/*
Example of handling component change events to control the minimum and 
maximum size of a contentPane (JFrame).

Also shows the use of MatteBorder.  Borders replace insets as the way to
have spacing inside containers.

Mike Barnes
9/20/04
*/


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


public class ComponentResize extends JFrame  {
    
       
  public ComponentResize(String title){
    super(title);
        
    // add ComponentListener to deal with window resize events
    addComponentListener(new ControlWindowSize());

    // Borders replace insets in containers.
    // For the JFrame the borders are set via the JRootPane....
    Insets insets = new Insets(5, 5, 5, 5);
    JRootPane rp = getRootPane();
    rp.setBorder(new MatteBorder(insets, Color.lightGray));

    Container contentPane = getContentPane();
    contentPane.setLayout(new BorderLayout(5, 5));
    
    JButton b = new JButton("north");
    b.setBackground(Color.pink);
    contentPane.add(b, BorderLayout.NORTH);

    b = new JButton("south");
    b.setBackground(Color.red);
    contentPane.add(b, BorderLayout.SOUTH);

    b = new JButton("center");
    b.setToolTipText("try resizing the frame small and very large");
    b.setBackground(Color.cyan);
    contentPane.add(b, BorderLayout.CENTER);

    b = new JButton("east");
    b.setBackground(Color.yellow);
    contentPane.add(b, BorderLayout.EAST);

    b = new JButton("west");
    b.setBackground(Color.orange);
    contentPane.add(b, BorderLayout.WEST);
    System.out.println(contentPane.getInsets());
    }
    
  class ControlWindowSize extends ComponentAdapter {
      public void componentResized(ComponentEvent e) {
          int width, height;
          JFrame source = (JFrame) e.getSource();
          Dimension d = new Dimension(source.getSize());
          width = (int) d.getWidth();
          height = (int) d.getHeight();
          if (width < 300) width = 300;
            else if (width > 500) width = 500;
            else if (height < 200) height = 200;
            else if (height > 500) height = 500;
            else return;
          source.setSize(new Dimension(width, height));
          }    
      }

  public static void main(String [] args){
    ComponentResize app = new ComponentResize("JFrame size control");
    app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    app.pack();
    app.setVisible(true); 
    }
    
  }