Add useSignal

packages/example/gen/godot/src/TestUi2.nodes.gen.ts

@@ -0,0 +1,5 @@
+declare module "godot" {
+    interface SceneNodes {
+        "src/TestUi2.tscn": {};
+    }
+}

packages/example/gen/godot/src/TestUi2.tscn.gen.ts

@@ -0,0 +1,6 @@
+import TestUi2 from "../../../src/TestUi2";
+declare module "godot" {
+    interface ResourceTypes {
+        "res://src/TestUi2.tscn": PackedScene<TestUi2>;
+    }
+}

packages/example/src/TestUi1.ts

@@ -8,4 +8,8 @@ export default class TestUi1 extends Control {
     _ready(): void {
         Renderer.renderComponent(this, TestUi1Component)
     }
+
+    _exit_tree(): void {
+        console.log("exit tree")
+    }
 }

packages/example/src/TestUi1Component.tsx

@@ -1,5 +1,5 @@
 import Godot, { Vector2 } from "godot"
-import { useEffect, useState } from "react"
+import { useState } from "react"
 import { Component } from "react-godot-renderer"
 
 
@@ -11,26 +11,16 @@ const Button = Component.make(Godot.Button)
 export function TestUi1Component() {
     const [text, setText] = useState("Default text")
 
-    const textEditRef = TextEdit.useUnsafeRef()
-    const buttonRef = Button.useUnsafeRef()
-
-    useEffect(() => {
-        const onTextChanged = Godot.Callable.create(() => {
-            setText(textEditRef.current.text)
+    const textEditRef = TextEdit.useRef()
+    Component.useSignal(textEditRef, "text_changed", function(this) {
+        setText(this.text)
     })
 
-        textEditRef.current.text_changed.connect(onTextChanged)
-        return () => { textEditRef.current.text_changed.disconnect(onTextChanged) }
-    }, [textEditRef.current])
-
-    useEffect(() => {
-        const onPressed = Godot.Callable.create(() => {
+    const buttonRef = Button.useRef()
+    Component.useSignal(buttonRef, "pressed", () => {
         console.log("Pressed!")
     })
 
-        buttonRef.current.pressed.connect(onPressed)
-        return () => { buttonRef.current.pressed.disconnect(onPressed) }
-    }, [buttonRef.current])
 
     return (
         <HFlowContainer

packages/example/src/TestUi2.ts

@@ -0,0 +1,9 @@
+import { Control } from "godot"
+
+
+export default class TestUi2 extends Control {
+    // Called when the node enters the scene tree for the first time.
+    _ready(): void {
+
+    }
+}

packages/example/src/TestUi2.ts.uid

@@ -0,0 +1 @@
+uid://bm1qao8uj6b1f

packages/example/src/TestUi2.tscn

@@ -0,0 +1,12 @@
+[gd_scene load_steps=2 format=3 uid="uid://b17syqj60kwx1"]
+
+[ext_resource type="Script" uid="uid://bm1qao8uj6b1f" path="res://src/TestUi2.ts" id="1_1lkkw"]
+
+[node name="TestUi2" type="Control"]
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+script = ExtResource("1_1lkkw")

packages/react-godot-renderer/src/Component.ts

@@ -1,4 +1,4 @@
-import type * as Godot from "godot"
+import Godot from "godot"
 import * as React from "react"
 
 
@@ -9,7 +9,7 @@ export type Props<T extends Godot.Node<Godot.NodePathMap>> = {
     readonly ref?: React.RefObject<T | null>
 } & {
     // biome-ignore lint/complexity/noBannedTypes: using Function here is completely fine
-    [K in keyof T as T[K] extends Function ? never : K]?: T[K]
+    [K in keyof T as T[K] extends Function | Godot.Signal ? never : K]?: T[K]
 }
 
 export interface Prototype<T extends Godot.Node<Godot.NodePathMap>> {
@@ -36,3 +36,28 @@ export const make = <T extends Godot.Node<Godot.NodePathMap>>(
     ),
     Prototype,
 )
+
+export declare namespace useSignal {
+    export type SignalNames<T extends Godot.Node<Godot.NodePathMap>> = {
+        [K in keyof T & string]: T[K] extends Godot.Signal ? K : never
+    }[keyof T & string]
+
+    export type Function<T extends Godot.Node<Godot.NodePathMap>, N extends useSignal.SignalNames<T>> = (
+        T[N] extends Godot.Signal<infer F>
+            ? (this: T, ...args: Parameters<F>) => ReturnType<F>
+            : never
+    )
+}
+
+export const useSignal = <T extends Godot.Node<Godot.NodePathMap>, N extends useSignal.SignalNames<T>>(
+    ref: React.RefObject<T | null>,
+    name: N,
+    f: useSignal.Function<T, N>,
+// biome-ignore lint/correctness/useExhaustiveDependencies: "f" is non-reactive
+): void => React.useEffect(() => {
+    if (!ref.current) return
+    const signal = ref.current[name] as Godot.Signal
+    const callable = Godot.Callable.create(ref.current, f)
+    signal.connect(callable)
+    return () => { signal.disconnect(callable) }
+}, [ref.current])