Event after pressing one key twice in Godot

Question

Almost every game that uses "WASD" keys for char navigation, use "A + A" and "D + D" key combinations for running left and right.

So my character is able to walk but I don't see any good running implementation in Godot.

How to implement playing of running animation when user is pressing one key twice?

upd: why it's not working?

extends KinematicBody2D

export var move_speed: float = 200
var velocity = Vector2.ZERO

var run_state = false

func test():
    var turned_right = velocity.x > 0
    var turned_left = velocity.x < 0
    
    if turned_right && run_state == false:
        $AnimatedSprite.animation = "walk"
        var run_state = true
    elif turned_right && run_state == true:
        $AnimatedSprite.animation = "run"



func _physics_process(delta):
    var input_direction = Vector2(
        Input.get_action_strength("ui_right") - Input.get_action_strength("ui_left"),
        Input.get_action_strength("ui_down") - Input.get_action_strength("ui_up"))
    velocity = input_direction.normalized() * move_speed
    
    if velocity.length() > 0:
        $AnimatedSprite.play()
    else:
        $AnimatedSprite.play("idle")

    test()

    move_and_slide(velocity)

Answer 1

I fixed everything myself.

Here's the working code:

extends KinematicBody2D

export var speed = 200
var run_state = false

func _process(delta):
    var velocity = Vector2.ZERO
    if Input.is_action_pressed("ui_right"):
        velocity.x += 1
    if Input.is_action_pressed("ui_left"):
        velocity.x -= 1
    if Input.is_action_pressed("ui_down"):
        velocity.y += 1
    if Input.is_action_pressed("ui_up"):
        velocity.y -= 1

    if velocity.length() > 0:
        velocity = velocity.normalized() * speed
        $AnimatedSprite.play()
    else:
        $AnimatedSprite.play("idle")
    
    position += velocity * delta
    
    var turned_right = Input.is_action_just_pressed("ui_right")
    
    if turned_right && run_state == false:
        $Timer.start()
        $AnimatedSprite.animation = "walk"
        $AnimatedSprite.flip_h = false
        run_state = true
    elif turned_right && run_state == true:
        $Timer.start()
        $AnimatedSprite.animation = "run"
        $AnimatedSprite.flip_h = false
        run_state = false

func _on_Timer_timeout():
    run_state = false

Still have no clue why the code above didn't work. And this way of doing a simple tasks like "D + D" is pain in ass