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How to react on events fired by a JFileChooser?

843804Mar 29 2005 — edited Mar 31 2005
Hello again.

I hava a FileChooser in my application to load an XML-file and then show its contents in a tab of a JTabbedPane.
When the user chooses a file and then clicks on the open-button of the dialog, I want to check if the file exists. In case of a non-existing file I want to show a modal MessageDialog with a corresponding message. During this time the file dialog must not close and stay open until the user cancels the operation or chooses an existing file.

What do I have to do to achieve this? I think I have to add an actionlistener and override the actionPerformed-method of the open-button. But how? Can you perhaps give me a little code example?

Comments

794342
add the indicated line and it should work
(but you may get other problems, look you don't want, color etc)
public static void main(String[] args){
  SwingUtilities.invokeLater(new Runnable(){
    public void run(){
      JDialog.setDefaultLookAndFeelDecorated(true);//<-----------
      new FileChooserSizeTest();
}});
}
843805
Michael_Dunn
yes it works! if I add JDialog.setDefaultLookAndFeelDecorated(true);

but that's the only way you know?
because yes it give me looks and feel problems my project :(
794342
the only other way I've seen is to add a componenLlistener,
and in componentResized() check the dimension - if under the min, reset to min
but I've not seen anyone happy with this solution - the component can be
dragged to small size, then 'snaps back' to the minimum
843805
the only other way I've seen is to add a
componenLlistener,
and in componentResized() check the dimension - if
under the min, reset to min
but I've not seen anyone happy with this solution -
the component can be
dragged to small size, then 'snaps back' to the
minimum
I think one of the changes introduced in Java 6 is that setMinimumSize() on a Window will actually enforce the set size, meaning that the window size will "freeze" if the user tries to make it smaller. I haven't tried this myself though, so I won't vouch for it.
843805
...and I see now that the OP mentions he is already using Java 6, so never mind.
843805
Try creating the file chooser like this
                JFileChooser fc = new JFileChooser(){
                    protected JDialog createDialog(Component parent) throws HeadlessException {
                        JDialog dialog = super.createDialog(parent);
                        dialog.setMinimumSize(new Dimension(200,200));
                        return dialog;
                    }
                };
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Locked on Apr 28 2005
Added on Mar 29 2005
#swing
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