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PoC: GUI-native crosshair cursor by timhoffm · Pull Request #30516 · matplotlib/matplotlib · GitHub

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PoC: GUI-native crosshair cursor - #30516

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PoC: GUI-native crosshair cursor#30516
timhoffm wants to merge 2 commits into
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timhoffm:crosshair-cursor

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timhoffm commented Sep 4, 2025 •
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Addresses #30515.

So far, this is a fairly minimal PoC: It adds a permanent crosshair following the mouse in Qt.
It proves that the fundamental logic is quite simple and it should be bearable to add it to all gui backends.

timhoffm commented Sep 5, 2025

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Updated version with crosshair limited to the Axes under the cursor

timhoffm mentioned this pull request Sep 5, 2025
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timhoffm mentioned this pull request Sep 15, 2025
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timhoffm mentioned this pull request Jan 12, 2026
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aman-coder03 commented Feb 12, 2026

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Hi @timhoffm thanks for sharing this PoC, it is really helpful to see how simple the Qt-side logic can be while avoiding figure redraws.
I was wondering what you see as the next step here, should this be extended backend-by-backend with similar native implementations, or would it make sense to introduce a small abstraction in backend_bases first?
i would be happy to experiment with extending this to another backend if that would be useful

timhoffm commented Feb 12, 2026

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This will likely move into the larger concept described in #30953.

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