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LayeredPaneDemo2.javaAPI DocExample4795Tue Dec 12 18:59:26 GMT 2000None

LayeredPaneDemo2

public class LayeredPaneDemo2 extends JFrame

Fields Summary
private String[]
layerStrings
private Color[]
layerColors
private JLayeredPane
layeredPane
private JLabel
dukeLabel
Constructors Summary
public LayeredPaneDemo2()


         
        super("LayeredPaneDemo2");

        //Create and load the duke icon
        final ImageIcon icon = new ImageIcon("images/dukeWaveRed.gif");

        //Create and set up the layered pane
        layeredPane = new JLayeredPane();
        layeredPane.setPreferredSize(new Dimension(300, 310));
        layeredPane.setBorder(BorderFactory.createTitledBorder(
                                    "Move the Mouse to Move Duke"));
        layeredPane.addMouseMotionListener(new MouseMotionAdapter() {
            final int XFUDGE = 40;
            final int YFUDGE = 57;
            public void mouseEntered(MouseEvent e) {
                dukeLabel.setLocation(e.getX()-XFUDGE, e.getY()-YFUDGE);
            }
            public void mouseMoved(MouseEvent e) {
                dukeLabel.setLocation(e.getX()-XFUDGE, e.getY()-YFUDGE);
            }
        });

        layeredPane.setLayout(new GridLayout(2,3));

        //Add several overlapping, colored labels to the layered pane
        //using absolute positioning/sizing.
        for (int i = 0; i < layerStrings.length; i++) {
            JLabel label = createColoredLabel(layerStrings[i],
                                              layerColors[i]);
            layeredPane.add(label, new Integer(i));  
        }

        //Create and add the Duke label to the layered pane
        dukeLabel = new JLabel(icon);
        dukeLabel.setBounds(15, 225, 
                            icon.getIconWidth(),
                            icon.getIconHeight());
        layeredPane.add(dukeLabel, new Integer(2), 0);

        //Add control pane and layered pane to frame
        Container contentPane = getContentPane();
        contentPane.setLayout(new BoxLayout(contentPane,
                                            BoxLayout.Y_AXIS));
        contentPane.add(Box.createRigidArea(new Dimension(0, 10)));
        contentPane.add(createControlPanel());
        contentPane.add(Box.createRigidArea(new Dimension(0, 10)));
        contentPane.add(layeredPane);
Methods Summary
private javax.swing.JLabelcreateColoredLabel(java.lang.String text, java.awt.Color color)

        JLabel label = new JLabel(text);
        label.setVerticalAlignment(JLabel.TOP);
        label.setHorizontalAlignment(JLabel.CENTER);
        label.setOpaque(true);
        label.setBackground(color);
        label.setForeground(Color.black);
        label.setBorder(BorderFactory.createLineBorder(Color.black));
        label.setPreferredSize(new Dimension(140, 140));
        return label;
private javax.swing.JPanelcreateControlPanel()


        final JCheckBox onTop = new JCheckBox("Top Position in Layer");
        onTop.setSelected(true);
        onTop.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                if (onTop.isSelected())
                    layeredPane.moveToFront(dukeLabel);
                else
                    layeredPane.moveToBack(dukeLabel);
            }
        });

        final JComboBox layerList = new JComboBox(layerStrings);
        layerList.setSelectedIndex(2);    //cyan layer
        layerList.addActionListener(new ActionListener () {
            public void actionPerformed(ActionEvent e) {
                int position = onTop.isSelected() ? 0 : 1;
                layeredPane.setLayer(dukeLabel,
                                     layerList.getSelectedIndex(),
                                     position);
            }
        });
        
        JPanel controls = new JPanel();
        controls.add(layerList);
        controls.add(onTop);
        controls.setBorder(BorderFactory.createTitledBorder(
                                 "Choose Duke's Layer and Position"));
        return controls;
public static voidmain(java.lang.String[] args)

        JFrame frame = new LayeredPaneDemo2();

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

        frame.pack();
        frame.setVisible(true);