Blackberry create a Custom Button Field -1

import net.rim.device.api.system.Bitmap;
import net.rim.device.api.ui.*;

public class CustomButtonField extends Field
{
    Bitmap Unfocus_img, Focus_img, current_pic;
    int width;
    String text;
    Font font;  
    CustomButtonField(int width, String text, Bitmap onFocus, Bitmap onUnfocus, long style)
    {
        super(style);
        Unfocus_img = onUnfocus;
        Focus_img = onFocus;
        current_pic = onFocus;
        this.text = text;
        this.width = width;
    }
    protected void layout(int width, int height)
    {
        setExtent(current_pic.getWidth(), current_pic.getHeight());      
    }
    protected void paint(Graphics graphics)
    {
        try
        {
                FontFamily fntFamily = FontFamily.forName("BBAlpha Sans");
                font = fntFamily.getFont(Font.BOLD,14);            
        }
        catch(Exception e)
        {
            font = Font.getDefault();
       
        }
        graphics.setFont(font);
        graphics.setColor(Color.WHITE);
        graphics.drawBitmap(0, 0, current_pic.getWidth(), current_pic.getHeight(), current_pic, 0, 0);
        graphics.drawText(text, width, 7);
    }
    protected void onFocus(int direction)
    {
        super.onFocus(direction);
        current_pic = Unfocus_img;
        this.invalidate();
    }
  protected void drawFocus(Graphics graphics, boolean on)
  {
     
    }
    protected void onUnfocus()
    {
        super.onUnfocus();
        current_pic = Focus_img;
        invalidate();
    }
    public boolean isFocusable() {
        return true;
    }
    protected boolean navigationClick(int status, int time) {
        fieldChangeNotify(0);
        return true;
    }
}


And the  use of the given above code is as follows:


Bitmap focus = Bitmap.getBitmapResource("printButton_focus.png");
Bitmap unfocus = Bitmap.getBitmapResource("printButton_unfocus.png");
         
Bitmap focus1 = Bitmap.getBitmapResource("button-highlight.png");Bitmap unfocus1 = Bitmap.getBitmapResource("button.png");
         
 ButtonField obj = new ButtonField("Button");
 CustomButtonField button1 = new CustomButtonField(0,"",unfocus,focus,Field.FOCUSABLE);
 CustomButtonField button2 = new CustomButtonField(25,"Next",unfocus1,focus1,Field.FOCUSABLE);
         
 add(obj);
 add(new RichTextField(Field.NON_FOCUSABLE));
 add(button1);
 add(new RichTextField(Field.NON_FOCUSABLE));
 add(button2);