Modal window

[scienzia]

Hello,

I would like to show a popup window saying "WAIT" during an operation and I would like to close it when it is finished. The program window should be impossible to use during the operation. How can I do this????

PS: the window shouldn't have any close button

 

[HavaTheJut]

The following class does most of what you are looking for.

class WaitFrame extends JFrame
{

  JFrame mFrame = this;
  Thread mThread;

  public WaitFrame(Thread t)
  {
    mFrame = new JFrame();
    mThread = t;

    // setup frame
    JLabel lblMsg = new JLabel("Please Wait...");

    Container contentPane = mFrame.getContentPane();
    contentPane.setLayout(new GridBagLayout());
    contentPane.add(lblMsg);

    mFrame.setSize(new Dimension(200,100));
    mFrame.setVisible(false);
    mFrame.setDefaultCloseOperation(mFrame.DO_NOTHING_ON_CLOSE);
  }

  public void doWait()
  {
    mFrame.show();

    // start the thread
    mThread.start();

    // make sure the current frame is painted
    Graphics g = mFrame.getGraphics();
    mFrame.paint(g);

    // join the thread (until it finishes or is interrupted)
    try
    {
      mThread.join();
    }
    catch (InterruptedException ie)
    {}

    // close the frame
    mFrame.dispose();
  }
}

then to use it...

// thread to do whatever
Thread t = new Thread()
{
  public void run()
  {
    try
    {
      sleep(3000);
    }
    catch (Exception e)
    {}
  }
};

WaitFrame wf = new WaitFrame(t);
wf.doWait();

Problems I can think of:
1. Clicking on a button in another frame during the wait will not immediately register, but will be executed right after the wait screen closes.
2. The frames are not repainted during the wait.