Csharp/C Sharp/2D Graphics/Path — различия между версиями
Admin (обсуждение | вклад) м (1 версия) |
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(нет различий)
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Версия 18:31, 26 мая 2010
Содержание
- 1 Add a rectangle to a Path
- 2 Add Bezier to a Path
- 3 Add closed figures to GraphicsPath
- 4 Add Ellipse to path
- 5 Add Line and Arc to Path
- 6 Add lines to Path
- 7 Close all figures
- 8 Create Path from String
- 9 Draw path
- 10 Fill path and draw path
- 11 Fillpath Demo
- 12 GraphicsPath closes a figure and starts a new figure
- 13 Graphics Path Example
- 14 GraphicsPath starts a new figure
- 15 GraphicsPath starts two figures and close them
- 16 Is click inside a path
- 17 Scribble with Path
- 18 Start A Figure
- 19 Widen a Path
Add a rectangle to a Path
<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;
g.FillRectangle(Brushes.White, this.ClientRectangle);
GraphicsPath gp = new GraphicsPath();
gp.AddRectangle(new Rectangle(10, 50, 80, 20));
gp.AddEllipse(50, 10, 20, 80);
g.DrawPath(Pens.Black, gp);
gp.Dispose();
}
public static void Main() {
Application.Run(new Form1());
}
}
</source>
Add Bezier to a Path
<source lang="csharp">
using System; using System.Drawing; using System.Drawing.Drawing2D; using System.Windows.Forms;
class Flower: Form {
public static void Main()
{
Application.Run(new Flower());
}
public Flower()
{
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 fScale = Math.Min(cx, cy) / 200f;
grfx.TranslateTransform(cx / 2, cy / 2);
grfx.ScaleTransform(fScale, fScale);
GraphicsPath path = new GraphicsPath();
path.AddBezier(new Point( 0, 0), new Point(125, 125),
new Point(75, 15), new Point(600, 0));
for (int i = 0; i < 8; i++)
{
grfx.FillPath(Brushes.Red, path);
grfx.DrawPath(Pens.Black, path);
grfx.RotateTransform(360 / 8);
}
Rectangle rect = new Rectangle(-150, -150, 300, 300);
grfx.FillEllipse(Brushes.Yellow, rect);
grfx.DrawEllipse(Pens.Black, rect);
}
}
</source>
Add closed figures to GraphicsPath
<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;
using System.Drawing.Imaging;
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;
g.FillRectangle(Brushes.White, this.ClientRectangle);
GraphicsPath gp = new GraphicsPath();
// Create a figure
gp.AddRectangle(new Rectangle(10, 50, 80, 20));
// Create another figure
gp.AddEllipse(50, 10, 20, 80);
g.DrawPath(Pens.Black, gp);
gp.Dispose();
}
private void Form1_Resize(object sender, System.EventArgs e)
{
Invalidate();
}
}
</source>
Add Ellipse to path
<source lang="csharp">
using System; using System.Drawing; using System.Drawing.Drawing2D; using System.Windows.Forms;
class Clover: Form {
public static void Main()
{
Application.Run(new Clover());
}
public Clover()
{
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)
{
GraphicsPath path = new GraphicsPath();
path.AddEllipse(0, cy / 3, cx / 2, cy / 3); // Left
grfx.SetClip(path);
grfx.TranslateTransform(cx / 2, cy / 2);
Pen pen = new Pen(clr);
float fRadius = (float) Math.Sqrt(Math.Pow(cx / 2, 2) +
Math.Pow(cy / 2, 2));
for (float fAngle = 0; fAngle < (float) Math.PI * 2;
fAngle += (float) Math.PI / 180)
{
grfx.DrawLine(pen, 0, 0, fRadius * (float) Math.Cos(fAngle),
-fRadius * (float) Math.Sin(fAngle));
}
}
}
</source>
Add Line and Arc to Path
<source lang="csharp"> using System; using System.Drawing; using System.Drawing.Drawing2D; using System.Windows.Forms;
class LineArcPath: Form {
public static void Main()
{
Application.Run(new LineArcPath());
}
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)
{
GraphicsPath path = new GraphicsPath();
Pen pen = new Pen(clr, 25);
path.AddLine( 25, 100, 125, 100);
path.AddArc (125, 50, 100, 100, -180, 180);
path.AddLine(225, 100, 325, 100);
grfx.DrawPath(pen, path);
}
}
</source>
Add lines to Path
<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;
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 = "Pen Cap App";
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;
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.DrawPath(Pens.Black, gp);
gp.Dispose();
}
private void Form1_Resize(object sender, System.EventArgs e)
{
Invalidate();
}
}
</source>
Close all figures
<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;
