A flexible charting library for .NET

//============================================================================
//ZedGraph Class Library - A Flexible Charting Library for .Net
//Copyright (C) 2005 John Champion and Jerry Vos
//
//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;

using ZedGraph;

namespace ZedGraph.Demo
{
	/// <summary>
	/// Summary description for SimpleDemo.
	/// </summary>
	public class PieSampleDemo : DemoBase
	{

		public PieSampleDemo() : base( "Code Project Pie Sample",
									"Pie Sample", DemoType.Pie, DemoType.Tutorial )
		{
			GraphPane myPane = base.GraphPane;

			// Set the GraphPane title
			myPane.Title.Text = "2004 ZedGraph Sales by Region\n($M)";
			myPane.Title.FontSpec.IsItalic = true;
			myPane.Title.FontSpec.Size = 24f;
			myPane.Title.FontSpec.Family = "Times New Roman";

			// Fill the pane background with a color gradient
			myPane.Fill = new Fill( Color.White, Color.Goldenrod, 45.0f );
			// No fill for the axis background
			myPane.Chart.Fill.Type = FillType.None;

			// Set the legend to an arbitrary location
			myPane.Legend.Position = LegendPos.Float ;
			myPane.Legend.Location = new Location( 0.95f, 0.15f, CoordType.PaneFraction,
								AlignH.Right, AlignV.Top );
			myPane.Legend.FontSpec.Size = 10f;
			myPane.Legend.IsHStack = false;
			
			// Add some pie slices
			PieItem segment1 = myPane.AddPieSlice( 20, Color.Navy, Color.White, 45f, 0, "North" );
			PieItem segment3 = myPane.AddPieSlice( 30, Color.Purple, Color.White, 45f, .0, "East" );
			PieItem segment4 = myPane.AddPieSlice( 10.21, Color.LimeGreen, Color.White, 45f, 0, "West" );
			PieItem segment2 = myPane.AddPieSlice( 40, Color.SandyBrown, Color.White, 45f, 0.2, "South" );
			PieItem segment6 = myPane.AddPieSlice( 250, Color.Red, Color.White, 45f, 0, "Europe" );
			PieItem segment7 = myPane.AddPieSlice( 50, Color.Blue, Color.White, 45f, 0.2, "Pac Rim" );
			PieItem segment8 = myPane.AddPieSlice( 400, Color.Green, Color.White, 45f, 0, "South America" );
			PieItem segment9 = myPane.AddPieSlice( 50, Color.Yellow, Color.White, 45f, 0.2, "Africa" );
			
			segment2.LabelDetail.FontSpec.FontColor = Color.Red;
												
			// Sum up the pie values																					
			CurveList curves = myPane.CurveList ;
			double total = 0 ;
			for ( int x = 0 ; x <  curves.Count ; x++ )
				total += ((PieItem)curves[x]).Value ;

			// Make a text label to highlight the total value
			TextObj text = new TextObj( "Total 2004 Sales\n" + "$" + total.ToString () + "M",
								0.18F, 0.40F, CoordType.PaneFraction );
			text.Location.AlignH = AlignH.Center;
			text.Location.AlignV = AlignV.Bottom;
			text.FontSpec.Border.IsVisible = false ;
			text.FontSpec.Fill = new Fill( Color.White, Color.FromArgb( 255, 100, 100 ), 45F );
			text.FontSpec.StringAlignment = StringAlignment.Center ;
			myPane.GraphObjList.Add( text );

			// Create a drop shadow for the total value text item
			TextObj text2 = new TextObj( text );
			text2.FontSpec.Fill = new Fill( Color.Black );
			text2.Location.X += 0.008f;
			text2.Location.Y += 0.01f;
			myPane.GraphObjList.Add( text2 );
			 
			base.ZedGraphControl.AxisChange();
		}
	}
}