/* * Copyright (c) 1995 - 2008 Sun Microsystems, Inc.  All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * *   - Redistributions of source code must retain the above copyright *     notice, this list of conditions and the following disclaimer. * *   - Redistributions in binary form must reproduce the above copyright *     notice, this list of conditions and the following disclaimer in the *     documentation and/or other materials provided with the distribution. * *   - Neither the name of Sun Microsystems nor the names of its *     contributors may be used to endorse or promote products derived *     from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ package components;import java.awt.*;import java.awt.event.*;import javax.swing.*;import java.beans.*;import java.util.Random;public class ProgressMonitorDemo extends JPanel                                 implements ActionListener,                                            PropertyChangeListener {    private ProgressMonitor progressMonitor;    private JButton startButton;    private JTextArea taskOutput;    private Task task;    class Task extends SwingWorker<Void, Void> {        @Override        public Void doInBackground() {            Random random = new Random();            int progress = 0;            setProgress(0);            try {                Thread.sleep(1000);                while (progress < 100 && !isCancelled()) {                    //Sleep for up to one second.                    Thread.sleep(random.nextInt(1000));                    //Make random progress.                    progress += random.nextInt(10);                    setProgress(Math.min(progress, 100));                }            } catch (InterruptedException ignore) {}            return null;        }        @Override        public void done() {            Toolkit.getDefaultToolkit().beep();            startButton.setEnabled(true);            progressMonitor.setProgress(0);        }    }    public ProgressMonitorDemo() {        super(new BorderLayout());        //Create the demo's UI.        startButton = new JButton("Start");        startButton.setActionCommand("start");        startButton.addActionListener(this);        taskOutput = new JTextArea(5, 20);        taskOutput.setMargin(new Insets(5,5,5,5));        taskOutput.setEditable(false);        add(startButton, BorderLayout.PAGE_START);        add(new JScrollPane(taskOutput), BorderLayout.CENTER);        setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));    }    /**     * Invoked when the user presses the start button.     */    public void actionPerformed(ActionEvent evt) {        progressMonitor = new ProgressMonitor(ProgressMonitorDemo.this,                                  "Running a Long Task",                                  "", 0, 100);        progressMonitor.setProgress(0);        task = new Task();        task.addPropertyChangeListener(this);        task.execute();        startButton.setEnabled(false);    }    /**     * Invoked when task's progress property changes.     */    public void propertyChange(PropertyChangeEvent evt) {        if ("progress" == evt.getPropertyName() ) {            int progress = (Integer) evt.getNewValue();            progressMonitor.setProgress(progress);            String message =                String.format("Completed %d%%.\n", progress);            progressMonitor.setNote(message);            taskOutput.append(message);            if (progressMonitor.isCanceled() || task.isDone()) {                Toolkit.getDefaultToolkit().beep();                if (progressMonitor.isCanceled()) {                    task.cancel(true);                    taskOutput.append("Task canceled.\n");                } else {                    taskOutput.append("Task completed.\n");                }                startButton.setEnabled(true);            }        }    }    /**     * Create the GUI and show it.  For thread safety,     * this method should be invoked from the     * event-dispatching thread.     */    private static void createAndShowGUI() {        //Create and set up the window.        JFrame frame = new JFrame("ProgressMonitorDemo");        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        //Create and set up the content pane.        JComponent newContentPane = new ProgressMonitorDemo();        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();            }        });    }}