mirror of
https://github.com/brl/mutter.git
synced 2024-11-25 09:30:45 -05:00
0eeb61f3a8
Instead of requiring a call to clutter_content_get_preferred_size(), we can simply pass the canvas size to the Canvas::draw signal.
306 lines
8.4 KiB
C
306 lines
8.4 KiB
C
/*
|
|
* Clutter.
|
|
*
|
|
* An OpenGL based 'interactive canvas' library.
|
|
*
|
|
* Copyright (C) 2011 Intel Corporation.
|
|
*
|
|
* 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, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
* Author:
|
|
* Emmanuele Bassi <ebassi@linux.intel.com>
|
|
*/
|
|
|
|
/**
|
|
* SECTION:clutter-content
|
|
* @Title: ClutterContent
|
|
* @Short_Description: Delegate for painting the content of an actor
|
|
*
|
|
* #ClutterContent is an interface to implement types responsible for
|
|
* painting the content of a #ClutterActor.
|
|
*
|
|
* Multiple actors can use the same #ClutterContent instance, in order
|
|
* to share the resources associated with painting the same content.
|
|
*
|
|
* #ClutterContent is available since Clutter 1.10.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "clutter-content-private.h"
|
|
|
|
#include "clutter-debug.h"
|
|
#include "clutter-marshal.h"
|
|
#include "clutter-private.h"
|
|
|
|
typedef struct _ClutterContentIface ClutterContentInterface;
|
|
|
|
enum
|
|
{
|
|
ATTACHED,
|
|
DETACHED,
|
|
|
|
LAST_SIGNAL
|
|
};
|
|
|
|
static GQuark quark_content_actors = 0;
|
|
|
|
static guint content_signals[LAST_SIGNAL] = { 0, };
|
|
|
|
G_DEFINE_INTERFACE (ClutterContent, clutter_content, G_TYPE_OBJECT)
|
|
|
|
static gboolean
|
|
clutter_content_real_get_preferred_size (ClutterContent *content,
|
|
gfloat *width,
|
|
gfloat *height)
|
|
{
|
|
if (width != NULL)
|
|
*width = 0.f;
|
|
|
|
if (height != NULL)
|
|
*height = 0.f;
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static void
|
|
clutter_content_real_attached (ClutterContent *content,
|
|
ClutterActor *actor)
|
|
{
|
|
}
|
|
|
|
static void
|
|
clutter_content_real_detached (ClutterContent *content,
|
|
ClutterActor *actor)
|
|
{
|
|
}
|
|
|
|
static void
|
|
clutter_content_real_invalidate (ClutterContent *content)
|
|
{
|
|
}
|
|
|
|
static void
|
|
clutter_content_real_paint_content (ClutterContent *content,
|
|
ClutterActor *actor,
|
|
ClutterPaintNode *context)
|
|
{
|
|
}
|
|
|
|
static void
|
|
clutter_content_default_init (ClutterContentInterface *iface)
|
|
{
|
|
quark_content_actors = g_quark_from_static_string ("-clutter-content-actors");
|
|
|
|
iface->get_preferred_size = clutter_content_real_get_preferred_size;
|
|
iface->paint_content = clutter_content_real_paint_content;
|
|
iface->attached = clutter_content_real_attached;
|
|
iface->detached = clutter_content_real_detached;
|
|
iface->invalidate = clutter_content_real_invalidate;
|
|
|
|
/**
|
|
* ClutterContent::attached:
|
|
* @content: the object that emitted the signal
|
|
* @actor: a #ClutterActor
|
|
*
|
|
* This signal is emitted each time a #ClutterContent implementation is
|
|
* assigned to a #ClutterActor.
|
|
*
|
|
* Since: 1.10
|
|
*/
|
|
content_signals[ATTACHED] =
|
|
g_signal_new (I_("attached"),
|
|
G_TYPE_FROM_INTERFACE (iface),
|
|
G_SIGNAL_RUN_FIRST,
|
|
G_STRUCT_OFFSET (ClutterContentIface, attached),
|
|
NULL, NULL,
|
|
_clutter_marshal_VOID__OBJECT,
|
|
G_TYPE_NONE, 1,
|
|
CLUTTER_TYPE_ACTOR);
|
|
|
|
/**
|
|
* ClutterContent::detached:
|
|
* @content: the object that emitted the signal
|
|
* @actor: a #ClutterActor
|
|
*
|
|
* This signal is emitted each time a #ClutterContent implementation is
|
|
* removed from a #ClutterActor.
|
|
*
|
|
* Since: 1.10
|
|
*/
|
|
content_signals[DETACHED] =
|
|
g_signal_new (I_("detached"),
|
|
G_TYPE_FROM_INTERFACE (iface),
|
|
G_SIGNAL_RUN_FIRST,
|
|
G_STRUCT_OFFSET (ClutterContentIface, detached),
|
|
NULL, NULL,
|
|
_clutter_marshal_VOID__OBJECT,
|
|
G_TYPE_NONE, 1,
|
|
CLUTTER_TYPE_ACTOR);
|
|
}
|
|
|
|
/**
|
|
* clutter_content_invalidate:
|
|
* @content: a #ClutterContent
|
|
*
|
|
* Invalidates a #ClutterContent.
