294 lines
7.5 KiB
C
294 lines
7.5 KiB
C
/* Clutter.
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* An OpenGL based 'interactive canvas' library.
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* Authored By Matthew Allum <mallum@openedhand.com>
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* Copyright (C) 2006-2007 OpenedHand
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "clutter-backend-egl.h"
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#include "clutter-egl.h"
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#include "clutter-backend.h"
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#include "clutter-event-private.h"
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#include "clutter-private.h"
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#include "clutter-debug.h"
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#include "clutter-main.h"
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#include <string.h>
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#include <glib.h>
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#ifdef HAVE_TSLIB
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#include <tslib.h>
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#endif
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typedef struct _ClutterEventSource ClutterEventSource;
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struct _ClutterEventSource
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{
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GSource source;
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ClutterBackendEGL *backend;
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GPollFD event_poll_fd;
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#ifdef HAVE_TSLIB
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struct tsdev *ts_device;
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#endif
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};
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#ifdef HAVE_TSLIB
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static gboolean clutter_event_prepare (GSource *source,
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gint *timeout);
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static gboolean clutter_event_check (GSource *source);
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static gboolean clutter_event_dispatch (GSource *source,
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GSourceFunc callback,
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gpointer user_data);
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static GList *event_sources = NULL;
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static GSourceFuncs event_funcs = {
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clutter_event_prepare,
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clutter_event_check,
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clutter_event_dispatch,
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NULL
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};
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static GSource *
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clutter_event_source_new (ClutterBackendEGL *backend)
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{
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GSource *source = g_source_new (&event_funcs, sizeof (ClutterEventSource));
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ClutterEventSource *event_source = (ClutterEventSource *) source;
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event_source->backend = backend;
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return source;
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}
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static guint32
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get_backend_time (void)
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{
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ClutterBackendEGL *backend_egl;
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backend_egl = CLUTTER_BACKEND_EGL (clutter_get_default_backend ());
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return g_timer_elapsed (backend_egl->event_timer, NULL) * 1000;
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}
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#endif
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void
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_clutter_events_tslib_init (ClutterBackendEGL *backend_egl)
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{
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#ifdef HAVE_TSLIB
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ClutterEventSource *event_source;
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const char *device_name;
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GSource *source;
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CLUTTER_NOTE (EVENT, "Starting timer");
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g_assert (backend_egl->event_timer != NULL);
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g_timer_start (backend_egl->event_timer);
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source = backend_egl->event_source = clutter_event_source_new (backend_egl);
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event_source = (ClutterEventSource *) source;
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device_name = g_getenv ("TSLIB_TSDEVICE");
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if (device_name == NULL || device_name[0] == '\0')
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{
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g_warning ("No device for TSLib has been defined; please set the "
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"TSLIB_TSDEVICE environment variable to define a touch "
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"screen device to be used with Clutter.");
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g_source_unref (source);
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return;
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}
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event_source->ts_device = ts_open (device_name, 0);
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if (event_source->ts_device)
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{
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CLUTTER_NOTE (EVENT, "Opened '%s'", device_name);
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if (ts_config (event_source->ts_device))
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{
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g_warning ("Closing device '%s': ts_config() failed", device_name);
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ts_close (event_source->ts_device);
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g_source_unref (source);
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return;
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}
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g_source_set_priority (source, CLUTTER_PRIORITY_EVENTS);
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event_source->event_poll_fd.fd = ts_fd (event_source->ts_device);
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event_source->event_poll_fd.events = G_IO_IN;
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event_sources = g_list_prepend (event_sources, event_source);
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g_source_add_poll (source, &event_source->event_poll_fd);
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g_source_set_can_recurse (source, TRUE);
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g_source_attach (source, NULL);
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}
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else
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{
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g_warning ("Unable to open '%s'", device_name);
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g_source_unref (source);
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}
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#endif /* HAVE_TSLIB */
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}
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void
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_clutter_events_egl_uninit (ClutterBackendEGL *backend_egl)
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{
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#ifdef HAVE_TSLIB
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if (backend_egl->event_timer != NULL)
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{
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CLUTTER_NOTE (EVENT, "Stopping the timer");
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g_timer_stop (backend_egl->event_timer);
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}
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if (backend_egl->event_source != NULL)
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{
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CLUTTER_NOTE (EVENT, "Destroying the event source");
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ClutterEventSource *event_source =
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(ClutterEventSource *) backend_egl->event_source;
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ts_close (event_source->ts_device);
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event_sources = g_list_remove (event_sources, backend_egl->event_source);
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g_source_destroy (backend_egl->event_source);
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g_source_unref (backend_egl->event_source);
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backend_egl->event_source = NULL;
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}
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#endif /* HAVE_TSLIB */
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}
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#ifdef HAVE_TSLIB
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static gboolean
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clutter_event_prepare (GSource *source,
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gint *timeout)
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{
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gboolean retval;
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clutter_threads_enter ();
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*timeout = -1;
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retval = clutter_events_pending ();
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clutter_threads_leave ();
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return retval;
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}
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static gboolean
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clutter_event_check (GSource *source)
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{
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ClutterEventSource *event_source = (ClutterEventSource *) source;
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gboolean retval;
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clutter_threads_enter ();
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retval = ((event_source->event_poll_fd.revents & G_IO_IN) ||
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clutter_events_pending ());
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clutter_threads_leave ();
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return retval;
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}
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static gboolean
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clutter_event_dispatch (GSource *source,
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GSourceFunc callback,
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gpointer user_data)
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{
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ClutterEventSource *event_source = (ClutterEventSource *) source;
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struct ts_sample tsevent;
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ClutterEvent *event;
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clutter_threads_enter ();
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/* FIXME while would be better here but need to deal with lockups */
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if ((!clutter_events_pending()) &&
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(ts_read(event_source->ts_device, &tsevent, 1) == 1))
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{
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static gint last_x = 0, last_y = 0;
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static gboolean clicked = FALSE;
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/* Avoid sending too many events which are just pressure changes.
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*
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* FIXME - We don't current handle pressure in events and thus
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* event_button_generate gets confused generating lots of double
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* and triple clicks.
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*/
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if (tsevent.pressure && last_x == tsevent.x && last_y == tsevent.y)
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goto out;
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event = clutter_event_new (CLUTTER_NOTHING);
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event->any.stage = clutter_stage_get_default ();
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last_x = event->button.x = tsevent.x;
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last_y = event->button.y = tsevent.y;
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if (tsevent.pressure && !clicked)
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{
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event->button.type = event->type = CLUTTER_BUTTON_PRESS;
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event->button.time = get_backend_time ();
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event->button.modifier_state = 0;
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event->button.button = 1;
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clicked = TRUE;
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}
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else if (tsevent.pressure && clicked)
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{
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event->motion.type = event->type = CLUTTER_MOTION;
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event->motion.time = get_backend_time ();
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event->motion.modifier_state = 0;
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}
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else
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{
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event->button.type = event->type = CLUTTER_BUTTON_RELEASE;
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event->button.time = get_backend_time ();
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event->button.modifier_state = 0;
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event->button.button = 1;
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clicked = FALSE;
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}
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_clutter_event_push (event, FALSE);
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}
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/* Pop an event off the queue if any */
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event = clutter_event_get ();
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if (event)
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{
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/* forward the event into clutter for emission etc. */
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clutter_do_event (event);
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clutter_event_free (event);
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}
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out:
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clutter_threads_leave ();
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return TRUE;
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}
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#endif
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