CurveEditor edits a normalized x->y keyframe curve: cubic bezier segments
with per-point in/out control handles. Points are dragged with x clamped to
keep the list sorted; handles drag as offsets; double-click inserts a new
point at the cursor. Every gesture emits CurveEditorEvent requests while the
widget keeps a local working copy for fluid dragging. Pure geometry
(bezier evaluation, sampling via binary search, polyline approximation, hit
tests) is unit-tested; interaction tests cover point dragging and adding.
65 tests pass.
Mike-Solar
b2ed7a66e4