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How to draw Arc on a Canvas |
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This example shows how to draw Arc on a Canvas.
/*
J2ME: The Complete Reference
James Keogh
Publisher: McGraw-Hill
ISBN 0072227109
*/
//jad file (please verify the jar size)
/*
MIDlet-Name: ArcExampleMIDlet
MIDlet-Version: 1.0
MIDlet-Vendor: MyCompany
MIDlet-Jar-URL: ArcExampleMIDlet.jar
MIDlet-1: ArcExampleMIDlet, , ArcExampleMIDlet
MicroEdition-Configuration: CLDC-1.0
MicroEdition-Profile: MIDP-1.0
MIDlet-JAR-SIZE: 100
*/
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class ArcExampleMIDlet extends MIDlet
{
private Display display;
private MyCanvas canvas;
public ArcExampleMIDlet()
{
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 ArcExampleMIDlet arcExample;
public MyCanvas (ArcExampleMIDlet 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();
}
}
}
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