bug#9366: Display geometry change hook

[martin rudalics]

>>   > I didn't mean MS-Windows events (a.k.a. "messages"), I meant events in
>>   > the Emacs event queue.  A message coming from the window manager
>>   > doesn't have to be converted to an Emacs event, it can be handled
>>   > directly.
>>
>> You mean that we'd have to put a function running the hook into the
>> event queue when no input is allowed?
>
> Sorry, I don't think I understand this.  Can you explain what you
> mean?
>
>> And running 'gui_set_fullscreen' OTOH can be handled directly?
>
> We already do that, no?

I probably didn't understand what you wrote first.  Let me ask it this
way: Since we can run 'gui_set_fullscreen' directly, then couldn't we
run 'display-geometry-change-hook' directly too?

martin