using System;

using System.Windows;

using System.Windows.Media;



namespace Microsoft.Research.DynamicDataDisplay.PointMarkers

{

    /// <summary>Invokes specified delegate for rendering custon marker

    /// at every point of graph</summary>

	public sealed class DelegatePointMarker : PointMarker {

		public MarkerRenderHandler RenderCallback { get; set; }



		public DelegatePointMarker() { }

		public DelegatePointMarker(MarkerRenderHandler renderCallback) {

			if (renderCallback == null)

				throw new ArgumentNullException("renderCallback");

	

			RenderCallback = renderCallback;

		}



		public override void Render(DrawingContext dc, Point screenPoint) {

			RenderCallback(dc, screenPoint);

		}

	}

}