Csharp/C Sharp/2D Graphics/Region
Содержание
- 1 Create a Region whose boundary is the GraphicsPath
- 2 Fill a Region
- 3 Fill region
- 4 Get Clipping region painted
- 5 Get repainted regions
- 6 Is a point visible to a Region
- 7 Is Region Empty
- 8 Is Region finite
- 9 Is this Rectangle visible to the Region
- 10 Region Clips
- 11 Region clips a text path
- 12 Region Excludes
- 13 Region Unions
Create a Region whose boundary is the 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 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.CloseFigure();
gp.AddEllipse(new Rectangle(110, 10, 40, 40));
// Create a Region whose boundary is the above GraphicsPath
Region reg = new Region(gp);
g.FillRegion(Brushes.Green, reg);
reg.Dispose();
gp.Dispose();
}
private void Form1_Resize(object sender, System.EventArgs e)
{
Invalidate();
}
}
</source>
Fill a Region
<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.AddLine(10, 10, 10, 50);
gp.AddBezier(10, 50, 120, 55, 25, 70, 30, 70);
gp.AddLine(30, 70, 60, 70);
gp.AddBezier(60, 70, 305, 70, 90, 55, 90, 50);
gp.AddLine(90, 50, 90, 30);
gp.StartFigure();
gp.AddLine(60, 110, 40, 160);
gp.AddLine(40, 160, 60, 180);
// Create a Region whose boundary is the above GraphicsPath
Region reg = new Region(gp);
g.FillRegion(Brushes.Green, reg);
reg.Dispose();
gp.Dispose();
}
private void Form1_Resize(object sender, System.EventArgs e)
{
Invalidate();
}
}
</source>
Fill region
<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) {
Rectangle r1 = new Rectangle(10, 10, 50, 50);
Rectangle r2 = new Rectangle(40, 40, 50, 50);
Region r = new Region(r1);
r.Union(r2);
GraphicsPath path = new GraphicsPath(new Point[] {new Point(45, 45),
new Point(145, 55),
new Point(200, 150),
new Point(75, 150),
new Point(45, 45)
}, new byte[] { (byte)PathPointType.Start,
(byte)PathPointType.Bezier,
(byte)PathPointType.Bezier,
(byte)PathPointType.Bezier,
(byte)PathPointType.Line
});
r.Union(path);
e.Graphics.FillRegion(Brushes.Blue, r);
}
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>
Get Clipping region painted
<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);
String s = "Create the necessary objects to draw the text string";
Font f = new Font("Times New Roman", 12);
SizeF sf = g.MeasureString(s, f, 100);
RectangleF rf = new RectangleF(10, 10, sf.Width, sf.Height);
g.DrawString(s, f, Brushes.Black, rf);
f.Dispose();
Console.WriteLine("Clipping region painted: " + e.ClipRectangle);
}
private void Form1_Resize(object sender, System.EventArgs e)
{
Invalidate();
}
}
</source>
Get repainted regions
<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);
SizeF sizeF = g.MeasureString("AA", this.Font);
StringFormat sf = new StringFormat();
sf.LineAlignment = StringAlignment.Center;
// Set properties of the grid
int cellHeight = (int)sizeF.Height + 200;
int cellWidth = 200;
int nbrColumns = 50;
int nbrRows = 50;
// Output general info to console
Console.WriteLine("-------------------------------------------");
Console.WriteLine("e.ClipRectangle = " + e.ClipRectangle);
Console.WriteLine("The following cells need to be redrawn " +
"(in whole or in part):");
// Draw the cells and the output to console
for (int row = 0; row < nbrRows; ++row)
{
for (int col = 0; col < nbrColumns; ++col)
{
Point cellLocation = new Point(col * cellWidth,
row * cellHeight);
Rectangle cellRect = new Rectangle(cellLocation.X,
cellLocation.Y,
cellWidth, cellHeight);
