ggiJoinInputs
Section: GGI (3)
Updated: 2006-12-30
Page Index
NAME
ggiJoinInputs,
ggiEventPoll,
ggiEventSelect,
ggiEventsQueued,
ggiEventRead,
ggiSetEventMask,
ggiGetEventMask,
ggiAddEventMask,
ggiRemoveEventMask : Event management for LibGGI visual
SYNOPSIS
#include <ggi/ggi.h>
gii_event_mask ggiEventPoll(ggi_visual_t vis, gii_event_mask mask,
struct timeval *t);
int ggiEventsQueued(ggi_visual_t vis, gii_event_mask mask);
int ggiEventRead(ggi_visual_t vis, gii_event *ev,
gii_event_mask mask);
int ggiSetEventMask(ggi_visual_t vis, gii_event_mask evm);
gii_event_mask ggiGetEventMask(ggi_visual_t vis);
gii_input_t ggiJoinInputs(ggi_visual_t vis, gii_input_t inp);
#define ggiAddEventMask(vis,mask) \
ggiSetEventMask((vis), ggiGetEventMask((vis)) | (mask))
#define ggiRemoveEventMask(vis,mask) \
ggiSetEventMask((vis), ggiGetEventMask((vis)) & ~(mask))
DESCRIPTION
LibGGI provides input facilities through an auxiliary library, LibGII.
Each LibGGI visual internally contains a
gii_input_t input, and all
LibGII functions are available to manipulate and process inputs. The
LibGGI versions provided of most LibGII functions simply take a
ggi_visual_t rather than
gii_input_t for convenience during
everyday usage. Events are LibGII types. All other semantics are the
same; see
libgii(7) for details.
-
Important:
By default LibGGI visuals autodetect and open the appropriate
inputs, including mouse and keyboard and any other inputs that are
under the X target. Thus in the usual cases there is no need to
open a LibGII gii_input_t directly (and that may in fact fail
because an input device is already open). The LibGGI ggiEvent*
functions must be used to do event handling with LibGGI visuals,
and provide adequate support for most everyday, single-visual
usage.
Advanced management of input sources is accomplished by detaching
the input from the visual and using LibGII functions on the
separate visual handle (see ggiDetachInput(3)). This is
encouraged, for example, when joining inputs from multiple
visuals, because when two visuals share the same joined input, you
cannot ggiClose both of the visuals (a fatal error will result,
because closing the first visual closes both of the joined inputs
and leaves the second closed visual with a stale input handle.)
RETURN VALUE
See return values of
giiJoinInputs(3),
giiEventPoll(3),
giiEventSelect(3),
giiEventsQueued(3),
giiEventRead(3),
giiSetEventMask(3),
giiGetEventMask(3),
giiAddEventMask(3),
giiRemoveEventMask(3)
SEE ALSO
ggiGetInput(3),
giiEventPoll(3),
giiSetEventMask(3)