в 17:44, 31 мая 2010

2010-05-31T17:44:26Z

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2010-05-31T15:24:33Z

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== Arc2D Chord ==



<source lang="java">
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Arc2D;
import javax.swing.JComponent;
import javax.swing.JFrame;
class MyCanvas extends JComponent {
public void paint(Graphics g) {
Graphics2D g2 = (Graphics2D)g;

//Draw the chord

Arc2D.Float arc1 = new Arc2D.Float(Arc2D.CHORD);
arc1.setFrame(140,30, 67, 46);
arc1.setAngleStart(45);
arc1.setAngleExtent(270);
g2.setColor(Color.blue);
g2.draw(arc1);
g2.setColor(Color.gray);
g2.fill(arc1);
g2.setColor(Color.black);
g2.drawString("Arc2D.CHORD", 140, 20);
}
}
public class Graphics2DDrawArcChord {
public static void main(String[] a) {
JFrame window = new JFrame();
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
window.setBounds(30, 30, 300, 300);
window.getContentPane().add(new MyCanvas());
window.setVisible(true);
}
}</source>



== Arc2D OPEN ==



<source lang="java">
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Arc2D;
import javax.swing.JComponent;
import javax.swing.JFrame;
class MyCanvas extends JComponent {
public void paint(Graphics g) {
Graphics2D g2 = (Graphics2D)g;

//Draw the open arc
Arc2D.Float arc = new Arc2D.Float(Arc2D.OPEN);
arc.setFrame(140,100, 67, 46);
arc.setAngleStart(45);
arc.setAngleExtent(270);
g2.setColor(Color.gray);
g2.draw(arc);
g2.setColor(Color.green);
g2.fill(arc);
g2.setColor(Color.black);
g2.drawString("Arc2D.OPEN", 140, 90);
}
}
public class Graphics2DDrawArcOPEN {
public static void main(String[] a) {
JFrame window = new JFrame();
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
window.setBounds(30, 30, 300, 300);
window.getContentPane().add(new MyCanvas());
window.setVisible(true);
}
}</source>



== Arc2D PIE ==



<source lang="java">
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Arc2D;
import javax.swing.JComponent;
import javax.swing.JFrame;
class MyCanvas extends JComponent {
public void paint(Graphics g) {
Graphics2D g2 = (Graphics2D) g;
// Draw the pie chart
Arc2D.Float arc = new Arc2D.Float(Arc2D.PIE);
arc.setFrame(140, 200, 67, 46);
arc.setAngleStart(45);
arc.setAngleExtent(270);
g2.setColor(Color.gray);
g2.draw(arc);
g2.setColor(Color.red);
g2.fill(arc);
g2.setColor(Color.black);
g2.drawString("Arc2D.PIE", 140, 190);
}
}
public class Graphics2DDrawArcPIE {
public static void main(String[] a) {
JFrame window = new JFrame();
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
window.setBounds(30, 30, 300, 300);
window.getContentPane().add(new MyCanvas());
window.setVisible(true);
}
}</source>



== Compares two arcs and returns true if they are equal or both null. ==



<source lang="java">
import java.awt.geom.Arc2D;
public class Main {

/**
* Compares two arcs and returns <code>true</code> if they are equal or
* both <code>null</code>.
*
* @param a1 the first arc (<code>null</code> permitted).
* @param a2 the second arc (<code>null</code> permitted).
*
* @return A boolean.
*/
public static boolean equal(final Arc2D a1, final Arc2D a2) {
if (a1 == null) {
return (a2 == null);
}
if (a2 == null) {
return false;
}
if (!a1.getFrame().equals(a2.getFrame())) {
return false;
}
if (a1.getAngleStart() != a2.getAngleStart()) {
return false;
}
if (a1.getAngleExtent() != a2.getAngleExtent()) {
return false;
}
if (a1.getArcType() != a2.getArcType()) {
return false;
}
return true;
}
}</source>



== Draw Arc ==



<source lang="java">
import java.awt.Graphics;
import javax.swing.JComponent;
import javax.swing.JFrame;
class MyCanvas extends JComponent {
public void paint(Graphics g) {
g.drawArc (10, 10, 200, 200,50,50);
}
}
public class DrawArc {
public static void main(String[] a) {
JFrame window = new JFrame();
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
window.setBounds(30, 30, 300, 300);
window.getContentPane().add(new MyCanvas());
window.setVisible(true);
}
}</source>



== Drawing a Pie Chart ==



<source lang="java">
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import javax.swing.JComponent;
import javax.swing.JFrame;
class Slice {
double value;
Color color;
public Slice(double value, Color color) {
this.value = value;
this.color = color;
}
}
class MyComponent extends JComponent {
Slice[] slices = { new Slice(5, Color.black), new Slice(33, Color.green),
new Slice(20, Color.yellow), new Slice(15, Color.red) };
MyComponent() {
}
public void paint(Graphics g) {
drawPie((Graphics2D) g, getBounds(), slices);
}
void drawPie(Graphics2D g, Rectangle area, Slice[] slices) {
double total = 0.0D;
for (int i = 0; i < slices.length; i++) {
total += slices[i].value;
}
double curValue = 0.0D;
int startAngle = 0;
for (int i = 0; i < slices.length; i++) {
startAngle = (int) (curValue * 360 / total);
int arcAngle = (int) (slices[i].value * 360 / total);
g.setColor(slices[i].color);
g.fillArc(area.x, area.y, area.width, area.height, startAngle, arcAngle);
curValue += slices[i].value;
}
}
}
public class PieChart {
public static void main(String[] argv) {
JFrame frame = new JFrame();
frame.getContentPane().add(new MyComponent());
frame.setSize(300, 200);
frame.setVisible(true);
}
}</source>



== Fill Arc ==



<source lang="java">
import java.awt.Color;
import java.awt.Graphics;
import javax.swing.JComponent;
import javax.swing.JFrame;
class MyCanvas extends JComponent {
public void paint(Graphics g) {
g.setColor(Color.RED);
g.fillArc(20, 20, 200, 200,200,200);
}
}
public class FillArc {
public static void main(String[] a) {
JFrame window = new JFrame();
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
window.setBounds(30, 30, 300, 300);
window.getContentPane().add(new MyCanvas());
window.setVisible(true);
}
}</source>

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в 17:44, 31 мая 2010

Admin: 1 версия