/**
 * LayoutDemoApplet.java
 * Launches various Frames illustrating various effects
 * of layout managers.
 */

 import java.applet.Applet;
 import java.awt.*;
 import java.awt.event.*;

 public class LayoutDemoApplet extends Applet implements ActionListener
 {
 	private Button closeFrame,
 						badLayout,
 						flowWithPack,
 						flowWithoutPack,
 						gridWithPack,
 						gridWithoutPack,
 						borderWithoutPack,
 						borderWithPack;

 	private Frame display = null;

 	private Panel top, bottom;

 	public void init(){

		top = new Panel();
		bottom = new Panel();

 		closeFrame = new Button("Close frame");

 		badLayout = new Button("Oops!");

 		flowWithPack = new Button("Flow + pack");
 		flowWithoutPack = new Button("Flow + no pack");

 		gridWithPack = new Button("Grid + pack");
 		gridWithoutPack = new Button("Grid + no pack");

 		borderWithPack = new Button("Border + pack");
 		borderWithoutPack = new Button("Border + no pack");


		bottom.add(closeFrame);

		top.add(badLayout);

		top.add(flowWithPack);
		top.add(flowWithoutPack);

		top.add(gridWithPack);
		top.add(gridWithoutPack);

		top.add(borderWithPack);
		top.add(borderWithoutPack);


		add(top); add(bottom);

 		closeFrame.addActionListener(this);
 		badLayout.addActionListener(this);

 		flowWithPack.addActionListener(this);
		flowWithoutPack.addActionListener(this);

		gridWithPack.addActionListener(this);
		gridWithoutPack.addActionListener(this);

		borderWithPack.addActionListener(this);
		borderWithoutPack.addActionListener(this);


	}

	public void actionPerformed(ActionEvent ae) {
		String cmd = ae.getActionCommand();
		if(cmd.equals("Oops!")) {
			if(display == null) { // one Frame at a time!
				display = new ConverterDemo0 ();
			}
		}
		if(cmd.equals("Flow + pack")) {
			if(display == null) {
				display = new ConverterDemo1();
			}
		}
		if(cmd.equals("Grid + pack")) {
			if(display == null) {
				display = new ConverterDemo1grid();
			}
		}
		if(cmd.equals("Flow + no pack")) {
			if(display == null) {
				display = new ConverterDemo1nopack();
			}
		}
		if(cmd.equals("Grid + no pack")) {
			if(display == null) {
				display = new ConverterDemo1gridnp();
			}
		}
		if(cmd.equals("Border + pack")) {
			if(display == null) {
				display = new ConverterDemo1a();
			}
		}
		if(cmd.equals("Border + no pack")) {
			if(display == null) {
				display = new ConverterDemo1abordernp();
			}
		}
		if(cmd.equals("Close frame")) {
			if(display != null) {
				display.dispose();
				display = null;	// restart
			}
		}
	}
}