Always show a minimum bars during startup
This is particularly more "good looking" when we boot with a pair that doesn't have historical 1s OHLC and thus the fast chart is empty from outset. In this case it's a lot nicer to be already zoomed to a comfortable preset number of "datums in view" even when the history isn't yet filled in. Adjusts the chart display `Viz.default_view()` startup to explicitly ensure this happens via the `do_min_bars=True` flag B)log_linearized_curve_overlays
parent
12e196a6f7
commit
32339cb41a
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@ -1082,12 +1082,10 @@ class Viz(Struct):
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data_diff = last_datum - first_datum
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rl_diff = vr - vl
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rescale_to_data: bool = False
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# new_uppx: float = 1
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if rl_diff > data_diff:
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rescale_to_data = True
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rl_diff = data_diff
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new_uppx: float = data_diff / self.px_width()
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# orient by offset from the y-axis including
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# space to compensate for the L1 labels.
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@ -1097,14 +1095,28 @@ class Viz(Struct):
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offset = l1_offset
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if rescale_to_data:
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new_uppx: float = data_diff / self.px_width()
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offset = (offset / uppx) * new_uppx
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else:
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offset = (y_offset * step) + uppx*step
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# NOTE: if we are in the midst of start-up and a bunch of
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# widgets are spawning/rendering concurrently, it's likely the
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# label size above `l1_offset` won't have yet fully rendered.
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# Here we try to compensate for that ensure at least a static
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# bar gap between the last datum and the y-axis.
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if (
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do_min_bars
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and offset <= (6 * step)
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):
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offset = 6 * step
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# align right side of view to the rightmost datum + the selected
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# offset from above.
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r_reset = (self.graphics.x_last() or last_datum) + offset
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r_reset = (
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self.graphics.x_last() or last_datum
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) + offset
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# no data is in view so check for the only 2 sane cases:
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# - entire view is LEFT of data
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@ -1129,7 +1141,6 @@ class Viz(Struct):
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else:
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log.warning(f'Unknown view state {vl} -> {vr}')
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return
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else:
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# maintain the l->r view distance
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l_reset = r_reset - rl_diff
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@ -1138,7 +1149,11 @@ class Viz(Struct):
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do_min_bars
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and (r_reset - l_reset) < min_bars_from_y
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):
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l_reset = r_reset - min_bars_from_y
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l_reset = (
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(r_reset + offset)
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-
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min_bars_from_y * step
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)
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# remove any custom user yrange setttings
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if chartw._static_yrange == 'axis':
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@ -1152,7 +1167,6 @@ class Viz(Struct):
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if do_ds:
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view.interact_graphics_cycle()
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view.interact_graphics_cycle()
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def incr_info(
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self,
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@ -416,7 +416,9 @@ async def graphics_update_loop(
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ds.vlm_chart = vlm_chart
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ds.vlm_sticky = vlm_sticky
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fast_chart.main_viz.default_view()
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fast_chart.main_viz.default_view(
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do_min_bars=True,
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)
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# ds.hist_vars.update({
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# 'i_last_append': 0,
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@ -1456,7 +1458,9 @@ async def display_symbol_data(
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for fqsn, flume in feed.flumes.items():
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# size view to data prior to order mode init
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rt_chart.main_viz.default_view()
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rt_chart.main_viz.default_view(
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do_min_bars=True,
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)
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rt_linked.graphics_cycle()
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# TODO: look into this because not sure why it was
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@ -1467,7 +1471,9 @@ async def display_symbol_data(
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# determine if auto-range adjustements should be made.
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# rt_linked.subplots.pop('volume', None)
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hist_chart.main_viz.default_view()
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hist_chart.main_viz.default_view(
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do_min_bars=True,
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)
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hist_linked.graphics_cycle()
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godwidget.resize_all()
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@ -1510,10 +1516,14 @@ async def display_symbol_data(
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# default view adjuments and sidepane alignment
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# as final default UX touch.
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rt_chart.main_viz.default_view()
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rt_chart.main_viz.default_view(
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do_min_bars=True,
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)
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await trio.sleep(0)
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hist_chart.main_viz.default_view()
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hist_chart.main_viz.default_view(
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do_min_bars=True,
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)
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hist_viz = hist_chart.get_viz(fqsn)
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await trio.sleep(0)
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