Make `Viz.incr_info()` sample rate agnostic
Mainly it was the global (should we )increment logic that needs to be independent for the fast vs. slow chart such that the slow isn't update-shifted by the fast and vice versa. We do this using a new `'i_last_slow'` key in the `DisplayState.globalz: dict` which is singleton for each sample-rate-specific chart and works for both time and array indexing. Also, we drop some old commented `graphics.draw_last_datum()` code that never ended up being needed again inside the coordinate cache reset bloc.epoch_index_backup
Tyler Goodlet
parent
de585d2dc1
commit
fd02a60ab0
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@ -720,23 +720,14 @@ class Viz(msgspec.Struct): # , frozen=True):
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path, reset = out
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# XXX: SUPER UGGGHHH... without this we get stale cache
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# graphics that don't update until you downsampler again..
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# graphics that "smear" across the view horizontally
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# when panning and the first datum is out of view..
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if reset:
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# assign output paths to graphicis obj but
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# after a coords-cache reset.
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with graphics.reset_cache():
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# assign output paths to graphicis obj
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graphics.path = r.path
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graphics.fast_path = r.fast_path
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# XXX: we don't need this right?
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# graphics.draw_last_datum(
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# path,
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# src_array,
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# reset,
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# array_key,
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# index_field=self.index_field,
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# )
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# graphics.update()
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# profiler('.update()')
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else:
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# assign output paths to graphicis obj
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graphics.path = r.path
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@ -976,23 +967,14 @@ class Viz(msgspec.Struct): # , frozen=True):
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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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globalz = state.globalz
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if is_1m:
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state = state.hist_vars
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else:
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state = state.vars
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_, _, _, r = self.bars_range() # most recent right datum index in-view
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i_step = self.shm.array[-1][self.index_field] # last source index.
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_, _, _, r = self.bars_range()
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i_step = self.shm.array[-1][self.index_field]
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# last-in-view: is a real-time update necessary?
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# check if "last (is) in view" -> is a real-time update necessary?
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liv = r >= i_step
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# TODO: make this not loop through all vizs each time?
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# compute the first available graphic's x-units-per-pixel
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# compute the first available graphic obj's x-units-per-pixel
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# TODO: make this not loop through all vizs each time!
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uppx = self.plot.vb.x_uppx()
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# NOTE: this used to be implemented in a dedicated
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@ -1001,60 +983,64 @@ class Viz(msgspec.Struct): # , frozen=True):
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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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glast = globalz['i_last']
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i_diff = i_step - glast
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# print(f'{chart.name} TIME STEP: {i_step}')
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# i_diff = i_step - state['i_last']
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last_key = 'i_last_slow' if is_1m else 'i_last'
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globalz = state.globalz
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varz = state.hist_vars if is_1m else state.vars
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glast = globalz[last_key]
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# when the current step is now greater then the last we
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# have read from the display state globals, we presume that the
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# underlying source shm buffer has added a new sample and thus
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# we should increment the global view a step iff the last datum
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# is in view.
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should_global_increment: bool = False
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if i_step > glast:
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globalz['i_last'] = i_step
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globalz[last_key] = i_step
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should_global_increment = True
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# update global state for this chart
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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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state['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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i_diff: float = i_step - glast
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if i_diff > 0:
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varz['i_last'] = i_step
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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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i_last_append = varz['i_last_append']
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append_diff = i_step - i_last_append
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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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do_rt_update = uppx < update_uppx
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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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state['i_last_append'] = i_step
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varz['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'glast:{glast}\n'
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# f'last_append:{i_last_append}\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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# f'liv: {liv}\n'
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# f'do_append:{do_append}\n'
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# f'i_diff:{i_diff}\n'
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# f'do_rt_update: {do_rt_update}\n'
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# f'append_diff:{append_diff}\n'
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# f'should_global_increment: {should_global_increment}\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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# 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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