Re: Some problems with popup menus when these should process events

[Fred Kiefer]

On 04.11.2012 18:12, Germán A. Arias wrote:
> El dom, 04-11-2012 a las 17:43 +0100, Fred Kiefer escribió:
> > On 03.11.2012 06:19, Germán A. Arias wrote:
> > > Currently is possible configure a theme to process event in popup menus.
> > > However, if this popup menu is at a window/panel in a modal session. The
> > > popup is displayed, but this is unable to process the events. This
> > > remains displayed and you should restart the app to remove this from the
> > > screen. You can test this on Ink, when save the document and selects the
> > > type of the document.
> >
> > With which theme does this behaviour occur? I tried with the default
> > GNUstep theme and things seem to work as expected.
>
> Currently there isn't a theme that use it. But you can try with Silver
> theme. Download the source code:
>
> http://download.gna.org/gnustep-nonfsf/silver.theme-2.5.tar.gz
>
> And then edit the file Theme.m to add:
>
> - (BOOL) doesProcessEventsForPopUpMenu
> {
>    return YES;
> }
>
> And compile it. If you test it with SystemPreferences, in section
> "Modifier keys" it works perfectly. But no with Ink when you try to
> select other type of file.

I am no expert here, and to state that once more, I would prefer if 
themes would restrict themselves to drawing changes not behaviour 
changes. Greg should be the one to jump in and explain why things behave 
the way they do. That said, I am not surprised that this theme change 
leads to popups that don't respond. When the 
doesProcessEventsForPopUpMenu method returns true the normal event 
handling of the popup button gets disabled. What we do normally is to 
cook up an event that gets passed to the opened menu and triggers mouse 
tracking there. If this does not happen, events may or may not end up in 
the opened popup menu.
What you could try to do here is to set the setWorksWhenModal: property 
of the popup menu window. But even if this works it is only a 
workaround. You should actually be handling the events yourself, if you 
state that you do so.

Fred