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Assets/Photon/PhotonUnityNetworking/Demos/DemoHub/Scripts/ToDemoHubButton.cs

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+// --------------------------------------------------------------------------------------------------------------------
+// <copyright file="ToDemoHubButton.cs" company="Exit Games GmbH">
+//   Part of: Photon Unity Demos
+// </copyright>
+// <summary>
+//  Present a button on all launched demos from hub to allow getting back to the demo hub.
+// </summary>
+// <author>developer@exitgames.com</author>
+// --------------------------------------------------------------------------------------------------------------------
+
+using UnityEngine;
+using UnityEngine.SceneManagement;
+using UnityEngine.EventSystems;
+
+namespace Photon.Pun.Demo.Hub
+{
+	/// <summary>
+	/// Present a button on all launched demos from hub to allow getting back to the demo hub.
+	/// </summary>
+	public class ToDemoHubButton : MonoBehaviour
+	{
+
+		private static ToDemoHubButton instance;
+
+
+		CanvasGroup _canvasGroup;
+
+		public static ToDemoHubButton Instance
+	    {
+	        get
+	        {
+	            if (instance == null)
+	            {
+                    #if UNITY_6000_0_OR_NEWER
+                    instance = FindFirstObjectByType<ToDemoHubButton>();
+                    #else
+					instance = FindObjectOfType(typeof (ToDemoHubButton)) as ToDemoHubButton;
+                    #endif
+                }
+
+	            return instance;
+	        }
+	    }
+
+	    public void Awake()
+	    {
+	        if (Instance != null && Instance != this)
+	        {
+	            Destroy(gameObject);
+	        }
+	    }
+
+	    // Use this for initialization
+	    public void Start()
+	    {
+	        DontDestroyOnLoad(gameObject);
+
+			_canvasGroup = GetComponent<CanvasGroup>();
+
+
+	    }
+			
+
+
+
+	    public void Update()
+	    {
+	        bool sceneZeroLoaded = false;
+
+			#if UNITY_5 && !UNITY_5_0 && !UNITY_5_1 && !UNITY_5_2 || UNITY_5_3_OR_NEWER
+	        sceneZeroLoaded = SceneManager.GetActiveScene().buildIndex == 0;
+	        #else
+	        sceneZeroLoaded = Application.loadedLevel == 0;
+	        #endif
+
+			if (sceneZeroLoaded && _canvasGroup.alpha!= 0f)
+			{
+				_canvasGroup.alpha = 0f;
+				_canvasGroup.interactable = false;
+			}
+
+			if (!sceneZeroLoaded && _canvasGroup.alpha!= 1f)
+			{
+				_canvasGroup.alpha = 1f;
+				_canvasGroup.interactable = true;
+			}
+	       
+	    }
+
+		public void BackToHub()
+		{
+			PhotonNetwork.Disconnect();
+			SceneManager.LoadScene(0);
+		}
+
+	}
+}