script for polygon button

polygon_button.gd

extends Control


signal button_down
signal button_up
signal pressed
signal on_input(event)

export var debug : bool

var _pressed : bool
var _disabled : bool

var polygon : PoolVector2Array


func set_pressed(value: bool) -> void:
	_pressed = value


func is_pressed() -> bool:
	return _pressed


func set_disabled(value: bool) -> void:
	_disabled = value
	set_process(!value)
	set_process_input(!value)


func is_disabled() -> bool:
	return _disabled


func _process(delta: float) -> void:
	if _pressed: emit_signal("pressed")


func _draw() -> void:
	if debug:
		draw_circle(Vector2(0, 0), 2, Color.red)
		draw_polygon(polygon, PoolColorArray([Color.red]))


func _input(event: InputEvent) -> void:
	if event is InputEventMouse:
		var position = get_viewport().canvas_transform.affine_inverse().xform(event.position)

		if Geometry.is_point_in_polygon(position - rect_global_position, polygon):
			if event is InputEventMouseButton:
				if event.button_index == BUTTON_LEFT:
					if event.pressed:
							_pressed = true
							emit_signal("button_down")
					else:
						if _pressed:
							_pressed = false
							emit_signal("button_up")

			emit_signal("on_input", event)
			get_tree().set_input_as_handled()