/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Authored By Matthew Allum <mallum@openedhand.com>
*
* Copyright (C) 2006 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "clutter-keysyms.h"
#include "clutter-keysyms-table.h"
#include "clutter-event.h"
#include "clutter-private.h"
#include "clutter-debug.h"
/**
* SECTION:clutter-event
* @short_description: User and window system events
*
* Windowing events handled by Clutter.
*/
/**
* clutter_event_type:
* @event: a #ClutterEvent
*
* Retrieves the type of the event.
*
* Return value: a #ClutterEventType
*/
ClutterEventType
clutter_event_type (ClutterEvent *event)
{
g_return_val_if_fail (event != NULL, CLUTTER_NOTHING);
return event->type;
}
/**
* clutter_event_get_time:
* @event: a #ClutterEvent
*
* Retrieves the time of the event.
*
* Return value: the time of the event, or %CLUTTER_CURRENT_TIME
*
* Since: 0.4
*/
guint32
clutter_event_get_time (ClutterEvent *event)
{
g_return_val_if_fail (event != NULL, CLUTTER_CURRENT_TIME);
return event->any.time;
}
/**
* clutter_event_get_state:
* @event: a #ClutterEvent
*
* Retrieves the modifier state of the event.
*
* Return value: the modifier state parameter, or 0
*
* Since: 0.4
*/
ClutterModifierType
clutter_event_get_state (ClutterEvent *event)
{
g_return_val_if_fail (event != NULL, 0);
switch (event->type)
{
case CLUTTER_KEY_PRESS:
case CLUTTER_KEY_RELEASE:
return event->key.modifier_state;
case CLUTTER_BUTTON_PRESS:
return event->button.modifier_state;
case CLUTTER_MOTION:
return event->motion.modifier_state;
case CLUTTER_SCROLL:
return event->scroll.modifier_state;
default:
break;
}
return 0;
}
/**
* clutter_event_get_coords:
* @event: a #ClutterEvent
* @x: return location for the X coordinate
* @y: return location for the Y coordinate
*
* Retrieves the coordinates of @event and puts them into @x and @y.
*
* Since: 0.4
*/
void
clutter_event_get_coords (ClutterEvent *event,
gint *x,
gint *y)
{
gint event_x, event_y;
g_return_if_fail (event != NULL);
event_x = event_y = 0;
switch (event->type)
{
case CLUTTER_NOTHING:
case CLUTTER_KEY_PRESS:
case CLUTTER_KEY_RELEASE:
case CLUTTER_STAGE_STATE:
case CLUTTER_DESTROY_NOTIFY:
case CLUTTER_CLIENT_MESSAGE:
case CLUTTER_DELETE:
case CLUTTER_ENTER:
case CLUTTER_LEAVE:
break;
case CLUTTER_BUTTON_PRESS:
case CLUTTER_BUTTON_RELEASE:
event_x = event->button.x;
event_y = event->button.y;
break;
case CLUTTER_MOTION:
event_x = event->motion.x;
event_y = event->motion.y;
break;
case CLUTTER_SCROLL:
event_x = event->scroll.x;
event_y = event->scroll.y;
break;
}
if (x)
*x = event_x;
if (y)
*y = event_y;
}
/**
* clutter_event_get_source:
* @event: a #ClutterEvent
*
* Retrieves the source #ClutterActor the event originated from, or
* NULL if the event has no source.
*
* Return value: a #ClutterActor
*
* Since: 0.6
*/
ClutterActor*
clutter_event_get_source (ClutterEvent *event)
{
g_return_val_if_fail (event != NULL, NULL);
return event->any.source;
}
/**
* clutter_event_get_stage:
* @event: a #ClutterEvent
*
* Retrieves the source #ClutterStage the event originated for, or
* NULL if the event has no stage.
*
* Return value: a #ClutterStage
*
* Since: 0.8
*/
ClutterStage*
clutter_event_get_stage (ClutterEvent *event)
{
g_return_val_if_fail (event != NULL, NULL);
return event->any.stage;
}
/**
* clutter_button_event_button:
* @buttev: a #ClutterButtonEvent
*
* Retrieve the button number of the event.
