ellipse also fires changed events for its position and radius

Source/Basic Shapes/SvgEllipse.cs

@@ -25,9 +25,13 @@ namespace Svg
         {
             get { return this._centerX; }
             set
+            {
+            	if(_centerX != value)
             	{
             		this._centerX = value;
             		this.IsPathDirty = true;
+            		OnAttributeChanged(new AttributeEventArgs{ Attribute = "cx", Value = value });
+            	}
             }
         }
 
@@ -36,9 +40,13 @@ namespace Svg
         {
         	get { return this._centerY; }
         	set
+        	{
+        		if(_centerY != value)
         		{
         			this._centerY = value;
         			this.IsPathDirty = true;
+        			OnAttributeChanged(new AttributeEventArgs{ Attribute = "cy", Value = value });
+        		}
         	}
         }
 
@@ -46,14 +54,30 @@ namespace Svg
         public virtual SvgUnit RadiusX
         {
         	get { return this._radiusX; }
-            set { this._radiusX = value; this.IsPathDirty = true; }
+        	set
+        	{
+        		if(_radiusX != value)
+        		{
+        			this._radiusX = value;
+        			this.IsPathDirty = true;
+        			OnAttributeChanged(new AttributeEventArgs{ Attribute = "rx", Value = value });
+        		}
+        	}
         }
 
         [SvgAttribute("ry")]
         public virtual SvgUnit RadiusY
         {
         	get { return this._radiusY; }
-            set { this._radiusY = value; this.IsPathDirty = true; }
+        	set
+        	{
+        		if(_radiusY != value)
+        		{
+        			this._radiusY = value;
+        			this.IsPathDirty = true;
+        			OnAttributeChanged(new AttributeEventArgs{ Attribute = "ry", Value = value });
+        		}
+        	}
         }
 
         /// <summary>