ICTS_2021/Unity3/Assets/GameCore/FireInputController.cs

using UnityEngine;
using System.Collections;
using UnityEngine.UI;
using UnityEngine.EventSystems;

/// <summary>
/// Fire input controller is responsible for detecting clicks through NGUI.
/// This resides on a gameObject with a box collider inside the UI hierarchy.
/// The collider should be at the back of the UI hierarchy. This will allow
/// pickups and buttons to have higher priority than firing.
/// </summary>
//[RequireComponent(typeof(BoxCollider))]
public class FireInputController : MonoBehaviour
{
	bool _isTakingInput = true;

	bool _hasMouseBeenPressed;
    private PointerEventData _data;
	public Canvas Canvas;

	static CanvasScaler _canvasScaler;


	public static Vector3 UnscaleEventDelta(Vector3 vec)
	{
		Vector2 referenceResolution = _canvasScaler.referenceResolution;
		Vector2 currentResolution = new Vector2(Screen.width, Screen.height);

		float widthRatio = currentResolution.x / referenceResolution.x;
		float heightRatio = currentResolution.y / referenceResolution.y;
		float ratio = Mathf.Lerp(widthRatio, heightRatio, _canvasScaler.matchWidthOrHeight);

		return vec / ratio;
	}
	void Awake()
	{
		_canvasScaler = Canvas.GetComponent<CanvasScaler>();
		NotificationCenter.AddListener(OnGameStart, NotificationType.GameStart);
		NotificationCenter.AddListener(OnStartSpawningEnemies, NotificationType.StartSpawningEnemies);
		NotificationCenter.AddListener(OnStartReplay, NotificationType.StartReplay);
		NotificationCenter.AddListener(OnEndReplay, NotificationType.EndReplay);
	}

	void OnDestroy()
	{
		NotificationCenter.RemoveListener(OnGameStart, NotificationType.GameStart);
		NotificationCenter.RemoveListener(OnStartSpawningEnemies, NotificationType.StartSpawningEnemies);
		NotificationCenter.RemoveListener(OnStartReplay, NotificationType.StartReplay);
		NotificationCenter.RemoveListener(OnEndReplay, NotificationType.EndReplay);
	}

	public void OnPress(bool isPressed)
	{
		if (isPressed &&
			_isTakingInput)
		{
#if LEVEL_EDITOR
			//ignore clicks for the level editor controls
			if ((Input.mousePosition.x < 250 && Input.mousePosition.y > Screen.height - 200) ||
				(Input.mousePosition.y < 50)) //for the scroll bar
			{
				return;
			}
#endif
			//process it in FixedUpdate for recording ticks purposes and playing back 100% reliably
			_hasMouseBeenPressed = true;
		}
	}
	public void OnBeginDrag(PointerEventData data)
	{
		_data = data;
		Debug.Log("OnBeginDrag: " + data.position);
	}
	public void CustomFixedUpdate()
	{
		if (_hasMouseBeenPressed/* && _data!=null*/)
		{
			var vec = UnscaleEventDelta(Input.mousePosition);
			NotificationCenter.Post(NotificationType.Fire, new Vector2(vec.x, vec.y));
			_hasMouseBeenPressed = false;
		}
	}

	void OnGameStart(Notification note)
	{
		_isTakingInput = false;
	}

	void OnStartSpawningEnemies(Notification note)
	{
		_isTakingInput = true;
	}

	void OnStartReplay(Notification note)
	{
		_isTakingInput = false;
	}

	void OnEndReplay(Notification note)
	{
		_isTakingInput = true;
	}
}