Read the following article regarding usage of threads
in swing app.
http://java.sun.com/docs/books/tutorial/uiswing/misc/threads.html
cheers..
Samir
--- cerqueira <[EMAIL PROTECTED]> wrote:
>
> Hi,
>
> I would appreciate if someone could help me with the
> following doubt:
>
> Scenario:
> -------------
> I made a form using java swing, which has some
> buttons.
> To all the buttons I added an ActionListener - which
> will implement the
> actionPerformed() function.
>
> Problem:
> ------------
> Some of the actions performed when the user presses
> one button take some
> minutes (not too much), however I thought of
> showing JOptionPane.showMessageDialog() presenting
> the message "Processing
> task" while the user waits for the results...
>
> Tried solution:
> -------------------
> I made a class which estends Thread:
>
> public class OperationProgressThread extends Thread
> {
>
> private static JOptionPane jOptionPane;
>
> public OperationProgressThread ()
> {
> jOptionPane = new JOptionPane();
> }
>
> public void run()
> {
> jOptionPane.showMessageDialog( null, "Please
> wait...", "",
> JOptionPane.INFORMATION_MESSAGE);
> }
> }
>
> Then in the class where I defined the form, i create
> a new instance of
> OperationProgressThread and invoke the start() and
> stop()
> methods in the beginning and at the end
> (respectively) of the action to
> perform when the button is pressed:
>
> OperationProgressThread thread = new
> OperationProgressThread();
>
> doImport.setPreferredSize(new
> java.awt.Dimension(80, 27));
> doImport.setText("Import");
> doImport.addActionListener(new
> java.awt.event.ActionListener() {
> public void
> actionPerformed(java.awt.event.ActionEvent evt) {
> doImportActionPerformed(evt);
> }
> }
> );
>
> /**
> * The doImportActionPerformed method in this
> class
> * is called when the user presses the "Import"
> button.
> */
> private void
> doImportActionPerformed(java.awt.event.ActionEvent
> evt)
> {
> thread start();
> boolean bRetVal = false;
> try
> {
> bRetVal = dbIntUser.cmdImportClick(
> sSelectedInterface );
> System.out.println( "cmdImportClick
> returned " + bRetVal );
> }
> catch ( ComJniException cje ) {
> jOptionPane1.showMessageDialog( null,
> cje.getMessage(), "Exception",
> JOptionPane.ERROR_MESSAGE); }
> catch ( Exception e ) {
> jOptionPane1.showMessageDialog( null,
> e.getMessage(), "Exception",
> JOptionPane.ERROR_MESSAGE); }
> }
> thread.stop();
> }
>
>
> The problem is that this window is only poped up
> when the results are
> shown.... so I have no clue of what should I do...
> Thanks in advance.
>
>
>
> _______________________________________________
> Advanced-swing mailing list
> [EMAIL PROTECTED]
> http://eos.dk/mailman/listinfo/advanced-swing
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