LayeredPaneDemopublic class LayeredPaneDemo extends JFrame
| Fields Summary |
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| private String[] | layerStrings | | private Color[] | layerColors | | private JLayeredPane | layeredPane | | private JLabel | dukeLabel |
| Constructors Summary |
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public LayeredPaneDemo()
super("LayeredPaneDemo");
//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);
}
});
//This is the origin of the first label added.
Point origin = new Point(10, 20);
//This is the offset for computing the origin for the next label.
int offset = 35;
//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], origin);
layeredPane.add(label, new Integer(i));
origin.x += offset;
origin.y += offset;
}
//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);
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| Methods Summary |
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| private javax.swing.JLabel | createColoredLabel(java.lang.String text, java.awt.Color color, java.awt.Point origin)
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.setBounds(origin.x, origin.y, 140, 140);
return label;
| | private javax.swing.JPanel | createControlPanel()
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 void | main(java.lang.String[] args)
JFrame frame = new LayeredPaneDemo();
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
frame.pack();
frame.setVisible(true);
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