Resize volume yaxis to in view range
Tyler Goodlet
parent
342a8fd30c
commit
6db3afc5c0
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@ -101,7 +101,7 @@ async def update_chart_from_quotes(
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last_bars_range = chart.bars_range()
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l, lbar, rbar, r = last_bars_range
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in_view = array[lbar - ifirst:rbar - ifirst]
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in_view = array[lbar - ifirst:rbar - ifirst + 1]
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assert in_view.size
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@ -112,11 +112,20 @@ async def update_chart_from_quotes(
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# sym = chart.name
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# mx, mn = np.nanmax(in_view[sym]), np.nanmin(in_view[sym])
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return last_bars_range, mx, max(mn, 0)
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mx_vlm_in_view = 0
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if vlm_chart:
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mx_vlm_in_view = np.max(in_view['volume'])
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return last_bars_range, mx, max(mn, 0), mx_vlm_in_view
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chart.default_view()
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last_bars_range, last_mx, last_mn = maxmin()
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(
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last_bars_range,
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last_mx,
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last_mn,
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last_mx_vlm,
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) = maxmin()
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last, volume = ohlcv.array[-1][['close', 'volume']]
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@ -139,7 +148,7 @@ async def update_chart_from_quotes(
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# present differently -> likely dark vlm
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tick_size = chart.linked.symbol.tick_size
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tick_margin = 2 * tick_size
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tick_margin = 3 * tick_size
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last_ask = last_bid = last_clear = time.time()
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chart.show()
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@ -155,6 +164,36 @@ async def update_chart_from_quotes(
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now = time.time()
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# brange, mx_in_view, mn_in_view = maxmin()
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(
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brange,
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mx_in_view,
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mn_in_view,
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mx_vlm_in_view,
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) = maxmin()
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l, lbar, rbar, r = brange
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mx = mx_in_view + tick_margin
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mn = mn_in_view - tick_margin
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# NOTE: vlm may be written by the ``brokerd`` backend
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# event though a tick sample is not emitted.
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# TODO: show dark trades differently
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# https://github.com/pikers/piker/issues/116
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array = ohlcv.array
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if vlm_chart:
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# print(f"volume: {end['volume']}")
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vlm_chart.update_curve_from_array('volume', array)
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vlm_sticky.update_from_data(*array[-1][['index', 'volume']])
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if (
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mx_vlm_in_view != last_mx_vlm or
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mx_vlm_in_view > last_mx_vlm
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):
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# print(f'mx vlm: {last_mx_vlm} -> {mx_vlm_in_view}')
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vlm_chart._set_yrange(yrange=(0, mx_vlm_in_view * 1.375))
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last_mx_vlm = mx_vlm_in_view
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for tick in quote.get('ticks', ()):
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# log.info(
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@ -180,16 +219,13 @@ async def update_chart_from_quotes(
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# set time of last graphics update
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last_clear = now
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array = ohlcv.array
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# update price sticky(s)
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end = array[-1]
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last_price_sticky.update_from_data(
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*end[['index', 'close']]
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)
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# plot bars
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# update price bar
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# update ohlc sampled price bars
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chart.update_ohlc_from_array(
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chart.name,
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array,
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@ -199,15 +235,6 @@ async def update_chart_from_quotes(
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# update vwap overlay line
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chart.update_curve_from_array('bar_wap', ohlcv.array)
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# TODO: show dark trades differently
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# https://github.com/pikers/piker/issues/116
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if vlm_chart:
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# print(f"volume: {end['volume']}")
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vlm_chart.update_curve_from_array(
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'volume', ohlcv.array
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)
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vlm_sticky.update_from_data(*end[['index', 'volume']])
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# l1 book events
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# throttle the book graphics updates at a lower rate
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# since they aren't as critical for a manual user
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@ -231,11 +258,6 @@ async def update_chart_from_quotes(
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# compute max and min trade values to display in view
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# TODO: we need a streaming minmax algorithm here, see
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# def above.
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brange, mx_in_view, mn_in_view = maxmin()
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l, lbar, rbar, r = brange
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mx = mx_in_view + tick_margin
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mn = mn_in_view - tick_margin
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# XXX: prettty sure this is correct?
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# if ticktype in ('trade', 'last'):
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@ -259,16 +281,14 @@ async def update_chart_from_quotes(
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elif ticktype in ('bid', 'bsize'):
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l1.bid_label.update_fields({'level': price, 'size': size})
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# update min price in view to keep bid on screen
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mn = min(price - tick_margin, mn)
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# update max price in view to keep ask on screen
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# in view y-range checking for auto-scale
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# update the max/min price in view to keep bid/ask on screen
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mx = max(price + tick_margin, mx)
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mn = min(price - tick_margin, mn)
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if (mx > last_mx) or (
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mn < last_mn
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):
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# print(f'new y range: {(mn, mx)}')
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chart._set_yrange(
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yrange=(mn, mx),
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# TODO: we should probably scale
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