mainmenu.java

this small program about implement barcodes in mobile phone

package barcodereader;

import java.io.IOException;
import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.Sprite;

public class MainMenu extends Canvas{
    public PictureView pictureview;
    public PictureProcess pictureprocess;
    public Result result;
    private BarcodeReader barcodereader;
    private TakePicture takepicture;
    private About about;
    private Image mainmenu, menuicon;
    private Thread takepicturet;
    private int menuindex;
    
    public MainMenu(BarcodeReader br) {
        barcodereader = br;
        
        takepicture = new TakePicture(barcodereader);
        pictureview = new PictureView(barcodereader);
        pictureprocess = new PictureProcess(barcodereader);
        result = new Result(barcodereader);
        about = new About(barcodereader);
        
        try{
            mainmenu = Image.createImage(getClass().getResourceAsStream(
                "/image/mainmenu.PNG"));
            menuicon = Image.createImage(getClass().getResourceAsStream(
                "/image/menuicon.PNG"));
        }
        catch(IOException ioe) {
            ioe.printStackTrace();
        }
        
        menuindex = 1;
    }
    
    public void paint(Graphics g) {
        barcodereader.graphics.setColor(0, 0, 0);
        barcodereader.graphics.fillRect(0, 0, barcodereader.bufferheight, 
            barcodereader.bufferwidth);
        barcodereader.graphics.drawImage(mainmenu, 0, 0, 
            Graphics.LEFT | Graphics.TOP);
        
        if(menuindex==1) {
            barcodereader.graphics.drawRegion(menuicon, 0, 0, 150, 50, 
                Sprite.TRANS_NONE, 13, 25, Graphics.LEFT | Graphics.TOP);
        }
        else if(menuindex==2) {
            barcodereader.graphics.drawRegion(menuicon, 0, 50, 150, 50, 
                Sprite.TRANS_NONE, 13, 85, Graphics.LEFT | Graphics.TOP);
        }
        else{
            barcodereader.graphics.drawRegion(menuicon, 0, 100, 150, 50, 
                Sprite.TRANS_NONE, 13, 145, Graphics.LEFT | Graphics.TOP);
        }
        
        g.setColor(0, 0, 0);
        g.fillRect(0, 0, barcodereader.width, barcodereader.height);
        g.drawImage(barcodereader.background, barcodereader.halfwidth, 
            barcodereader.halfheight, Graphics.HCENTER | Graphics.VCENTER);
        g.drawImage(barcodereader.buffer, barcodereader.halfwidth, 
            barcodereader.halfheight, Graphics.HCENTER | Graphics.VCENTER);
    }
    
    public void keyPressed(int keyCode) {
        if((keyCode==-1)||(keyCode==50)) {
            menuindex--;
            if(menuindex<1) {
                menuindex = 3;
            }
            
            repaint();
        }
        else if((keyCode==-2)||(keyCode==56)) {
            menuindex++;
            if(menuindex>3) {
                menuindex = 1;
            }
            
            repaint();
        }
        else if((keyCode==-5)||(keyCode==53)) {
            if(menuindex==1) {
                takepicturet = new Thread(takepicture);
                takepicturet.start();
            }
            else if(menuindex==2) {
                about.setFullScreenMode(true);
                barcodereader.display.setCurrent(about);
            }
            else{
                barcodereader.destroyApp(false);
                barcodereader.notifyDestroyed();
            }
        }
    }
    
    public void backFromTakePicture() {
        takepicture.quit();
        try{
            takepicturet.join();
        }
        catch(InterruptedException ie) {
            ie.printStackTrace();
        }
        
        barcodereader.mainmenu.setFullScreenMode(true);
        barcodereader.display.setCurrent(barcodereader.mainmenu);
    }
}