Re: JButton stays pressed for 1 second, not what I want

From:
"phillip.s.powell@gmail.com" <phillip.s.powell@gmail.com>
Newsgroups:
comp.lang.java.help
Date:
20 Mar 2007 10:24:37 -0700
Message-ID:
<1174411477.857821.229890@e65g2000hsc.googlegroups.com>
On Mar 20, 1:04 pm, Tom Hawtin <use...@tackline.plus.com> wrote:

phillip.s.pow...@gmail.com wrote:

1) setYouSelected()
2) makeMySelection()
3) Thread.sleep(1000)
4) Button becomes "unpressed"
5) Display results
                Thread.sleep(1000);


Everything that happens to the GUI should happen in one thread. That
includes repainting. Sleeping prevents the paint event from being processed.

The way around it is to use javax.swing.Timer (NOT java.util.Timer!).


Would it be something like this:

  /**
     * Handle the value of {@link javax.swing.JButton} pressed
     * @param evt {@link java.awt.event.ActionEvent}
     */
    public void actionPerformed(final ActionEvent evt) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                setYouSelection(evt.getActionCommand()); // STORE
YOUR SELECTION
                timer = new javax.swing.Timer(1000,
buttonPressedListener);
                timer.start();
            }
        });
    }

    private ActionListener buttonPressedListener = new
ActionListener() {
        public void actionPerformed(ActionEvent evt) {
            makeMySelection();
            timer.stop();
            System.out.println("your selection is " +
getYouSelection() + " and the house's is " + getMeSelection());
        }
    };

This seems to work for me just fine!

That will allow you action listener to return normally in good time, the
GUI to repaint, and then another action listener to be run.

The obvious down side is that any other events, such as mouse clicks,
will also get through. Dealing with that is more difficult. A glass pane
is one solution (google it). Another way is to open a small modal dialog
box off screen. Alternatively you can push a new java.awt.EventQueue and
filter events, but that's more difficult.

Tom Hawtin

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