Re: Multiple Lines with a FlowLayout within a SOUTH region in a BorderLayout

From:

"John B. Matthews" <nospam@nospam.invalid>

Newsgroups:

comp.lang.java.gui

Date:

Tue, 15 Jun 2010 11:37:16 -0400

Message-ID:

<nospam-5CD628.11371615062010@news.aioe.org>

In article <4c17748c$0$4019$5402220f@news.sunrise.ch>,
phi <myjunkee@web.de> wrote:

My Problem is, that I want to have a my Buttons in the SOUTH in a
BorderLayout. There, the buttons are aligned in a FlowLayout. When
the user changes the size of the Window, the buttons are repainted.
If there is not enough space, the Buttons disapear, instead of what I
want to have: The SOUTH region enlarges and two rows of buttons
appear.

Any Idea how to perform the above task?

Here's one approach using BoxLayout instead of BorderLayout. You may
want to look into using filler instead of glue:

<http://java.sun.com/docs/books/tutorial/uiswing/layout/box.html>

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

public class MultiLineSouth implements Runnable {

    public static void main(String[] args) {
        EventQueue.invokeLater(new MultiLineSouth());
    }

    @Override
    public void run() {
        JFrame jf = new JFrame("Multiple Lines in the South");
        jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        jf.add(makeMainPanel());
        jf.pack();
        jf.setVisible(true);
    }

    JPanel makeMainPanel() {
        final JPanel panel = new JPanel();
        panel.setLayout(new BoxLayout(panel, BoxLayout.PAGE_AXIS));
        panel.add(new JLabel("top"));
        panel.add(Box.createVerticalGlue());
        panel.add(new JLabel("center"));
        panel.add(Box.createVerticalGlue());
        panel.add(makeSouthPanel());
        return panel;
    }

    JPanel makeSouthPanel() {
        JPanel panel = new JPanel(); // Default FlowLayout
        panel.add(new JButton("Hello"));
        panel.add(new JButton("World"));
        panel.add(new JButton("OK"));
        panel.add(new JButton("Cancel"));
        return panel;
    }
}

--
John B. Matthews
trashgod at gmail dot com
<http://sites.google.com/site/drjohnbmatthews>