work on update events

Source/Basic Shapes/SvgRectangle.cs

@@ -50,6 +50,7 @@ namespace Svg
             set
             {
                 _x = value;
+                OnAttributeChanged(new AttributeEventArgs{ Attribute = "x", Value = value });
                 IsPathDirty = true;
             }
         }
@@ -64,6 +65,7 @@ namespace Svg
             set
             {
                 _y = value;
+                OnAttributeChanged(new AttributeEventArgs{ Attribute = "y", Value = value });
                 IsPathDirty = true;
             }
         }
@@ -78,6 +80,7 @@ namespace Svg
             set
             {
                 _width = value;
+                OnAttributeChanged(new AttributeEventArgs{ Attribute = "width", Value = value });
                 IsPathDirty = true;
             }
         }
@@ -92,6 +95,7 @@ namespace Svg
             set
             {
                 _height = value;
+                OnAttributeChanged(new AttributeEventArgs{ Attribute = "height", Value = value });
                 IsPathDirty = true;
             }
         }

Source/Paths/SvgPath.cs

@@ -94,6 +94,7 @@ namespace Svg
         internal void OnPathUpdated()
         {
             this.IsPathDirty = true;
+            OnAttributeChanged(new AttributeEventArgs{ Attribute = "d", Value = this.PathData });
         }
 
         /// <summary>

Source/SvgElement.cs

@@ -30,6 +30,7 @@ namespace Svg
             public SvgAttributeAttribute Attribute;
         }
 
+        //reflection cache
         protected IEnumerable<PropertyAttributeTuple> _svgPropertyAttributes;
         protected IEnumerable<EventAttributeTuple> _svgEventAttributes;
 
@@ -68,10 +69,28 @@ namespace Svg
         /// <summary>
         /// Gets or sets the content of the element.
         /// </summary>
+        private string _content;
         public virtual string Content
         {
-            get;
-            set;
+            get
+            {
+            	return _content;
+            }
+            set
+            {
+            	if(_content != null)
+            	{
+            		var oldVal = _content;
+            		_content = value;
+            		if(_content != oldVal)
+            			OnAttributeChanged(new AttributeEventArgs{ Attribute = "", Value = value });
+            	}
+            	else
+            	{
+            		_content = value;
+            		OnAttributeChanged(new AttributeEventArgs{ Attribute = "", Value = value });
+            	}
+            }
         }
 
         /// <summary>
@@ -220,8 +239,15 @@ namespace Svg
         [SvgAttribute("transform")]
         public SvgTransformCollection Transforms
         {
-            get { return (this.Attributes.GetAttribute<SvgTransformCollection>("Transforms") ?? new SvgTransformCollection()); }
-            set { this.Attributes["Transforms"] = value; }
+            get { return (this.Attributes.GetAttribute<SvgTransformCollection>("Transforms")); }
+            set 
+            { 
+            	var old = this.Transforms;
+            	if(old != null)
+            		old.TransformChanged -= Attributes_AttributeChanged;
+            	value.TransformChanged += Attributes_AttributeChanged;
+            	this.Attributes["Transforms"] = value; 
+            }
         }
 
         /// <summary>
@@ -302,6 +328,8 @@ namespace Svg
             this._elementName = string.Empty;
             this._customAttributes = new SvgCustomAttributeCollection(this);
             
+            Transforms = new SvgTransformCollection();
+            
             //subscribe to attribute events
             Attributes.AttributeChanged += Attributes_AttributeChanged;
             CustomAttributes.AttributeChanged += Attributes_AttributeChanged;

Source/Text/SvgText.cs

@@ -83,7 +83,12 @@ namespace Svg
         public virtual SvgUnit X
         {
             get { return this._x; }
-            set { this._x = value; this.IsPathDirty = true; }
+            set 
+            { 
+            	this._x = value; 
+            	this.IsPathDirty = true;
+            	OnAttributeChanged(new AttributeEventArgs{ Attribute = "x", Value = value });
+            }
         }
 
         /// <summary>
@@ -94,7 +99,12 @@ namespace Svg
         public virtual SvgUnit Y
         {
             get { return this._y; }
-            set { this._y = value; this.IsPathDirty = true; }
+            set 
+            { 
+            	this._y = value; 
+            	this.IsPathDirty = true; 
+            	OnAttributeChanged(new AttributeEventArgs{ Attribute = "y", Value = value });
+            }
         }
 
         /// <summary>

Source/Transforms/SvgScale.cs

@@ -46,7 +46,6 @@ namespace Svg.Transforms
             this.scaleFactorY = y;
         }
 
-
 		public override object Clone()
 		{
 			return new SvgScale(this.X, this.Y);

Source/Transforms/SvgTransformCollection.cs

@@ -10,6 +10,31 @@ namespace Svg.Transforms
     [TypeConverter(typeof(SvgTransformConverter))]
     public class SvgTransformCollection : List<SvgTransform>
     {
+	
+    	public new void Add(SvgTransform item)
+    	{
+    		base.Add(item);
+    		OnTransformChanged();
+    	}
+    	
+    	public new void AddRange(IEnumerable<SvgTransform> collection)
+    	{
+    		base.AddRange(collection);
+    		OnTransformChanged();
+    	}
+    	
+    	public new void Remove(SvgTransform item)
+    	{
+    		base.Remove(item);
+    		OnTransformChanged();
+    	}
+    	
+    	public new void RemoveAt(int index)
+    	{
+    		base.RemoveAt(index);
+    		OnTransformChanged();
+    	}
+    	
     	/// <summary>
     	/// Multiplies all matrices
     	/// </summary>
@@ -32,13 +57,38 @@ namespace Svg.Transforms
             return transformMatrix;
     	}
 
-
 		public override bool Equals(object obj)
 		{
-			if (this.Count == 0 && this.Count == this.Count) //default will be an empty list 
+			if (this.Count == 0 && this.Count == base.Count) //default will be an empty list 
 				return true;
 			return base.Equals(obj);
 		}
 		
+		public new SvgTransform this[int i]
+        {
+			get { return base[i]; }
+			set
+			{
+				var oldVal = base[i];
+				base[i] = value;
+				if(oldVal != value)
+					OnTransformChanged();
+			}
+		}
+		
+		/// <summary>
+        /// Fired when an SvgTransform has changed
+        /// </summary>
+        public event EventHandler<AttributeEventArgs> TransformChanged;
+        
+        protected void OnTransformChanged()
+        {
+        	var handler = TransformChanged;
+        	if(handler != null)
+        	{
+        		handler(this, new AttributeEventArgs { Attribute = "transform", Value = this });
+        	}
+        }
+    		
     }
 }