Re: [Gtk-osx-users] Crash on "Quit" in menu.

[John Ralls <jralls ceridwen us>]

On Apr 11, 2011, at 9:32 AM, Mikkel Kruse Johnsen wrote:

> Hi John
> 
> The crash is after NSApplicationWillTerminate, the only way I can get it to not make a crash report, is to Quit Gtk main loop in NSApplicationBlockTermination and return true. Then NSApplicationWillTerminate is never called, but the program exit.
> 
> I don't see the accelerators bypass the Gtk menu, if I keep my normal Gtk menu item with accelerator as cmd-q and hide it, it calls my normal quit function. If I don't have the menuitem, nothing happens when cmd-q is pressed. The same with the other accelerators in main menu and windows menu, they don't work.

Sorry, I meant to say that unless you've called gtk_application_set_use_quartz_accelerators(theApp, FALSE), the gtk menu accelerators are bypassed and the app gets a menu notification direct from Quartz rather than getting a key_down notification for Gtk to turn into a menu event. The catch is that Command-Q is special: There is no gtk menu linked to it like there was in ige-mac-integration. Instead, it uses the stock Apple menu item, which sends the NSApplicationShouldTerminate/NSApplicationWillTerminate NSNotification pair, which are acted on by the handlers in GNSApplicationDelegate and GtkApplicationNotify.

You should have a handler for NSApplicationWillTerminate and call gtk_main_quit() from there, not from NSApplicationBlockTermination. NSApplicationBlockTermination is so that  you can offer the user the opportunity not to quit if she has unsaved work.

You haven't yet provided a crash report (from a debug build, please), but I suspect that you're freeing resources in your NSApplicationBlockTermination handler. Don't do that: Do it in the NSApplicationWillTerminate handler. 

Regards,
John Ralls