fix pointer position in widget canvas, position should be physical.

Runtime/engine/WidgetCanvas.cs

         }
 
         protected override double queryDevicePixelRatio() {
-            return this._widgetCanvas.canvas.scaleFactor;
+            return this._widgetCanvas.pixelRatio;
         }
 
         protected override Vector2 queryWindowSize() {
             this._lastMouseMove = Input.mousePosition;
         }
 
+        public double pixelRatio {
+            get { return this.canvas.scaleFactor; }
+        }
+        
         protected virtual Dictionary<string, WidgetBuilder> routes => null;
 
         protected virtual string initialRoute => null;
             Vector2 localPoint;
             RectTransformUtility.ScreenPointToLocalPointInRectangle(this.rectTransform, eventData.position,
                 eventData.enterEventCamera, out localPoint);
-            localPoint.x = localPoint.x - this.rectTransform.rect.min.x;
-            localPoint.y = this.rectTransform.rect.max.y - localPoint.y;
+            var pixelRatio = this.pixelRatio;
+            localPoint.x = (float)((localPoint.x - this.rectTransform.rect.min.x) * pixelRatio);
+            localPoint.y = (float)((this.rectTransform.rect.max.y - localPoint.y) * pixelRatio);
+           // Debug.Log();
             return localPoint;
         }
 
 
             RectTransformUtility.ScreenPointToLocalPointInRectangle(this.rectTransform, position,
                 eventCamera, out localPoint);
-            localPoint.x = localPoint.x - this.rectTransform.rect.min.x;
-            localPoint.y = this.rectTransform.rect.max.y - localPoint.y;
+            localPoint.x = (float)((localPoint.x - this.rectTransform.rect.min.x) * this.pixelRatio);
+            localPoint.y = (float)((this.rectTransform.rect.max.y - localPoint.y) * this.pixelRatio);
             return localPoint;
         }