Moving the scrollbar on tab to a specified field

[Deboleena Chakraborty]

Hi,
This is with related to my first mail where i wanted the scrollbar to move on tab and focus on a specified field.
My panel is scrolling horizontally(that i wanted), but what is happening is that everytime the focus is going on the same place i.e. the dimension of the rectangle is same so even if i click on the third field the second field is only visible. Please help me.
Thanks & Regards
Deboleena

[Craig Wood]

The Dimension of each field may be the same but the Rectangle of each is unique

    Rectangle r = fields[1].getBounds();
    Dimension d = fields[1].getSize();
    //    System.out.println:
    r = java.awt.Rectangle[x=288,y=51,width=180,height=20]
    d = java.awt.Dimension[width=180,height=20]

so the scrollpane must scroll to the rectangle given to scrollRectToVisible.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
 
public class ScrollingTest
{
    public static void main(String[] args)
    {
        final JLabel[] labels = new JLabel[5];
        final JTextField[] fields = new JTextField[5];
        final JPanel panel = new JPanel(new GridBagLayout());
        FocusListener l = new FocusAdapter()
        {
            JLabel label;
 
            public void focusGained(FocusEvent e)
            {
                JTextField tf = (JTextField)e.getSource();
                for(int i = 0; i < fields.length; i++)
                    if(tf == fields[i])
                        label = labels[i];
                Rectangle r = tf.getBounds();
                r.add(label.getBounds());
                panel.scrollRectToVisible(r);
            }
        };
        GridBagConstraints gbc = new GridBagConstraints();
        gbc.weightx = 1.0;
        for(int i = 0; i < fields.length; i++)
        {
            labels[i] = new JLabel("label " + (i + 1));
            fields[i]= new JTextField(16);
            addComponents(labels[i], fields[i], panel, gbc);
            fields[i].addFocusListener(l);
        }
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(new JScrollPane(panel));
        f.setSize(400,175);
        f.setLocation(200,200);
        f.setVisible(true);
    }
 
    private static void addComponents(JLabel label, JTextField tf, JPanel p,
                                      GridBagConstraints gbc)
    {
        gbc.insets = new Insets(5,10,5,1);
        gbc.anchor = gbc.EAST;
        p.add(label, gbc);
        gbc.insets = new Insets(5,1,5,10);
        gbc.anchor = gbc.WEST;
        p.add(tf, gbc);
    }
}