import java.awt.*; import java.awt.event.*; import javax.swing.*; /* * CustomIconDemo.java (based on ButtonDemo.java) requires the following files: * ArrowIcon.java * images/middle.gif */ public class CustomIconDemo extends JPanel implements ActionListener { protected JButton b1, b2, b3; public CustomIconDemo() { Icon leftButtonIcon = new ArrowIcon(SwingConstants.RIGHT); Icon middleButtonIcon = createImageIcon("images/middle.gif", "the middle button"); Icon rightButtonIcon = new ArrowIcon(SwingConstants.LEFT); b1 = new JButton("Disable middle button", leftButtonIcon); b1.setVerticalTextPosition(AbstractButton.CENTER); b1.setHorizontalTextPosition(AbstractButton.LEADING); b1.setMnemonic(KeyEvent.VK_D); b1.setActionCommand("disable"); b2 = new JButton("Middle button", middleButtonIcon); b2.setVerticalTextPosition(AbstractButton.BOTTOM); b2.setHorizontalTextPosition(AbstractButton.CENTER); b2.setMnemonic(KeyEvent.VK_M); b3 = new JButton("Enable middle button", rightButtonIcon); //Use the default text position of CENTER, TRAILING (RIGHT). b3.setMnemonic(KeyEvent.VK_E); b3.setActionCommand("enable"); b3.setEnabled(false); //Listen for actions on buttons 1 and 3. b1.addActionListener(this); b3.addActionListener(this); b1.setToolTipText("Click this button to disable the middle button."); b2.setToolTipText("This middle button does nothing when you click it."); b3.setToolTipText("Click this button to enable the middle button."); //Add Components to this container, using the default FlowLayout. add(b1); add(b2); add(b3); } public void actionPerformed(ActionEvent e) { if ("disable".equals(e.getActionCommand())) { b2.setEnabled(false); b1.setEnabled(false); b3.setEnabled(true); } else { b2.setEnabled(true); b1.setEnabled(true); b3.setEnabled(false); } } /** Returns an ImageIcon, or null if the path was invalid. */ protected static ImageIcon createImageIcon(String path, String description) { java.net.URL imgURL = CustomIconDemo.class.getResource(path); if (imgURL != null) { return new ImageIcon(imgURL, description); } else { System.err.println("Couldn't find file: " + path); return null; } } /** * Create the GUI and show it. For thread safety, * this method should be invoked from the * event-dispatching thread. */ private static void createAndShowGUI() { //Make sure we have nice window decorations. JFrame.setDefaultLookAndFeelDecorated(true); //Create and set up the window. JFrame frame = new JFrame("CustomIconDemo"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //Set up the content pane. JComponent newContentPane = new CustomIconDemo(); newContentPane.setOpaque(true); //content panes must be opaque frame.setContentPane(newContentPane); //Display the window. frame.pack(); frame.setVisible(true); } public static void main(String[] args) { //Schedule a job for the event-dispatching thread: //creating and showing this application's GUI. javax.swing.SwingUtilities.invokeLater(new Runnable() { public void run() { createAndShowGUI(); } }); } }