Admin: 1 версия

2010-06-01T04:58:05Z

1 версия

в 17:44, 31 мая 2010

2010-05-31T17:44:27Z

Новая страница

== Draw arc ==



<source lang="java">
import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Graphics;
import javax.microedition.midlet.MIDlet;
public class DrawArcGraphicsMIDlet extends MIDlet {
private Display display;
protected void startApp() {
Canvas canvas = new LineCanvas();
display = Display.getDisplay(this);
display.setCurrent(canvas);
}
protected void pauseApp() {
}
protected void destroyApp(boolean unconditional) {
}
}
class LineCanvas extends Canvas {
public void paint(Graphics g) {
int width = getWidth();
int height = getHeight();
g.setColor(0);
g.setStrokeStyle(Graphics.SOLID);
g.drawArc(0, 0, width/2, height/2, 0, 90);

}
}</source>



== Fill an arc, change new color and fill a rectangle ==



<source lang="java">
import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.rumand;
import javax.microedition.lcdui.rumandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Graphics;
import javax.microedition.midlet.MIDlet;
public class J2MEArcExample extends MIDlet {
private Display display;
private MyCanvas canvas;
public J2MEArcExample() {
display = Display.getDisplay(this);
canvas = new MyCanvas(this);
}
protected void startApp() {
display.setCurrent(canvas);
}
protected void pauseApp() {
}
protected void destroyApp(boolean unconditional) {
}
public void exitMIDlet() {
destroyApp(true);
notifyDestroyed();
}
}
class MyCanvas extends Canvas implements CommandListener {
private Command exit;
private J2MEArcExample arcExample;
public MyCanvas(J2MEArcExample arcExample) {
this.arcExample = arcExample;
exit = new Command("Exit", Command.EXIT, 1);
addCommand(exit);
setCommandListener(this);
}
protected void paint(Graphics graphics) {
graphics.setColor(255, 255, 255);
graphics.fillRect(0, 0, getWidth(), getHeight());
graphics.setColor(255, 0, 0);
graphics.drawArc(0, 0, getWidth(), getHeight(), 180, 180);
}
public void commandAction(Command command, Displayable displayable) {
if (command == exit) {
arcExample.exitMIDlet();
}
}
}</source>



== Fill arc ==



<source lang="java">
import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Graphics;
import javax.microedition.midlet.MIDlet;
public class FillArcGraphicsMIDlet extends MIDlet {
private Display display;
protected void startApp() {
Canvas canvas = new LineCanvas();
display = Display.getDisplay(this);
display.setCurrent(canvas);
}
protected void pauseApp() {
}
protected void destroyApp(boolean unconditional) {
}
}
class LineCanvas extends Canvas {
public void paint(Graphics g) {
int width = getWidth();
int height = getHeight();
g.setColor(0);
g.setStrokeStyle(Graphics.SOLID);
g.fillArc(0, 0, width/2, height/2, 0, 90);

}
}</source>



== Pie chart ==



<source lang="java">
import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.rumand;
import javax.microedition.lcdui.rumandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Graphics;
import javax.microedition.midlet.MIDlet;
public class PieChartMIDlet extends MIDlet implements CommandListener {
private Command exitCommand;
public void startApp() {
Display display = Display.getDisplay(this);
int[] data = { 10, 20, 30, 40, 20 };
Displayable d = new PieChartCanvas(data);
exitCommand = new Command("exit", Command.EXIT, 1);
d.addCommand(exitCommand);
d.setCommandListener(this);
display.setCurrent(d);
}
public void pauseApp() {
}
public void destroyApp(boolean unconditional) {
}
public void commandAction(Command c, Displayable s) {
notifyDestroyed();
}
}
class PieChartCanvas extends Canvas {
int[] data;
int colors[] = { 0xFF0000, 0xA9E969, 0x00FFFF, 0xC675EC, 0x008800, 0x00C400 };
public PieChartCanvas(int[] data) {
this.data = data;
}
public void paint(Graphics g) {
int width = this.getWidth();
int height = this.getHeight();
g.setColor(255, 255, 255);
g.fillRect(0, 0, width, height);
int sum = 0;
for (int i = 0; i < data.length; i++) {
sum += data[i];
}
int deltaAngle = 360 * 100 / sum / 100;
int x = 4;
int y = 4;
int diameter;
if (width > height)
diameter = height - y * 2;
else
diameter = width - x * 2;
int startAngle = 0;
for (int i = 0; i < data.length; i++) {
g.setColor(colors[i]);
g.fillArc(x, y, diameter, diameter, startAngle, deltaAngle * data[i]);
startAngle += deltaAngle * data[i];
}
}
}</source>

← Предыдущая	Версия 04:58, 1 июня 2010
(нет различий)

Java Tutorial/J2ME/Arc - История изменений

Admin: 1 версия

в 17:44, 31 мая 2010