I did a short example for you hope it helps. Basically a JFrame witha button is shown:
when the JButton on the frame is clicked a JDialog will appear with another JButton (Send Email) – this would represent the email dialog:
When the JButton on the emailDialog is pressed it disposes of the emailDialog and creates a new JDialog which will hold the progressbar (or in this case a simple JLabel):
and then it creates and executes the SwingWorker to send the email and dispose() of the JDialog when its done and show a JOptionPane message showing success of the sending:
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
public class Test {
public static void main(String[] args) throws Exception {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new Test().createAndShowUI();
}
});
}
private void createAndShowUI() {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
initComponents(frame);
frame.setPreferredSize(new Dimension(300, 300));//testing purposes
frame.pack();
frame.setVisible(true);
}
private void initComponents(final JFrame frame) {
final JDialog emailDialog = new JDialog(frame);
emailDialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
emailDialog.setLayout(new BorderLayout());
JButton sendMailBtn = new JButton("Send Email");
sendMailBtn.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
//get content needed for email from old dialog
//get rid of old dialog
emailDialog.dispose();
//create new dialog
final JDialog emailProgressDialog = new JDialog(frame);
emailProgressDialog.add(new JLabel("Mail in progress"));
emailProgressDialog.pack();
emailProgressDialog.setVisible(true);
new Worker(emailProgressDialog).execute();
}
});
emailDialog.add(sendMailBtn, BorderLayout.SOUTH);
emailDialog.pack();
JButton openDialog = new JButton("Open emailDialog");
openDialog.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
emailDialog.setVisible(true);
}
});
frame.getContentPane().add(openDialog);
}
}
class Worker extends SwingWorker<String, Object> {
private final JDialog dialog;
Worker(JDialog dialog) {
this.dialog = dialog;
}
@Override
protected String doInBackground() throws Exception {
Thread.sleep(2000);//simulate email sending
return "DONE";
}
@Override
protected void done() {
super.done();
dialog.dispose();
JOptionPane.showMessageDialog(dialog.getOwner(), "Message sent", "Success", JOptionPane.INFORMATION_MESSAGE);
}
}