Regenerate background when RectangleSelector active-flag is set back on. #17480
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Is this only needed for |
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And if so, maybe this should override |
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set_active calls update_background, so that's fine? |
QuLogic
approved these changes
Oct 2, 2020
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Wait, I forgot to set Also affects |
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Do you have an example where this can easily be checked? Is that just a matter of moving the |
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I essentially patched the examples to do what diff --git a/examples/widgets/polygon_selector_demo.py b/examples/widgets/polygon_selector_demo.py
index c1340679f3..68de0e0e9a 100644
--- a/examples/widgets/polygon_selector_demo.py
+++ b/examples/widgets/polygon_selector_demo.py
@@ -50,9 +50,17 @@ class SelectFromCollection:
elif len(self.fc) == 1:
self.fc = np.tile(self.fc, (self.Npts, 1))
- self.poly = PolygonSelector(ax, self.onselect)
+ self.poly = PolygonSelector(ax, self.onselect, useblit=False)
self.ind = []
+ self.cid = self.canvas.mpl_connect('key_press_event',
+ self.toggle_selector)
+
+ def toggle_selector(self, event):
+ if event.key == 't':
+ self.poly.set_active(not self.poly.active)
+ print('Selector toggled')
+
def onselect(self, verts):
path = Path(verts)
self.ind = np.nonzero(path.contains_points(self.xys))[0]
diff --git a/examples/widgets/span_selector.py b/examples/widgets/span_selector.py
index 2e720f4c98..3955c8f540 100644
--- a/examples/widgets/span_selector.py
+++ b/examples/widgets/span_selector.py
@@ -46,9 +46,17 @@ def onselect(xmin, xmax):
#
+def toggle_selector(event):
+ if event.key == 't':
+ span.set_active(not span.active)
+ print('Span toggled')
+
+
span = SpanSelector(ax1, onselect, 'horizontal', useblit=True,
rectprops=dict(alpha=0.5, facecolor='red'))
# Set useblit=True on most backends for enhanced performance.
+fig.canvas.mpl_connect('key_press_event', toggle_selector)
+
plt.show() |
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OK, moving everything to the base class seems to work. |
Otherwise, if the selector is made inactive and then back to active, the "old" selector gets captured in the background image and spurious appears. No tests because good luck with that, but can be tried with examples/widgets/rectangle_selector.py.
This was referenced Oct 2, 2020
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Otherwise, if the selector is made inactive and then back to active, the
"old" selector gets captured in the background image and spurious
appears.
No tests because good luck with that, but can be tried with
examples/widgets/rectangle_selector.py.
Closes #17476.
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