From ea5b8f1dd0447b9784599b4a606f25285c3e2324 Mon Sep 17 00:00:00 2001 From: Tyler Goodlet Date: Fri, 11 Mar 2022 14:49:34 -0500 Subject: [PATCH] Only trigger downsampling on manual changes, add a uppx method --- piker/ui/_interaction.py | 23 +++++++++++++++++++---- 1 file changed, 19 insertions(+), 4 deletions(-) diff --git a/piker/ui/_interaction.py b/piker/ui/_interaction.py index 5b0145ff..faf45c4b 100644 --- a/piker/ui/_interaction.py +++ b/piker/ui/_interaction.py @@ -363,7 +363,6 @@ class ChartView(ViewBox): # defaultPadding=0., **kwargs ) - # for "known y-range style" self._static_yrange = static_yrange self._maxmin = None @@ -430,7 +429,6 @@ class ChartView(ViewBox): def maxmin(self, callback: Callable) -> None: self._maxmin = callback - def maybe_downsample_graphics(self): for graphic in self._chart._graphics.values(): if isinstance(graphic, BarItems): @@ -442,7 +440,8 @@ class ChartView(ViewBox): axis=None, relayed_from: ChartView = None, ): - '''Override "center-point" location for scrolling. + ''' + Override "center-point" location for scrolling. This is an override of the ``ViewBox`` method simply changing the center of the zoom to be the y-axis. @@ -789,7 +788,7 @@ class ChartView(ViewBox): # iterate those. # - only register this when certain downsampleable graphics are # "added to scene". - vb.sigXRangeChanged.connect(vb.maybe_downsample_graphics) + vb.sigRangeChangedManually.connect(vb.maybe_downsample_graphics) # mouse wheel doesn't emit XRangeChanged vb.sigRangeChangedManually.connect(vb._set_yrange) @@ -800,3 +799,19 @@ class ChartView(ViewBox): ) -> None: self._chart._static_yrange = 'axis' + + def xs_in_px(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(): + # if isinstance(graphic, BarItems): + xpx = graphic.pixelVectors()[0].x() + if xpx: + return xpx + else: + continue + return 1.0