Swipe Detector Godot

SwipeDetector.gd

extends Node2D

signal swipe(direction)

var swipe_start = null
var minimum_drag = 100

func _unhandled_input(event):
	if event.is_action_pressed("ui_click"):
		swipe_start = get_global_mouse_position()
	if event.is_action_released("ui_click"):
		_calculate_swipe(get_global_mouse_position())

func _calculate_swipe(swipe_end):
	if swipe_start == null:
		return

	var swipe = swipe_end - swipe_start

	if abs(swipe.x) > minimum_drag:
		if swipe.x > 0:
			print("SWIPE RIGHT")
			emit_signal("swipe", "right")
		else:
			print("SWIPE LEFT")
			emit_signal("swipe", "left")

	if abs(swipe.y) > minimum_drag:
		if swipe.y > 0:
			print("SWIPE DOWN")
			emit_signal("swipe", "down")
		else:
			print("SWIPE UP")
			emit_signal("swipe", "up")