is_action_just_pressed is gone, what to use now?

Question

EDIT:
it appears is_action_just_pressed comes from a development version, but the below chess game doesn't load into the v3 alpha development version, it must have been made for some other development version... in any case, it doesn't load into version 3 even after renaming editor.cfg to project.godot

I downloaded a chess project from here:
https://github.com/Morocat/Chess

the godot project did not run because it used

if (Input.is_action_just_pressed("ui_select")):

to determine if you just clicked a place on the board, the game would then would highlight the possible places to move on the board by coloring the squares differently

unfortunately Input.is_action_just_pressed appears to be removed from the engine, only Input.is_action_pressed remains. Using the latter causes the highlighted squares to rapidly toggle and most of the time, the squares don't remain highlighted after a mouse click.

So what do we use now when we need to do something only once when ui_select is triggered?

Comments

The "just_pressed/released" is on the 2.2-legacy (unreleased) version too, that project may be using that one.

Answer 1

Suggestion one:

var ui_select_pressed = false

func _process(delta):

    if Input.is_action_pressed("ui_select"):
        if not ui_select_pressed:
            ui_select_pressed = true
            ## done once when the key is pressed

    elif ui_select_pressed:
        ui_select_pressed = false
        ## done once when the key is released

Suggestion two:

var pressed = {}

func is_action_just_pressed(action):

    if Input.is_action_pressed(action):
        if not pressed.has(action) or not pressed[action]:
            pressed[action] = true
            return true
    else:
        pressed[action] = false
    return false

func _process(delta):

    if is_action_just_pressed("ui_select"):
        ## done once when the key is pressed