using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

public class Form1 : Form {

    protected override void OnPaint(PaintEventArgs e) {
        Graphics g = e.Graphics;
        g.FillRectangle(Brushes.White, this.ClientRectangle);

        Pen p = new Pen(Color.Black);
        g.DrawLine(p, 0, 0, 100, 100);
        p.Dispose();
    }
    public static void Main() {
        Application.Run(new Form1());
    }
}

    

   

/*
Mastering Visual C# .NET
by Jason Price, Mike Gunderloy

Publisher: Sybex;
ISBN: 0782129110
*/

/*
  Example21_2.cs illustrates the use of multiple Pens
*/

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

public class Example21_2 : System.Windows.Forms.Form
{
  private System.ComponentModel.Container components = null;

  public Example21_2()
  {
    InitializeComponent();
  }

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

  private void InitializeComponent()
  {
    this.BackColor = System.Drawing.Color.White;
    this.ClientSize = new System.Drawing.Size(400, 400);
    this.Name = "Example21_2";
    this.Text = "Example21_2";
    this.Paint += new System.Windows.Forms.
      PaintEventHandler(this.Example21_2_Paint);
  }


  static void Main() 
  {
    Application.Run(new Example21_2());
  }

  private void Example21_2_Paint(
    object sender, System.Windows.Forms.PaintEventArgs e)
  {
    Graphics g = e.Graphics;
    // draw two lines with one pen
    Pen p = new Pen(Color.Black, 10);
    g.DrawLine(p, 25, 25, 375, 375);
    g.DrawLine(p, 25, 375, 375, 25);
    // draw four lines with another pen
    Pen p2 = new Pen(Color.Gray, 7);
    p2.EndCap = LineCap.Round;
    p2.StartCap = LineCap.ArrowAnchor;
    g.DrawLine(p2, 25, 35, 25, 365);
    g.DrawLine(p2, 35, 375, 365, 375);
    g.DrawLine(p2, 375, 365, 375, 35);
    g.DrawLine(p2, 365, 25, 35, 25);
  }
}



           
          

   

/*
User Interfaces in C#: Windows Forms and Custom Controls
by Matthew MacDonald

Publisher: Apress
ISBN: 1590590457
*/

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Drawing.Drawing2D;

namespace GDI_Basics
{
    /// <summary>
    /// Summary description for PenDashStyles.
    /// </summary>
    public class PenDashStyles : System.Windows.Forms.Form
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.Container components = null;

        public PenDashStyles()
        {
            //
            // 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()
        {
            // 
            // PenDashStyles
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(500, 398);
            this.Name = "PenDashStyles";
            this.Text = "PenDashStyles";
            this.Resize += new System.EventHandler(this.PenDashStyles_Resize);
            this.Paint += new System.Windows.Forms.PaintEventHandler(this.PenDashStyles_Paint);

        }
        #endregion

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

        private void PenDashStyles_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
        {
            Pen myPen = new Pen(Color.Blue, 10);
            int y = 20;
            foreach (DashStyle dash in System.Enum.GetValues(typeof(DashStyle)))
            {
                myPen.DashStyle = dash;
                e.Graphics.DrawLine(myPen, 20, y, 100, y);
                e.Graphics.DrawString(dash.ToString(), new Font("Tahoma", 8), Brushes.Black, 120, y - 10);
                y += 30;
            }
            
            y += 10;
            myPen.StartCap = LineCap.Round;
            myPen.EndCap = LineCap.Round;
            
            foreach (DashStyle dash in System.Enum.GetValues(typeof(DashStyle)))
            {
                myPen.DashStyle = dash;
                e.Graphics.DrawLine(myPen, 20, y, 100, y);
                e.Graphics.DrawString(dash.ToString() + " (with round caps)", new Font("Tahoma", 8), Brushes.Black, 120, y - 10);
                y += 30;
            }
        }

        private void PenDashStyles_Resize(object sender, System.EventArgs e)
        {
            this.Invalidate();
        }
    }
}


           
          

   

  using System;
  using System.Drawing;
  using System.Drawing.Drawing2D;
  using System.Collections;
  using System.ComponentModel;
  using System.Windows.Forms;
  using System.Data;

  public class MainForm : System.Windows.Forms.Form
  {
    public MainForm()
    {
      InitializeComponent();
      CenterToScreen();
      SetStyle(ControlStyles.ResizeRedraw, true);  
    }

    private void InitializeComponent()
    {
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(292, 273);
      this.Text = "Pens...";
      this.Resize += new System.EventHandler(this.Form1_Resize);
      this.Paint += new System.Windows.Forms.PaintEventHandler(this.MainForm_Paint);

    }
    static void Main() 
    {
      Application.Run(new MainForm());
    }

    private void MainForm_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
    {
      Graphics g = e.Graphics;
      Pen bluePen = new Pen(Color.Blue, 20);
      Pen pen2 = Pens.Firebrick;

