mutter/clutter/sdl/clutter-event-sdl.c

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/* 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-sdl.h"
#include "clutter-backend-sdl.h"
#include "clutter-sdl.h"
#include "../clutter-backend.h"
#include "../clutter-event.h"
#include "../clutter-private.h"
#include "../clutter-debug.h"
#include "../clutter-main.h"
#include "../clutter-keysyms.h"
#include <string.h>
#include <glib.h>
typedef struct _ClutterEventSource ClutterEventSource;
struct _ClutterEventSource
{
GSource source;
ClutterBackend *backend;
};
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)
{
GSource *source;
ClutterEventSource *event_source;
ClutterBackendSDL *backend_sdl = CLUTTER_BACKEND_SDL (backend);
source = backend_sdl->event_source = clutter_event_source_new (backend);
event_source = (ClutterEventSource *) source;
g_source_set_priority (source, CLUTTER_PRIORITY_EVENTS);
event_sources = g_list_prepend (event_sources, event_source);
g_source_set_can_recurse (source, TRUE);
g_source_attach (source, NULL);
}
void
_clutter_events_uninit (ClutterBackend *backend)
{
ClutterBackendSDL *backend_sdl = CLUTTER_BACKEND_SDL (backend);
if (backend_sdl->event_source)
{
CLUTTER_NOTE (EVENT, "Destroying the event source");
event_sources = g_list_remove (event_sources,
backend_sdl->event_source);
g_source_destroy (backend_sdl->event_source);
g_source_unref (backend_sdl->event_source);
backend_sdl->event_source = NULL;
}
}
static gboolean
clutter_event_prepare (GSource *source,
gint *timeout)
{
SDL_Event events;
int num_events;
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gboolean retval;
clutter_threads_enter ();
num_events = SDL_PeepEvents(&events, 1, SDL_PEEKEVENT, SDL_ALLEVENTS);
if (num_events == 1)
{
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clutter_threads_leave ();
*timeout = 0;
return TRUE;
}
if (num_events == -1)
g_warning("Error polling SDL: %s", SDL_GetError());
*timeout = 50;
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retval = clutter_events_pending ();
clutter_threads_leave ();
return retval;
}
static gboolean
clutter_event_check (GSource *source)
{
SDL_Event events;
int num_events;
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gboolean retval;
clutter_threads_enter ();
/* Pump SDL */
SDL_PumpEvents();
num_events = SDL_PeepEvents(&events, 1, SDL_PEEKEVENT, SDL_ALLEVENTS);
if (num_events == -1)
g_warning("Error polling SDL: %s", SDL_GetError());
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retval = (num_events == 1 || clutter_events_pending ());
clutter_threads_leave ();
return retval;
}
static void
key_event_translate (ClutterEvent *event,
SDL_Event *sdl_event)
{
event->key.time = 0;
/* FIXME: This is just a quick hack to make SDL keys roughly work.
* Fixing it properly is left as a exercise to someone who enjoys
* battleing the SDL API.
