Any way to intercept ALT-F4 to query user to save before quitting?

Troubleshooting General Help
1

Title says it all.

2

LWJGL has a method that you can periodically query to check if the application is attempting to close (by the close button, ALT-F4, etc)



[java]Display.isCloseRequested()[/java]

3

Maybe it’s me, but using this in the update loop doesn’t seem to trigger when hitting ALT-F4.



[java]

@Override

public void simpleUpdate(float tpf) {

if (Display.isCloseRequested()) {

// Query user to save before quitting. For now, just save.

System.out.println(“Saving before quitting.”);

}

[…]

[/java]

4

maybe it happens so fast that System.out.println(); doesnt display ?

5

I traced it with a breakpoint. It didn’t trigger. Besides, even if it were going too fast, the printout would still happen, just lagged.



Anyway, can anyone reproduce it? As I said, maybe it’s me.

6

thats what happens when you hear sbook, this is jme3 not lwjgl, it is not supposed to work.



[java]

@Override

public void destroy()

{

super.destroy();

System.out.println(“Exiting Game”);

}

[/java]



Now it works just override simple application’s destroy.

1 Like
7

Thanks. Works like a charm.

8

It works but anyone wanting to use that; be warned. If the game/app crashes, this will be invoked.