[brailleblaster] Re: Abnormal Termination
- From: "John J. Boyer" <john.boyer@xxxxxxxxxxxxxxxxx>
- To: brailleblaster@xxxxxxxxxxxxx
- Date: Fri, 26 Nov 2010 21:12:34 -0600
Where should a listener for user termination be placed? How does one go
about setting up a listener?
Suppose the JVM detects a fatal runtime error? Is there a way to try to
terminate gracefully?
John
On Sat, Nov 27, 2010 at 01:49:58AM +0000, Michael Whapples wrote:
> It won't throw an exception, its not something unexpected occurring. As
> my memory serves from seeing the SWT samples you have a loop checking
> that the application is still active, when it isn't it exits the loop.
> If its like other toolkits like GTK, you would have a listener for the
> event when the main window is destroyed, which would then tell the
> application its time to exit.
>
> Also on linux you shouldn't kill it with control+c, again go through the
> proper toolkit way of notifying things of exiting, closing the main
> window would seem the logical event to trigger the exit code. As you are
> listening for the window close event you need not know how the user
> caused that, alt+f4, command+q, selecting exit from the menu, etc.
>
> Michael Whapples
> On 27/11/10 01:24, John J. Boyer wrote:
> >I am talking about the Java program as a whole. Alt-f4 terminatges GUI
> >programs on Windows. What is the corresponding keystroke o n the Mac?
> >The subcommands will usually start the GUI in special modes, such as a
> >bare-bones text editor. So if a user hits alt-f4 I suppose the jre will
> >throw an exception. I want to catch that exception and try to terminate
> >gracefully. Can I do it in the main method?
> >
> >John
> >
> >On Fri, Nov 26, 2010 at 11:27:12AM -0800, Alex Jurgensen wrote:
> >>Hi John,
> >>
> >>Are we talking on the command-line or from the GUI? The commands you
> >>listed for the Mac nd Linux are the ones used to xit programs on the
> >>command-line before they have completed.
> >>
> >>Regards,
> >>Alex,
> >>
> >>
> >>On 2010-11-26, at 11:09 AM, John J. Boyer wrote:
> >>
> >>>What happens of someone gets disgusted with the way things are going and
> >>>hits alt-f4 in Windows or control-c in Mac or Linux? Suppose a fatal
> >>>runtime error occurs? What exceptions will Java throw? Can I catch them
> >>>in the main method and attempt to clean things up before exiting?
> >>>
> >>>Thanks,
> >>>John
> >>>
> >>>--
> >>>John J. Boyer; President, Chief Software Developer
> >>>Abilitiessoft, Inc.
> >>>http://www.abilitiessoft.com
> >>>Madison, Wisconsin USA
> >>>Developing software for people with disabilities
> >>>
> >>>
> >>Alex Jurgensen,
> >>VoiceOver Trainer,
> >>ASquared21@xxxxxxxxxxxxxxxxx
> >>
> >>Visit us on the web at: www.vipbc.org
> >>
>
--
John J. Boyer; President, Chief Software Developer
Abilitiessoft, Inc.
http://www.abilitiessoft.com
Madison, Wisconsin USA
Developing software for people with disabilities
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