/*  NestedButtonTest.java
 *
 *  Illustrates the use of background coloring and nested
 *  components.
 *
 *  Derived from Example 6-1 in
 *  "Java Examples in a Nutshell", David Flanagan,
 *  O'Reilly & Associates, 1997
 *
 *  Frame -- panel1 -- button1
 *    |        |
 *    |        |-- panel2 -- button2
 *    |        |
 *    |        |-- panel3 -- button3
 *    |        |
 *    |        |-- panel4 -- button4
 *    |              |
 *    |--  button6   |--  button5
 *
 *  March 29, 1998
 */
 
import java.awt.*;
import java.awt.event.*;
import corejava.*;

public class NestedButtonTest
    extends CloseableFrame
        implements ActionListener
{
    public static void main( String[] args )
    {
        NestedButtonTest f = new NestedButtonTest();
        f.show();
    }

    public NestedButtonTest()
    {
        setLayout( new FlowLayout() );
        this.setBackground( Color.white );
        this.setFont( new Font( "Dialog", Font.BOLD, 24 ) );

            //  Create buttons and register them
        Button redButton     = new Button( "Red"     );
        Button orangeButton  = new Button( "Orange"  );
        Button yellowButton  = new Button( "Yellow"  );
        Button greenButton   = new Button( "Green"   );
        Button blueButton    = new Button( "Blue"    );
        Button magentaButton = new Button( "Magenta" );
        
        Panel p1 = new Panel();
        p1.add( redButton );
        p1.setBackground( Color.red );
        this.add( p1 );
        redButton.addActionListener( this );

        Panel p2 = new Panel();
        p2.add( orangeButton );
        p2.setBackground( Color.orange );
        p1.add( p2 );
        orangeButton.addActionListener( this );

        Panel p3 = new Panel();
        p3.add( yellowButton );
        p3.setBackground( Color.yellow );
        p2.add( p3 );
        yellowButton.addActionListener( this );
        
        Panel p4 = new Panel();
        p4.add( greenButton );
        p4.setBackground( Color.green );
        p1.add( p4 );
        greenButton.addActionListener( this );

        Panel p5 = new Panel();
        p5.add( blueButton );
        p5.setBackground( Color.blue );
        p1.add( p5 );
        blueButton.addActionListener( this );
        
        Panel p6 = new Panel();
        p6.add( magentaButton );
        p6.setBackground( Color.magenta );
        this.add( p6 );
        magentaButton.addActionListener( this );
    }

    public void actionPerformed( ActionEvent e )
    {
        Color c = Color.black;
        
        String arg = e.getActionCommand();
            //  Set color based upon button pressed
        if(      arg.equals("Red"     ) ) c = Color.red;
        else if( arg.equals("Orange"  ) ) c = Color.orange;
        else if( arg.equals("Yellow"  ) ) c = Color.yellow;
        else if( arg.equals("Green"   ) ) c = Color.green;
        else if( arg.equals("Blue"    ) ) c = Color.blue;
        else if( arg.equals("Magenta" ) ) c = Color.magenta;
 
        setBackground( c );
        repaint();
    }
}