/Main/src/DynamicDataDisplay/Charts/Shapes/ViewportShape.cs

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows;

using System.Windows.Shapes;

using System.Windows.Media;



namespace Microsoft.Research.DynamicDataDisplay.Charts

{

	/// <summary>

	/// Represents a base class for simple shapes with viewport-bound coordinates.

	/// </summary>

	public abstract class ViewportShape : Shape, IPlotterElement

	{

		static ViewportShape()

		{

			Type type = typeof(ViewportShape);

			Shape.StrokeProperty.AddOwner(type, new FrameworkPropertyMetadata(Brushes.Blue));

			Shape.StrokeThicknessProperty.AddOwner(type, new FrameworkPropertyMetadata(2.0));

		}



		/// <summary>

		/// Initializes a new instance of the <see cref="ViewportShape"/> class.

		/// </summary>

		protected ViewportShape() { }



		protected void UpdateUIRepresentation()

		{

			if (Plotter == null)

				return;



			UpdateUIRepresentationCore();

		}

		protected virtual void UpdateUIRepresentationCore() { }



		#region IPlotterElement Members



		private Plotter2D plotter;

		void IPlotterElement.OnPlotterAttached(Plotter plotter)

		{

			plotter.CentralGrid.Children.Add(this);



			Plotter2D plotter2d = (Plotter2D)plotter;

			this.plotter = plotter2d;

			plotter2d.Viewport.PropertyChanged += Viewport_PropertyChanged;



			UpdateUIRepresentation();

		}



		private void Viewport_PropertyChanged(object sender, ExtendedPropertyChangedEventArgs e)

		{

			OnViewportPropertyChanged(e);

		}



		protected virtual void OnViewportPropertyChanged(ExtendedPropertyChangedEventArgs e)

		{

			UpdateUIRepresentation();

		}



		void IPlotterElement.OnPlotterDetaching(Plotter plotter)

		{

			Plotter2D plotter2d = (Plotter2D)plotter;

			plotter2d.Viewport.PropertyChanged -= Viewport_PropertyChanged;

			plotter.CentralGrid.Children.Remove(this);



			this.plotter = null;

		}



		public Plotter2D Plotter

		{

			get { return plotter; }

		}



		Plotter IPlotterElement.Plotter

		{

			get { return plotter; }

		}



		#endregion

	}

}