FieldChangeListener for the custom field does not...

Hi all

I searched for him and almost all positions tried but failed to get the solution of it. Here is my code. My problem is when I click on the individual images the fieldchangelistener must be called and the message.

package com.samples;

import net.rim.device.api.ui.Field;
import net.rim.device.api.ui.FieldChangeListener;
import net.rim.device.api.ui.Manager;
import net.rim.device.api.ui.component.Dialog;
import net.rim.device.api.ui.container.MainScreen;
import net.rim.device.api.ui.container.VerticalFieldManager;

public class CustomPaintingScreen extends MainScreen implements FieldChangeListener
{
    CustomClass[] custom;

    FieldChangeListener itemlistener = new FieldChangeListener() {

        public void fieldChanged(Field field, int context)
        {
            Dialog.alert("clicked");
        }
    };

    public CustomPaintingScreen()
    {
        setTitle("Custom Painting ");
        custom = new CustomClass[10];
        VerticalFieldManager vfm = new VerticalFieldManager(Manager.VERTICAL_SCROLLBAR|Manager.LEAVE_BLANK_SPACE);  

        for (int i = 0; i < custom.length; i++)
        {
            custom[i] = new CustomClass();
            custom[i].setChangeListener(itemlistener);
            vfm.add(custom[i]);
        }
        this.add(vfm);
    }

    public void fieldChanged(Field field, int context)
    {
        if(field instanceof CustomClass)
        {
            Dialog.alert("clicked");
        }
    }
}

and here's my customclass

package com.samples;

import java.util.Vector;
import net.rim.device.api.system.Bitmap;
import net.rim.device.api.system.Display;
import net.rim.device.api.ui.Color;
import net.rim.device.api.ui.Field;
import net.rim.device.api.ui.Font;
import net.rim.device.api.ui.Graphics;
import net.rim.device.api.ui.XYRect;

public class CustomClass extends Field //implements FieldChangeListener
{
    private XYRect dest;
    private Bitmap bitmap;
    private Vector vtr;
    private Bitmap next;

    public CustomClass()
    {
        bitmap = Bitmap.getBitmapResource("laptop.png");
        next = Bitmap.getBitmapResource("next.png");
        dest = new XYRect(20,15,bitmap.getWidth(),bitmap.getHeight());
        //this.setChangeListener(this);     

        vtr = new Vector();
    }

    protected void layout(int width, int height)
    {
        height = getFont().getHeight()* 5;
        setExtent(Display.getWidth(), height);
    }

    protected void paint(Graphics graphics)
    {
        graphics.setColor(0xFF7F24);
        graphics.fillRoundRect(5, 5, (getWidth()-10), (getFont().getHeight()*5), 30, 40);
        graphics.drawBitmap(dest, bitmap, 0, 0);
        graphics.setColor(Color.BLACK);
        int x = bitmap.getWidth()+25;
        int y = 15;
        graphics.setFont(getFont().derive(Font.BOLD));
        graphics.drawText("Dell Laptop", x, y, 0, getWidth());
        graphics.setFont(getFont().derive(Font.PLAIN,15));

        String str= "Discover Dell Inspiron and XPS Laptops with advanced technology.this is dell laptop";
        vtr = wrap(str, 300,graphics);
        System.out.println(" "+vtr.toString());

        graphics.drawBitmap(335, 15, next.getWidth(), next.getHeight(), next, 0, 0);

//      graphics.drawText(vtr.toString(), x, (y+20), 0,300 );
    }

    private Vector wrap (String text, int width,Graphics graphics)
    {
        int x = bitmap.getWidth()+25;
        int y = 35;

        Vector result = new Vector ();
        if (text == null)
           return result;

        boolean hasMore = true;

        // The current index of the cursor
        int current = 0;

        // The next line break index
        int lineBreak = -1;

        // The space after line break
        int nextSpace = -1;

        while (hasMore)
        {
           //Find the line break
           while (true)
           {
               lineBreak = nextSpace;
               if (lineBreak == text.length() - 1)
               {
                   // We have reached the last line
                   hasMore = false;
                   break;
               }
               else
               {
                   nextSpace = text.indexOf(' ', lineBreak+1);
                   if (nextSpace == -1)
                      nextSpace = text.length() -1;
                   int linewidth = this.getFont().getAdvance(text,current, nextSpace-current);
                   // If too long, break out of the find loop
                   if (linewidth > width)
                      break;
               }
          }
          String line = text.substring(current, lineBreak + 1);

          graphics.drawText(line, x, y, 0,350 );
          y=y+15;

          result.addElement(line);
          result.addElement(new String("\n"));
          current = lineBreak + 1;
     }
     return result;
    }

    protected boolean navigationClick(int status, int time)
    {
        fieldChangeNotify(1);
        return super.navigationClick(status, time);
    }

    protected void fieldChangeNotify(int context)
    {
        super.fieldChangeNotify(context);
    }
}

also my images look like this

When I click on the individual images, the dialog box should appear. I tried a lot of things. give me a code. for screen touch for example jde4.7 and jde4.5

Hi peter - what did I want to add the listener on the image above and manipulate. and the picture above, I created using the graphics object. so this is the question that I am able to get the listener?

Tags: BlackBerry Developers

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FieldChangeListener for the custom field does not...

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