using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows.Controls;

using System.Windows;

using Microsoft.Research.DynamicDataDisplay.Common;



namespace Microsoft.Research.DynamicDataDisplay.Charts

{

	public abstract class ContentGraph : ContentControl, IPlotterElement

	{

		static ContentGraph()

		{

			EventManager.RegisterClassHandler(typeof(ContentGraph), Plotter.PlotterChangedEvent, new PlotterChangedEventHandler(OnPlotterChanged));

		}



		private static void OnPlotterChanged(object sender, PlotterChangedEventArgs e)

		{

			ContentGraph owner = (ContentGraph)sender;

			owner.OnPlotterChanged(e);

		}



		private void OnPlotterChanged(PlotterChangedEventArgs e)

		{

			if (plotter == null && e.CurrentPlotter != null)

			{

				plotter = (Plotter2D)e.CurrentPlotter;

				plotter.Viewport.PropertyChanged += Viewport_PropertyChanged;

				OnPlotterAttached();

			}

			if (plotter != null && e.PreviousPlotter != null)

			{

				OnPlotterDetaching();

				plotter.Viewport.PropertyChanged -= Viewport_PropertyChanged;

				plotter = null;

			}

		}



		#region IPlotterElement Members



		private void Viewport_PropertyChanged(object sender, ExtendedPropertyChangedEventArgs e)

		{

			OnViewportPropertyChanged(e);

		}



		protected virtual void OnViewportPropertyChanged(ExtendedPropertyChangedEventArgs e) { }



		protected virtual Panel HostPanel

		{

			get { return plotter.CentralGrid; }

		}



		void IPlotterElement.OnPlotterAttached(Plotter plotter)

		{

			this.plotter = (Plotter2D)plotter;

			HostPanel.Children.Add(this);

			this.plotter.Viewport.PropertyChanged += Viewport_PropertyChanged;



			OnPlotterAttached();

		}



		protected virtual void OnPlotterAttached() { }



		void IPlotterElement.OnPlotterDetaching(Plotter plotter)

		{

			OnPlotterDetaching();



			this.plotter.Viewport.PropertyChanged -= Viewport_PropertyChanged;

			HostPanel.Children.Remove(this);

			this.plotter = null;

		}



		protected virtual void OnPlotterDetaching() { }



		private Plotter2D plotter;

		protected Plotter2D Plotter2D

		{

			get { return plotter; }

		}



		Plotter IPlotterElement.Plotter

		{

			get { return plotter; }

		}



		#endregion

	}

}