gstreamer/ges/ges-timeline-layer.h
Thibault Saunier 4a881a43d9 layer: Add a method to check if a layer is empty or not
API: ges_timeline_layer_is_empty
2012-04-07 22:24:55 -04:00

125 lines
3.8 KiB
C

/* GStreamer Editing Services
* Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
* 2009 Nokia Corporation
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library 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.
*/
#ifndef _GES_TIMELINE_LAYER
#define _GES_TIMELINE_LAYER
#include <glib-object.h>
#include <ges/ges-types.h>
G_BEGIN_DECLS
#define GES_TYPE_TIMELINE_LAYER ges_timeline_layer_get_type()
#define GES_TIMELINE_LAYER(obj) \
(G_TYPE_CHECK_INSTANCE_CAST ((obj), GES_TYPE_TIMELINE_LAYER, GESTimelineLayer))
#define GES_TIMELINE_LAYER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST ((klass), GES_TYPE_TIMELINE_LAYER, GESTimelineLayerClass))
#define GES_IS_TIMELINE_LAYER(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GES_TYPE_TIMELINE_LAYER))
#define GES_IS_TIMELINE_LAYER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE ((klass), GES_TYPE_TIMELINE_LAYER))
#define GES_TIMELINE_LAYER_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS ((obj), GES_TYPE_TIMELINE_LAYER, GESTimelineLayerClass))
typedef struct _GESTimelineLayerPrivate GESTimelineLayerPrivate;
/**
* GESTimelineLayer:
* @timeline: the #GESTimeline where this layer is being used.
*/
struct _GESTimelineLayer {
GInitiallyUnowned parent;
/*< public >*/
GESTimeline *timeline;
/*< protected >*/
guint32 min_gnl_priority, max_gnl_priority;
GESTimelineLayerPrivate *priv;
/* Padding for API extension */
gpointer _ges_reserved[GES_PADDING];
};
/**
* GESTimelineLayerClass:
* @get_objects: method to get the objects contained in the layer
*
* Subclasses can override the @get_objects if they can provide a more
* efficient way of providing the list of contained #GESTimelineObject(s).
*/
struct _GESTimelineLayerClass {
/*< private >*/
GInitiallyUnownedClass parent_class;
/*< public >*/
/* virtual methods for subclasses */
GList *(*get_objects) (GESTimelineLayer * layer);
/*< private >*/
/* Signals */
void (*object_added) (GESTimelineLayer * layer, GESTimelineObject * object);
void (*object_removed) (GESTimelineLayer * layer, GESTimelineObject * object);
/* Padding for API extension */
gpointer _ges_reserved[GES_PADDING];
};
GType ges_timeline_layer_get_type (void);
GESTimelineLayer* ges_timeline_layer_new (void);
void ges_timeline_layer_set_timeline (GESTimelineLayer * layer,
GESTimeline * timeline);
GESTimeline *
ges_timeline_layer_get_timeline (GESTimelineLayer * layer);
gboolean ges_timeline_layer_add_object (GESTimelineLayer * layer,
GESTimelineObject * object);
gboolean ges_timeline_layer_remove_object (GESTimelineLayer * layer,
GESTimelineObject * object);
void ges_timeline_layer_set_priority (GESTimelineLayer * layer,
guint priority);
gboolean ges_timeline_layer_is_empty (GESTimelineLayer * layer);
guint ges_timeline_layer_get_priority (GESTimelineLayer * layer);
gboolean ges_timeline_layer_get_auto_transition (GESTimelineLayer * layer);
void ges_timeline_layer_set_auto_transition (GESTimelineLayer * layer,
gboolean auto_transition);
GList* ges_timeline_layer_get_objects (GESTimelineLayer * layer);
G_END_DECLS
#endif /* _GES_TIMELINE_LAYER */