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Code Issues 4 Pull Requests 6 Packages Projects Releases Wiki Activity

Fix `Viz.draw_last()` to divide by `.flat_index_ratio` for uppx index lookback

multichartz
Tyler Goodlet 2023-01-19 11:41:49 -05:00
parent b24d5b61cc
commit 1f11f7e4bf
1 changed files with 17 additions and 22 deletions
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25
piker/ui/_dataviz.py
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@ -819,6 +819,7 @@ class Viz(msgspec.Struct): # , frozen=True):
# XXX: SUPER UGGGHHH... without this we get stale cache
# graphics that "smear" across the view horizontally
# when panning and the first datum is out of view..
reset_cache = False
if (
reset_cache
):
@ -895,7 +896,8 @@ class Viz(msgspec.Struct): # , frozen=True):
# worth of data since that's all the screen
# can represent on the last column where
# the most recent datum is being drawn.
uppx = ceil(self._last_uppx)
uppx = ceil(gfx.x_uppx())
if (
(self._in_ds or only_last_uppx)
and uppx > 0
@ -903,37 +905,30 @@ class Viz(msgspec.Struct): # , frozen=True):
alt_renderer = self._alt_r
if alt_renderer:
renderer, gfx = alt_renderer
fmtr = renderer.fmtr
x = fmtr.x_1d
y = fmtr.y_1d
else:
renderer = self._src_r
fmtr = renderer.fmtr
x = fmtr.x_1d
y = fmtr.y_1d
iuppx = ceil(uppx)
if alt_renderer:
uppx *= fmtr.flat_index_ratio
iuppx = ceil(uppx / fmtr.flat_index_ratio)
y = y[-uppx:]
y = y[-iuppx:]
ymn, ymx = y.min(), y.max()
try:
iuppx = x[-uppx]
x_start = x[-iuppx]
except IndexError:
# we're less then an x-px wide so just grab the start
# datum index.
iuppx = x[0]
x_start = x[0]
gfx._last_line = QLineF(
iuppx, ymn,
x_start, ymn,
x[-1], ymx,
)
# if self.is_ohlc:
# times = self.shm.array['time']
# time_step = times[-1] - times[-2]
# # if 'hist' in self.shm.token['shm_name']
# # if self.index_step() == 1:
# # breakpoint()
# print(
# f'updating DS curve {self.name}@{time_step}s\n'
# f'drawing uppx={uppx} mxmn line: {ymn}, {ymx}'