Csharp/C Sharp by API/System.Drawing.Drawing2D/PathGradientBrush

new PathGradientBrush(GraphicsPath path)

<source lang="csharp"> using System; using System.Collections.Generic; using System.ruponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using System.Drawing.Drawing2D; public class Form1 : Form {

 public Form1() {
       InitializeComponent();
 }
 private void Form1_Paint(object sender, PaintEventArgs e)
 {
     GraphicsPath path = new GraphicsPath();
     int size = 150;
     path.AddEllipse(10, 10, size, size);
     
     PathGradientBrush brush = new PathGradientBrush(path);
     brush.WrapMode = WrapMode.Tile;
     brush.SurroundColors = new Color[] { Color.White };
     brush.CenterColor = Color.Violet;
     e.Graphics.FillRectangle(brush, 10, 10, size, size);
     
     path.Dispose();
     brush.Dispose();
 }
 private void InitializeComponent()
 {
   this.SuspendLayout();
   this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
   this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
   this.ClientSize = new System.Drawing.Size(292, 266);
   this.Name = "Form1";
   this.Text = "Alpha Blending";
   this.Paint += new System.Windows.Forms.PaintEventHandler(this.Form1_Paint);
   this.ResumeLayout(false);
 }

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

}

 </source>

new PathGradientBrush(Path.PathPoints, WrapMode.Tile);

<source lang="csharp">

using System; using System.Drawing; using System.Drawing.Drawing2D; using System.Collections; using System.ruponentModel; using System.Windows.Forms; using System.Data; namespace GradientWrap_c {

   public class GradientWrap : System.Windows.Forms.Form
   {
       private System.ruponentModel.Container components = null;
       public GradientWrap()
       {
     this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
     this.ClientSize = new System.Drawing.Size(292, 273);
     this.Name = "GradientWrap";
     this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
     this.Text = "GradientWrap";
     this.Load += new System.EventHandler(this.GradientWrap_Load);
       }
       static void Main() 
       {
           Application.Run(new GradientWrap());
       }
   private void GradientWrap_Load(object sender, System.EventArgs e)
   {
   
   }
   protected override void OnPaint( PaintEventArgs e )
   {
     GraphicsPath Path = new GraphicsPath();
     Rectangle R = new Rectangle(10, 10, 50, 50);
     e.Graphics.DrawRectangle(Pens.Black,R);
     Path.AddRectangle(R);
     

// PathGradientBrush B = new PathGradientBrush(Path.PathPoints);

     PathGradientBrush B = new PathGradientBrush(Path.PathPoints, 
       WrapMode.Tile);
     Color[] c = { Color.Blue, Color.Aqua, Color.Red };
     B.CenterColor = Color.White;
     B.SurroundColors = c;
     //Small circle inside gradient path
     e.Graphics.FillEllipse(B, 15, 15, 30, 30);
     //Large circle outside gradient path
     e.Graphics.FillEllipse(B, 50, 50, 150, 150);
   }
   }

}

 </source>

PathGradientBrush.CenterColor

<source lang="csharp">

using System; using System.Collections.Generic; using System.ruponentModel; using System.Data; using System.Drawing; using System.Drawing.Drawing2D; using System.Text; using System.Windows.Forms; public class Form1 : Form {

   protected override void OnPaint(PaintEventArgs e) {
       Graphics g = e.Graphics;
       GraphicsPath gp = new GraphicsPath();
       gp.AddLine(10, 10, 110, 15);
       gp.AddLine(110, 15, 100, 96);
       gp.AddLine(100, 96, 15, 110);
       gp.CloseFigure();
       g.FillRectangle(Brushes.White, this.ClientRectangle);
       g.SmoothingMode = SmoothingMode.AntiAlias;
       PathGradientBrush pgb = new PathGradientBrush(gp);
       pgb.CenterColor = Color.White;
       pgb.SurroundColors = new Color[] { Color.Blue };
       g.FillPath(pgb, gp);
       g.DrawPath(Pens.Black, gp);
       pgb.Dispose();
       gp.Dispose();
   }
   public static void Main() {
       Application.Run(new Form1());
   }

}

 </source>

PathGradientBrush.CenterPoint

<source lang="csharp"> using System; using System.Drawing; using System.Drawing.Drawing2D; using System.Windows.Forms; class BouncingGradientBrushBall : Form {

   public static void Main() {
       Application.Run(new BouncingGradientBrushBall());
   }
   public BouncingGradientBrushBall() {
       ResizeRedraw = true;
   }
   protected override void OnPaint(PaintEventArgs pea) {
       GraphicsPath path = new GraphicsPath();
       Rectangle rect = new Rectangle(10, 10, 30, 30);
       path.AddEllipse(rect);
       PathGradientBrush pgbrush = new PathGradientBrush(path);
       pgbrush.CenterPoint = new PointF((rect.Left + rect.Right) / 3,
                                        (rect.Top + rect.Bottom) / 3);
       pgbrush.CenterColor = Color.White;
       pgbrush.SurroundColors = new Color[] { Color.Red };
       pea.Graphics.FillRectangle(pgbrush, rect);
   }

}

 </source>

PathGradientBrush.SurroundColors

<source lang="csharp">

using System; using System.Collections.Generic; using System.ruponentModel; using System.Data; using System.Drawing; using System.Drawing.Drawing2D; using System.Text; using System.Windows.Forms; public class Form1 : Form {

   protected override void OnPaint(PaintEventArgs e) {
       Graphics g = e.Graphics;
       GraphicsPath gp = new GraphicsPath();
       gp.AddLine(10, 10, 110, 15);
       gp.AddLine(110, 15, 100, 96);
       gp.AddLine(100, 96, 15, 110);
       gp.CloseFigure();
       g.FillRectangle(Brushes.White, this.ClientRectangle);
       g.SmoothingMode = SmoothingMode.AntiAlias;
       PathGradientBrush pgb = new PathGradientBrush(gp);
       pgb.CenterColor = Color.White;
       pgb.SurroundColors = new Color[] { Color.Blue };
       g.FillPath(pgb, gp);
       g.DrawPath(Pens.Black, gp);
       pgb.Dispose();
       gp.Dispose();
   }
   public static void Main() {
       Application.Run(new Form1());
   }

}

 </source>