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/**
 *
 * @author STUDENT
 */
// Fig. 13.26: GridLayoutDemo.java
// Demonstrating GridLayout.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;



public class GridLayoutDemo extends JFrame implements ActionListener {
    private JButton buttons[];
    private final String names[]= {"ones","two","three","four","five","six"};
    private boolean toggle=true;
    private Container container;
    private GridLayout grid1, grid2;
    
    //set up GUI
    
    public GridLayoutDemo()
    {
        super("GridLayout Demo");
        
    //set up layout
        grid1=new GridLayout(2,3,5,5);
        grid2=new GridLayout(3,2);
        
    //get content pane and set its layout
        container=getContentPane();
        container.setLayout(grid1);
        
    //create and add buttons
        buttons=new JButton[names.length];
        
        for (int count=0;count<names.length; count++){
            buttons[count]=new JButton(names[count]);
            buttons[count].addActionListener(this);
            container.add(buttons[count]);
            
        }
        setSize(300,150);
        setVisible(true);
        
    }//end constructor GridLayoutDemo
    
    //handle button events by toggling between layouts
    public void actionPerformed(ActionEvent event)
    {
        if (toggle)
            container.setLayout(grid2);
        else
            container.setLayout(grid1);
        
        toggle=!toggle; //set toggle to opposite value
        container.validate();
    }


    /**
     * @param args the command line arguments
     */
    
    
    public static void main(String[] args) {
        GridLayoutDemo application= new GridLayoutDemo();
        application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

}// end class GridLayoutDemo