if (cellRect.IntersectsWith(e.ClipRectangle))
{
Console.WriteLine("Row:{0} Col:{1}", row, col);
g.FillRectangle(Brushes.White, cellRect);
g.DrawRectangle(Pens.Black, cellRect);
String s = String.Format("{0},{1}", col, row);
g.DrawString(s, this.Font, Brushes.Black, cellRect, sf);
}
}
}
}
private void Form1_Resize(object sender, System.EventArgs e)
{
Invalidate();
}
}
</source>
Is a point visible to a Region
<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);
Region r = new Region(new Rectangle(30, 30, 30, 60));
r.Exclude(new Rectangle(40, 40, 10, 10));
g.FillRegion(Brushes.Orange, r);
PointF pf = new PointF(35.0f, 30.0f);
Console.WriteLine((r.IsVisible(pf) ? " - includes"
: " - excludes")
+ " the point (35.0, 50.0)");
r.Dispose();
}
private void Form1_Resize(object sender, System.EventArgs e)
{
Invalidate();
}
}
</source>
Is Region Empty
<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);
Region r = new Region(new Rectangle(30, 30, 30, 60));
r.Exclude(new Rectangle(40, 40, 10, 10));
g.FillRegion(Brushes.Orange, r);
Console.WriteLine(r.IsEmpty(g) ? " - is empty"
: " - is non-empty");
r.Dispose();
}
private void Form1_Resize(object sender, System.EventArgs e)
{
Invalidate();
}
}
</source>
Is Region finite
<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);
Region r = new Region(new Rectangle(30, 30, 30, 60));
r.Exclude(new Rectangle(40, 40, 10, 10));
g.FillRegion(Brushes.Orange, r);
Console.WriteLine(r.IsInfinite(g) ? " - is infinite"
: " - is finite");
r.Dispose();
}
private void Form1_Resize(object sender, System.EventArgs e)
{
Invalidate();
}
}
</source>
Is this Rectangle visible to the Region
<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);
Region r = new Region(new Rectangle(30, 30, 30, 60));
r.Exclude(new Rectangle(40, 40, 10, 10));
g.FillRegion(Brushes.Orange, r);
Rectangle rect = new Rectangle(25, 65, 5, 5);
g.DrawRectangle(Pens.Black, rect);
Console.WriteLine((r.IsVisible(rect) ? " - is visible"
: " - is invisible")
+ " in the rectangle shown");
r.Dispose();
}
private void Form1_Resize(object sender, System.EventArgs e)
{
Invalidate();
}
}
</source>
Region Clips
<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);
Rectangle rect = new Rectangle(10, 10, 80, 80);
g.DrawRectangle(Pens.Black, rect);
g.SetClip(rect);
g.FillEllipse(Brushes.Blue, 20, 20, 100, 100);
}
private void Form1_Resize(object sender, System.EventArgs e)
{
Invalidate();
}
}
</source>
Region clips a text 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();
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>
Region Excludes
<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);
Region r = new Region(new Rectangle(30, 30, 30, 60));
r.Exclude(new Rectangle(40, 40, 10, 10));
g.FillRegion(Brushes.Orange, r);
r.Dispose();
}
private void Form1_Resize(object sender, System.EventArgs e)
{
Invalidate();
}
}
</source>
Region Unions
<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);
Region reg = new Region();
reg.MakeEmpty();
GraphicsPath gp = new GraphicsPath();
gp.AddEllipse(10, 10, 50, 50);
reg.Union(gp);
gp.Reset();
gp.AddLine(40, 40, 70, 10);
gp.AddLine(70, 10, 140, 140);
gp.CloseFigure();
reg.Union(gp);
reg.Union(new Rectangle(40, 50, 60, 60));
// Set the clipping region
g.SetClip(reg, CombineMode.Replace);
g.FillRectangle(Brushes.Green, this.ClientRectangle);
gp.Dispose();
reg.Dispose();
}
private void Form1_Resize(object sender, System.EventArgs e)
{
Invalidate();
}
}
</source>
