public TestSwingExample1() {
super("ActionExample");
setChannel(currentChannel); // enable/disable the Actions as appropriate
channelLabel.setHorizontalAlignment(JLabel.CENTER);
channelLabel.setFont(new Font("Serif", Font.PLAIN, 32));
getContentPane().add(channelLabel, BorderLayout.NORTH);
JPanel buttonPanel = new JPanel(new GridLayout(2, 2, 16, 6));
buttonPanel.setBorder(BorderFactory.createEmptyBorder(6, 16, 16, 16));
getContentPane().add(buttonPanel, BorderLayout.CENTER);
buttonPanel.add(new JButton(upAction));
buttonPanel.add(new JButton(gotoFavoriteAction));
buttonPanel.add(new JButton(downAction));
buttonPanel.add(new JButton(setFavoriteAction));
JMenuBar mb = new JMenuBar();
JMenu menu = new JMenu("Channel");
menu.add(new JMenuItem(upAction));
menu.add(new JMenuItem(downAction));
menu.addSeparator();
menu.add(new JMenuItem(gotoFavoriteAction));
menu.add(new JMenuItem(setFavoriteAction));
mb.add(menu);
setJMenuBar(mb);
}
public void setChannel(int chan) {
currentChannel = chan;
channelLabel.setText("Now tuned to channel: " + currentChannel);
// enable/disable the Actions as appropriate
downAction.setEnabled(currentChannel > MIN_CHANNEL);
upAction.setEnabled(currentChannel < MAX_CHANNEL);
gotoFavoriteAction.setEnabled(currentChannel != favoriteChannel);
setFavoriteAction.setEnabled(currentChannel != favoriteChannel);
}