g.FillRectangle(Brushes.White, this.ClientRectangle);
GraphicsPath gp = new GraphicsPath();
gp.AddLine(10, 10, 10, 50);
gp.AddBezier(10, 50, 10, 55, 25, 70, 30, 70);
gp.AddLine(30, 70, 60, 70);
gp.StartFigure();
gp.AddLine(60, 110, 40, 160);
gp.CloseAllFigures();
g.DrawPath(Pens.Black, gp);
gp.Dispose();
}
public static void Main() {
Application.Run(new Form1());
}
}
</source>
Create Path from String
<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;
using System.Drawing.Imaging;
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;
g.FillRectangle(Brushes.White, this.ClientRectangle);
GraphicsPath gp = new GraphicsPath();
gp.AddString("www.nfex.ru", new FontFamily("Times New Roman"),
(int)(FontStyle.Bold | FontStyle.Italic),
144, new Point(5, 5), StringFormat.GenericTypographic);
g.SetClip(gp);
g.DrawImage(new Bitmap("winter.jpg"), this.ClientRectangle);
gp.Dispose();
}
private void Form1_Resize(object sender, System.EventArgs e)
{
Invalidate();
}
}
</source>
Draw path
<source lang="csharp"> 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();
}
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
protected override void OnPaint (PaintEventArgs e) {
GraphicsPath path;
path = new GraphicsPath(new Point[]{ new Point(10, 10),
new Point(50, 10),
new Point(20, 150),
new Point(10, 50),
new Point(200, 160)},
new byte[] {(byte)PathPointType.Start,
(byte)PathPointType.Line,
(byte)PathPointType.Line,
(byte)PathPointType.Line,
(byte)PathPointType.Line });
e.Graphics.DrawPath(Pens.Black, path);
}
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());
}
}
</source>
Fill path and draw path
<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;
using System.Drawing.Imaging;
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;
g.FillRectangle(Brushes.White, this.ClientRectangle);
GraphicsPath gp = new GraphicsPath();
// Create an open figure
gp.AddLine(10, 10, 10, 50);
gp.AddLine(10, 50, 50, 50);
// Start a new figure
gp.StartFigure();
gp.AddLine(60, 10, 60, 50);
gp.AddLine(60, 50, 100, 50);
gp.AddLine(100, 50, 100, 10);
gp.CloseFigure();
gp.AddEllipse(new Rectangle(110, 10, 40, 40));
g.FillPath(Brushes.Orange, gp);
g.DrawPath(Pens.Black, gp);
gp.Dispose();
}
private void Form1_Resize(object sender, System.EventArgs e)
{
Invalidate();
}
}
</source>
Fillpath Demo
<source lang="csharp">
using System; using System.Drawing; using System.Drawing.Imaging; using System.Drawing.Drawing2D; using System.Collections; using System.ruponentModel; using System.Windows.Forms; using System.Data; public class TestGDI2 : 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);
Graphics g = pe.Graphics;
g.FillRectangle(new SolidBrush(Color.White), ClientRectangle);
GraphicsPath path = new GraphicsPath(new Point[] {
new Point(40, 140), new Point(275, 200),
new Point(105, 225), new Point(190, 300),
new Point(50, 350), new Point(20, 180), },
new byte[] {
(byte)PathPointType.Start,
(byte)PathPointType.Bezier,
(byte)PathPointType.Bezier,
(byte)PathPointType.Bezier,
(byte)PathPointType.Line,
(byte)PathPointType.Line,
});
PathGradientBrush pgb = new PathGradientBrush(path);
pgb.SurroundColors = new Color[] { Color.Green,Color.Yellow,Color.Red,
Color.Blue,Color.Orange, Color.White,
};
g.FillPath(pgb, path);
}
public static void Main() {
System.Windows.Forms.Application.Run(new TestGDI2());//display form
}
}
</source>
GraphicsPath closes a figure and starts a new figure
<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;
using System.Drawing.Imaging;
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;
g.FillRectangle(Brushes.White, this.ClientRectangle);
GraphicsPath gp = new GraphicsPath();
// Create a figure
gp.AddLine(10, 10, 10, 50);
gp.AddBezier(10, 50, 10, 55, 25, 70, 30, 70);
gp.AddLine(30, 70, 60, 70);
gp.CloseFigure();
gp.StartFigure();
gp.AddLine(60, 110, 40, 160);
g.DrawPath(Pens.Black, gp);
gp.Dispose();
}
private void Form1_Resize(object sender, System.EventArgs e)
{
Invalidate();
}
}
</source>
Graphics Path Example
<source lang="csharp"> /* 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.ruponentModel; using System.Windows.Forms; using System.Drawing.Drawing2D; namespace GDI_Basics {
/// <summary>
/// Summary description for GraphicsPathExample.
