Csharp/CSharp Tutorial/2D/Graphics
Содержание
Create Graphics from Form object
<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms;
class Scribble: Form {
bool bTracking;
Point ptLast;
public static void Main()
{
Application.Run(new Scribble());
}
public Scribble()
{
Text = "Scribble";
}
protected override void OnMouseDown(MouseEventArgs mea)
{
if (mea.Button != MouseButtons.Left)
return;
ptLast = new Point(mea.X, mea.Y);
bTracking = true;
}
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();
ptLast = ptNew;
}
protected override void OnMouseUp(MouseEventArgs mea)
{
bTracking = false;
}
}</source>
Double Buffering Example
<source lang="csharp">using System; using System.Collections.Generic; using System.ruponentModel; using System.Data; using System.Drawing; using System.Windows.Forms;
class Form1 : Form
{
public Form1()
{
}
protected override void OnPaint(PaintEventArgs e)
{
Graphics displayGraphics = e.Graphics;
Random r = new Random();
Image i = new Bitmap(ClientRectangle.Width, ClientRectangle.Height);
Graphics g = Graphics.FromImage(i);
g.FillRectangle(Brushes.White, ClientRectangle);
for (int x = 0; x < ClientRectangle.Width; x++)
{
for (int y = 0; y < ClientRectangle.Height; y += 10)
{
Color c = Color.FromArgb(r.Next(255), r.Next(255),r.Next(255));
Pen p = new Pen(c, 1);
g.DrawLine(p, new Point(0, 0), new Point(x, y));
g.DrawLine(p, new Point(10, 10), new Point(x, y));
g.DrawLine(p, new Point(20, 10), new Point(x, y));
g.DrawLine(p, new Point(30, 10), new Point(x, y));
g.DrawLine(p, new Point(40, 10), new Point(x, y));
g.DrawLine(p, new Point(50, 10), new Point(x, y));
g.DrawLine(p, new Point(60, 10), new Point(x, y));
g.DrawLine(p, new Point(70, 10), new Point(x, y));
g.DrawLine(p, new Point(80, 10), new Point(x, y));
g.DrawLine(p, new Point(90, 10), new Point(x, y));
p.Dispose();
}
}
displayGraphics.DrawImage(i, ClientRectangle);
i.Dispose();
}
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.Run(new Form1());
}
}</source>
Draw along with the Tab
<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; public class Form1 : Form {
protected override void OnPaint(PaintEventArgs e) {
Graphics g = e.Graphics;
g.FillRectangle(Brushes.White, this.ClientRectangle);
Font f = new Font("Times New Roman", 12);
Font bf = new Font(f, FontStyle.Bold);
StringFormat sf = new StringFormat();
float[] ts = { 10.0f, 70.0f, 100.0f, 90.0f };
sf.SetTabStops(0.0f, ts);
string s1 = "\tA\tAA\tAAA\tAAAA";
string s2 = "\tAAAA\tAAA\tAA\tA";
string s3 = "\tAAAAAAAA\tAAAAAAA\tAAAAAA\tAAAAA\n\tAAAA\tAAA\tAA\tAA";
g.DrawString(s1, bf, Brushes.Black, 20, 20, sf);
g.DrawString(s2, f, Brushes.Blue, 20, 20 + bf.Height, sf);
g.DrawString(s3, f, Brushes.Blue, 20,
20 + bf.Height + f.Height, sf);
f.Dispose();
bf.Dispose();
}
public static void Main() {
Application.Run(new Form1());
}
}</source>
Draw String
<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms; class PaintHello {
public static void Main()
{
Form form = new Form();
form.Text = "Paint Hello";
form.BackColor = Color.White;
form.Paint += new PaintEventHandler(MyPaintHandler);
Application.Run(form);
}
static void MyPaintHandler(object objSender, PaintEventArgs pea)
{
Form form = (Form)objSender;
Graphics graphics = pea.Graphics;
graphics.DrawString("Hello, world!", form.Font, Brushes.Black, 0, 0);
}
}</source>
Graphics.DrawIcon
<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 void Form1_Paint(object sender,
System.Windows.Forms.PaintEventArgs p) {
