context: //============================================================================
  //ZedGraph Class Library - A Flexible Line Graph/Bar Graph Library in C#
  //Copyright ?2007  John Champion and JCarpenter
  //
  //This library is free software; you can redistribute it and/or
  //modify it under the terms of the GNU Lesser General Public
  //License as published by the Free Software Foundation; either
  //version 2.1 of the License, or (at your option) any later version.
  //
  //This library is distributed in the hope that it will be useful,
  //but WITHOUT ANY WARRANTY; without even the implied warranty of
  //MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  //Lesser General Public License for more details.
  //
  //You should have received a copy of the GNU Lesser General Public
  //License along with this library; if not, write to the Free Software
  //Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  //=============================================================================
  
  using System;
  using System.Drawing;
  using System.Collections;
  
  namespace ZedGraph
  {
  	/// <summary>
  	/// </summary>
  	/// <remarks>
  	/// </remarks>
  	/// 
  	/// <author> John Champion and JCarpenter </author>
  	/// <version> $Revision: 3.5 $ $Date: 2007-03-11 02:08:16 $ </version>
  	public class Selection : CurveList
  	{
  		// Revision: JCarpenter 10/06
  		/// <summary>
  		/// Subscribe to this event to receive notice 
  		/// that the list of selected CurveItems has changed
  		/// </summary>
  		public event EventHandler SelectionChangedEvent;
  
  	#region static properties
  
  		/// <summary>
  		/// The <see cref="Border" /> type to be used for drawing "selected"
  		/// <see cref="PieItem" />, <see cref="BarItem" />, <see cref="HiLowBarItem" />,
  		/// <see cref="OHLCBarItem" />, and <see cref="JapaneseCandleStickItem" /> item types.
  		/// </summary>
  		public static Border Border = new Border( Color.Gray, 1.0f );
  		/// <summary>
  		/// The <see cref="Fill" /> type to be used for drawing "selected"
  		/// <see cref="PieItem" />, <see cref="BarItem" />, <see cref="HiLowBarItem" />,
  		/// and <see cref="JapaneseCandleStickItem" /> item types.
  		/// </summary>
  		public static Fill Fill = new Fill( Color.Gray );
  		/// <summary>
  		/// The <see cref="Line" /> type to be used for drawing "selected"
  		/// <see cref="LineItem" /> and <see cref="StickItem" /> types
  		/// </summary>
  		public static Line Line = new Line( Color.Gray );
  		//			public static ErrorBar ErrorBar = new ErrorBar( Color.Gray );
  		/// <summary>
  		/// The <see cref="Symbol" /> type to be used for drawing "selected"
  		/// <see cref="LineItem" /> and <see cref="ErrorBarItem" /> types.
  		/// </summary>
  		public static Symbol Symbol = new Symbol( SymbolType.Circle, Color.Gray );
  
  		//public static Color SelectedSymbolColor = Color.Gray;
  
  	#endregion
  
  	#region Methods
  
  		/// <summary>
  		/// Place a <see cref="CurveItem" /> in the selection list, removing all other
  		/// items.
  		/// </summary>
  		/// <param name="master">The <see cref="MasterPane" /> that is the "owner"
  		/// of the <see cref="CurveItem" />'s.</param>
  		/// <param name="ci">The <see cref="CurveItem" /> to be added to the list.</param>
  		public void Select( MasterPane master, CurveItem ci )
  		{
  			//Clear the selection, but don't send the event,
  			//the event will be sent in "AddToSelection" by calling "UpdateSelection"
  			ClearSelection( master, false );
  
  			AddToSelection( master, ci );
  		}
  
  		/// <summary>
  		/// Place a list of <see cref="CurveItem" />'s in the selection list, removing all other
  		/// items.
  		/// </summary>
  		/// <param name="master">The <see cref="MasterPane" /> that is the "owner"
  		/// of the <see cref="CurveItem" />'s.</param>
  		/// <param name="ciList">The list of <see cref="CurveItem" /> to be added to the list.</param>
  		public void Select( MasterPane master, CurveList ciList )
  		{
  			//Clear the selection, but don't send the event,
  			//the event will be sent in "AddToSelection" by calling "UpdateSelection"
  			ClearSelection( master, false );
  
  			AddToSelection( master, ciList );
  		}
  
  		/// <summary>
  		/// Add a <see cref="CurveItem" /> to the selection list.
  		/// </summary>
  		/// <param name="master">The <see cref="MasterPane" /> that is the "owner"
  		/// of the <see cref="CurveItem" />'s.</param>
  		/// <param name="ci">The <see cref="CurveItem" /> to be added to the list.</param>
  		public void AddToSelection( MasterPane master, CurveItem ci )
  		{
  			if ( this.Contains( ci ) == false )
  				Add( ci );
  
