Csharp/C Sharp/2D Graphics/Brush

Brushes.Black

 
using System;
using System.Drawing;
using System.Windows.Forms;
   
class HelloWorld: Form
{
     public static void Main()
     {
          Application.Run(new HelloWorld());
     }
     public HelloWorld()
     {
          Text = "Hello World";
          BackColor = Color.White;
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          Graphics graphics = pea.Graphics;
   
          graphics.DrawString("Hello, Windows Forms!", Font, 
                          Brushes.Black, 0, 0);
     }
}

Brush Style

using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Drawing.Drawing2D;
namespace GDI_Basics
{
    public class HatchBrushes : System.Windows.Forms.Form
    {
        private System.ruponentModel.Container components = null;
        public HatchBrushes()
        {
            InitializeComponent();
        }
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if(components != null)
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }
        #region Windows Form Designer generated code
        private void InitializeComponent()
        {
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(564, 390);
            this.Resize += new System.EventHandler(this.HatchBrushes_Resize);
            this.Paint += new System.Windows.Forms.PaintEventHandler(this.HatchBrushes_Paint);
        }
        #endregion
        private void HatchBrushes_Resize(object sender, System.EventArgs e)
        {
            this.Invalidate();
        }
        private void HatchBrushes_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
        {
            HatchBrush myBrush;
            int y = 20;
            int x = 20;
            foreach (HatchStyle brushStyle in System.Enum.GetValues(typeof(HatchStyle)))
            {
                myBrush = new HatchBrush(brushStyle, Color.Blue, Color.LightYellow);
                e.Graphics.FillRectangle(myBrush, x, y, 40, 20);
                e.Graphics.DrawString(brushStyle.ToString(), new Font("Tahoma", 8), 
                    Brushes.Black, 50 + x, y + 5);
                y += 30;
                if ((y + 30) > this.ClientSize.Height)
                {
                    y = 20;
                    x += 180;
                }
            }
        }
        [STAThread]
        static void Main() 
        {
            Application.Run(new HatchBrushes());
        }
    }
}

Gradient brush demo

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
public class Form1 : System.Windows.Forms.Form{
    private System.ruponentModel.IContainer components;
  public Form1(){
    InitializeComponent();
  }

  #region Windows Form Designer generated code
  private void InitializeComponent(){
      this.ruponents = new System.ruponentModel.Container();
      this.timer1 = new System.Windows.Forms.Timer(this.ruponents);
      this.timer1.Enabled = true;
      this.timer1.Tick += new System.EventHandler(this.timer1_Tick);
      this.AutoScaleBaseSize = new System.Drawing.Size(6, 15);
      this.ClientSize = new System.Drawing.Size(292, 260);
      this.Name = "Form1";
      this.Text = "LinearGradientBrush Demo";
      this.Load += new System.EventHandler(this.Form1_Load);
      this.Paint += new System.Windows.Forms.PaintEventHandler(this.Form1_Paint);
    }
  #endregion
  static void Main(){
    Application.Run(new Form1());
  }
    private void Form1_Load(object sender, System.EventArgs e) {
      this.BackColor = Color.FromArgb(255, 0, 0, 255);  
    }
    private System.Windows.Forms.Timer timer1;
    private float angle = 0;
    private LinearGradientBrush GetBrush()
    {
      return new LinearGradientBrush(
        new Rectangle( 20, 20, 200, 100),
        Color.Orange,
        Color.Yellow,
        0.0F,
        true);
    }

    private void Rotate( Graphics graphics, LinearGradientBrush brush )
    {
      brush.RotateTransform(angle);
      brush.SetBlendTriangularShape(.5F);
      graphics.FillRectangle(brush, brush.Rectangle);
    }
    private void Rotate(Graphics graphics)
    {
      angle += 5 % 360;
      Rotate(graphics, GetBrush());
    }
    private void timer1_Tick(object sender, System.EventArgs e)
    {
      Rotate(CreateGraphics());
    }
    private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
    {
      Rotate(e.Graphics);
    }
}

Hatch Brush Styles

using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
using System.Drawing.Drawing2D;  // LinearGradientBrush
namespace HatchBrushStyles
{
    public class HatchBrushStyles : System.Windows.Forms.Form
    {
        private System.ruponentModel.Container components = null;
        public HatchBrushStyles()
        {
            InitializeComponent();
            this.Size = new Size(500, 150);
        }
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (components != null) 
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }
        #region Windows Form Designer generated code
        private void InitializeComponent()
        {
            this.ruponents = new System.ruponentModel.Container();
            this.Size = new System.Drawing.Size(300,300);
            this.Text = "HatchBrushStyles";
        }
        #endregion
        [STAThread]
        static void Main() 
        {
            Application.Run(new HatchBrushStyles());
        }
        protected override void OnPaint(PaintEventArgs e)
        {   
            Graphics g = e.Graphics;
            Font f = new Font(new FontFamily("Times New Roman"), 10);
            Brush fb = new SolidBrush(Color.Black);
            Color cb = Color.Red, cf =Color.White;
         
