From: Andrew Apted <ajapted@netspace.net.au>
  To  : ggi-develop@eskimo.com
  Date: Tue, 28 Jul 1998 22:53:58 +1000

Re: New event type of gwt-only event ?

Rodolphe writes:

>  Boujour a tous,
>  
>  sooner or later (maybe in the middle :-), I will have to provide
>  a new event type within libgwt. (GWT=Generic Windowing Toolkit, so
>  you may guess that this event will be something like a WINDOW_EXPOSED
>  event).

Such an event already exists in the devel repository: evExpose.
At least the fbdev target generates it (on VT switch-back), I don't know
about the X targets or whatever.  It includes (x,y) and (w,h) fields
which say what part was exposed.

>  What is the best aproach:
>   1- add a _new_ "virtual" GGI event ?
>  BTW: are there differences (even theoretical) between libggi events and
>  kii events ?
>   2- supply custom libgwt-only events ?

Custom events are easy, just use "evInformation" events for events that
just contain information, and "evCommand" events for things that say "do
something !".  These events share the "ggi_cmd_event" structure, which
have a "code" field which distinguishes the event.  All you need is some
libgwt-special value, like having "wt" in the upper 16 bits, so that
your events don't accidently collide with someone else's.

>  Could take the opportunity of your answer to provide some details on
>  the GGI event dispatching system ?

What would you like to know ?

Cheers,
_____________________________________________  ____
                                               \  /
  Andrew Apted   <andrew@ggi-project.org>       \/