/*
    NestedJPanels.java
    CIS 160
    David Klick
    2011-09-24

    Demonstration of nested JPanels
*/

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

public class NestedJPanels extends JFrame {
    public static void main(String[] args) {
        new NestedJPanels();
    }

    public NestedJPanels() {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }
    
    private void createAndShowGUI() {
        // create all the containers we will need
        JPanel top = new JPanel();
        JPanel topWest = new JPanel();
        JPanel topCenter = new JPanel();
        JPanel topEast = new JPanel();
        JPanel bottom = new JPanel();
        Container c = getContentPane();

        // set the layout managers on the containers
        c.setLayout(new BorderLayout());
        top.setLayout(new BorderLayout());
        topWest.setLayout(new GridLayout(3,1));
        topCenter.setLayout(new FlowLayout());
        topEast.setLayout(new GridLayout(3,1));
        bottom.setLayout(new FlowLayout());

        // create and add widgets to the containers
        topWest.add(new JButton("topWest 1"));
        topWest.add(new JButton("topWest 2"));
        topWest.add(new JButton("topWest 3"));
        topEast.add(new JButton("topEast 1"));
        topEast.add(new JButton("topEast 2"));
        topEast.add(new JButton("topEast 3"));
        topCenter.add(new JLabel("topCenter"));
        bottom.add(new JLabel("South on c"));

        // nest 3 panels inside top panel
        top.add(topWest, BorderLayout.WEST);
        top.add(topCenter, BorderLayout.CENTER);
        top.add(topEast, BorderLayout.EAST);

        // add two main containers to content pane
        c.add(top, BorderLayout.CENTER);
        c.add(bottom, BorderLayout.SOUTH);

        // set up window properties and make it appear
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setSize(400, 300);
        setVisible(true);
    }
}