/// </summary>
public class GraphicsPathExample : System.Windows.Forms.Form
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ruponentModel.Container components = null;
public GraphicsPathExample()
{
//
// 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()
{
//
// GraphicsPathExample
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(292, 266);
this.Name = "GraphicsPathExample";
this.Text = "GraphicsPathExample";
this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.GraphicsPathExample_MouseDown);
this.Paint += new System.Windows.Forms.PaintEventHandler(this.GraphicsPathExample_Paint);
}
#endregion
[STAThread]
static void Main()
{
Application.Run(new GraphicsPathExample());
}
GraphicsPath path;
private void GraphicsPathExample_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{
e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
path = new GraphicsPath();
path.StartFigure();
path.AddArc(10, 10, 100, 100, 20, 50);
path.AddLine(20, 50, 70, 230);
path.CloseFigure();
path.AddEllipse(120, 50, 80, 80);
e.Graphics.FillPath(Brushes.White, path);
e.Graphics.DrawPath(Pens.Black, path);
}
private void GraphicsPathExample_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
if (path.IsVisible(e.X, e.Y))
{
MessageBox.Show("You clicked inside the figure.");
}
}
}
}
</source>
GraphicsPath starts a new figure
<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;
using System.Drawing.Imaging;
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;
g.FillRectangle(Brushes.White, this.ClientRectangle);
GraphicsPath gp = new GraphicsPath();
// Create a figure
gp.AddLine(10, 10, 10, 50);
gp.AddBezier(10, 50, 130, 55, 25, 70, 30, 70);
gp.AddLine(30, 70, 60, 70);
gp.AddBezier(60, 70, 555, 70, 90, 55, 90, 50);
gp.AddLine(90, 50, 90, 30);
// Create another figure
gp.StartFigure();
gp.AddLine(60, 110, 40, 160);
gp.AddLine(40, 160, 60, 180);
g.DrawPath(Pens.Black, gp);
gp.Dispose();
}
private void Form1_Resize(object sender, System.EventArgs e)
{
Invalidate();
}
}
</source>
GraphicsPath starts two figures and close them
<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;
using System.Drawing.Imaging;
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;
g.FillRectangle(Brushes.White, this.ClientRectangle);
GraphicsPath gp = new GraphicsPath();
// Create a figure
gp.AddLine(10, 10, 10, 50);
gp.AddBezier(10, 50, 100, 55, 25, 70, 30, 70);
gp.AddLine(30, 70, 60, 70);
// Create another figure
gp.StartFigure();
gp.AddLine(60, 110, 40, 160);
gp.AddLine(40, 160, 60, 180);
// Close all figures
gp.CloseAllFigures();
// Draw the path
g.DrawPath(Pens.Black, gp);
gp.Dispose();
}
private void Form1_Resize(object sender, System.EventArgs e)
{
Invalidate();
}
}
</source>
Is click inside a 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 {
GraphicsPath path;
public Form1() {
InitializeComponent();
}
private void GraphicsPathHit_Paint(object sender, PaintEventArgs e)
{
e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
path = new GraphicsPath();
path.StartFigure();
path.AddArc(10, 10, 100, 100, 20, 50);
path.AddLine(20, 50, 70, 230);
path.CloseFigure();
path.AddEllipse(120, 50, 80, 80);
e.Graphics.FillPath(Brushes.White, path);
