package ui

// A simple structure to detect if the cursor has not moved or started moving again.
// hoverDetector.update must be called during each Update invocation to track the
// frame and the current cursor position.
type _hoverDetector struct {
	last_x, last_y int
	ticks          int
}

const HOVER_THRESHOLD = 60

var (
	hoverDetector _hoverDetector
	longtapHoverDetector _hoverDetector
)

func (h *_hoverDetector) update(x, y int) (ev InputEvent, ch bool) {
	if x == h.last_x && y == h.last_y {
		h.ticks = h.ticks + 1
		if h.ticks == HOVER_THRESHOLD {
			return InputEvent{HoverStart, x, y, nil}, true
		}
	} else {
		if h.ticks > HOVER_THRESHOLD {
			ev = InputEvent{HoverEnd, h.last_x, h.last_y, nil}
			ch = true
		}
		h.ticks = 0
		h.last_x, h.last_y = x, y
	}

	return
}