import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.Random;
import javax.swing.JOptionPane;
import javax.swing.ProgressMonitor;
import javax.swing.SwingWorker;

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/*
 * JProgressMonitor.java
 *
 * Created on Jul 28, 2010, 12:37:13 AM
 */

/**
 *
 * @author Wilson Leong
 */
public class JProgressMonitor extends javax.swing.JFrame {

    /** Creates new form JProgressMonitor */
    public JProgressMonitor() {
        initComponents();
    }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        jLabel1 = new javax.swing.JLabel();
        jbtStart = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("Progress Monitor");

        jLabel1.setText("Please click me");

        jbtStart.setText("Start");
        jbtStart.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jbtStartActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(47, 47, 47)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                    .addComponent(jbtStart, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jLabel1, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addContainerGap(61, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jLabel1)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jbtStart)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>//GEN-END:initComponents

    private void jbtStartActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jbtStartActionPerformed
        /*display the progress monitor*/
        progressMonitor = new ProgressMonitor(JProgressMonitor.this, "Content loading...","", 0, 100);

        task = new Task(); // invoke the task method

        /*perform the progress monitor loading*/
        task.addPropertyChangeListener(new PropertyChangeListener(){
            public void propertyChange(PropertyChangeEvent e){
                if("progress".equals(e.getPropertyName())){
                    int progress = (Integer)e.getNewValue();
                    progressMonitor.setProgress(progress);
                }
            }
        });
        task.execute(); // execute swingworker
    }//GEN-LAST:event_jbtStartActionPerformed
    
    /*Task Class for SwingWorker*/
    public class Task extends SwingWorker<Void,Void>{
        public Void doInBackground(){   // Code run on background thread
            Random random = new Random(); // invoke the random method
            int progress = 0; // initialize the progress to 0
            setProgress(0);
            while(progress < 100){
                try{
                    Thread.sleep(random.nextInt(1000));
                }
                catch(InterruptedException ex){
                }
                progress += (Integer)random.nextInt(10);
                setProgress(Math.min(progress,100));
            }
            JOptionPane.showMessageDialog(null, "The load content is complete", "Complete", JOptionPane.PLAIN_MESSAGE);
            return null; // doInBackground must return null
        }
    }
    /**
    * @param args the command line arguments
    */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new JProgressMonitor().setVisible(true);
            }
        });
    }
    private Task task;
    private ProgressMonitor progressMonitor;

    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JLabel jLabel1;
    private javax.swing.JButton jbtStart;
    // End of variables declaration//GEN-END:variables

}