Add global `i_step` per overlay to `DisplayState`
Using a global "last index step" (via module var) obviously has problems when working with multiple feed sets in a single global app instance: any separate feed-set will be incremented according to an app-global index-step and thus won't correctly calc per-feed-set-step update info. Impl deatz: - drop `DisplayState.incr_info()` (since previously moved to `Viz`) and call that method on each appropriate `Viz` instance where necessary; further ensure the appropriate `DisplayState` instance is passed in to each call and make sure to pass a `state: DisplayState`. - add `DisplayState.hist_vars: dict` for history chart (sets) to determine the per-feed (not set) current slow chart (time) step. - add `DisplayState.globalz: dict` to house a common per-feed-set state and use it inside the new `Viz.incr_info()` such that a `should_increment: bool` can be returned and used by the display loop to determine whether to x-shift the current chart.multichartz
Tyler Goodlet
parent
1a3e2c33d9
commit
eb0216feaf
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@ -126,10 +126,6 @@ def chart_maxmin(
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)
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_i_last: int = 0
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_i_last_append: int = 0
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class DisplayState(Struct):
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'''
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Chart-local real-time graphics state container.
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@ -160,105 +156,21 @@ class DisplayState(Struct):
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'last_mx': 0,
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'last_mn': 0,
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}
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hist_vars: dict[str, Any] = {
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'tick_margin': 0,
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'i_last': 0,
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'i_last_append': 0,
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'last_mx_vlm': 0,
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'last_mx': 0,
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'last_mn': 0,
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}
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globalz: None | dict[str, Any] = None
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vlm_chart: Optional[ChartPlotWidget] = None
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vlm_sticky: Optional[YAxisLabel] = None
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wap_in_history: bool = False
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def incr_info(
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self,
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chart: Optional[ChartPlotWidget] = None,
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shm: Optional[ShmArray] = None,
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state: Optional[dict] = None, # pass in a copy if you don't
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update_state: bool = True,
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update_uppx: float = 16,
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is_1m: bool = False,
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) -> tuple:
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shm = shm or self.ohlcv
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chart = chart or self.chart
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# state = state or self.vars
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if (
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not update_state
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and state
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):
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state = state.copy()
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# compute the first available graphic's x-units-per-pixel
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uppx = chart.view.x_uppx()
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# NOTE: this used to be implemented in a dedicated
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# "increment task": ``check_for_new_bars()`` but it doesn't
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# make sense to do a whole task switch when we can just do
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# this simple index-diff and all the fsp sub-curve graphics
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# are diffed on each draw cycle anyway; so updates to the
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# "curve" length is already automatic.
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# increment the view position by the sample offset.
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# i_step = shm.index
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i_step = shm.array[-1]['time']
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# i_diff = i_step - state['i_last']
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# state['i_last'] = i_step
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global _i_last, _i_last_append
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i_diff = i_step - _i_last
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# update global state
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if (
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# state is None
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not is_1m
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and i_diff > 0
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):
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_i_last = i_step
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# append_diff = i_step - state['i_last_append']
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append_diff = i_step - _i_last_append
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# real-time update necessary?
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main_viz = chart.get_viz(chart.name)
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_, _, _, r = main_viz.bars_range()
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liv = r >= shm.index
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# update the "last datum" (aka extending the vizs graphic with
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# new data) only if the number of unit steps is >= the number of
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# such unit steps per pixel (aka uppx). Iow, if the zoom level
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# is such that a datum(s) update to graphics wouldn't span
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# to a new pixel, we don't update yet.
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do_append = (
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append_diff >= uppx
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and i_diff
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)
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if (
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do_append
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and not is_1m
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):
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_i_last_append = i_step
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# fqsn = self.flume.symbol.fqsn
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# print(
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# f'DOING APPEND => {fqsn}\n'
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# f'i_step:{i_step}\n'
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# f'i_diff:{i_diff}\n'
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# f'last:{_i_last}\n'
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# f'last_append:{_i_last_append}\n'
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# f'append_diff:{append_diff}\n'
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# f'r: {r}\n'
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# f'liv: {liv}\n'
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# f'uppx: {uppx}\n'
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# )
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do_rt_update = uppx < update_uppx
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# TODO: pack this into a struct
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return (
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uppx,
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liv,
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do_append,
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i_diff,
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append_diff,
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do_rt_update,
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)
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async def graphics_update_loop(
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@ -293,7 +205,15 @@ async def graphics_update_loop(
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hist_chart = godwidget.hist_linked.chart
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assert hist_chart
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# per-viz-set global last index tracking for global chart
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# view UX incrementing.
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globalz = {
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'i_last': 0,
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'i_last_append': 0,
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}
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dss: dict[str, DisplayState] = {}
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for fqsn, flume in feed.flumes.items():
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ohlcv = flume.rt_shm
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hist_ohlcv = flume.hist_shm
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@ -313,7 +233,8 @@ async def graphics_update_loop(
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)
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last_price_sticky.show()
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slow_pi = hist_chart._vizs[fqsn].plot
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hist_viz = hist_chart._vizs[fqsn]
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slow_pi = hist_viz.plot
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hist_last_price_sticky = slow_pi.getAxis('right')._stickies[fqsn]
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hist_last_price_sticky.update_from_data(
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*hist_ohlcv.array[-1][[
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@ -387,7 +308,8 @@ async def graphics_update_loop(
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'last_mx_vlm': last_mx_vlm,
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'last_mx': last_mx,
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'last_mn': last_mn,
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}
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},
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'globalz': globalz,
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})
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if vlm_chart:
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@ -398,15 +320,15 @@ async def graphics_update_loop(
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fast_chart.default_view()
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ds.hist_vars.update({
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'i_last_append': i_last,
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'i_last': i_last,
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})
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# TODO: probably factor this into some kinda `DisplayState`
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# API that can be reused at least in terms of pulling view
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# params (eg ``.bars_range()``).
