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Re: gtk 3 stuck menu bug on Mac




On Sat, Nov 18, 2017 at 3:44 PM, Christian Schoenebeck
<schoenebeck@xxxxxxxxxxxxxxxx> wrote:
> On Freitag, 17. November 2017 00:51:25 CET Christian Schoenebeck wrote:
>> What I found out so far is that whenever this problem occurs, both of the
>> following two checks in function gtk_menu_motion_notify() (gtkmenu.c) return
>> false and the function is thus aborted at this point:
>>
>>       menu_item = gtk_get_event_widget ((GdkEvent*) event);
>>       ...
>>       if (!GTK_IS_MENU_ITEM (menu_item) ||
>>           !GTK_IS_MENU (parent))
>>           return false;
>
> Looking further at this issue, the problem is probably not a timing issue like
> I first considered in my previous email. Fact is that the wrong widget under
> the mouse pointer is resolved forever whenever this issue starts to occur:
>
> At this code location above, the gtk_menu_motion_notify() function expects
> menu_item to be a "GtkMenuItem" gobject class, however when this issue occurs,
> menu_item is pointing at its parent "GtkMenu" gobject instead.
>
> I would understand if this misbehavior just happens immediately after a new
> menu pops up. But whenever this stuck menu issue occurs, I can continue to
> move the mouse pointer over all the visible menu items for hours and the
> resolved toplevel widget under the mouse pointer (resolved by the Quartz
> implementation) is always the GtkMenu widget instead of the respective
> GtkMenuItem widget.
>
> Since this issue only seems to happen on Mac, and since it worked flawlessly on
> Mac before, and since I see the Quartz implementation hasn't really changed
> (significantly) in the last couple years, was there some kind of important
> change in gtk 3 that still would need to be applied to the Quartz driver?

If I remember correctly I already saw that issue when I started using
gtk+3 on macOS, around 3.16/18.
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