progress bar during a critical operation in the event dispatch thread

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#98

From: Tony
Date: Sun, 22 Jan 2006 07:40

48 lines
1850 bytes

Dear all,

I have a question that bothers me. I think I know the answer, but
it's simplicity is making me doubt my reasoning.

I would greatly appreciate if somebody more experienced
could chime in with an opinion.

Tony


Sample code that explains my problem:

startButton.addActionListener(new Action Listener()
{
 public void actionPerformed(ActionEvent e)
 {
  method1();
  method2();
 }
}
);


method1()
{
/*
  I have some long-running operations in this method.
  Is it true that there is no way to display and
  update a progress bar in this method?
*/
}

method2()
{
  /*
  This method contains operations that must not
  be performed until method1 is finished
  */

}

My reasoning:

1. Display and updates of the progress bar are UI operations
    which must take place on a Swing thread.
2. Swing thread will not resume until actionPerformed method
    exits.

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Subject: progress bar during a critical operation in the event dispatch thread
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