Draw arc on a canvas
/*-------------------------------------------------- * Arcs.java * * Draw arc on a canvas * * Example from the book: Core J2ME Technology * Copyright John W. Muchow http://www.CoreJ2ME.com * You may use/modify for any non-commercial purpose *-------------------------------------------------*/ import javax.microedition.midlet.*; import javax.microedition.lcdui.*; public class Arcs extends MIDlet { private Display display; // The display private ArcsCanvas canvas; // Canvas public Arcs() { display = Display.getDisplay(this); canvas = new ArcsCanvas(this); } protected void startApp() { display.setCurrent( canvas ); } protected void pauseApp() { } protected void destroyApp( boolean unconditional ) { } public void exitMIDlet() { destroyApp(true); notifyDestroyed(); } } /*-------------------------------------------------- * Class ArcsCanvas * * Draw arcs *-------------------------------------------------*/ class ArcsCanvas extends Canvas implements CommandListener { private Command cmExit; // Exit midlet private Arcs midlet; public ArcsCanvas(Arcs midlet) { this.midlet = midlet; // Create exit command & listen for events cmExit = new Command("Exit", Command.EXIT, 1); addCommand(cmExit); setCommandListener(this); } /*-------------------------------------------------- * Draw an arc *-------------------------------------------------*/ protected void paint(Graphics g) { // Start at 3 o'clock and rotate 225 degrees g.drawArc(5, 5, 75, 75, 0, 225); // g.fillArc(5, 5, 75, 75, 0, 225); // Start at 12 o'clock and rotate 225 degrees // g.drawArc(5, 5, 75, 75, 90, 225); // Change the size of the bounding box // Start at 12 o'clock and rotate 225 degrees // g.drawArc(25, 35, 30, 50, 90, 225); } public void commandAction(Command c, Displayable d) { if (c == cmExit) midlet.exitMIDlet(); } }
1. | Rectangle Example | ||
2. | Rectangles | ||
3. | Filled Rectangle Example | ||
4. | Arc | ||
5. | Arc Filled Example |