      // Render some shapes with the pens.
      g.DrawEllipse(bluePen, 10, 10, 100, 100);
      g.DrawLine(pen2, 10, 130, 110, 130);
      g.DrawPie(Pens.Black, 150, 10, 120, 150, 90, 80);

    }

    private void Form1_Resize(object sender, System.EventArgs e)
    {
       Invalidate();  
    }
  }


           
          

   



  using System;
  using System.Drawing;
  using System.Drawing.Drawing2D;
  using System.Collections;
  using System.ComponentModel;
  using System.Windows.Forms;
  using System.Data;

  public class Form1 : System.Windows.Forms.Form
  {
    public Form1()
    {
      InitializeComponent();
    }
    private void InitializeComponent()
    {
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(292, 273);
      this.Text = "";
      this.Resize += new System.EventHandler(this.Form1_Resize);
      this.Paint += new System.Windows.Forms.PaintEventHandler(this.Form1_Paint);

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

    private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
    {      
      Graphics g = e.Graphics;
      Pen p = new Pen(Color.Black, 3);
      p.Alignment = PenAlignment.Inset;
      g.DrawRectangle(p, 3, 3, 80, 70);
      p.Dispose();

    }

    private void Form1_Resize(object sender, System.EventArgs e)
    {
      Invalidate();
    }
  }

           
          

   



  using System;
  using System.Drawing;
  using System.Drawing.Drawing2D;
  using System.Collections;
  using System.ComponentModel;
  using System.Windows.Forms;
  using System.Data;

  public class Form1 : System.Windows.Forms.Form
  {
    public Form1()
    {
      InitializeComponent();
    }
    private void InitializeComponent()
    {
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(292, 273);
      this.Text = "";
      this.Resize += new System.EventHandler(this.Form1_Resize);
      this.Paint += new System.Windows.Forms.PaintEventHandler(this.Form1_Paint);

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

    private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
    {      
        Graphics g = e.Graphics;
      Pen p = new Pen(Color.Black, 3);
      p.Alignment = PenAlignment.Center;
      g.DrawRectangle(p, 3, 3, 80, 70);
      p.Dispose();
    }

    private void Form1_Resize(object sender, System.EventArgs e)
    {
      Invalidate();
    }
  }

           
          

   

using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

public class TestGDI1 : System.Windows.Forms.Form{
    
    //in order to paint something OnPaint method needs to be overridden
    
    protected override void OnPaint(System.Windows.Forms.PaintEventArgs pe) {
        //OnPaint method is a member of Form class 
        //The following call sends pe to an event listener Graphics
        base.OnPaint(pe);
        
        //initialize Graphics 
        System.Drawing.Graphics g=pe.Graphics;
        
        //designate the area of the form where the drawing must take place
        //ClientRectangle is a member of Windows.Forms.Control class
        System.Drawing.Rectangle client_area=this.ClientRectangle;
        
        //point11 is at the top left corner of the client_area
        System.Drawing.Point point11=new System.Drawing.Point(client_area.X,client_area.Y); 
        //point12 is at the bottom right corner of the client area
        
        System.Drawing.Point point12=new System.Drawing.Point(client_area.Width,client_area.Height);
        
        //create a Brush object of white color
        //SolidBrush means that the color does not change from point to point
        System.Drawing.Brush background=new System.Drawing.SolidBrush(System.Drawing.Color.White);
        
        //color client_area with solid white brush
        g.FillRectangle(background,client_area);
        
        //make red and blue pens
        System.Drawing.Pen p=new System.Drawing.Pen(System.Drawing.Color.Red);
        System.Drawing.Pen p1=new System.Drawing.Pen(System.Drawing.Color.Blue);
        
        //create points and rectangles
        System.Drawing.SizeF size=new System.Drawing.SizeF();
        size.Height=160;
        size. Width=180;
        System.Drawing.PointF point=new System.Drawing.PointF();
        point.X=8;
        point.Y=40;
        System.Drawing.Point point1=new System.Drawing.Point();
        point1.X=300;
        point1.Y=300;
        System.Drawing.Point point2=new System.Drawing.Point();
        point2.X=0;
        point2.Y=0;
        System.Drawing.RectangleF rec =new System.Drawing.RectangleF(point,size);
        
        //draw an ellipse inscribed in the invisible rectangle rec
        //to change the size or shape of the ellipse change an invisible rectangle in which it is inscribed
        //to change the color of the ellipse, change the color of the pen p which is used to draw it
        
        g.DrawEllipse(p,rec);
    
        //draw a line between a pair of points point1 and point2 with pen p1
        g.DrawLine(p1,point1,point2);
    }
    public static void Main() {
        System.Windows.Forms.Application.Run(new TestGDI1());//display form
    }
}