e.Graphics.DrawPath(Pens.Black, path);
}
private void GraphicsPathHit_MouseDown(object sender, MouseEventArgs e)
{
if (path.IsVisible(e.X, e.Y))
{
MessageBox.Show("You clicked inside the figure.");
}
}
private void InitializeComponent()
{
this.SuspendLayout();
//
// GraphicsPathHit
//
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 = "GraphicsPathHit";
this.Text = "GraphicsPathHit";
this.Paint += new System.Windows.Forms.PaintEventHandler(this.GraphicsPathHit_Paint);
this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.GraphicsPathHit_MouseDown);
this.ResumeLayout(false);
}
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.Run(new Form1());
}
}
</source>
Scribble with Path
<source lang="csharp"> using System; using System.Drawing; using System.Drawing.Drawing2D; using System.Windows.Forms;
class ScribbleWithPath: Form {
GraphicsPath path= new GraphicsPath();
bool bTracking;
Point ptLast;
public static void Main()
{
Application.Run(new ScribbleWithPath());
}
protected override void OnMouseDown(MouseEventArgs mea)
{
if (mea.Button != MouseButtons.Left)
return;
ptLast = new Point(mea.X, mea.Y);
bTracking = true;
path.StartFigure();
}
protected override void OnMouseMove(MouseEventArgs mea)
{
if (!bTracking)
return;
Point ptNew = new Point(mea.X, mea.Y);
Graphics grfx = CreateGraphics();
grfx.DrawLine(new Pen(ForeColor), ptLast, ptNew);
grfx.Dispose();
path.AddLine(ptLast, ptNew);
ptLast = ptNew;
}
protected override void OnMouseUp(MouseEventArgs mea)
{
bTracking = false;
}
protected override void OnPaint(PaintEventArgs pea)
{
pea.Graphics.DrawPath(new Pen(ForeColor), path);
}
}
</source>
Start A Figure
<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;
g.FillRectangle(Brushes.White, this.ClientRectangle);
GraphicsPath gp = new GraphicsPath();
gp.AddLine(10, 10, 10, 50);
gp.AddBezier(10, 50, 10, 55, 25, 70, 30, 70);
gp.StartFigure();
gp.AddLine(60, 110, 40, 160);
g.DrawPath(Pens.Black, gp);
gp.Dispose();
}
public static void Main() {
Application.Run(new Form1());
}
}
</source>
Widen a Path
<source lang="csharp"> using System; using System.Drawing; using System.Drawing.Drawing2D; using System.Windows.Forms;
class WidenPath: Form {
GraphicsPath path= new GraphicsPath();
public static void Main()
{
Application.Run(new WidenPath());
}
public WidenPath()
{
ResizeRedraw = true;
path.AddLines(new Point[] { new Point(20, 10),
new Point(50, 50),
new Point(80, 10) });
path.AddPolygon(new Point[] { new Point(20, 30),
new Point(50, 70),
new Point(80, 30) });
}
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.ScaleTransform(cx / 300f, cy / 200f);
for (int i = 0; i < 6; i++)
{
GraphicsPath pathClone = (GraphicsPath) path.Clone();
Matrix matrix = new Matrix();
Pen penThin = new Pen(clr, 1);
Pen penThick = new Pen(clr, 5);
Pen penWiden = new Pen(clr, 7.5f);
Brush brush = new SolidBrush(clr);
matrix.Translate((i % 3) * 100, (i / 3) * 100);
if (i < 3)
pathClone.Transform(matrix);
else
pathClone.Widen(penWiden, matrix);
switch (i % 3)
{
case 0: grfx.DrawPath(penThin, pathClone); break;
case 1: grfx.DrawPath(penThick, pathClone); break;
case 2: grfx.FillPath(brush, pathClone); break;
}
}
}
}
</source>
