mutter/clutter/eglnative/clutter-event-egl.c
Matthew Allum 410f40b578 2007-07-12 Matthew Allum <mallum@openedhand.com>
* clutter/eglnative/clutter-event-egl.c: (clutter_event_dispatch):
        Avoid sending too many events which are just pressure changes.
2007-07-12 11:30:56 +00:00

228 lines
6.4 KiB
C

/* Clutter.
* An OpenGL based 'interactive canvas' library.
* Authored By Matthew Allum <mallum@openedhand.com>
* Copyright (C) 2006-2007 OpenedHand
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include "clutter-stage-egl.h"
#include "clutter-backend-egl.h"
#include "clutter-egl.h"
#include "../clutter-backend.h"
#include "../clutter-event.h"
#include "../clutter-private.h"
#include "../clutter-debug.h"
#include "../clutter-main.h"
#include <string.h>
#include <glib.h>
#ifdef HAVE_TSLIB
#include <tslib.h>
#endif
typedef struct _ClutterEventSource ClutterEventSource;
struct _ClutterEventSource
{
GSource source;
ClutterBackend *backend;
GPollFD event_poll_fd;
#ifdef HAVE_TSLIB
struct tsdev *ts_device;
#endif
};
static gboolean clutter_event_prepare (GSource *source,
gint *timeout);
static gboolean clutter_event_check (GSource *source);
static gboolean clutter_event_dispatch (GSource *source,
GSourceFunc callback,
gpointer user_data);
static GList *event_sources = NULL;
static GSourceFuncs event_funcs = {
clutter_event_prepare,
clutter_event_check,
clutter_event_dispatch,
NULL
};
static GSource *
clutter_event_source_new (ClutterBackend *backend)
{
GSource *source = g_source_new (&event_funcs, sizeof (ClutterEventSource));
ClutterEventSource *event_source = (ClutterEventSource *) source;
event_source->backend = backend;
return source;
}
void
_clutter_events_init (ClutterBackend *backend)
{
ClutterBackendEGL *backend_egl = CLUTTER_BACKEND_EGL (backend);
GSource *source;
ClutterEventSource *event_source;
#ifdef HAVE_TSLIB
/* FIXME LEAK on error paths */
source = backend_egl->event_source = clutter_event_source_new (backend);
event_source = (ClutterEventSource *) source;
event_source->ts_device = ts_open(g_getenv("TSLIB_TSDEVICE"), 0);
if (event_source->ts_device)
{
CLUTTER_NOTE (EVENT, "Opened '%s'", g_getenv("TSLIB_TSDEVICE"));
if (ts_config(event_source->ts_device))
{
g_warning ("ts_config() failed");
ts_close (event_source->ts_device);
return;
}
g_source_set_priority (source, CLUTTER_PRIORITY_EVENTS);
event_source->event_poll_fd.fd = ts_fd(event_source->ts_device);
event_source->event_poll_fd.events = G_IO_IN;
event_sources = g_list_prepend (event_sources, event_source);
g_source_add_poll (source, &event_source->event_poll_fd);
g_source_set_can_recurse (source, TRUE);
g_source_attach (source, NULL);
}
else
g_warning ("ts_open() failed opening %s'",
g_getenv("TSLIB_TSDEVICE") ?
g_getenv("TSLIB_TSDEVICE") : "None, TSLIB_TSDEVICE not set");
#endif
}
void
_clutter_events_uninit (ClutterBackend *backend)
{
ClutterBackendEGL *backend_egl = CLUTTER_BACKEND_EGL (backend);
if (backend_egl->event_source)
{
CLUTTER_NOTE (EVENT, "Destroying the event source");
ClutterEventSource *event_source =
(ClutterEventSource *) backend_egl->event_source;
#ifdef HAVE_TSLIB
ts_close (event_source->ts_device);
event_sources = g_list_remove (event_sources,
backend_egl->event_source);
#endif
g_source_destroy (backend_egl->event_source);
g_source_unref (backend_egl->event_source);
backend_egl->event_source = NULL;
}
}
static gboolean
clutter_event_prepare (GSource *source,
gint *timeout)
{
ClutterBackend *backend = ((ClutterEventSource *) source)->backend;
*timeout = -1;
return clutter_events_pending ();
}
static gboolean
clutter_event_check (GSource *source)
{
ClutterEventSource *event_source = (ClutterEventSource *) source;
ClutterBackend *backend = event_source->backend;
return ((event_source->event_poll_fd.revents & G_IO_IN)
|| clutter_events_pending ());
}
static gboolean
clutter_event_dispatch (GSource *source,
GSourceFunc callback,
gpointer user_data)
{
ClutterBackend *backend = ((ClutterEventSource *) source)->backend;
ClutterEventSource *event_source = (ClutterEventSource *) source;
ClutterEvent *event;
struct ts_sample tsevent;
ClutterMainContext *clutter_context;
static gint last_x, last_y;
clutter_context = clutter_context_get_default ();
#ifdef HAVE_TSLIB
/* FIXME while would be better here but need to deal with lockups */
if ((!clutter_events_pending()) &&
(ts_read(event_source->ts_device, &tsevent, 1) == 1))
{
/* Avoid sending too many events which are just pressure changes.
* We dont current handle pressure in events (FIXME) and thus
* event_button_generate gets confused generating lots of double
* and triple clicks.
*/
if (tsevent.pressure && last_x == tsevent.x && last_y == tsevent.y)
return;
event = clutter_event_new (CLUTTER_NOTHING);
last_x = event->button.x = tsevent.x;
last_y = event->button.y = tsevent.y;
event->button.time = 0;
event->button.modifier_state = 0;
event->button.button = 1;
if (tsevent.pressure)
event->button.type = event->type = CLUTTER_BUTTON_PRESS;
else
event->button.type = event->type = CLUTTER_BUTTON_RELEASE;
_clutter_event_button_generate (backend, event);
g_queue_push_head (clutter_context->events_queue, event);
}
#endif
/* Pop an event off the queue if any */
event = clutter_event_get ();
if (event)
{
/* forward the event into clutter for emission etc. */
clutter_do_event (event);
clutter_event_free (event);
}
return TRUE;
}