/**
* And now for a little assembly. Put together the buttons, progress bar and status text field.
*/
Example1(String name) {
setBorder(BorderFactory.createTitledBorder(BorderFactory.createLineBorder(Color.black), name));
progressBar.setMaximum(NUMLOOPS);
startButton = new JButton("Start");
startButton.addActionListener(startListener);
startButton.setEnabled(true);
interruptButton = new JButton("Cancel");
interruptButton.addActionListener(interruptListener);
interruptButton.setEnabled(false);
JComponent buttonBox = new JPanel();
buttonBox.add(startButton);
buttonBox.add(interruptButton);
setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
add(buttonBox);
add(progressBar);
add(statusField);
statusField.setAlignmentX(CENTER_ALIGNMENT);
buttonBox.setBorder(spaceBelow);
Border pbBorder = progressBar.getBorder();
progressBar.setBorder(BorderFactory.createCompoundBorder(spaceBelow, pbBorder));
}
public void actionPerformed(ActionEvent event) {
startButton.setEnabled(false);
interruptButton.setEnabled(true);
statusField.setText("Working...");
/* Constructing the SwingWorker() causes a new Thread
* to be created that will call construct(), and then
* finished(). Note that finished() is called even if
* the worker is interrupted because we catch the
* InterruptedException in doWork().
*/
worker =
new SwingWorker() {
public Object construct() {
return doWork();
}
public void finished() {
startButton.setEnabled(true);
interruptButton.setEnabled(false);
statusField.setText(get().toString());
}
};
}
public void actionPerformed(ActionEvent event) {
interruptButton.setEnabled(false);
worker.interrupt();
startButton.setEnabled(true);
}