|
|
*
|
|
* This function should be called by #ClutterContent implementations when
|
|
* they change the way a the content should be painted regardless of the
|
|
* actor state.
|
|
*
|
|
* Since: 1.10
|
|
*/
|
|
void
|
|
clutter_content_invalidate (ClutterContent *content)
|
|
{
|
|
GHashTable *actors;
|
|
GHashTableIter iter;
|
|
gpointer key_p, value_p;
|
|
|
|
g_return_if_fail (CLUTTER_IS_CONTENT (content));
|
|
|
|
CLUTTER_CONTENT_GET_IFACE (content)->invalidate (content);
|
|
|
|
actors = g_object_get_qdata (G_OBJECT (content), quark_content_actors);
|
|
if (actors == NULL)
|
|
return;
|
|
|
|
g_hash_table_iter_init (&iter, actors);
|
|
while (g_hash_table_iter_next (&iter, &key_p, &value_p))
|
|
{
|
|
ClutterActor *actor = key_p;
|
|
|
|
g_assert (actor != NULL);
|
|
|
|
clutter_actor_queue_redraw (actor);
|
|
}
|
|
}
|
|
|
|
/*< private >
|
|
* _clutter_content_attached:
|
|
* @content: a #ClutterContent
|
|
* @actor: a #ClutterActor
|
|
*
|
|
* Attaches @actor to the @content.
|
|
*
|
|
* This function should be used internally every time a #ClutterActor
|
|
* is associated to a #ClutterContent, to set up a backpointer from
|
|
* the @content to the @actor.
|
|
*
|
|
* This function will invoke the #ClutterContentIface.attached() virtual
|
|
* function.
|
|
*/
|
|
void
|
|
_clutter_content_attached (ClutterContent *content,
|
|
ClutterActor *actor)
|
|
{
|
|
GObject *obj = G_OBJECT (content);
|
|
GHashTable *actors;
|
|
|
|
actors = g_object_get_qdata (obj, quark_content_actors);
|
|
if (actors == NULL)
|
|
{
|
|
actors = g_hash_table_new (NULL, NULL);
|
|
g_object_set_qdata_full (obj, quark_content_actors,
|
|
actors,
|
|
(GDestroyNotify) g_hash_table_unref);
|
|
}
|
|
|
|
g_hash_table_insert (actors, actor, actor);
|
|
|
|
g_signal_emit (content, content_signals[ATTACHED], 0, actor);
|
|
}
|
|
|
|
/*< private >
|
|
* _clutter_content_detached:
|
|
* @content: a #ClutterContent
|
|
* @actor: a #ClutterActor
|
|
*
|
|
* Detaches @actor from @content.
|
|
*
|
|
* This function should be used internally every time a #ClutterActor
|
|
* removes the association with a #ClutterContent.
|
|
*
|
|
* This function will invoke the #ClutterContentIface.detached() virtual
|
|
* function.
|
|
*/
|
|
void
|
|
_clutter_content_detached (ClutterContent *content,
|
|
ClutterActor *actor)
|
|
{
|
|
GObject *obj = G_OBJECT (content);
|
|
GHashTable *actors;
|
|
|
|
actors = g_object_get_qdata (obj, quark_content_actors);
|
|
g_assert (actors != NULL);
|
|
|
|
g_hash_table_remove (actors, actor);
|
|
|
|
if (g_hash_table_size (actors) == 0)
|
|
g_object_set_qdata (obj, quark_content_actors, NULL);
|
|
|
|
g_signal_emit (content, content_signals[DETACHED], 0, actor);
|
|
}
|
|
|
|
/*< private >
|
|
* _clutter_content_paint_content:
|
|
* @content: a #ClutterContent
|
|
* @actor: a #ClutterActor
|
|
* @context: a #ClutterPaintNode
|
|
*
|
|
* Creates the render tree for the @content and @actor.
|
|
*
|
|
* This function will invoke the #ClutterContentIface.paint_content()
|
|
* virtual function.
|
|
*/
|
|
void
|
|
_clutter_content_paint_content (ClutterContent *content,
|
|
ClutterActor *actor,
|
|
ClutterPaintNode *node)
|
|
{
|
|
CLUTTER_CONTENT_GET_IFACE (content)->paint_content (content, actor, node);
|
|
}
|
|
|
|
/**
|
|
* clutter_content_get_preferred_size:
|
|
* @content: a #ClutterContent
|
|
* @width: (out): return location for the natural width of the content
|
|
* @height: (out): return location for the natural height of the content
|
|
*
|
|
* Retrieves the natural size of the @content, if any.
|
|
*
|
|
* The natural size of a #ClutterContent is defined as the size the content
|
|
* would have regardless of the allocation of the actor that is painting it,
|
|
* for instance the size of an image data.
|
|
*
|
|
* Return value: %TRUE if the content has a preferred size, and %FALSE
|
|
* otherwise
|
|
*
|
|
* Since: 1.10
|
|
*/
|
|
gboolean
|
|
clutter_content_get_preferred_size (ClutterContent *content,
|
|
gfloat *width,
|
|
gfloat *height)
|
|
{
|
|
g_return_val_if_fail (CLUTTER_IS_CONTENT (content), FALSE);
|
|
|
|
return CLUTTER_CONTENT_GET_IFACE (content)->get_preferred_size (content,
|
|
width,
|
|
height);
|
|
}
|