Drop x-range query from `ChartPlotWidget.maxmin()`
Move the `Viz.datums_range()` call into `Viz.maxmin()` itself thus minimizing the chart `.maxmin()` method to an ultra light wrapper around the viz call. Also move all profiling into the `Viz` method. Adjust `Viz.maxmin()` to return both the (rounded) x-range values which correspond to the range containing the y-domain min and max so that it can be used for up and coming overlay group maxmin calcs.pre_viz_calls
Tyler Goodlet
parent
53c9332e60
commit
9d3de6ec02
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@ -50,7 +50,6 @@ from ._cursor import (
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ContentsLabel,
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)
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from ..data._sharedmem import ShmArray
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from ._l1 import L1Labels
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from ._ohlc import BarItems
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from ._curve import (
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Curve,
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@ -70,12 +69,10 @@ from ..data._source import Symbol
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from ..log import get_logger
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from ._interaction import ChartView
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from ._forms import FieldsForm
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from .._profile import pg_profile_enabled, ms_slower_then
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from ._overlay import PlotItemOverlay
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from ._dataviz import Viz
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from ._search import SearchWidget
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from . import _pg_overrides as pgo
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from .._profile import Profiler
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if TYPE_CHECKING:
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from ._display import DisplayState
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@ -857,17 +854,17 @@ class ChartPlotWidget(pg.PlotWidget):
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self.sidepane: Optional[FieldsForm] = None
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# source of our custom interactions
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self.cv = cv = self.mk_vb(name)
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self.cv = self.mk_vb(name)
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pi = pgo.PlotItem(
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viewBox=cv,
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viewBox=self.cv,
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name=name,
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**kwargs,
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)
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pi.chart_widget = self
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super().__init__(
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background=hcolor(view_color),
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viewBox=cv,
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viewBox=self.cv,
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# parent=None,
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# plotItem=None,
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# antialias=True,
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@ -878,7 +875,9 @@ class ChartPlotWidget(pg.PlotWidget):
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# give viewbox as reference to chart
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# allowing for kb controls and interactions on **this** widget
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# (see our custom view mode in `._interactions.py`)
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cv.chart = self
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self.cv.chart = self
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self.pi_overlay: PlotItemOverlay = PlotItemOverlay(self.plotItem)
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# ensure internal pi matches
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assert self.cv is self.plotItem.vb
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@ -907,8 +906,6 @@ class ChartPlotWidget(pg.PlotWidget):
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# show background grid
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self.showGrid(x=False, y=True, alpha=0.3)
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self.pi_overlay: PlotItemOverlay = PlotItemOverlay(self.plotItem)
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# indempotent startup flag for auto-yrange subsys
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# to detect the "first time" y-domain graphics begin
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# to be shown in the (main) graphics view.
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@ -1302,13 +1299,6 @@ class ChartPlotWidget(pg.PlotWidget):
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If ``bars_range`` is provided use that range.
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'''
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profiler = Profiler(
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msg=f'`{str(self)}.maxmin(name={name})`: `{self.name}`',
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disabled=not pg_profile_enabled(),
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ms_threshold=ms_slower_then,
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delayed=True,
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)
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# TODO: here we should instead look up the ``Viz.shm.array``
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# and read directly from shm to avoid copying to memory first
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# and then reading it again here.
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@ -1316,36 +1306,21 @@ class ChartPlotWidget(pg.PlotWidget):
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viz = self._vizs.get(viz_key)
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if viz is None:
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log.error(f"viz {viz_key} doesn't exist in chart {self.name} !?")
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key = res = 0, 0
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return 0, 0
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else:
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(
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l,
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_,
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lbar,
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rbar,
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_,
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r,
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) = bars_range or viz.datums_range()
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profiler(f'{self.name} got bars range')
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key = lbar, rbar
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res = viz.maxmin(*key)
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res = viz.maxmin()
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if (
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res is None
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):
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log.warning(
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f"{viz_key} no mxmn for bars_range => {key} !?"
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)
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res = 0, 0
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mxmn = 0, 0
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if not self._on_screen:
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self.default_view(do_ds=False)
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self._on_screen = True
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else:
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x_range, mxmn = res
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profiler(f'yrange mxmn: {key} -> {res}')
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# print(f'{viz_key} yrange mxmn: {key} -> {res}')
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return res
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return mxmn
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def get_viz(
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self,
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@ -60,6 +60,7 @@ from ..log import get_logger
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from .._profile import (
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Profiler,
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pg_profile_enabled,
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ms_slower_then,
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)
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@ -276,7 +277,10 @@ class Viz(msgspec.Struct): # , frozen=True):
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] = (None, None)
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# cache of y-range values per x-range input.