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async def increment_history_view():
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i_last = hist_ohlcv.index
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state = ds.vars.copy() | {
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'i_last_append': i_last,
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'i_last': i_last,
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}
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_, hist_step_size_s, _ = flume.get_ds_info()
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async with flume.index_stream(
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@ -431,12 +353,11 @@ async def graphics_update_loop(
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i_diff,
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append_diff,
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do_rt_update,
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) = ds.incr_info(
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chart=hist_chart,
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shm=ds.hist_ohlcv,
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state=state,
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should_incr,
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) = hist_viz.incr_info(
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state=ds,
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is_1m=True,
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# update_state=False,
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)
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# print(
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# f'liv: {liv}\n'
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@ -557,40 +478,8 @@ def graphics_update_cycle(
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i_diff,
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append_diff,
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do_rt_update,
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) = ds.incr_info()
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# don't real-time "shift" the curve to the
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# left unless we get one of the following:
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if (
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(
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do_append
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and liv
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)
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or trigger_all
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):
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# print(f'INCREMENTING {fqsn}')
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chart.increment_view(steps=i_diff)
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main_viz.plot.vb._set_yrange(
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# yrange=(mn, mx),
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)
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# NOTE: since vlm and ohlc charts are axis linked now we don't
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# need the double increment request?
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# if vlm_chart:
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# vlm_chart.increment_view(steps=i_diff)
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profiler('view incremented')
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# frames_by_type: dict[str, dict] = {}
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# lasts = {}
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# build tick-type "frames" of tick sequences since
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# likely the tick arrival rate is higher then our
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# (throttled) quote stream rate.
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# iterate in FIFO order per tick-frame
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# if sym != fqsn:
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# continue
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should_incr,
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) = main_viz.incr_info(state=ds)
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# TODO: we should only run mxmn when we know
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# an update is due via ``do_append`` above.
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@ -621,11 +510,6 @@ def graphics_update_cycle(
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# graphic.
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clear_types = _tick_groups['clears']
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# XXX: if we wanted to iterate in "latest" (i.e. most
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# current) tick first order as an optimization where we only
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# update from the last tick from each type class.
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# last_clear_updated: bool = False
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# update ohlc sampled price bars
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if (
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do_rt_update
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@ -645,6 +529,29 @@ def graphics_update_cycle(
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# do_append=do_append,
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)
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# don't real-time "shift" the curve to the
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# left unless we get one of the following:
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if (
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(
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should_incr
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and do_append
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and liv
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)
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or trigger_all
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):
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# print(f'INCREMENTING {fqsn}')
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chart.increment_view(steps=i_diff)
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main_viz.plot.vb._set_yrange(
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# yrange=(mn, mx),
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)
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# NOTE: since vlm and ohlc charts are axis linked now we don't
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# need the double increment request?
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# if vlm_chart:
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# vlm_chart.increment_view(steps=i_diff)
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profiler('view incremented')
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# from pprint import pformat
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# frame_counts = {
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# typ: len(frame) for typ, frame in frames_by_type.items()
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@ -765,6 +672,8 @@ def graphics_update_cycle(
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)
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# check if slow chart needs a resize
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hist_viz = hist_chart._vizs[fqsn]
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(
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_,
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hist_liv,
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@ -772,15 +681,13 @@ def graphics_update_cycle(
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_,
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_,
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_,
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) = ds.incr_info(
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chart=hist_chart,
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shm=ds.hist_ohlcv,
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update_state=False,
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_,
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) = hist_viz.incr_info(
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state=ds,
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is_1m=True,
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)
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if hist_liv:
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viz = hist_chart._vizs[fqsn]
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viz.plot.vb._set_yrange(
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hist_viz.plot.vb._set_yrange(
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# yrange=hist_chart.maxmin(name=fqsn),
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)
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@ -814,7 +721,7 @@ def graphics_update_cycle(
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):
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viz.draw_last(
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array_key=curve_name,
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only_last_uppx=True,
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# only_last_uppx=True,
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)
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# volume chart logic..
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@ -1207,7 +1114,7 @@ async def display_symbol_data(
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# for zoom-interaction purposes.
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hist_chart.get_viz(fqsn).draw_last(
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array_key=fqsn,
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only_last_uppx=True,
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# only_last_uppx=True,
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)
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pis.setdefault(fqsn, [None, None])[1] = hist_chart.plotItem
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@ -1306,7 +1213,7 @@ async def display_symbol_data(
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# for zoom-interaction purposes.
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viz.draw_last(
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array_key=fqsn,
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only_last_uppx=True,
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# only_last_uppx=True,
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)
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hist_pi.vb.maxmin = partial(
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Reference in New Issue