Add test logic for range based volume curve filling

piker/ui/_chart.py

@@ -951,6 +951,7 @@ class ChartPlotWidget(pg.PlotWidget):
         *,
         yrange: Optional[tuple[float, float]] = None,
         range_margin: float = 0.06,
+        bars_range: Optional[tuple[int, int, int, int]] = None
     ) -> None:
         '''Set the viewable y-range based on embedded data.
 
@@ -974,7 +975,18 @@ class ChartPlotWidget(pg.PlotWidget):
             # Determine max, min y values in viewable x-range from data.
             # Make sure min bars/datums on screen is adhered.
 
-            l, lbar, rbar, r = self.bars_range()
+            l, lbar, rbar, r = bars_range or self.bars_range()
+
+            if self.name != 'volume':
+                vlm_chart = self.linked.subplots.get('volume')
+                if vlm_chart:
+                    vlm_chart._set_yrange(bars_range=(l, lbar, rbar, r))
+                    curve = vlm_chart._graphics['volume']
+                    # if rbar - lbar < 1500:
+                    #     # print('small range')
+                    #     curve._fill = True
+                    # else:
+                    #     curve._fill = False
 
             # figure out x-range in view such that user can scroll "off"
             # the data set up to the point where ``_min_points_to_show``

piker/ui/_display.py

@@ -19,8 +19,10 @@ Real-time display tasks for charting / graphics.
 
 '''
 from contextlib import asynccontextmanager
+from pprint import pformat
 import time
 from types import ModuleType
+from typing import Optional
 
 import numpy as np
 from pydantic import create_model
@@ -61,6 +63,7 @@ async def chart_from_quotes(
     stream: tractor.MsgStream,
     ohlcv: np.ndarray,
     wap_in_history: bool = False,
+    vlm_chart: Optional[ChartPlotWidget] = None,
 
 ) -> None:
     '''The 'main' (price) chart real-time update loop.
@@ -149,7 +152,7 @@ async def chart_from_quotes(
 
             for tick in quote.get('ticks', ()):
 
-                # print(f"CHART: {quote['symbol']}: {tick}")
+                # log.info(f"quotes: {pformat(quote['symbol'])}: {pformat(tick)}")
                 ticktype = tick.get('type')
                 price = tick.get('price')
                 size = tick.get('size')
@@ -190,6 +193,10 @@ async def chart_from_quotes(
                         # update vwap overlay line
                         chart.update_curve_from_array('bar_wap', ohlcv.array)
 
+                    if vlm_chart:
+                        print(f"volume: {end['volume']}")
+                        vlm_chart.update_curve_from_array('volume', ohlcv.array)
+
                 # l1 book events
                 # throttle the book graphics updates at a lower rate
                 # since they aren't as critical for a manual user
@@ -670,6 +677,8 @@ async def maybe_open_vlm_display(
 
     if not has_vlm(ohlcv):
         log.warning(f"{linked.symbol.key} does not seem to have volume info")
+        yield
+        return
     else:
         async with open_sidepane(
             linked, {
@@ -856,6 +865,7 @@ async def display_symbol_data(
 
         async with (
             trio.open_nursery() as ln,
+            maybe_open_vlm_display(linkedsplits, ohlcv) as vlm_chart,
         ):
             # load initial fsp chain (otherwise known as "indicators")
             ln.start_soon(
@@ -876,6 +886,7 @@ async def display_symbol_data(
                 feed.stream,
                 ohlcv,
                 wap_in_history,
+                vlm_chart,
             )
 
             ln.start_soon(
@@ -886,7 +897,6 @@ async def display_symbol_data(
             )
 
             async with (
-                maybe_open_vlm_display(linkedsplits, ohlcv),
                 open_order_mode(
                     feed,
                     chart,