*
* Return value: the button number.
*
* Since: 0.4
*/
guint32
clutter_button_event_button (ClutterButtonEvent *buttev)
{
g_return_val_if_fail (buttev != NULL, 0);
return buttev->button;
}
/* keys */
/**
* clutter_key_event_symbol:
* @keyev: A #ClutterKeyEvent
*
* Retrieves the value of the key that caused @keyev.
*
* Return value: The keysym representing the key
*/
guint
clutter_key_event_symbol (ClutterKeyEvent *keyev)
{
g_return_val_if_fail (keyev != NULL, 0);
return keyev->keyval;
}
/**
* clutter_key_event_code:
* @keyev: A #ClutterKeyEvent
*
* Retrieves the keycode of the key that caused @keyev.
*
* Return value: The keycode representing the key
*/
guint16
clutter_key_event_code (ClutterKeyEvent *keyev)
{
g_return_val_if_fail (keyev != NULL, 0);
return keyev->hardware_keycode;
}
/**
* clutter_key_event_unicode:
* @keyev: A #ClutterKeyEvent
*
* Retrieves the unicode value for the key that caused @keyev.
*
* Return value: The unicode value representing the key
*/
guint32
clutter_key_event_unicode (ClutterKeyEvent *keyev)
{
g_return_val_if_fail (keyev != NULL, 0);
if (keyev->unicode_value)
return keyev->unicode_value;
else
return clutter_keysym_to_unicode (keyev->keyval);
}
/**
* clutter_keysym_to_unicode:
* @keyval: a clutter key symbol
*
* Convert from a Clutter key symbol to the corresponding ISO10646 (Unicode)
* character.
*
* Return value: the corresponding unicode character, or 0 if there
* is no corresponding character.
**/
guint32
clutter_keysym_to_unicode (guint keyval)
{
int min = 0;
int max = G_N_ELEMENTS (clutter_keysym_to_unicode_tab) - 1;
int mid;
/* First check for Latin-1 characters (1:1 mapping) */
if ((keyval >= 0x0020 && keyval <= 0x007e) ||
(keyval >= 0x00a0 && keyval <= 0x00ff))
return keyval;
/* Also check for directly encoded 24-bit UCS characters:
*/
if ((keyval & 0xff000000) == 0x01000000)
return keyval & 0x00ffffff;
/* binary search in table */
while (max >= min) {
mid = (min + max) / 2;
if (clutter_keysym_to_unicode_tab[mid].keysym < keyval)
min = mid + 1;
else if (clutter_keysym_to_unicode_tab[mid].keysym > keyval)
max = mid - 1;
else {
/* found it */
return clutter_keysym_to_unicode_tab[mid].ucs;
}
}
/* No matching Unicode value found */
return 0;
}
/**
* clutter_event_get_device_id:
* @event: a clutter event
*
* Retrieves the events device id if set.
*
* Return value: A unique identifier for the device or -1 if the event has
* no specific device set.
**/
gint
clutter_event_get_device_id (ClutterEvent *event)
{
ClutterInputDevice *device = NULL;
g_return_val_if_fail (event != NULL, -1);
switch (event->type)
{
case CLUTTER_NOTHING:
case CLUTTER_STAGE_STATE:
case CLUTTER_DESTROY_NOTIFY:
case CLUTTER_CLIENT_MESSAGE:
case CLUTTER_DELETE:
case CLUTTER_ENTER:
case CLUTTER_LEAVE:
break;
case CLUTTER_BUTTON_PRESS:
case CLUTTER_BUTTON_RELEASE:
device = event->button.device;
break;
case CLUTTER_MOTION:
device = event->motion.device;
break;
case CLUTTER_SCROLL:
device = event->scroll.device;
break;
case CLUTTER_KEY_PRESS:
case CLUTTER_KEY_RELEASE:
break;
}
if (device)
return device->id;
else
return -1;
}
GType
clutter_event_get_type (void)
{
static GType our_type = 0;
if (!our_type)
our_type = g_boxed_type_register_static (I_("ClutterEvent"),
(GBoxedCopyFunc) clutter_event_copy,
(GBoxedFreeFunc) clutter_event_free);
return our_type;
}
/**
* clutter_event_new:
* @type: The type of event.