  			UpdateSelection( master );
  		}
  
  		/// <summary>
  		/// Add a list of <see cref="CurveItem" />'s to the selection list.
  		/// </summary>
  		/// <param name="master">The <see cref="MasterPane" /> that is the "owner"
  		/// of the <see cref="CurveItem" />'s.</param>
  		/// <param name="ciList">The list of <see cref="CurveItem" />'s to be added to the list.</param>
  		public void AddToSelection( MasterPane master, CurveList ciList )
  		{
  			foreach ( CurveItem ci in ciList )
  			{
  				if ( this.Contains( ci ) == false )
  					this.Add( ci );
  			}
  
  			UpdateSelection( master );
  		}
  
  #if ( DOTNET1 )
  
  		// Define a "Contains" method so that this class works with .Net 1.1 or 2.0
  		internal bool Contains( CurveItem item )
  		{
  			foreach ( CurveItem ci in this )
  				if ( item == ci )
  					return true;
  
  			return false;
  		}
  #endif
  
  		/// <summary>
  		/// Remove the specified <see cref="CurveItem" /> from the selection list.
  		/// </summary>
  		/// <param name="master">The <see cref="MasterPane" /> that is the "owner"
  		/// of the <see cref="CurveItem" />'s.</param>
  		/// <param name="ci">The <see cref="CurveItem" /> to be removed from the list.</param>
  		public void RemoveFromSelection( MasterPane master, CurveItem ci )
  		{
  			if ( this.Contains( ci ) )
  				this.Remove( ci );
  
  			UpdateSelection( master );
  
  		}
  
  		/// <summary>
  		/// Clear the selection list and trigger a <see cref="SelectionChangedEvent" />.
  		/// </summary>
  		/// <param name="master">The <see cref="MasterPane" /> that "owns" the selection list.</param>
  		public void ClearSelection( MasterPane master )
  		{
  			ClearSelection( master, true );
  		}
  
  		/// <summary>
  		/// Clear the selection list and optionally trigger a <see cref="SelectionChangedEvent" />.
  		/// </summary>
  		/// <param name="master">The <see cref="MasterPane" /> that "owns" the selection list.</param>
  		/// <param name="sendEvent">true to trigger a <see cref="SelectionChangedEvent" />,
  		/// false otherwise.</param>
  		public void ClearSelection( MasterPane master, bool sendEvent )
  		{
  			this.Clear();
  
  			foreach ( GraphPane pane in master.PaneList )
  			{
  				foreach ( CurveItem ci in pane.CurveList )
  				{
  					ci.IsSelected = false;
  				}
  			}
  
  			if ( sendEvent )
  			{
  				if ( SelectionChangedEvent != null )
  					SelectionChangedEvent( this, EventArgs.Empty );
  			}
  		}
  
  		/// <summary>
  		/// Mark the <see cref="CurveItem" />'s that are included in the selection list
  		/// by setting the <see cref="CurveItem.IsSelected" /> property to true.
  		/// </summary>
  		/// <param name="master">The <see cref="MasterPane" /> that "owns" the selection list.</param>
  		public void UpdateSelection( MasterPane master )
  		{
  			if ( Count <= 0 )
  			{
  				ClearSelection( master );
  				return;
  			}
  
  			foreach ( GraphPane pane in master.PaneList )
  			{
  				foreach ( CurveItem ci in pane.CurveList )
  				{
  					//Make it Inactive
  					ci.IsSelected = false;
  				}
  
  			}
  			foreach ( CurveItem ci in  this )
  			{
  				//Make Active
  				ci.IsSelected = true;
  
  				//If it is a line / scatterplot, the selected Curve may be occluded by an unselected Curve
  				//So, move it to the top of the ZOrder by removing it, and re-adding it.
  
  				//Why only do this for Lines? ...Bar and Pie Curves are less likely to overlap, 
  				//and adding and removing Pie elements changes thier display order
  				if ( ci.IsLine )
  				{
  					//I don't know how to get a Pane, from a CurveItem, so I can only do it 
  					//if there is one and only one Pane, based on the assumption that the 
  					//Curve's Pane is MasterPane[0]
  
  					//If there is only one Pane
  					if ( master.PaneList.Count == 1 )
  					{
  						GraphPane pane = master.PaneList[0];
  						pane.CurveList.Remove( ci );
  						pane.CurveList.Insert( 0, ci );
  					}
  
  				}
  			}
  
  			//Send Selection Changed Event
  			if ( SelectionChangedEvent != null )
  
gt: 				SelectionChangedEvent( this, EventArgs.Empty);