Wire handle for pointer-drag. Each pointermove while pressed
calls onDrag(local) with the pointer in handle's local frame;
pointer-captured so drags survive leaving the handle. The optional
onState(active) callback fires true on pointerdown and false
on pointerup/cancel — Handle uses it to drive .dragging.
Wire
handlefor pointer-drag. Each pointermove while pressed callsonDrag(local)with the pointer inhandle's local frame; pointer-captured so drags survive leaving the handle. The optionalonState(active)callback firestrueon pointerdown andfalseon pointerup/cancel —Handleuses it to drive.dragging.