Extend label

Question

Hello,

I try to create a label with some additional functionality by extending from the Label class:

# file: ColorLabel.gd
extends Label

var color
var count
var is_checked

func _init(clr, cnt):
    color = clr
    count = cnt
    ._init()

func _ready():
    set_text(str(count))
    add_color_override("font_color", color)

I create such aColorLabel and add them to their parent node, but they do not show up on the screen:

const ColorLabel = preload("res://ColorLabel.gd")
# ...

var label  = ColorLabel.new(count, color)
# set position, etc. 
add_child(label)

When I instead use a usual Label object, everyhing "works" as expected (i.e. the label shows up on screen, with the proper color, etc.):

var label  = Label.new()
label.set_text(str(count))
label.add_color_override("font_color", color)
# set position, etc. 
add_child(label)

Of course thats a workaround, but then I need to keep track of the color and the count in another way, so I would prefer the custom class.
Is it possible to derive from a control in such a way, and if yes, why does the custom label not show up?

Comments

I'm going to assume you're doing the add_child() and such inside one of the entry functions for the class.

This all works fine for me. I had to change the init arguments around, in your example the Color is second, when it is supposed to be the first.

extends Node2D

const ColorLabel = preload("res://ColorLabel.gd")

func _ready():

    var label  = ColorLabel.new(Color(1,0,0), 100)
    label.set_pos(Vector2(100,100))
    add_child(label)

As an aside ._init() won't do anything. The internal functions with underscores are exceptions. They don't make use of that syntax since they cannot be overridden. Each one you write in extended classes will always execute in a specific order. It can be tricky to work with so you will always want to test what they're doing if you have multiple extended classes.

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Thank you avencherus! As embarrassing as it is, it seems the wrong argument order was the cause...

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I think @avencherus comment should be best answer for this question.
would you make it as answer?
and @kuchen can take it as best. :)

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@volzhs Will do. I recall seeing a convert to answer option once before, but its not available, so I will repost it.

@kuchen Glad that was it. Wasn't sure since the other code was omitted.

Answer 1

Swap the init arguments around, in your example the Color is second, when it is supposed to be the first. func _init(clr, cnt):

extends Node2D

const ColorLabel = preload("res://ColorLabel.gd")

func _ready():

    var label  = ColorLabel.new(Color(1,0,0), 100)
    label.set_pos(Vector2(100,100))
    add_child(label)