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Fix: Prevent Cursor blitting from erasing overlapping axes (#25670) #31368

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Fix: Prevent Cursor blitting from erasing overlapping axes (#25670) #31368

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Fix: Prevent Cursor blitting from erasing overlapping axes
MohitPal2005 Mar 24, 2026
0e0b72a
Fix styling: remove trailing whitespace and shorten comment
MohitPal2005 Mar 24, 2026
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11 changes: 10 additions & 1 deletion lib/matplotlib/widgets.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2119,11 +2119,20 @@ def onmove(self, event):
self.lineh.set_visible(self.visible and self.horizOn)
if not (self.visible and (self.vertOn or self.horizOn)):
return
# Redraw.
# Redraw.
if self.useblit:
background = self._load_blit_background()
if background is not None:
self.canvas.restore_region(background)

# --- UPDATED FIX STARTS HERE ---
# If there are other axes overlapping with the cursor's area,
# redraw them completely.
for ax_ in self.ax.get_figure(root=True).get_axes():
if ax_ is not self.ax and self.ax.bbox.overlaps(ax_.bbox):
self.ax.draw_artist(ax_)
# --- UPDATED FIX ENDS HERE ---

self.ax.draw_artist(self.linev)
self.ax.draw_artist(self.lineh)
self.canvas.blit(self.ax.bbox)
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