Check if any child of control is pressed

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:information_source: Attention Topic was automatically imported from the old Question2Answer platform.
:bust_in_silhouette: Asked By Titox

I have a control node with over 100 button children.How can I simply check if any of the button children are clicked or do I have to manually attach a signal to each one?

2
:bust_in_silhouette: Reply From: Thomas Karcher

You can use a short script to automatically connect them at startup:

func _ready():
    var button_parent = $Node2D/.../Control # path to parent node
    for b in button_parent.get_children():
        b.connect("pressed", self, "_on_Button_pressed")

func _on_Button_pressed():
    print ("One of the buttons is pressed.")

Nice but is there a way I could chnage the scenE according to which BUTTON WAS PRESSED

Titox | 2019-09-05 00:19

Yes, that’s possible by passing the sender as parameter:

func _ready():
    var button_parent = $Node2D/.../Control # path to parent node
    for b in button_parent.get_children():
        b.connect("pressed", self, "_on_Button_pressed", [b])

func _on_Button_pressed(which : Button):
    print ("Button " + which.text + " was pressed.")

Thomas Karcher | 2019-09-05 09:40

I can change that which to anything right?

Titox | 2019-09-06 00:33

Sure. It’s just an arbitrary name for the variable receiving the value defined in the connect method. Did you notice I added a fourth parameter (“[b]”) in the connect method above? That’s how the callback function receives additional information about the sender (or any other additional information you want to transmit with the signal).

Thomas Karcher | 2019-09-06 08:05