Re: Labeled button row using BorderLayout

From:

Knute Johnson <nospam@rabbitbrush.frazmtn.com>

Newsgroups:

comp.lang.java.gui

Date:

Thu, 30 Sep 2010 13:34:15 -0700

Message-ID:

<gv6po.23041$qU5.19011@newsfe20.iad>

On 9/30/2010 12:41 PM, Fred wrote:

I have a JPanel with BorderLayout.
I want to have a label (icon) in the west area, and a row of buttons
in the center.
When the user stretches the component vertically, the icon remains
centered vertically, but the button row stays pegged to the top of the
center area. How can I get the buttons to remain centered vertically?

I am placing a JPanel in the center, with flow layout. Then I add the
buttons to that center panel:

          JPanel centerPanel = new JPanel();
          centerPanel.setAlignmentY( Component.CENTER_ALIGNMENT );
          centerPanel.setAlignmentX( Component.CENTER_ALIGNMENT );
          // ... add buttons to centerPanel

          JLabel Label= new JlLabel();
          Label.setIcon(myIcon);

          JPanel p = new JPanel( new BorderLayout() );
          p.setAlignmentX( Component.CENTER_ALIGNMENT );
          p.setAlignmentY( Component.CENTER_ALIGNMENT );
          p.add( centerPanel, BorderLayout.CENTER );
          p.add( Label, BorderLayout.WEST );

--
Fred K

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class test extends JPanel {
     public test() {
         super(new GridBagLayout());

         GridBagConstraints c = new GridBagConstraints();
         c.gridx = c.gridy = 0;

         JButton b1 = new JButton("One");
         JButton b2 = new JButton("Two");
         JButton b3 = new JButton("Three");
         JButton b4 = new JButton("Four");

         add(b1,c);
         ++c.gridy;
         add(b2,c);
         ++c.gridy;
         add(b3,c);
         ++c.gridy;
         add(b4,c);

     }

     public static void main(String[] args) {
         EventQueue.invokeLater(new Runnable() {
             public void run() {
                 JFrame f = new JFrame();
                 f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                 test t = new test();
                 f.add(t,BorderLayout.CENTER);
                 JLabel l = new JLabel("Label");
                 f.add(l,BorderLayout.WEST);
                 f.pack();
                 f.setVisible(true);
             }
         });
     }
}

--

Knute Johnson
email s/nospam/knute2010/