CODEWITHSUNDEEP
classnodesgodotgdscript
Mana
Mana

Reputation: 382

Connecting signals without node and through node of a child - Godot

What I've been trying to do so far -

I have a class Singleton script called recipes. I have a signal launched in it. I have objects of the recipe class. One of the objects is noodles. I want to connect the signal launched to a function in noodles called after_launch. I am not sure what node to connect the signal to. I am using a class because I have multiple recipes, each having its own launched signal.

I also want to know how to connect a signal to a function in a Singleton Script - without having nodes at all.

Code I've been using for the same - 

connect("launched", self, "launched_noodle")

I do understand that using "connect" without using a node in front of it gives an error. Error -

error(3,1) Unexpected token Identifier:connect

How do I -

1) Connect it to the node on which the code is written on - w.r.t recipes and noodles. What nodes do you generally connect your signals to?

2) Connect when I just want to connect it to the Singleton Script.

I tried to Google the problem and came across this question on Godot Forum for a similar issue. I don't understand the full question or answer. Perhaps might be a help for you to refer to.

Additional Information -

Code of my class (Singleton)recipe

extends Node2D
class_name recipe
signal launched

Code of noodles and other children - 

extends recipe
connect("launched", self, "launched_noodle")

The flow of Code -

User triggers thecooking station and the cooking station node opens up on the screen.

After that, the user's level and other parameters are checked and an appropriate recipe is shown on the screen. This recipe is a defined class - a Godot Singleton - and has many physical nodes linked under cooking station

Once the appropriate node is targetted and shown on the screen, the signal that I wanted to launch should be emitted by cooking station. This signal - depending on the node is it emitted on, makes certain changes on the screen. That is through a function named launched_recipename

Upvotes: 2

Views: 2447

Answers (1)

rcorre
rcorre

Reputation: 7228

The error Unexpected token Identifier:connect occurs because connect is a function, so you need to call it within the scope of another function, like _ready. Based on the flow you describe, it sounds like launched should be a signal defined in the cooking station, not recipe, so you might have something like this:

  • CookingStation (defines the signal launched)
    • Noodles (defines the function _on_launched)

In Noodles.gd:

extends Recipe

func _on_launched():
    print("Noodles was launched")

func _ready():
    var cooking_station = get_parent()
    cooking_station.connect("launched", self, "_on_launched")

There's really no need for a Singleton here. If you were thinking you needed a Singleton so Noodles could inherit from Recipe, it isn't necessary. Just adding the class_name Recipe directive will put Recipe in the global scope so other scripts can inherit from it.

Upvotes: 0

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