Godot Engine Control Left & Right mouse emit signals

# Extends the functionality of the Control,
# allowing it to emit signals when the right or left mouse button is down.
# You can use this script with any Control.

extends Control

export var emit_only_when_hover = false

var left_pressed = false
var right_pressed = false

signal left_down
signal right_down

func _process(_delta: float) -> void:
    if emit_only_when_hover and !get_rect().has_point(get_local_mouse_position()):
        return

    if left_pressed:
        emit_signal("left_down")
    if right_pressed:
        emit_signal("right_down")

func _gui_input(event):
    if event is InputEventMouseButton:
        match event.button_index:
            BUTTON_LEFT:
                left_pressed = event.pressed
            BUTTON_RIGHT:
                right_pressed = event.pressed