using System; using System.Drawing; using System.Drawing.Drawing2D; using System.Windows.Forms; class KeyholeClip: Form { protected Image image; protected GraphicsPath path; public static void Main() { Application.Run(new KeyholeClip()); } public KeyholeClip() { ResizeRedraw = true; image = Image.FromFile("Color.jpg"); path = new GraphicsPath(); path.AddArc(80, 0, 80, 80, 45, -270); path.AddLine(70, 180, 170, 180); } protected override void OnPaint(PaintEventArgs pea) { pea.Graphics.SetClip(path); pea.Graphics.DrawImage(image, 0, 0, image.Width, image.Height); } }
Graphics: TranslateClip
using System; using System.Drawing; using System.Drawing.Drawing2D; using System.Windows.Forms; class KeyholeClipCentered : Form { GraphicsPath path = new GraphicsPath(); Image image = Image.FromFile("Color.jpg"); public static void Main() { Application.Run(new KeyholeClipCentered()); } public KeyholeClipCentered() { ResizeRedraw = true; path.AddArc(80, 0, 80, 80, 45, -270); path.AddLine(70, 180, 170, 180); } 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) { grfx.SetClip(path); RectangleF rectf = path.GetBounds(); int xOffset = (int)((cx - rectf.Width) / 2 - rectf.X); int yOffset = (int)((cy - rectf.Height) / 2 - rectf.Y); grfx.TranslateClip(xOffset, yOffset); grfx.DrawImage(image, xOffset, yOffset, image.Width, image.Height); } }
Graphics Unit: Millimeter
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(); SetStyle(ControlStyles.ResizeRedraw, true); } private void InitializeComponent() { this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.ClientSize = new System.Drawing.Size(400, 400); this.Text = ""; 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; // Set quality of rendering. g.SmoothingMode = SmoothingMode.AntiAlias; // Configure graphics unit. g.PageUnit = GraphicsUnit.Millimeter; Point renderingOrgPt = new Point(0,0); renderingOrgPt.X = 100; renderingOrgPt.Y = 100; // Configure origin. g.TranslateTransform(renderingOrgPt.X, renderingOrgPt.Y); g.DrawRectangle(new Pen(Color.Red, 1), 0, 0, 100, 100); g.Dispose(); } }
Graphics Unit: Display
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(); SetStyle(ControlStyles.ResizeRedraw, true); } private void InitializeComponent() { this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.ClientSize = new System.Drawing.Size(400, 400); this.Text = ""; 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; // Set quality of rendering. g.SmoothingMode = SmoothingMode.AntiAlias; // Configure graphics unit. g.PageUnit = GraphicsUnit.Display; Point renderingOrgPt = new Point(0,0); renderingOrgPt.X = 100; renderingOrgPt.Y = 100; // Configure origin. g.TranslateTransform(renderingOrgPt.X, renderingOrgPt.Y); g.DrawRectangle(new Pen(Color.Red, 1), 0, 0, 100, 100); g.Dispose(); } }
Graphics Unit: Document
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(); SetStyle(ControlStyles.ResizeRedraw, true); } private void InitializeComponent() { this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.ClientSize = new System.Drawing.Size(400, 400); this.Text = ""; 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; // Set quality of rendering. g.SmoothingMode = SmoothingMode.AntiAlias; // Configure graphics unit. g.PageUnit = GraphicsUnit.Document; Point renderingOrgPt = new Point(0,0); renderingOrgPt.X = 100; renderingOrgPt.Y = 100; // Configure origin. g.TranslateTransform(renderingOrgPt.X, renderingOrgPt.Y); g.DrawRectangle(new Pen(Color.Red, 1), 0, 0, 100, 100); g.Dispose(); } }
Graphics Unit: Point
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(); SetStyle(ControlStyles.ResizeRedraw, true); } private void InitializeComponent() { this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.ClientSize = new System.Drawing.Size(400, 400); this.Text = ""; 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; // Set quality of rendering. g.SmoothingMode = SmoothingMode.AntiAlias; // Configure graphics unit. g.PageUnit = GraphicsUnit.Point; Point renderingOrgPt = new Point(0,0); renderingOrgPt.X = 100; renderingOrgPt.Y = 100; // Configure origin. g.TranslateTransform(renderingOrgPt.X, renderingOrgPt.Y); g.DrawRectangle(new Pen(Color.Red, 1), 0, 0, 100, 100); g.Dispose(); } }
illustrates using a graphics file
/* Mastering Visual C# .NET by Jason Price, Mike Gunderloy Publisher: Sybex; ISBN: 0782129110 */ /* Example21_5.cs illustrates using a graphics file */ 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_5 : System.Windows.Forms.Form { private System.ComponentModel.Container components = null; public Example21_5() { 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_5"; this.Text = "Example21_5"; this.Paint += new System.Windows.Forms. PaintEventHandler(this.Example21_5_Paint); } static void Main() { Application.Run(new Example21_5()); } private void Example21_5_Paint( object sender, System.Windows.Forms.PaintEventArgs e) { Graphics g = e.Graphics; // Load the image Bitmap b = new Bitmap("CSharp.tif"); // and display it g.DrawImage(b, 10, 10, 350, 300); } }