Only `.maybe_downsample_graphics()` on manual changes
We don't need update graphics on every x-range change since that's what the display loop does. Instead, only on manual changes do we make manual calls into `.update_graphics_from_array()` and be sure to iterate all linked subplots and all their embedded graphics.only_draw_iv_for_ohlc
Tyler Goodlet
parent
f79f0d5a63
commit
c9d42800b4
|
|
@ -360,6 +360,7 @@ class ChartView(ViewBox):
|
|||
):
|
||||
super().__init__(
|
||||
parent=parent,
|
||||
name=name,
|
||||
# TODO: look into the default view padding
|
||||
# support that might replace somem of our
|
||||
# ``ChartPlotWidget._set_yrange()`
|
||||
|
|
@ -742,6 +743,11 @@ class ChartView(ViewBox):
|
|||
data set.
|
||||
|
||||
'''
|
||||
profiler = pg.debug.Profiler(
|
||||
disabled=not pg_profile_enabled(),
|
||||
gt=ms_slower_then,
|
||||
delayed=True,
|
||||
)
|
||||
set_range = True
|
||||
chart = self._chart
|
||||
|
||||
|
|
@ -769,9 +775,11 @@ class ChartView(ViewBox):
|
|||
# Make sure min bars/datums on screen is adhered.
|
||||
else:
|
||||
br = bars_range or chart.bars_range()
|
||||
profiler(f'got bars range: {br}')
|
||||
|
||||
# TODO: maybe should be a method on the
|
||||
# chart widget/item?
|
||||
# if False:
|
||||
if autoscale_linked_plots:
|
||||
# avoid recursion by sibling plots
|
||||
linked = self.linkedsplits
|
||||
|
|
@ -786,6 +794,7 @@ class ChartView(ViewBox):
|
|||
bars_range=br,
|
||||
autoscale_linked_plots=False,
|
||||
)
|
||||
profiler('autoscaled linked plots')
|
||||
|
||||
if set_range:
|
||||
|
||||
|
|
@ -795,6 +804,8 @@ class ChartView(ViewBox):
|
|||
|
||||
ylow, yhigh = yrange
|
||||
|
||||
profiler(f'maxmin(): {yrange}')
|
||||
|
||||
# view margins: stay within a % of the "true range"
|
||||
diff = yhigh - ylow
|
||||
ylow = ylow - (diff * range_margin)
|
||||
|
|
@ -808,6 +819,7 @@ class ChartView(ViewBox):
|
|||
yMax=yhigh,
|
||||
)
|
||||
self.setYRange(ylow, yhigh)
|
||||
profiler(f'set limits: {(ylow, yhigh)}')
|
||||
|
||||
def enable_auto_yrange(
|
||||
self,
|
||||
|
|
@ -830,7 +842,9 @@ class ChartView(ViewBox):
|
|||
# iterate those.
|
||||
# - only register this when certain downsampleable graphics are
|
||||
# "added to scene".
|
||||
src_vb.sigXRangeChanged.connect(self.maybe_downsample_graphics)
|
||||
src_vb.sigRangeChangedManually.connect(
|
||||
self.maybe_downsample_graphics
|
||||
)
|
||||
|
||||
# mouse wheel doesn't emit XRangeChanged
|
||||
src_vb.sigRangeChangedManually.connect(self._set_yrange)
|
||||
|
|
@ -844,25 +858,39 @@ class ChartView(ViewBox):
|
|||
|
||||
self._chart._static_yrange = 'axis'
|
||||
|
||||
def xs_in_px(self) -> float:
|
||||
def x_uppx(self) -> float:
|
||||
'''
|
||||
Return the "number of x units" within a single
|
||||
pixel currently being displayed for relevant
|
||||
graphics items which are our children.
|
||||
|
||||
'''
|
||||
for graphic in self._chart._graphics.values():
|
||||
xvec = graphic.pixelVectors()[0]
|
||||
if xvec:
|
||||
xpx = xvec.x()
|
||||
if xpx:
|
||||
return xpx
|
||||
else:
|
||||
continue
|
||||
return 1.0
|
||||
graphics = list(self._chart._graphics.values())
|
||||
if not graphics:
|
||||
return 0
|
||||
|
||||
graphic = graphics[0]
|
||||
xvec = graphic.pixelVectors()[0]
|
||||
if xvec:
|
||||
return xvec.x()
|
||||
else:
|
||||
return 0
|
||||
|
||||
def maybe_downsample_graphics(self):
|
||||
|
||||
uppx = self.x_uppx()
|
||||
if (
|
||||
# we probably want to drop this once we are "drawing in
|
||||
# view" for downsampled flows..
|
||||
uppx and uppx > 16
|
||||
and self._ic is not None
|
||||
):
|
||||
# don't bother updating since we're zoomed out bigly and
|
||||
# in a pan-interaction, in which case we shouldn't be
|
||||
# doing view-range based rendering (at least not yet).
|
||||
# print(f'{uppx} exiting early!')
|
||||
return
|
||||
|
||||
profiler = pg.debug.Profiler(
|
||||
disabled=not pg_profile_enabled(),
|
||||
gt=3,
|
||||
|
|
@ -871,37 +899,23 @@ class ChartView(ViewBox):
|
|||
|
||||
# TODO: a faster single-loop-iterator way of doing this XD
|
||||
chart = self._chart
|
||||
linked = self.linkedsplits
|
||||
plots = linked.subplots | {chart.name: chart}
|
||||
for chart_name, chart in plots.items():
|
||||
for name, graphics in chart._graphics.items():
|
||||
# print(f'maybe ds chart:{name} graphic:{name}')
|
||||
|
||||
for name, graphics in chart._graphics.items():
|
||||
use_vr = False
|
||||
if isinstance(graphics, BarItems):
|
||||
use_vr = True
|
||||
|
||||
# TODO: make it so we don't have to do this XD
|
||||
# if name == 'volume':
|
||||
# continue
|
||||
uppx = graphics.x_uppx()
|
||||
if (
|
||||
uppx and uppx > 16
|
||||
and self._ic is not None
|
||||
):
|
||||
# don't bother updating since we're zoomed out bigly and
|
||||
# in a pan-interaction, in which case we shouldn't be
|
||||
# doing view-range based rendering (at least not yet).
|
||||
# print(f'{uppx} exiting early!')
|
||||
return
|
||||
|
||||
use_vr = False
|
||||
if isinstance(graphics, BarItems):
|
||||
use_vr = True
|
||||
|
||||
# pass in no array which will read and render from the last
|
||||
# passed array (normally provided by the display loop.)
|
||||
chart.update_graphics_from_array(
|
||||
name,
|
||||
use_vr=use_vr,
|
||||
)
|
||||
profiler(f'updated {name}')
|
||||
# pass in no array which will read and render from the last
|
||||
# passed array (normally provided by the display loop.)
|
||||
chart.update_graphics_from_array(
|
||||
name,
|
||||
use_vr=use_vr,
|
||||
profiler=profiler,
|
||||
)
|
||||
profiler(f'range change updated {chart_name}:{name}')
|
||||
|
||||
profiler.finish()
|
||||
# for graphic in graphics:
|
||||
# ds_meth = getattr(graphic, 'maybe_downsample', None)
|
||||
# if ds_meth:
|
||||
# ds_meth()
|
||||
|
|
|
|||
Loading…
Reference in New Issue