static void ShowWindow()
 {
     if (SingleWindow == null)
     {
         SingleWindow          = (BanDepthLayerToolForNGUI)ScriptableObject.CreateInstance(typeof(BanDepthLayerToolForNGUI));
         SingleWindow.title    = "BanDepthLayerToolForNGUI";
         SingleWindow.minSize  = new Vector2(300, 420);
         SingleWindow.maxSize  = new Vector2(300, 420);
         SingleWindow.position = new Rect(200, 200, 300, 420);
     }
     SingleWindow.ReadUISprite();
     SingleWindow.ShowUtility();
     SingleWindow.Focus();
 }
 void OnDisable()
 {
     SingleWindow = null;
 }