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Assets/SampleScenes/Menu/Scripts/PauseMenu.cs

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+using System;
+using UnityEngine;
+using UnityEngine.UI;
+
+public class PauseMenu : MonoBehaviour
+{
+    private Toggle m_MenuToggle;
+	private float m_TimeScaleRef = 1f;
+    private float m_VolumeRef = 1f;
+    private bool m_Paused;
+
+
+    void Awake()
+    {
+        m_MenuToggle = GetComponent <Toggle> ();
+	}
+
+
+    private void MenuOn ()
+    {
+        m_TimeScaleRef = Time.timeScale;
+        Time.timeScale = 0f;
+
+        m_VolumeRef = AudioListener.volume;
+        AudioListener.volume = 0f;
+
+        m_Paused = true;
+    }
+
+
+    public void MenuOff ()
+    {
+        Time.timeScale = m_TimeScaleRef;
+        AudioListener.volume = m_VolumeRef;
+        m_Paused = false;
+    }
+
+
+    public void OnMenuStatusChange ()
+    {
+        if (m_MenuToggle.isOn && !m_Paused)
+        {
+            MenuOn();
+        }
+        else if (!m_MenuToggle.isOn && m_Paused)
+        {
+            MenuOff();
+        }
+    }
+
+
+#if !MOBILE_INPUT
+	void Update()
+	{
+		if(Input.GetKeyUp(KeyCode.Escape))
+		{
+		    m_MenuToggle.isOn = !m_MenuToggle.isOn;
+            Cursor.visible = m_MenuToggle.isOn;//force the cursor visible if anythign had hidden it
+		}
+	}
+#endif
+
+}