import javax.swing.*; import java.awt.event.*; import java.awt.*; public class DesktopTest extends JFrame { public DesktopTest() { super( "Using a JDesktopPane" ); JMenuBar bar = new JMenuBar(); JMenu addMenu = new JMenu( "Add" ); JMenuItem newFrame = new JMenuItem( "Internal Frame" ); addMenu.add( newFrame ); bar.add( addMenu ); setJMenuBar( bar ); final JDesktopPane theDesktop = new JDesktopPane(); getContentPane().add( theDesktop ); newFrame.addActionListener( new ActionListener() { public void actionPerformed( ActionEvent e ) { JInternalFrame frame = new JInternalFrame( "Internal Frame", true, true, true, true ); Container c = frame.getContentPane(); MyJPanel panel = new MyJPanel(); c.add( panel, BorderLayout.CENTER ); Dimension size = panel.getImageWidthHeight(); frame.setSize( size.width, size.height ); //frame.setOpaque( true ); frame.show(); theDesktop.add( frame ); } } ); setSize( 500, 400 ); show(); } public static void main( String args[] ) { DesktopTest app = new DesktopTest(); app.addWindowListener( new WindowAdapter() { public void windowClosing( WindowEvent e ) { System.exit( 0 ); } } ); } } class MyJPanel extends JPanel { private ImageIcon imgIcon; public MyJPanel() { imgIcon = new ImageIcon( "jhtp3.gif" ); } public void paintComponent( Graphics g ) { super.paintComponent(g); imgIcon.paintIcon( this, g, 0, 0 ); } public Dimension getImageWidthHeight() { return new Dimension( imgIcon.getIconWidth(), imgIcon.getIconHeight() ); } }
Maintained by John Loomis, last updated 5 July 2000