PoC: GUI-native crosshair cursor#30516
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Updated version with crosshair limited to the Axes under the cursor 
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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. |
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This will likely move into the larger concept described in #30953. |
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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.