🚀 go-pugleaf

On Thu, 20 Jul 2000 16:00:09 +0300, X_Aki Nieminen_X wrote:

> Now I am having problems with the following feature.
> I want to cancel termination of application in
> "windowclosing" event, but it does not work as
> expected.
> 
> If I select "yes" from the confirmdialog, then
> application is terminated (windowclosing and
> windowclosed handlers are called).
> 
> If I select "no" from the confirmdialog, then
> application keeps running BUT still main window
> dissapear from the screen. Main window is a subclass
> of JFrame.
> 
> How to cancel terminaton and still keep main window visible on screen?

JFrame implements a default response to the close button.  You can tell 
it how to behave with the setDefaultCloseOperation() method.  The valid 
arguments are: DISPOSE_ON_CLOSE, DO_NOTHING_ON_CLOSE, HIDE_ON_CLOSE, and 
EXIT_ON_CLOSE.  The default is HIDE_ON_CLOSE, which explains the behavior 
you are seeing.

The first three work with JDK 1.2, and the last one (EXIT_ON_CLOSE) was 
(sort of) added with JDK 1.3.  The implementation of EXIT_ON_CLOSE was 
actually added in JDK 1.2, but the constant was not defined until JDK 1.3 
(pretty strange, huh?).  That means you can compile a program that uses 
this value only with JDK 1.3, but it will run under JDK 1.2.  You can 
also specify the value 3 and then the program will compile under 1.2.

-- 
Regards,

John McGrath