A flexible charting library for .NET

//============================================================================
//ZedGraph demo code
//The code contained in this file (only) is released into the public domain, so you
//can copy it into your project without any license encumbrance.  Note that
//the actual ZedGraph library code is licensed under the LGPL, which is not
//public domain.
//
//This file 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.
//=============================================================================
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using ZedGraph;

namespace WindowsApplication2
{
	/// <summary>
	/// Summary description for Form1.
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private ZedGraph.ZedGraphControl zg1;
		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;

		public Form1()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();
		}

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			this.zg1 = new ZedGraph.ZedGraphControl();
			this.SuspendLayout();
			// 
			// zg1
			// 
			this.zg1.IsAutoScrollRange = false;
			this.zg1.IsEnableHPan = true;
			this.zg1.IsEnableHZoom = true;
			this.zg1.IsEnableVPan = true;
			this.zg1.IsEnableVZoom = true;
			this.zg1.IsPrintFillPage = true;
			this.zg1.IsPrintKeepAspectRatio = true;
			this.zg1.IsScrollY2 = false;
			this.zg1.IsShowContextMenu = true;
			this.zg1.IsShowCopyMessage = true;
			this.zg1.IsShowCursorValues = false;
			this.zg1.IsShowHScrollBar = false;
			this.zg1.IsShowPointValues = false;
			this.zg1.IsShowVScrollBar = false;
			this.zg1.IsZoomOnMouseCenter = false;
			this.zg1.Location = new System.Drawing.Point(8, 8);
			this.zg1.Name = "zg1";
			this.zg1.PanButtons = System.Windows.Forms.MouseButtons.Left;
			this.zg1.PanButtons2 = System.Windows.Forms.MouseButtons.Middle;
			this.zg1.PanModifierKeys2 = System.Windows.Forms.Keys.None;
			this.zg1.PointDateFormat = "g";
			this.zg1.PointValueFormat = "G";
			this.zg1.ScrollMaxX = 0;
			this.zg1.ScrollMaxY = 0;
			this.zg1.ScrollMaxY2 = 0;
			this.zg1.ScrollMinX = 0;
			this.zg1.ScrollMinY = 0;
			this.zg1.ScrollMinY2 = 0;
			this.zg1.Size = new System.Drawing.Size(664, 400);
			this.zg1.TabIndex = 1;
			this.zg1.ZoomButtons = System.Windows.Forms.MouseButtons.Left;
			this.zg1.ZoomButtons2 = System.Windows.Forms.MouseButtons.None;
			this.zg1.ZoomModifierKeys = System.Windows.Forms.Keys.None;
			this.zg1.ZoomModifierKeys2 = System.Windows.Forms.Keys.None;
			this.zg1.ZoomStepFraction = 0.1;
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(680, 414);
			this.Controls.Add(this.zg1);
			this.Name = "Form1";
			this.Text = "Form1";
			this.Resize += new System.EventHandler(this.Form1_Resize);
			this.Load += new System.EventHandler(this.Form1_Load);
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run( new Form1() );
		}

		private void Form1_Load( object sender, System.EventArgs e )
		{
			// Get a reference to the GraphPane instance in the ZedGraphControl
			GraphPane myPane = zg1.GraphPane;

			// Set the titles and axis labels
			myPane.Title = "Demonstration of Dual Y Graph";
			myPane.XAxis.Title = "Time, Days";
			myPane.YAxis.Title = "Parameter A";
			myPane.Y2Axis.Title = "Parameter B";
			
			// Make up some data points based on the Sine function
			PointPairList list = new PointPairList();
			PointPairList list2 = new PointPairList();
			for ( int i=0; i<36; i++ )
			{
				double x = (double) i * 5.0;
				double y = Math.Sin( (double) i * Math.PI / 15.0 ) * 16.0;
				double y2 = y * 13.5;
				list.Add( x, y );
				list2.Add( x, y2 );
			}

			// Generate a red curve with diamond symbols, and "Alpha" in the legend
			LineItem myCurve = myPane.AddCurve( "Alpha",
				list, Color.Red, SymbolType.Diamond );
			// Fill the symbols with white
			myCurve.Symbol.Fill = new Fill( Color.White );

			// Generate a blue curve with circle symbols, and "Beta" in the legend
			myCurve = myPane.AddCurve( "Beta",
				list2, Color.Blue, SymbolType.Circle );
			// Fill the symbols with white
			myCurve.Symbol.Fill = new Fill( Color.White );
			// Associate this curve with the Y2 axis
			myCurve.IsY2Axis = true;

			// Show the x axis grid
			myPane.XAxis.IsShowGrid = true;

			// Make the Y axis scale red
			myPane.YAxis.ScaleFontSpec.FontColor = Color.Red;
			myPane.YAxis.TitleFontSpec.FontColor = Color.Red;
			// turn off the opposite tics so the Y tics don't show up on the Y2 axis
			myPane.YAxis.IsOppositeTic = false;
			myPane.YAxis.IsMinorOppositeTic = false;
			// Don't display the Y zero line
			myPane.YAxis.IsZeroLine = false;
			// Align the Y axis labels so they are flush to the axis
			myPane.YAxis.ScaleAlign = AlignP.Inside;
			// Manually set the axis range
			myPane.YAxis.Min = -30;
			myPane.YAxis.Max = 30;

