Re: JButton is created "s

From:

"Knute Johnson" <knute.johnson@THRWHITE.remove-dii-this>

Newsgroups:

comp.lang.java.gui

Date:

Wed, 27 Apr 2011 15:31:55 GMT

Message-ID:

<UJBKh.24561$Cp1.9226@newsfe14.lga>

To: comp.lang.java.gui
Phil Powell wrote:

On Mar 16, 2:04 pm, Knute Johnson <nos...@rabbitbrush.frazmtn.com>
wrote:

Phil Powell wrote:

On Mar 16, 12:32 pm, Knute Johnson <nos...@rabbitbrush.frazmtn.com>
wrote:

Phil Powell wrote:

      /**
         * Generate value and conditions for {@link #backButton}
         */
        private void generateBackButton() {
            SimpleBrowser.this.backButton = new JButton("<--");
            SimpleBrowser.this.backButton.addActionListener(new
ActionListener() {
                public void actionPerformed(ActionEvent evt) {
                    SwingUtilities.invokeLater(new Runnable() {
                        public void run() {
                            SimpleBrowser.hasClickedBack = true;
                            SimpleBrowser.this.currentHistoryIndex--;
                            SimpleBrowser.this.setURL(
(URL)SimpleBrowser.this.actualHistoryURLVector.get(
SimpleBrowser.this.currentHistoryIndex)
                                    );
SimpleBrowser.this.setURLPath(SimpleBrowser.this.getURL().toString());
SimpleBrowser.this.processor.processURL(SimpleBrowser.this.getURL());
                        }
                    });
                }
            });
            SimpleBrowser.this.backButton.setSelected(false);
SimpleBrowser.this.backButton.setFont(SimpleBrowserGlobals.FONT);
        }
The moment this particular JButton is created it is created as
"selected", even though I have done "setSelected(false)". It does not
fire unless I click onto it, of course, but it appears as if I did and
that's not good. Is there a way I can fix this?
Thanx
Phil

Phil:
You don't need the Runnable inside of the ActionListener to make it run
on the EDT. The ActionListener is running on the EDT.

That I did not know, thanx. Does this also apply to
HyperlinkListener, PopupMenuListener and PropertyChangeListener?

Yes.

Are you sure it is selected and not just in focus?

I tried
SimpleBrowser.this.backButton.setFocusable(false);
But it still comes "focused", or rather, the JButton looks like you
clicked it even though you haven't yet done so.

Something always gets the focus when a GUI is made visible. Just send
the focus to some other component for example your JTextField that takes
the URL string. Do it after the GUI is visible.

Curious. The JButton look is now restored to normal the moment I did
both setFocusable(false) and then immediately after that
setSelected(false).

Normal is what you are trying to change. When the GUI is made visible
the first focusable component takes the focus. When you made the
JButton not focusable some other component took the focus. Focus is
normal behaviour. If you don't want that then fine but it is there so
that you can press the space bar and activate the button.

Selected on a JButton is when you are holding the mouse button
depressed. That has nothing to do with what is happening here.

--

Knute Johnson
email s/nospam/knute/

---
* Synchronet * The Whitehouse BBS --- whitehouse.hulds.com --- check it out free usenet!
--- Synchronet 3.15a-Win32 NewsLink 1.92
Time Warp of the Future BBS - telnet://time.synchro.net:24