about.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;

public class About extends Canvas{
    private BarcodeReader barcodereader;
    private Image about;
    
    public About(BarcodeReader br) {
        barcodereader = br;
        
        try{
            about = Image.createImage(getClass().getResourceAsStream(
                "/image/about.PNG"));
        }
        catch(IOException ioe) {
            ioe.printStackTrace();
        }
    }
    
    public void paint(Graphics g) {
        barcodereader.graphics.setColor(0, 0, 0);
        barcodereader.graphics.fillRect(0, 0, barcodereader.bufferheight, 
            barcodereader.bufferwidth);
        barcodereader.graphics.drawImage(about, 0, 0, 
            Graphics.LEFT | Graphics.TOP);
        barcodereader.graphics.setColor(255, 200, 0);
        barcodereader.graphics.drawString("Early Build Version", 
            (176-barcodereader.font.stringWidth("Early Build Version"))/2, 
            ((220-barcodereader.fontheight)/2)+20, 
            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) {
        barcodereader.mainmenu.setFullScreenMode(true);
        barcodereader.display.setCurrent(barcodereader.mainmenu);
    }
}