            int wi = 30, hi = 25, rectNb = 14;
            int x, y;
            HatchBrush hb = null;
            for(int i = 0; i < 53; i++)
            {
                x = (int)(i % rectNb);
                y = (int)(i / rectNb);
                hb = new HatchBrush((HatchStyle)i, cf, cb);
                g.FillRectangle(hb, 2 + x*(5 + wi), 2 + y*(5 + hi), wi, hi);
            }
            
            fb.Dispose();   hb.Dispose();   g.Dispose();
        }
    }
}

Hexagon Gradient Brush

 
using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
   
class HexagonGradientBrush: Form
{
     const float fSide = 50;       // Side (also radius) of hexagon
   
     public static void Main()
     {
          Application.Run(new HexagonGradientBrush());
     }
     public HexagonGradientBrush()
     {
          ResizeRedraw = true; 
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
     }        
     protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
     {
          float fHalf = fSide * (float) Math.Sin(Math.PI / 3); 
          
          PointF[] aptf = {new PointF( fSide,         0),           
                           new PointF( fSide * 1.5f,  0),
                           new PointF( fSide,         0),           
                           new PointF( fSide / 2,    -fHalf),
                           new PointF(-fSide / 2,    -fHalf),
                           new PointF(-fSide,         0),
                           new PointF(-fSide * 1.5f,  0), 
                           new PointF(-fSide,         0),
                           new PointF(-fSide / 2,     fHalf),     
                           new PointF( fSide / 2,     fHalf) };
   
          PathGradientBrush pgbrush1 =  new PathGradientBrush(aptf, WrapMode.Tile);
   
          for (int i = 0; i < aptf.Length; i++)
          {
               aptf[i].X += fSide * 1.5f;
               aptf[i].Y += fHalf;
          }
          PathGradientBrush pgbrush2 = 
                              new PathGradientBrush(aptf, WrapMode.Tile);
   
          grfx.FillRectangle(pgbrush1, 0, 0, cx, cy);
          grfx.FillRectangle(pgbrush2, 0, 0, cx, cy);
     }
}

illustrates filling shapes with a brush

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
public class Example21_4 : System.Windows.Forms.Form
{
  private System.ruponentModel.Container components = null;
  public Example21_4()
  {
    InitializeComponent();
  }
  private void InitializeComponent()
  {
    this.BackColor = System.Drawing.Color.White;
    this.ClientSize = new System.Drawing.Size(400, 400);
    this.Name = "Example21_4";
    this.Text = "Example21_4";
    this.Paint += new System.Windows.Forms.
      PaintEventHandler(this.Example21_4_Paint);
  }

  static void Main() 
  {
    Application.Run(new Example21_4());
  }
  private void Example21_4_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
  {
    Graphics g = e.Graphics;
    Brush brSolid = new SolidBrush(Color.Blue);
    Brush brHatch = new HatchBrush(HatchStyle.HorizontalBrick,
      Color.Red, Color.Yellow);
    Brush brGradient = new LinearGradientBrush(new Rectangle(0, 0, 200, 200), Color.Black, Color.LightGray, 45, false);
    g.FillRectangle(brGradient, 10, 10, 200, 200);
    g.FillEllipse(brHatch, 200, 200, 150, 190);
    g.FillPie(brSolid, 0, 0, 300, 300, 285, 75);
  }
}

Solid brush demo

  using System;
  using System.Drawing;
  using System.Collections;
  using System.ruponentModel;
  using System.Windows.Forms;
  using System.Data;
  public class MainForm : System.Windows.Forms.Form
  {
    private System.ruponentModel.Container components;
    public MainForm()
    {
      InitializeComponent();
      BackColor = Color.LemonChiffon;  
      Text = "www.nfex.ru";    
      Size = new Size(200, 200);    
      CenterToScreen();        
    }
    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, 273);
      this.Text = "Form1";
      this.Resize += new System.EventHandler(this.MainForm_Resize);
      this.Paint += new System.Windows.Forms.PaintEventHandler(this.MainForm_Paint);
    }
    [STAThread]
    static void Main() 
    {
      Application.Run(new MainForm());
    }
    private void MainForm_Resize(object sender, System.EventArgs e)
    {
      Invalidate();
    }
    private void MainForm_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
    {
      Graphics g = e.Graphics;
      g.DrawString("www.nfex.ru", 
        new Font("Times New Roman", 20), 
        new SolidBrush(Color.Black), 
        this.DisplayRectangle);
    }
  }

Use Brushes.Aquamarine to draw a Ellipse

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.FillEllipse(Brushes.Aquamarine, new Rectangle(60, 20, 50, 30));
    }
  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());
  }
}

Use Brushes.BlueViolet ro draw a Polygon

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.FillPolygon(Brushes.BlueViolet, new Point[] {
                                                          new Point(110, 10),
                                                          new Point(150, 10),
                                                          new Point(160, 40),
                                                          new Point(120, 20),
                                                          new Point(120, 60),
         });
    }
  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());
  }
}

Use Brush to draw a Rectangle

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.FillRectangle(Brushes.Red, new Rectangle(10, 10, 50, 50));
    }
  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());
  }
}