extends Node2D

var mouse_in_window
var following
var diff = Vector2.ZERO
var last_mouse = Vector2.ZERO

func _ready() -> void:
	Triggerer.listen("released", _on_released)


func _on_released(_data):
	if mouse_in_window:
		get_window().grab_focus()


func _notification(blah):
	match blah:
		NOTIFICATION_WM_MOUSE_EXIT:
			mouse_in_window = false
		NOTIFICATION_WM_MOUSE_ENTER:
			mouse_in_window = true
			
			if not Persister.get_value("grabbing"):
				get_window().grab_focus()


func _process(delta: float) -> void:
	if Input.is_action_just_pressed("right_click") and mouse_in_window:
		following = true
	
	if Input.is_action_just_released("right_click"):
		following = false
	
	var mouse = get_tree().root.get_mouse_position()
	if following:
		diff += (mouse - last_mouse) * 4
	
	var x = floor(diff.x)
	var y = floor(diff.y)
	
	get_parent().position += Vector2i(x, y)
	
	diff -= Vector2(x, y)
	
	last_mouse = mouse