using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Drawing.Drawing2D; // for GDI+

namespace lineEllipse
{

        public class Form1 : System.Windows.Forms.Form
        {

                private System.ComponentModel.Container components = null;

                public Form1()
                {
                        InitializeComponent();
                }


                protected override void Dispose( bool disposing )
                {
                        if( disposing )
                        {
                                if (components != null) 
                                {
                                        components.Dispose();
                                }
                        }
                        base.Dispose( disposing );
                }


                private void InitializeComponent()
                {
                        this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
                        this.ClientSize = new System.Drawing.Size(292, 266);
                        this.Name = "Form1";
                        this.Text = "Form1";
                        this.Load += new System.EventHandler(this.Form1_Load);

                }
                #endregion


                [STAThread]
                static void Main() 
                {
                        Application.Run(new Form1());
                }

                private void Form1_Load(object sender, System.EventArgs e)
                {
                        this.Text= Application.ProductName + " " + Application.ProductVersion;
                }


                //in order to paint something OnPaint method needs to be overridden
                protected override void OnPaint(System.Windows.Forms.PaintEventArgs pe)
                {
                        base.OnPaint(pe); // call the superclass (NOTE: this must be here!)

                        try
                        {
                                // --------------- prepare to draw in a specified area ----------------------

                                Rectangle drawingArea; // for drawing in
                                Point pointTopLeft; // drawing area's top left limit
                                Point pointBottomRight; // drawing area's bottom right limit

                                drawingArea = this.ClientRectangle;
                                pointTopLeft = new Point(drawingArea.X, drawingArea.Y);
                                pointBottomRight = new
                                System.Drawing.Point(drawingArea.Width, drawingArea.Height);

                                // need a Brush object to fill in the background color
                                Brush brushBackGround;
                                brushBackGround = new
                                System.Drawing.SolidBrush(System.Drawing.Color.White);

                                // need a Graphics object to draw
                                Graphics myGraphicsObject;
                                myGraphicsObject = pe.Graphics; // initialise it

                                // fill in the background color
                                myGraphicsObject.FillRectangle(brushBackGround, drawingArea);

                                

                                myGraphicsObject.FillRectangle(brushBackGround, drawingArea);



                                int lineWidth = 3;

                                // ----------------- draw the ellipse ------------------------

                                Pen penEllipse; // for drawing the ellipse
                                penEllipse = new
                                        System.Drawing.Pen(System.Drawing.Color.Black, lineWidth);

                                PointF myPoint; // upper-left corner of the ellipse rectangle
                                myPoint = new PointF();
                                myPoint.X = 8;
                                myPoint.Y = 40;

                                SizeF mySize; // width and height of the ellipse rectangle
                                mySize = new SizeF();
                                mySize.Height = 160;
                                mySize.Width = 180;

                                RectangleF ellipseArea; // defines the ellipse area
                                ellipseArea = new System.Drawing.RectangleF(myPoint, mySize);

                                myGraphicsObject.DrawEllipse(penEllipse, ellipseArea);

                                
                                PointF myPoint1; // upper-left corner of the ellipse rectangle
                                myPoint1 = new PointF();
                                myPoint1.X = myPoint.X + mySize.Height;
                                myPoint1.Y = myPoint.Y + mySize.Width;
                                
                                LinearGradientBrush linGrBrush = new LinearGradientBrush(
                                        myPoint,
                                        myPoint1,
                                        Color.Red,
                                        Color.Blue);
                                linGrBrush.GammaCorrection = true;

//                                myGraphicsObject.FillEllipse(linGrBrush,ellipseArea);

                                GraphicsPath path = new GraphicsPath();
                                path.AddEllipse(ellipseArea);
                                PathGradientBrush pthGrBrush = new PathGradientBrush(path);
                                pthGrBrush.CenterColor = Color.FromArgb(255, 0, 0, 255);
                                // Set the color along the entire boundary 
                                // of the path to aqua.
                                Color[] colors = {Color.FromArgb(255, 0, 255, 255)};
                                pthGrBrush.SurroundColors = colors;

                                myGraphicsObject.FillEllipse(pthGrBrush,ellipseArea);

                                
                                // ----------------- draw lines ------------------------

                                Pen penLine = new System.Drawing.Pen(System.Drawing.Color.Red, lineWidth);

                                Point pointLineEnd1 = new Point(); // one end of the line
                                pointLineEnd1.X = 0;
                                pointLineEnd1.Y = 0;

                                Point pointLineEnd2 = new Point(); // other end of the line
                                pointLineEnd2.X = 300;
                                pointLineEnd2.Y = 300;

                                // draw the first line
                                myGraphicsObject.DrawLine(penLine, pointLineEnd1, pointLineEnd2);

                                // scoot the end points over, change pen color, and draw another line
                                pointLineEnd1.Y = pointLineEnd1.Y + 10;
                                pointLineEnd2.Y = pointLineEnd2.Y + 30;
                                penLine = new Pen(System.Drawing.Color.Orange, lineWidth);
                                
                                myGraphicsObject.DrawLine(penLine, pointLineEnd1, pointLineEnd2);

                                // scoot the end points over, change pen color, and draw another line
                                pointLineEnd1.Y = pointLineEnd1.Y + 10;
                                pointLineEnd2.Y = pointLineEnd2.Y + 30;
                                penLine = new Pen(System.Drawing.Color.Green, lineWidth);

                                myGraphicsObject.DrawLine(penLine, pointLineEnd1, pointLineEnd2);

                                // scoot the end points over, change pen color, and draw another line
                                pointLineEnd1.Y = pointLineEnd1.Y + 10;
                                pointLineEnd2.Y = pointLineEnd2.Y + 30;
                                penLine = new Pen(System.Drawing.Color.Blue, lineWidth);
                                
                                myGraphicsObject.DrawLine(penLine, pointLineEnd1, pointLineEnd2);

                                // scoot the end points over, change pen color, and draw another line
                                pointLineEnd1.Y = pointLineEnd1.Y + 10;
                                pointLineEnd2.Y = pointLineEnd2.Y + 30;
                                penLine = new Pen(System.Drawing.Color.Yellow, lineWidth);

                                myGraphicsObject.DrawLine(penLine, pointLineEnd1, pointLineEnd2);

                                // scoot the end points over, change pen color, and draw another line
                                pointLineEnd1.Y = pointLineEnd1.Y + 10;
                                pointLineEnd2.Y = pointLineEnd2.Y + 30;
                                penLine = new Pen(System.Drawing.Color.Purple, lineWidth);

                                myGraphicsObject.DrawLine(penLine, pointLineEnd1, pointLineEnd2);
                        }
                        catch (Exception ex)
                        {
                                MessageBox.Show(ex.Message);
                        }
                        catch
                        {
                                MessageBox.Show("unknown exception");
                        }
                } // end OnPaint


        } // end class
} // end namespace