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  1. #1
    Majin is offline Member
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    Question Popup usage: SwingWorker Threads?

    Hi,

    I need to popup a warning message if an exception gets caught within the SwingWorker thread I'm currently using. Since it's my understanding that I shouldn't be making component/GUI updates/changes from outside the event dispatcher thread what's the best way to do this?

    I'm thinking it might have something to do with the firePropertyChange method and creating my own property for whether the thread has encountered an error or not. I've never created a property for use with these Listener methods before though and the examples I've read so far are a little confusing. Am I overthinking it? Is there a much simpler way to do this?

  2. #2
    Fubarable's Avatar
    Fubarable is offline Moderator
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    Default

    The simplest is to call the Swing code from within the background thread by directly queuing it on the EDT via the SwingUtilities or EventQueue method, invokeLater(...):

    Java Code:
          java.awt.EventQueue.invokeLater(new Runnable() {
             public void run() {
                // call your Swing code here.
             }
          });
    But having said that, using a listener could work too and probably be more elegant (the worker only worries about notifying and the control handles what the GUI should display when notified), and SwingWorkers are so built to make this pretty easy to do.

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