			// Enable the Y2 axis display
			myPane.Y2Axis.IsVisible = true;
			// Make the Y2 axis scale blue
			myPane.Y2Axis.ScaleFontSpec.FontColor = Color.Blue;
			myPane.Y2Axis.TitleFontSpec.FontColor = Color.Blue;
			// turn off the opposite tics so the Y2 tics don't show up on the Y axis
			myPane.Y2Axis.IsOppositeTic = false;
			myPane.Y2Axis.IsMinorOppositeTic = false;
			// Display the Y2 axis grid lines
			myPane.Y2Axis.IsShowGrid = true;
			// Align the Y2 axis labels so they are flush to the axis
			myPane.Y2Axis.ScaleAlign = AlignP.Inside;

			// Fill the axis background with a gradient
			myPane.AxisFill = new Fill( Color.White, Color.LightGray, 45.0f );

			// Add a text box with instructions
			TextItem text = new TextItem(
				"Zoom: left mouse & drag\nPan: middle mouse & drag\nContext Menu: right mouse",
				0.05f, 0.95f, CoordType.AxisFraction, AlignH.Left, AlignV.Bottom );
			text.FontSpec.StringAlignment = StringAlignment.Near;
			myPane.GraphItemList.Add( text );

			// Enable scrollbars if needed
			zg1.IsShowHScrollBar = true;
			zg1.IsShowVScrollBar = true;
			zg1.IsAutoScrollRange = true;
			zg1.IsScrollY2 = true;

			// OPTIONAL: Show tooltips when the mouse hovers over a point
			zg1.IsShowPointValues = true;
			zg1.PointValueEvent += new ZedGraphControl.PointValueHandler( MyPointValueHandler );

			// OPTIONAL: Add a custom context menu item
			zg1.ContextMenuBuilder += new ZedGraphControl.ContextMenuBuilderEventHandler( MyContextMenuBuilder );

			// OPTIONAL: Handle the Zoom Event
			zg1.ZoomEvent += new ZedGraphControl.ZoomEventHandler( MyZoomEvent );

			// Size the control to fit the window
			SetSize();

			// Tell ZedGraph to calculate the axis ranges
			// Note that you MUST call this after enabling IsAutoScrollRange, since AxisChange() sets
			// up the proper scrolling parameters
			zg1.AxisChange();
			// Make sure the Graph gets redrawn
			zg1.Invalidate();

		}

		/// <summary>
		/// On resize action, resize the ZedGraphControl to fill most of the Form, with a small
		/// margin around the outside
		/// </summary>
		private void Form1_Resize(object sender, EventArgs e)
		{
			SetSize();
		}

		private void SetSize()
		{
			// Leave a small margin around the outside of the control
			Size size = new Size( this.Size.Width - 25,
				this.Size.Height - 50 );
			zg1.Size = size;
		}

		/// <summary>
		/// Display customized tooltips when the mouse hovers over a point
		/// </summary>
		private string MyPointValueHandler( ZedGraphControl control, GraphPane pane,
						CurveItem curve, int iPt )
		{
			// Get the PointPair that is under the mouse
			PointPair pt = curve[iPt];

			return curve.Label + " is " + pt.Y.ToString("f2") + " units at " + pt.X.ToString("f1") + " days";
		}

		/// <summary>
		/// Customize the context menu by adding a new item to the end of the menu
		/// </summary>
		private void MyContextMenuBuilder( ZedGraphControl control, ContextMenu menu, Point mousePt )
		{
			MenuItem menuItem = new MenuItem();
			menuItem.Index = menu.MenuItems.Count + 1;
			menuItem.Text = "Add a new Beta Point";
			menuItem.Click += new System.EventHandler( AddBetaPoint );

			menu.MenuItems.Add( menuItem );
		}

		/// <summary>
		/// Handle the "Add New Beta Point" context menu item.  This finds the curve with
		/// the CurveItem.Label = "Beta", and adds a new point to it.
		/// </summary>
		private void AddBetaPoint( object sender, EventArgs args )
		{
			// Get a reference to the "Beta" curve IPointListEdit
			IPointListEdit ip = zg1.GraphPane.CurveList["Beta"].Points as IPointListEdit;
			if ( ip != null )
			{
				double x = ip.Count * 5.0;
				double y = Math.Sin( ip.Count * Math.PI / 15.0 ) * 16.0 * 13.5;
				ip.Add( x, y );
				zg1.AxisChange();
				zg1.Refresh();
			}
		}

		// Respond to a Zoom Event
		private void MyZoomEvent(ZedGraphControl control, ZoomState oldState,
					ZoomState newState)
		{
			// Here we get notification everytime the user zooms
		}

	}
}