Csharp/C Sharp/2D Graphics/Pie

Arc Pie Demo

/*
GDI+ Programming in C# and VB .NET
by Nick Symmonds
Publisher: Apress
ISBN: 159059035X
*/
using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
namespace MIsc2D_c
{
    /// <summary>
    /// Summary description for MIsc2D.
    /// </summary>
    public class MIsc2D : System.Windows.Forms.Form
    {
    private System.Windows.Forms.Label label1;
    private System.Windows.Forms.Label label2;
    private System.Windows.Forms.Label label3;
    private System.Windows.Forms.ListBox listBox1;
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ruponentModel.Container components = null;
        public MIsc2D()
        {
            //
            // Required for Windows Form Designer support
            //
            InitializeComponent();
            //
            // TODO: Add any constructor code after InitializeComponent call
            //
        }
        /// <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.label1 = new System.Windows.Forms.Label();
      this.label2 = new System.Windows.Forms.Label();
      this.label3 = new System.Windows.Forms.Label();
      this.listBox1 = new System.Windows.Forms.ListBox();
      this.SuspendLayout();
      // 
      // label1
      // 
      this.label1.Location = new System.Drawing.Point(40, 280);
      this.label1.Name = "label1";
      this.label1.Size = new System.Drawing.Size(160, 16);
      this.label1.TabIndex = 0;
      // 
      // label2
      // 
      this.label2.Location = new System.Drawing.Point(40, 296);
      this.label2.Name = "label2";
      this.label2.Size = new System.Drawing.Size(160, 16);
      this.label2.TabIndex = 1;
      // 
      // label3
      // 
      this.label3.Location = new System.Drawing.Point(40, 312);
      this.label3.Name = "label3";
      this.label3.Size = new System.Drawing.Size(160, 16);
      this.label3.TabIndex = 2;
      // 
      // listBox1
      // 
      this.listBox1.Location = new System.Drawing.Point(24, 200);
      this.listBox1.Name = "listBox1";
      this.listBox1.Size = new System.Drawing.Size(192, 69);
      this.listBox1.TabIndex = 3;
      // 
      // MIsc2D
      // 
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(292, 373);
      this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                  this.listBox1,
                                                                  this.label3,
                                                                  this.label2,
                                                                  this.label1});
      this.Name = "MIsc2D";
      this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
      this.Text = "MIsc2D";
      this.Load += new System.EventHandler(this.MIsc2D_Load);
      this.ResumeLayout(false);
    }
        #endregion
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main() 
        {
            Application.Run(new MIsc2D());
        }
    private void MIsc2D_Load(object sender, System.EventArgs e)
    {
    
    }
    protected override void OnPaint(PaintEventArgs e)
    {
      Graphics G = e.Graphics;
      GraphicsPath p = new  GraphicsPath();
      PointF[] pts = { new PointF(50,  50),
                       new PointF(150, 25),
                       new PointF(200, 50)};
      p.AddCurve(pts);
      p.AddRectangle(new Rectangle(60, 60, 50, 50));
      p.AddPie(100, 100, 80, 80, 0, 35);
      G.DrawPath(Pens.Black,p);
      GraphicsPathIterator iter = new GraphicsPathIterator(p);
      label1.Text = "Num pts in path = " + iter.Count.ToString();
      label2.Text = "Num subpaths in path = " + iter.SubpathCount.ToString();
      label3.Text = "Path has curve = " + iter.HasCurve().ToString();
      int StartIndex;
      int EndIndex;
      int i;
      bool IsClosed; 
      // Rewind the Iterator.
      iter.Rewind();
      // List the Subpaths.
      for(i=0;i<iter.SubpathCount;i++) {
        iter.NextSubpath(out StartIndex, out EndIndex, out IsClosed);
        listBox1.Items.Add("Start: " + StartIndex.ToString() +
                           "  End: " + EndIndex.ToString() +
                           "  IsClosed: " + IsClosed.ToString());
      }
    }
    }
}

Draw a pie

using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
using System.Drawing.Drawing2D;
public class Form1 : System.Windows.Forms.Form{
  private System.ruponentModel.Container components = null;
  public Form1(){
    InitializeComponent();
        SetStyle(ControlStyles.Opaque, true);
  }
  protected override void Dispose( bool disposing ){
    if( disposing ){
      if (components != null) 
      {
        components.Dispose();
      }
    }
    base.Dispose( disposing );
  }
    protected override void OnPaint(PaintEventArgs e) {
         Graphics g = e.Graphics;
         g.FillRectangle(Brushes.White, ClientRectangle);
         g.FillPie(Brushes.Chartreuse, new Rectangle(60, 60, 50, 50), 90, 210);
    }
  private void InitializeComponent(){
    this.ruponents = new System.ruponentModel.Container();
    this.Size = new System.Drawing.Size(300,300);
    this.Text = "Form1";
  }
  static void Main() {
    Application.Run(new Form1());
  }
}