlm(ohlcv: ShmArray) -> bool:
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def update_fsp_chart(
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chart: ChartPlotWidget,
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flow,
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viz,
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graphics_name: str,
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array_key: Optional[str],
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**kwargs,
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) -> None:
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shm = flow.shm
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shm = viz.shm
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if not shm:
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return
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@ -666,7 +666,7 @@ async def open_vlm_displays(
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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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vlm_chart = linked.add_plot(
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name='volume',
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shm=shm,
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flume=flume,
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@ -682,10 +682,12 @@ 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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vlm_chart.view.enable_auto_yrange()
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# back-link the volume chart to trigger y-autoranging
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# in the ohlc (parent) chart.
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ohlc_chart.view.enable_auto_yrange(
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src_vb=chart.view,
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src_vb=vlm_chart.view,
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)
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# force 0 to always be in view
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@ -707,7 +709,7 @@ async def open_vlm_displays(
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'''
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mx = 0
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for name in names:
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ymn, ymx = chart.maxmin(name=name)
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ymn, ymx = vlm_chart.maxmin(name=name)
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mx = max(mx, ymx)
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return 0, mx
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@ -715,34 +717,33 @@ async def open_vlm_displays(
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# TODO: fix the x-axis label issue where if you put
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# the axis on the left it's totally not lined up...
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# show volume units value on LHS (for dinkus)
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# chart.hideAxis('right')
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# chart.showAxis('left')
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# vlm_chart.hideAxis('right')
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# vlm_chart.showAxis('left')
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# send back new chart to caller
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task_status.started(chart)
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task_status.started(vlm_chart)
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# should **not** be the same sub-chart widget
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assert chart.name != linked.chart.name
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assert vlm_chart.name != linked.chart.name
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# sticky only on sub-charts atm
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last_val_sticky = chart.plotItem.getAxis(
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'right')._stickies.get(chart.name)
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last_val_sticky = vlm_chart.plotItem.getAxis(
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'right')._stickies.get(vlm_chart.name)
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# read from last calculated value
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value = shm.array['volume'][-1]
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last_val_sticky.update_from_data(-1, value)
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vlm_curve = chart.update_graphics_from_flow(
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vlm_curve = vlm_chart.update_graphics_from_flow(
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'volume',
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# shm.array,
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)
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# size view to data once at outset
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chart.view._set_yrange()
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vlm_chart.view._set_yrange()
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# add axis title
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axis = chart.getAxis('right')
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axis = vlm_chart.getAxis('right')
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axis.set_title(' vlm')
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if dvlm:
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@ -782,7 +783,7 @@ async def open_vlm_displays(
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# XXX: the main chart already contains a vlm "units" axis
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# so here we add an overlay wth a y-range in
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# $ liquidity-value units (normally a fiat like USD).
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dvlm_pi = chart.overlay_plotitem(
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dvlm_pi = vlm_chart.overlay_plotitem(
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'dolla_vlm',
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index=0, # place axis on inside (nearest to chart)
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axis_title=' $vlm',
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@ -850,7 +851,7 @@ async def open_vlm_displays(
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assert isinstance(shm, ShmArray)
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assert isinstance(flume, Flume)
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flow = chart.draw_curve(
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viz = vlm_chart.draw_curve(
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name,
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shm,
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flume,
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@ -861,13 +862,7 @@ async def open_vlm_displays(
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style=style,
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pi=pi,
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)
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# TODO: we need a better API to do this..
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# specially store ref to shm for lookup in display loop
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# since only a placeholder of `None` is entered in
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# ``.draw_curve()``.
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# viz = chart._vizs[name]
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assert flow.plot is pi
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assert viz.plot is pi
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chart_curves(
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fields,
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@ -902,17 +897,17 @@ async def open_vlm_displays(
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# displayed and the curves are effectively the same minus
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# liquidity events (well at least on low OHLC periods - 1s).
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vlm_curve.hide()
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chart.removeItem(vlm_curve)
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vflow = chart._vizs['volume']
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vflow.render = False
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vlm_chart.removeItem(vlm_curve)
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vlm_viz = vlm_chart._vizs['volume']
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vlm_viz.render = False
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# avoid range sorting on volume once disabled
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# chart.view.disable_auto_yrange()
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vlm_chart.view.disable_auto_yrange()
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# Trade rate overlay
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# XXX: requires an additional overlay for
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# a trades-per-period (time) y-range.
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tr_pi = chart.overlay_plotitem(
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tr_pi = vlm_chart.overlay_plotitem(
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'trade_rates',
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# TODO: dynamically update period (and thus this axis?)
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