Method deliverTransferCancelEvent

io/input/pointer.go:945–957

(handlers map[event.Tag]*handler, p pointerInfo, evts []taggedEvent)

}

func (q *pointerQueue) deliverTransferCancelEvent(handlers map[event.Tag]*handler, p pointerInfo, evts []taggedEvent) (pointerInfo, []taggedEvent) {
	evts = append(evts, taggedEvent{tag: p.dataSource, event: transfer.CancelEvent{}})
	// Cancel all potential targets.
	src := &handlers[p.dataSource].filter.pointer
	for k, h := range handlers {
		if _, ok := firstMimeMatch(src, &h.filter.pointer); ok {
			evts = append(evts, taggedEvent{tag: k, event: transfer.CancelEvent{}})
		}
	}
	p.dataSource = nil
	p.dataTarget = nil
	return p, evts
}

// ClipFor clips r to the parents of area.
func (q *pointerQueue) ClipFor(area int, r image.Rectangle) image.Rectangle {