Add multitouch support - #1510
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mlyle wants to merge 4 commits into
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See also #963 for a previous attempt to add this feature. I did not do any comparison. So this is just to make you aware of this earlier PR. |
Move in-flight stroke, interpolation, eraser, and undo state into pointer-specific contexts while keeping pointer zero for existing mouse, tablet, and geometry-tool callers. Protect transient work across concurrent pointers and support canceling an unfinished stroke without an undo entry.
Define default-off board multitouch and gesture tuning settings, expose the feature in Display preferences on Qt 6, and keep the control hidden on older Qt builds.
Intercept Qt 6 touchscreen sequences in the board and desktop annotation view. Route pen, marker, and eraser contacts through independent scene pointers; defer legacy tools through application-generated mouse events; and add sticky two-finger pan and pinch promotion on the board. Finalize touch state across tool, scene, tablet, focus, and window transitions.
Add explicit gesture, drawing, and automatic modes with board-toolbar and preference controls. Keep simultaneous contacts independent, classify pinch gestures conservatively, make native touch own the canvas over compatibility mouse input, and recover cleanly from coalesced or irregular contact state transitions.
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Rebased and targeted to dev branch. This differs from the previous pull request:
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Add support for multitouch
This fixes item #250 and allows multiple people side by side to draw simultaneously. Tested on Windows 10 on an old DTEN touchboard.