Redesign pinch zoom and improve its behavior #13595
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This is an early work in progress that aims to properly define the behavior of pinch zoom (a part of
WheelZoomTool
). This is partially a follow up after PR #12831, though the problem with this kind of zoom was known for a long time. The underlying pinch gesture works correctly, as can be seen when pinch resizingBoxAnnotation
. I'm actually reusing the logic from that annotation to maintain state during handling of pinch gesture in the zoom tool.