bind window

Assets/UIWidgets/Tests/CanvasAndLayers.cs

         }
 
         private void OnEnable() {
-            this.paintingBinding = new PaintingBinding();
+            this.paintingBinding = new PaintingBinding(null);
             paintingBinding.initInstances();
         }
 

Assets/UIWidgets/painting/binding.cs

+using UIWidgets.ui;
+
+
+        public PaintingBinding(Window window) {
+            this._window = window;
+        }
+        
+        public readonly Window _window;
 
         public static PaintingBinding instance {
             get { return _instance; }

Assets/UIWidgets/ui/painting/canvas_impl.cs

                 if (drawCmd is DrawPloygon4) {
                     var drawPloygon4 = (DrawPloygon4) drawCmd;
                     this.drawPloygon4(drawPloygon4.points, drawPloygon4.paint);
-                } else if (drawCmd is DrawRect) {
+                }
+                else if (drawCmd is DrawRect) {
-                } else if (drawCmd is DrawRectShadow) {
+                }
+                else if (drawCmd is DrawRectShadow) {
-                } else if (drawCmd is DrawPicture) {
+                }
+                else if (drawCmd is DrawPicture) {
-                } else if (drawCmd is DrawConcat) {
+                }
+                else if (drawCmd is DrawConcat) {
-                } else if (drawCmd is DrawSave) {
+                }
+                else if (drawCmd is DrawSave) {
-                } else if (drawCmd is DrawSaveLayer) {
+                }
+                else if (drawCmd is DrawSaveLayer) {
-                } else if (drawCmd is DrawRestore) {
+                }
+                else if (drawCmd is DrawRestore) {
                     saveCount--;
                     if (saveCount < 0) {
                         throw new Exception("unmatched save/restore in picture");
-                } else if (drawCmd is DrawClipRect) {
+                }
+                else if (drawCmd is DrawClipRect) {
-                } else if (drawCmd is DrawClipRRect) {
+                }
+                else if (drawCmd is DrawClipRRect) {
-                } else {
+                }
+                else {
                     throw new Exception("unknown drawCmd: " + drawCmd);
                 }
             }
         }
 
         public void drawImageRect(Rect src, Rect dst, Paint paint, Image image) {
-            if (image != null)
-            {
+            if (image != null) {
                 Texture2D _texture = new Texture2D(0, 0);
                 _texture.LoadImage(image.rawData);
                 Graphics.DrawTexture(dst.toRect(), _texture);
                         (float) rect.width,
                         (float) rect.height));
                     mat.SetVector("UIWidgets_GUIClipRectRadius", new Vector4(0, 0, 0, 0));
-                } else {
+                }
+                else {
                     var rrect = this._clipRec.rrect;
                     var rect = rrect.outerRect;
                     mat.SetVector("UIWidgets_GUIClipRect", new Vector4(
                             (float) rrect.brRadius,
                             (float) rrect.blRadius));
                 }
-            } else {
+            }
+            else {
                 mat.SetMatrix("UIWidgets_GUIClipMatrix", Matrix4x4.identity);
                 var rect = Rect.largest;
                 mat.SetVector("UIWidgets_GUIClipRect", new Vector4(