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Don't enable curve coord cache unless in step mode 

You can get a weird "last line segment" artifact if *only* that segment
is drawn and the cache is enabled, so just disable unless in step mode
at startup and re-flash as normal when new path data is appended. Add
a `.disable_cache()` method for the multi-use in the update method. Use
line style on the `._last_line: QLineF` segment as well.
windows_fixes_yo
Tyler Goodlet 2022-02-10 08:08:42 -05:00
parent 228f21d7b0
commit 71f9b5c000
1 changed files with 24 additions and 7 deletions
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29
piker/ui/_curve.py
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@ -116,6 +116,7 @@ class FastAppendCurve(pg.PlotCurveItem):
color: str = 'default_lightest',
fill_color: Optional[str] = None,
style: str = 'solid',
name: Optional[str] = None,
**kwargs
@ -124,7 +125,7 @@ class FastAppendCurve(pg.PlotCurveItem):
# TODO: we can probably just dispense with the parent since
# we're basically only using the pen setting now...
super().__init__(*args, **kwargs)
self._name = name
self._xrange: tuple[int, int] = self.dataBounds(ax=0)
# all history of curve is drawn in single px thickness
@ -137,7 +138,9 @@ class FastAppendCurve(pg.PlotCurveItem):
self.setPen(pen)
# last segment is drawn in 2px thickness for emphasis
self.last_step_pen = pg.mkPen(hcolor(color), width=2)
# self.last_step_pen = pg.mkPen(hcolor(color), width=2)
self.last_step_pen = pg.mkPen(pen, width=2)
self._last_line: QLineF = None
self._last_step_rect: QRectF = None
@ -151,6 +154,11 @@ class FastAppendCurve(pg.PlotCurveItem):
# interactions slower (such as zooming) and if so maybe if/when
# we implement a "history" mode for the view we disable this in
# that mode?
if step_mode:
# don't enable caching by default for the case where the
# only thing drawn is the "last" line segment which can
# have a weird artifact where it won't be fully drawn to its
# endpoint (something we saw on trade rate curves)
self.setCacheMode(QtWidgets.QGraphicsItem.DeviceCoordinateCache)
def update_from_array(
@ -261,10 +269,13 @@ class FastAppendCurve(pg.PlotCurveItem):
# self.path.connectPath(append_path)
path.connectPath(append_path)
# XXX: pretty annoying but, without this there's little
# artefacts on the append updates to the curve...
self.setCacheMode(QtWidgets.QGraphicsItem.NoCache)
self.prepareGeometryChange()
self.disable_cache()
flip_cache = True
if (
self._step_mode
):
self.disable_cache()
flip_cache = True
# print(f"update br: {self.path.boundingRect()}")
@ -304,6 +315,12 @@ class FastAppendCurve(pg.PlotCurveItem):
# XXX: seems to be needed to avoid artifacts (see above).
self.setCacheMode(QtWidgets.QGraphicsItem.DeviceCoordinateCache)
def disable_cache(self) -> None:
# XXX: pretty annoying but, without this there's little
# artefacts on the append updates to the curve...
self.setCacheMode(QtWidgets.QGraphicsItem.NoCache)
self.prepareGeometryChange()
def boundingRect(self):
if self.path is None:
return QtGui.QPainterPath().boundingRect()