Graphics g = p.Graphics;
}
private void createManually() {
Graphics g;
g = this.CreateGraphics();
}
private void createFromFile() {
Graphics g;
Bitmap b;
b = new Bitmap("C:\E.bmp");
g = Graphics.FromImage(b);
}
private void drawLine() {
Graphics g;
g = this.CreateGraphics();
Icon i = new Icon(@"C:\Desktop.ico");
g.DrawIcon(i, 150, 15);
}
}</source>
Graphics.DrawImage
<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; public class Form1 : Form {
protected override void OnPaint(PaintEventArgs e) {
Graphics g = e.Graphics;
Bitmap bmp = new Bitmap("rama.jpg");
Rectangle r = new Rectangle(0, 0, bmp.Width, bmp.Height);
g.DrawImage(bmp, r, r, GraphicsUnit.Pixel);
}
public static void Main() {
Application.Run(new Form1());
}
}</source>
Graphics.DrawLine
<source lang="csharp">using System; using System.Drawing; using System.Drawing.Printing; using System.Windows.Forms;
class PrintableForm: Form {
public static void Main()
{
Application.Run(new PrintableForm());
}
public PrintableForm()
{
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)
{
Pen pen = new Pen(clr);
grfx.DrawLine(pen, 0, 0, cx - 1, cy - 1);
grfx.DrawLine(pen, cx - 1, 0, 0, cy - 1);
}
}</source>
Graphics.DrawLines
<source lang="csharp">using System; using System.Drawing; using System.Drawing.Printing; using System.Windows.Forms;
class PrintableForm: Form {
public static void Main()
{
Application.Run(new PrintableForm());
}
public PrintableForm()
{
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)
{
Point[] apt = {new Point(0, 0),
new Point(cx - 1, 0),
new Point(cx - 1, cy - 1),
new Point(0, cy - 1),
new Point(0, 0)};
grfx.DrawLines(new Pen(clr), apt);
}
}</source>
No Double Buffering Example
<source lang="csharp">using System; using System.Collections.Generic; using System.ruponentModel; using System.Data; using System.Drawing; using System.Windows.Forms;
class Form1 : Form
{
public Form1()
{
}
protected override void OnPaint(PaintEventArgs e)
{
Graphics g = e.Graphics;
Random r = new Random();
g.FillRectangle(Brushes.White, ClientRectangle);
for (int x = 0; x < ClientRectangle.Width; x++)
{
for (int y = 0; y < ClientRectangle.Height; y += 10)
{
Color c = Color.FromArgb(r.Next(255), r.Next(255),r.Next(255));
using (Pen p = new Pen(c, 1))
{
g.DrawLine(p, new Point(0, 0), new Point(x, y));
g.DrawLine(p, new Point(10, 40), new Point(x, y));
g.DrawLine(p, new Point(20, 30), new Point(x, y));
g.DrawLine(p, new Point(30, 20), new Point(x, y));
g.DrawLine(p, new Point(40, 10), new Point(x, y));
g.DrawLine(p, new Point(50, 10), new Point(x, y));
}
}
}
}
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.Run(new Form1());
}
}</source>
Set SmoothingMode
<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.SmoothingMode = SmoothingMode.AntiAlias;
g.FillRectangle(Brushes.White, this.ClientRectangle);
Pen p = new Pen(Color.Black, 10);
p.StartCap = LineCap.Round;
p.EndCap = LineCap.ArrowAnchor;
g.DrawLine(p, 30, 30, 80, 30);
p.Dispose();
}
public static void Main() {
Application.Run(new Form1());
}
}</source>
TranslateTransform a Graphics
<source lang="csharp">using System.Collections.Generic; using System.ruponentModel; using System.Data; using System.Drawing; 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);
Font f = new Font("Times New Roman", 24);
g.DrawString("Translation", f, Brushes.Black, 0, 0);
g.TranslateTransform(150, 75);
g.DrawString("Translation", f, Brushes.Black, 0, 0);
}
public static void Main() {
Application.Run(new Form1());
}
}</source>