*
* We probably need to use sdl_event->key.keysym.unicode to do lookups
* and I have no idea how to get shifted keysyms. It looks quite easy
* if you drop into xlib but that then avoids the whole point of using
* SDL in the first place (More portability than just GLX)
*/
switch(sdl_event->key.keysym.sym)
{
case SDLK_UP: event->key.keyval = CLUTTER_Up; break;
case SDLK_DOWN: event->key.keyval = CLUTTER_Down; break;
case SDLK_LEFT: event->key.keyval = CLUTTER_Left; break;
case SDLK_RIGHT: event->key.keyval = CLUTTER_Right; break;
case SDLK_HOME: event->key.keyval = CLUTTER_Home; break;
case SDLK_END: event->key.keyval = CLUTTER_End; break;
case SDLK_PAGEUP: event->key.keyval = CLUTTER_Page_Up; break;
case SDLK_PAGEDOWN: event->key.keyval = CLUTTER_Page_Down; break;
case SDLK_BACKSPACE: event->key.keyval = CLUTTER_BackSpace; break;
case SDLK_DELETE: event->key.keyval = CLUTTER_Delete; break;
default:
event->key.keyval = sdl_event->key.keysym.sym;
}
event->key.hardware_keycode = sdl_event->key.keysym.scancode;
if (sdl_event->key.keysym.mod & KMOD_CTRL)
event->key.modifier_state
= event->key.modifier_state & CLUTTER_CONTROL_MASK;
if (sdl_event->key.keysym.mod & KMOD_SHIFT)
event->key.modifier_state
= event->key.modifier_state & CLUTTER_SHIFT_MASK;
}
static gboolean
event_translate (ClutterBackend *backend,
ClutterEvent *event,
SDL_Event *sdl_event)
{
gboolean res;
res = TRUE;
switch (sdl_event->type)
{
case SDL_KEYDOWN:
event->type = CLUTTER_KEY_PRESS;
key_event_translate (event, sdl_event);
break;
case SDL_KEYUP:
event->type = CLUTTER_KEY_RELEASE;
key_event_translate (event, sdl_event);
break;
case SDL_MOUSEBUTTONDOWN:
switch (sdl_event->button.button)
{
case 4: /* up */
case 5: /* down */
case 6: /* left */
case 7: /* right */
event->scroll.type = event->type = CLUTTER_SCROLL;
if (sdl_event->button.button == 4)
event->scroll.direction = CLUTTER_SCROLL_UP;
else if (sdl_event->button.button == 5)
event->scroll.direction = CLUTTER_SCROLL_DOWN;
else if (sdl_event->button.button == 6)
event->scroll.direction = CLUTTER_SCROLL_LEFT;
else
event->scroll.direction = CLUTTER_SCROLL_RIGHT;
event->scroll.time = 0;
event->scroll.x = sdl_event->button.x;
event->scroll.y = sdl_event->button.y;
event->scroll.modifier_state = sdl_event->button.state;
break;
default:
event->button.type = event->type = CLUTTER_BUTTON_PRESS;
event->button.time = 0;
event->button.x = sdl_event->button.x;
event->button.y = sdl_event->button.y;
event->button.modifier_state = sdl_event->button.state;
event->button.button = sdl_event->button.button;
_clutter_event_button_generate (backend, event);
break;
}
break;
case SDL_MOUSEBUTTONUP:
/* scroll events don't have a corresponding release */
if (sdl_event->button.button == 4 ||
sdl_event->button.button == 5 ||
sdl_event->button.button == 6 ||
sdl_event->button.button == 7)
{
res = FALSE;
break;
}
event->button.type = event->type = CLUTTER_BUTTON_RELEASE;
event->button.time = 0;
event->button.x = sdl_event->button.x;
event->button.y = sdl_event->button.y;
event->button.modifier_state = sdl_event->button.state;
event->button.button = sdl_event->button.button;
break;
case SDL_MOUSEMOTION:
event->motion.type = event->type = CLUTTER_MOTION;
event->motion.time = 0;
event->motion.x = sdl_event->motion.x;
event->motion.y = sdl_event->motion.y;
event->motion.modifier_state = sdl_event->motion.state;;
break;
default:
res = FALSE;
break;
}
return res;
}
static gboolean
clutter_event_dispatch (GSource *source,
GSourceFunc callback,
gpointer user_data)
{
SDL_Event sdl_event;
ClutterEvent *event = NULL;
ClutterBackend *backend = ((ClutterEventSource *) source)->backend;
ClutterMainContext *clutter_context;
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clutter_threads_enter ();
clutter_context = clutter_context_get_default ();
while (SDL_PollEvent(&sdl_event))
{
/* FIXME: essentially translate events and push them onto the queue
* below will then pop them out via _clutter_events_queue.
*/
if (sdl_event.type == SDL_QUIT)
{
SDL_Quit();
exit(0);
}
else
{
event = clutter_event_new (CLUTTER_NOTHING);
if (event_translate (backend, event, &sdl_event))
{
/* push directly here to avoid copy of queue_put */
g_queue_push_head (clutter_context->events_queue, event);
}
else
{
clutter_event_free (event);
}
}
}
event = clutter_event_get ();
if (event)
{
clutter_do_event(event);
clutter_event_free (event);
}
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clutter_threads_leave ();
return TRUE;
}