Internet.java

internet.java

import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import java.io.*;
import java.net.*;
import javax.swing.event.*;

public class Internet extends JFrame
{
	final JDesktopPane theDesktop;
	JPanel browse;
	JMenuBar bar;
	JMenu openMenu, travelMenu, helpMenu;
	JMenuItem browserFrame, favouritesFrame, filtersFrame,
				aboutFrame, indexFrame, exitDialog, backItem, forwardItem,
				stopItem, reloadItem;
	JToolBar toolBar;
	JOptionPane exit;
	JButton back;
	private JTextField enter;
	private JEditorPane contents;


	public Internet()
	{
		super( "An Internet Browser" );
		theDesktop = new JDesktopPane();
		getContentPane().add( theDesktop );

		try
		{
			UIManager.setLookAndFeel( "com.sun.java.swing.plaf.windows.WindowsLookAndFeel" );
		}
		catch (Exception e) { }


		bar = new JMenuBar();

		openMenu = new JMenu( "Open" );
		browserFrame = new JMenuItem( "New Web Browser" );
		favouritesFrame = new JMenuItem( "Favourites" );
		filtersFrame = new JMenuItem( "Filters" );
		exitDialog = new JMenuItem( "Exit..." );
		openMenu.add( browserFrame );
		openMenu.add( favouritesFrame );
		openMenu.add( filtersFrame );
		openMenu.addSeparator();
		openMenu.add( exitDialog );
		browserFrame.addActionListener(new ActionListener() {
				public void actionPerformed( ActionEvent e ){
					JInternalFrame frame =
						new JInternalFrame( "Browser", true, true, true, true );

					Container c = frame.getContentPane();
					JPanel b = browser();

					c.add( b );
					frame.setSize( 500, 400 );
					frame.setOpaque( true );
					theDesktop.add( frame );
				}
			}
		);
		//favouritesFrame.addActionListener(this);
		//filtersFrame.addActionListener(this);
		exitDialog.addActionListener( new ActionListener() {
			public void actionPerformed( ActionEvent e )
			{
				exit = new JOptionPane();
				int result = exit.showConfirmDialog( theDesktop, "Exit the Program?",
										"Exit", JOptionPane.YES_NO_OPTION,
										JOptionPane.QUESTION_MESSAGE, null );
				if( result == 0 )
					System.exit( 0 );

			}
		}
		);

		travelMenu = new JMenu( "Go" );
		backItem = new JMenuItem( "Back" );
		forwardItem = new JMenuItem( "Forward" );
		stopItem = new JMenuItem( "Stop" );
		reloadItem = new JMenuItem( "Reload" );
		travelMenu.add( backItem );
		travelMenu.add( forwardItem );
		travelMenu.add( stopItem );
		travelMenu.add( reloadItem );


		helpMenu = new JMenu( "Help" );
		aboutFrame = new JMenuItem( "About..." );
		indexFrame = new JMenuItem( "Index" );
		helpMenu.add( aboutFrame );
		helpMenu.add( indexFrame );
		//aboutFrame.addActionListener(this);
		//indexFrame.addActionListener(this);

		bar.add( openMenu);
		bar.add( travelMenu );
		bar.add( helpMenu);
		setJMenuBar( bar );

		toolBar = new JToolBar();
		back = new JButton( "Back" );
		//toolBar.add( back );
		enter = new JTextField( "Enter file URL here" );
				enter.addActionListener(
					new ActionListener() {
						public void actionPerformed( ActionEvent e )
						{
							getThePage( e.getActionCommand () );
						}
					}
		);
		toolBar.add( enter );
		toolBar.add(Box.createRigidArea(new Dimension(0, 24)));
		toolBar.setFloatable( false );

		getContentPane().add( toolBar, BorderLayout.NORTH );



		setSize(800, 600);
		show();
	}

	public static void main( String args[] )
	{
		Internet app = new Internet();

		app.addWindowListener(
			new WindowAdapter() {
				public void windowClosing( WindowEvent e )
				{
					System.exit( 0 );
				}
			}
		);
	}

	public JPanel browser()
	{
		browse = new JPanel();
		browse.setLayout( new BorderLayout() );

		contents = new JEditorPane();
		contents.setEditable( false );
		contents.addHyperlinkListener(
			new HyperlinkListener() {
				public void hyperlinkUpdate( HyperlinkEvent e )
				{
					if( e.getEventType() == HyperlinkEvent.EventType.ACTIVATED )
						getThePage( e.getURL().toString() );
				}
			}
		);

		browse.add( new JScrollPane( contents ), BorderLayout.CENTER );
		return browse;
	}

	public void getThePage( String location )
	{
		setCursor( Cursor.getPredefinedCursor( Cursor.WAIT_CURSOR) );

		try
		{
			contents.setPage( location );
			enter.setText( location );
		}
		catch ( IOException io )
		{
			JOptionPane.showMessageDialog( this, "Error retrieving specified URL", "Bad URL", JOptionPane.ERROR_MESSAGE );
		}

		setCursor( Cursor.getPredefinedCursor( Cursor.DEFAULT_CURSOR ) );
	}
}