GodotComponentTest/components/ClickableComponent.cs

using System;
using Godot;
using GoDotLog;

public class ClickableComponent : Spatial {
    [Export] public string ClickName = "ClickName";

    [Signal]
    delegate void Clicked();

    public bool IsMouseOver = false;

    // private members
    private CollisionObject _collisionObject;

    // Called when the node enters the scene tree for the first time.
    public override void _Ready() {
        _collisionObject = (CollisionObject)FindNode("Area", false);
        if (_collisionObject == null) {
            GD.PrintErr("Error: could not find Area for Clickable Component!");
            return;
        }

        _collisionObject.Connect("input_event", this, nameof(OnAreaInputEvent));
        _collisionObject.Connect("mouse_entered", this, nameof(OnAreaMouseEntered));
        _collisionObject.Connect("mouse_exited", this, nameof(OnAreaMouseExited));
    }

    public void OnAreaInputEvent(Node camera, InputEvent inputEvent, Vector3 position, Vector3 normal,
        int shapeIndex) {
        if (IsMouseOver && inputEvent is InputEventMouseButton) {
            InputEventMouseButton mouseButtonEvent = (InputEventMouseButton)inputEvent;
            if (mouseButtonEvent.ButtonIndex == 1 && mouseButtonEvent.Pressed) {
                GD.Print("Clicked on Clickable Component!");
                EmitSignal("Clicked", this);
            }
        }
    }

    public void OnAreaMouseEntered() {
        IsMouseOver = true;
    }

    public void OnAreaMouseExited() {
        IsMouseOver = false;
    }
}