pikers
/
piker
3
0
Fork 0
Code Issues 5 Pull Requests 7 Packages Projects Releases Wiki Activity

Disable coordinate caching on OHLC ds curves to avoid smearing

overlays_interaction_latency_tuning
Tyler Goodlet 2023-01-19 11:42:13 -05:00
parent 5d9b7c72b3
commit 1a10514cad
1 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
piker/ui/_curve.py
View File

@ -112,6 +112,7 @@ class Curve(FlowGraphic):
updates don't trigger a full path redraw. updates don't trigger a full path redraw.
''' '''
cache_mode: int = QGraphicsItem.DeviceCoordinateCache
def __init__( def __init__(
self, self,
@ -178,7 +179,7 @@ class Curve(FlowGraphic):
# only thing drawn is the "last" line segment which can # only thing drawn is the "last" line segment which can
# have a weird artifact where it won't be fully drawn to its # have a weird artifact where it won't be fully drawn to its
# endpoint (something we saw on trade rate curves) # endpoint (something we saw on trade rate curves)
self.setCacheMode(QGraphicsItem.DeviceCoordinateCache) self.setCacheMode(self.cache_mode)
# XXX-NOTE-XXX: graphics caching. # XXX-NOTE-XXX: graphics caching.
# see explanation for different caching modes: # see explanation for different caching modes:
@ -382,6 +383,9 @@ class Curve(FlowGraphic):
# (via it's max / min) even when highly zoomed out. # (via it's max / min) even when highly zoomed out.
class FlattenedOHLC(Curve): class FlattenedOHLC(Curve):
# avoids strange dragging/smearing artifacts when panning..
cache_mode: int = QGraphicsItem.NoCache
def draw_last_datum( def draw_last_datum(
self, self,
path: QPainterPath, path: QPainterPath,