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_mxmns: dict[tuple[int, int], tuple[float, float]] = {}
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_mxmns: dict[
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tuple[int, int],
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tuple[float, float],
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] = {}
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@property
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def shm(self) -> ShmArray:
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@ -324,32 +328,29 @@ class Viz(msgspec.Struct): # , frozen=True):
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def maxmin(
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self,
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lbar: int,
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rbar: int,
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# TODO: drop this right?
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bars_range: Optional[tuple[
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int, int, int, int, int, int
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]] = None,
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x_range: slice | tuple[int, int] | None = None,
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use_caching: bool = True,
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) -> Optional[tuple[float, float]]:
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) -> tuple[float, float] | None:
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'''
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Compute the cached max and min y-range values for a given
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x-range determined by ``lbar`` and ``rbar`` or ``None``
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if no range can be determined (yet).
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'''
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# TODO: hash the slice instead maybe?
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# https://stackoverflow.com/a/29980872
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rkey = (round(lbar), round(rbar))
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do_print: bool = False
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if use_caching:
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cached_result = self._mxmns.get(rkey)
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if cached_result:
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if do_print:
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print(
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f'{self.name} CACHED maxmin\n'
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f'{rkey} -> {cached_result}'
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name = self.name
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profiler = Profiler(
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msg=f'{name} -> `{str(self)}.maxmin()`',
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disabled=not pg_profile_enabled(),
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ms_threshold=ms_slower_then,
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delayed=True,
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)
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return cached_result
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shm = self.shm
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if shm is None:
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@ -357,6 +358,41 @@ class Viz(msgspec.Struct): # , frozen=True):
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arr = shm.array
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if x_range is None:
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(
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l,
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_,
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lbar,
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rbar,
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_,
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r,
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) = (
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# TODO: drop this yah?
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bars_range
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or self.datums_range()
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)
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profiler(f'{self.name} got bars range')
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x_range = lbar, rbar
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# TODO: hash the slice instead maybe?
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# https://stackoverflow.com/a/29980872
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ixrng = (round(lbar), round(rbar))
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do_print: bool = False
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if use_caching:
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cached_result = self._mxmns.get(ixrng)
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if cached_result:
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if do_print:
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print(
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f'{self.name} CACHED maxmin\n'
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f'{ixrng} -> {cached_result}'
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)
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return (
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ixrng,
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cached_result,
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)
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# get relative slice indexes into array
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if self.index_field == 'time':
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read_slc = slice_from_time(
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@ -376,7 +412,10 @@ class Viz(msgspec.Struct): # , frozen=True):
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slice_view = arr[read_slc]
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if not slice_view.size:
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log.warning(f'{self.name} no maxmin in view?')
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log.warning(
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f'{self.name} no maxmin in view?\n'
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f"{name} no mxmn for bars_range => {ixrng} !?"
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)
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return None
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elif self.yrange:
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@ -384,9 +423,8 @@ class Viz(msgspec.Struct): # , frozen=True):
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if do_print:
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print(
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f'{self.name} M4 maxmin:\n'
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f'{rkey} -> {mxmn}'
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f'{ixrng} -> {mxmn}'
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)
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else:
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if self.is_ohlc:
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ylow = np.min(slice_view['low'])
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@ -404,7 +442,7 @@ class Viz(msgspec.Struct): # , frozen=True):
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s = 3
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print(
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f'{self.name} MANUAL ohlc={self.is_ohlc} maxmin:\n'
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f'{rkey} -> {mxmn}\n'
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f'{ixrng} -> {mxmn}\n'
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f'read_slc: {read_slc}\n'
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# f'abs_slc: {slice_view["index"]}\n'
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f'first {s}:\n{slice_view[:s]}\n'
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@ -413,9 +451,12 @@ class Viz(msgspec.Struct): # , frozen=True):
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# cache result for input range
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assert mxmn
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self._mxmns[rkey] = mxmn
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return mxmn
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self._mxmns[ixrng] = mxmn
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profiler(f'yrange mxmn cacheing: {x_range} -> {mxmn}')
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return (
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ixrng,
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mxmn,
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)
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def view_range(self) -> tuple[int, int]:
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'''
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