SvgElement.cs

        	if (caller != null && !string.IsNullOrEmpty(this.ID))
        	{
        		var rpcID = this.ID + "/";

        		caller.UnregisterAction(rpcID + "onclick");
        		caller.UnregisterAction(rpcID + "onmousedown");
        		caller.UnregisterAction(rpcID + "onmouseup");
        		caller.UnregisterAction(rpcID + "onmousemove");
        		caller.UnregisterAction(rpcID + "onmousescroll");
        		caller.UnregisterAction(rpcID + "onmouseover");
        		caller.UnregisterAction(rpcID + "onmouseout");
        	}
        }
#endif

        [SvgAttribute("onclick")]
        public event EventHandler<MouseArg> Click;

        [SvgAttribute("onmousedown")]
        public event EventHandler<MouseArg> MouseDown;

        [SvgAttribute("onmouseup")]
        public event EventHandler<MouseArg> MouseUp;
        
        [SvgAttribute("onmousemove")]
        public event EventHandler<MouseArg> MouseMove;

        [SvgAttribute("onmousescroll")]
        public event EventHandler<MouseScrollArg> MouseScroll;
        
        [SvgAttribute("onmouseover")]
        public event EventHandler<MouseArg> MouseOver;

        [SvgAttribute("onmouseout")]
        public event EventHandler<MouseArg> MouseOut;
        
#if Net4
        protected Action<float, float, int, int, bool, bool, bool, string> CreateMouseEventAction(Action<object, MouseArg> eventRaiser)
        {
        	return (x, y, button, clickCount, altKey, shiftKey, ctrlKey, sessionID) =>
        		eventRaiser(this, new MouseArg { x = x, y = y, Button = button, ClickCount = clickCount, AltKey = altKey, ShiftKey = shiftKey, CtrlKey = ctrlKey, SessionID = sessionID });
        }
#endif

        //click
        protected void RaiseMouseClick(object sender, MouseArg e)
        {
        	var handler = Click;
        	if (handler != null)
        	{
        		handler(sender, e);
            }
        }

        //down
        protected void RaiseMouseDown(object sender, MouseArg e)
        {
        	var handler = MouseDown;
            if (handler != null)
            {
                handler(sender, e);
            }
        }

        //up
        protected void RaiseMouseUp(object sender, MouseArg e)
        {
        	var handler = MouseUp;
            if (handler != null)
            {
                handler(sender, e);
            }
        }

        protected void RaiseMouseMove(object sender, MouseArg e)
        {
        	var handler = MouseMove;
            if (handler != null)
            {
                handler(sender, e);
            }
        }
        
        //over
        protected void RaiseMouseOver(object sender, MouseArg args)
        {
        	var handler = MouseOver;
            if (handler != null)
            {
                handler(sender, args);
            }
        }

        //out
        protected void RaiseMouseOut(object sender, MouseArg args)
        {
        	var handler = MouseOut;
            if (handler != null)
            {
                handler(sender, args);
            }
        }
        
        
        //scroll
        protected void OnMouseScroll(int scroll, bool ctrlKey, bool shiftKey, bool altKey, string sessionID)
        {
        	RaiseMouseScroll(this, new MouseScrollArg { Scroll = scroll, AltKey = altKey, ShiftKey = shiftKey, CtrlKey = ctrlKey, SessionID = sessionID});
        }
        
        protected void RaiseMouseScroll(object sender, MouseScrollArg e)
        {
        	var handler = MouseScroll;
            if (handler != null)
            {
                handler(sender, e);
            }
        }
        
        #endregion graphical EVENTS
    }
    
    public class SVGArg : EventArgs
    {
    	public string SessionID;
    }
    	
    
    /// <summary>
    /// Describes the Attribute which was set
    /// </summary>
    public class AttributeEventArgs : SVGArg
    {
    	public string Attribute;
    	public object Value;
    }
    
    /// <summary>
    /// Content of this whas was set
    /// </summary>
    public class ContentEventArgs : SVGArg
    {
    	public string Content;
    }
    
    /// <summary>
    /// Describes the Attribute which was set
    /// </summary>
    public class ChildAddedEventArgs : SVGArg
    {
    	public SvgElement NewChild;
    	public SvgElement BeforeSibling;
    }

#if Net4
    //deriving class registers event actions and calls the actions if the event occurs
    public interface ISvgEventCaller
    {
        void RegisterAction(string rpcID, Action action);
        void RegisterAction<T1>(string rpcID, Action<T1> action);
        void RegisterAction<T1, T2>(string rpcID, Action<T1, T2> action);
        void RegisterAction<T1, T2, T3>(string rpcID, Action<T1, T2, T3> action);
        void RegisterAction<T1, T2, T3, T4>(string rpcID, Action<T1, T2, T3, T4> action);
        void RegisterAction<T1, T2, T3, T4, T5>(string rpcID, Action<T1, T2, T3, T4, T5> action);
        void RegisterAction<T1, T2, T3, T4, T5, T6>(string rpcID, Action<T1, T2, T3, T4, T5, T6> action);
        void RegisterAction<T1, T2, T3, T4, T5, T6, T7>(string rpcID, Action<T1, T2, T3, T4, T5, T6, T7> action);
        void RegisterAction<T1, T2, T3, T4, T5, T6, T7, T8>(string rpcID, Action<T1, T2, T3, T4, T5, T6, T7, T8> action);
        void UnregisterAction(string rpcID);
    }
#endif

    /// <summary>
    /// Represents the state of the mouse at the moment the event occured.
    /// </summary>
    public class MouseArg : SVGArg
    {
        public float x;
        public float y;

        /// <summary>
        /// 1 = left, 2 = middle, 3 = right
        /// </summary>
        public int Button;
        
        /// <summary>
        /// Amount of mouse clicks, e.g. 2 for double click
        /// </summary>
        public int ClickCount = -1;
        
        /// <summary>
        /// Alt modifier key pressed
        /// </summary>
        public bool AltKey;
        
        /// <summary>
        /// Shift modifier key pressed
        /// </summary>
        public bool ShiftKey;
        
        /// <summary>
        /// Control modifier key pressed
        /// </summary>
        public bool CtrlKey;
    }
    
    /// <summary>
    /// Represents a string argument
    /// </summary>
    public class StringArg : SVGArg
    {
        public string s;
    }
    
    public class MouseScrollArg : SVGArg
    {
    	public int Scroll;
    	
    	/// <summary>
        /// Alt modifier key pressed
        /// </summary>
        public bool AltKey;
        
        /// <summary>
        /// Shift modifier key pressed
        /// </summary>
        public bool ShiftKey;
        
        /// <summary>
        /// Control modifier key pressed
        /// </summary>
        public bool CtrlKey;
    }

    public interface ISvgNode
    {
        string Content { get; }
        
        /// <summary>
        /// Create a deep copy of this <see cref="ISvgNode"/>.
        /// </summary>
        /// <returns>A deep copy of this <see cref="ISvgNode"/></returns>
        ISvgNode DeepCopy();
    }

    /// <summary>This interface mostly indicates that a node is not to be drawn when rendering the SVG.</summary>
    public interface ISvgDescriptiveElement {
    }

    internal interface ISvgElement
    {
		SvgElement Parent {get;}
		SvgElementCollection Children { get; }
        IList<ISvgNode> Nodes { get; }

        void Render(ISvgRenderer renderer);
    }
}