Indicator.cs

using UnityEngine;
using System.Linq;
using System.Collections;
using System.Collections.Generic;

/// <summary>
/// 調節用パラメータを表示
/// </summary>
public class Indicator : MonoBehaviour {

	[SerializeField] bool indicate = true;	//表示するか
	IParameterIndicator[] paramIndicator;
	Vector2 scrollPos;


	void Start() {
		//全てのIParameterIndicatorを取ってくる
		paramIndicator = GetAllInterfaces<IParameterIndicator>();
	}
	
	void Update() {
		//表示/非表示切り替え
		if(Input.GetKeyDown(KeyCode.Escape)) indicate = !indicate;
	}

	void OnGUI() {
		if(!indicate) return;

		Rect scrollArea = new Rect(0f, 0f, Screen.width / 2, Screen.height);
		//背景
		GUI.Box(scrollArea, "");
		//ScrollViewの開始
		GUILayout.BeginScrollView(scrollPos, GUILayout.Width(scrollArea.width), GUILayout.Height(scrollArea.height));
		foreach(IParameterIndicator e in paramIndicator) {
			e.IndicateParameter();
		}
		GUILayout.EndScrollView();
	}

	/// <summary>
	/// 全てのGameObjectから特定のインタフェースを取得する
	/// </summary>
	private T[] GetAllInterfaces<T>() {
		List<T> list = new List<T>();
		foreach (GameObject obj in UnityEngine.Object.FindObjectsOfType(typeof(GameObject))) {
			T[] interfaces = GetInterfaces<T>(obj);
			if(interfaces.Length > 0) list.AddRange(interfaces);
		}
		return list.ToArray();
	}
	/// <summary>
	/// GameObjectから特定のインタフェースを取得する
	/// </summary>
	private T[] GetInterfaces<T>(GameObject gObj) {
		MonoBehaviour[] mObjs = gObj.GetComponents<MonoBehaviour>();
		return (from a in mObjs where a.GetType().GetInterfaces().Any(k => k == typeof(T)) select (T)(object)a).ToArray();
	}
}