A pinch already zoomed the canvas and a second finger already cancelled the
first finger's press, but dragging two fingers together did nothing: the
canvas only read wheel scrolls, and a touch screen sends touches. The fingers'
movement (egui's multi-touch translation) now scrolls the canvas under either
Zoom with Mouse Wheel setting, and zoom and scroll apply in the same frame, so
a pinch that also slides pans too. Trackpads send scrolls, so nothing counts
twice.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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