*
* Creates a new #ClutterEvent of the specified type.
*
* Return value: A newly allocated #ClutterEvent.
*/
ClutterEvent *
clutter_event_new (ClutterEventType type)
{
ClutterEvent *new_event;
new_event = g_slice_new0 (ClutterEvent);
new_event->type = new_event->any.type = type;
return new_event;
}
/**
* clutter_event_copy:
* @event: A #ClutterEvent.
*
* Copies @event.
*
* Return value: A newly allocated #ClutterEvent
*/
ClutterEvent *
clutter_event_copy (ClutterEvent *event)
{
ClutterEvent *new_event;
g_return_val_if_fail (event != NULL, NULL);
new_event = clutter_event_new (CLUTTER_NOTHING);
*new_event = *event;
/* deep copies or references must be added here */
switch (new_event->type)
{
case CLUTTER_ENTER:
case CLUTTER_LEAVE:
if (new_event->crossing.related)
g_object_ref (new_event->crossing.related);
break;
default:
break;
}
return new_event;
}
/**
* clutter_event_free:
* @event: A #ClutterEvent.
*
* Frees all resources used by @event.
*/
void
clutter_event_free (ClutterEvent *event)
{
if (G_LIKELY (event))
{
if ((event->type == CLUTTER_LEAVE || event->type == CLUTTER_ENTER) &&
event->crossing.related)
g_object_unref (event->crossing.related);
g_slice_free (ClutterEvent, event);
}
}
/**
* clutter_event_get:
*
* Pops an event off the event queue. Applications should not need to call
* this.
*
* Return value: A #ClutterEvent or NULL if queue empty
*
* Since: 0.4
*/
ClutterEvent *
clutter_event_get (void)
{
ClutterMainContext *context = clutter_context_get_default ();
if (!context->events_queue)
return NULL;
if (g_queue_is_empty (context->events_queue))
return NULL;
return g_queue_pop_tail (context->events_queue);
}
/**
* clutter_event_peek:
*
* Returns a pointer to the first event from the event queue but
* does not remove it.
*
* Return value: A #ClutterEvent or NULL if queue empty.
*
* Since: 0.4
*/
ClutterEvent *
clutter_event_peek (void)
{
ClutterMainContext *context = clutter_context_get_default ();
g_return_val_if_fail (context != NULL, NULL);
if (context->events_queue == NULL)
return NULL;
if (g_queue_is_empty (context->events_queue))
return NULL;
return g_queue_peek_tail (context->events_queue);
}
/**
* clutter_event_put:
* @event: a #ClutterEvent
*
* Puts a copy of the event on the back of the event queue. The event will have
* the #CLUTTER_EVENT_FLAG_SYNTHETIC flag set. If the source is set event
* signals will be emitted for this source and capture/bubbling for it's
* ancestors. If the source is not set it will be generated by picking or use
* the actor that currently has keyboard focus.
*
* Since: 0.6
*/
void
clutter_event_put (ClutterEvent *event)
{
ClutterMainContext *context = clutter_context_get_default ();
ClutterEvent *event_copy;
/* FIXME: check queue is valid */
g_return_if_fail (context != NULL);
event_copy = clutter_event_copy (event);
event_copy->any.flags |= CLUTTER_EVENT_FLAG_SYNTHETIC;
g_queue_push_head (context->events_queue, event_copy);
}
/**
* clutter_events_pending:
*
* Checks if events are pending in the event queue.
*
* Return value: TRUE if there are pending events, FALSE otherwise.
*
* Since: 0.4
*/
gboolean
clutter_events_pending (void)
{
ClutterMainContext *context = clutter_context_get_default ();
g_return_val_if_fail (context != NULL, FALSE);
if (!context->events_queue)
return FALSE;
return g_queue_is_empty (context->events_queue) == FALSE;
}