Skip to content

Fix: Optimize Cursor clearing on mouse exit to prevent lag #31426

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
tacaswell merged 9 commits into from
Apr 20, 2026
+6 −1
Merged

Fix: Optimize Cursor clearing on mouse exit to prevent lag #31426

Changes from all commits
Commits
Show all changes
9 commits
Select commit Hold shift + click to select a range
94dc3df
Fix: Prevent Cursor from forcing full canvas draw when useblit=True (…
MohitPal2005 Mar 27, 2026
f2680d7
fix: use draw_idle to clear Cursor lag on move
MohitPal2005 Mar 31, 2026
649f67a
Safeguard blitting and add test coverage for Cursor onmove
MohitPal2005 Mar 31, 2026
59f00ab
Fix MockEvent attributes and formatting in test_widgets
MohitPal2005 Apr 1, 2026
9e6816f
Remove duplicate test function
MohitPal2005 Apr 1, 2026
6f454d2
Fix: restore draw() to fix cursor rendering
MohitPal2005 Apr 3, 2026
121d89f
Fix: Optimize Cursor onmove by conditionally blitting background
MohitPal2005 Apr 18, 2026
ce80b26
Fix: Clean up git merge artifacts and restore deleted tests
MohitPal2005 Apr 18, 2026
6b91973
Test: Restore accidentally removed overlapping axis in test
MohitPal2005 Apr 18, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
7 changes: 6 additions & 1 deletion lib/matplotlib/widgets.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2119,7 +2119,12 @@ def onmove(self, event):
self.linev.set_visible(False)
self.lineh.set_visible(False)
if self.needclear:
self.canvas.draw()
background = self._load_blit_background()
if self.useblit and background is not None:
self.canvas.restore_region(background)
self.canvas.blit(self.ax.bbox)
else:
self.canvas.draw()
Comment thread
timhoffm marked this conversation as resolved.
self.needclear = False
return
self.needclear = True
Expand Down
Loading