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timelineelement: Implement the notion of parenting

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This commit is contained in:
Thibault Saunier 2013-01-20 12:58:05 -03:00
parent e3dc877c4b
commit e48b959dde
3 changed files with 103 additions and 12 deletions
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3
docs/libs/ges-sections.txt
View file

@ -322,6 +322,8 @@ GES_TYPE_TIMELINE_LAYER
<TITLE>GESTimelineElement</TITLE>
GESTimelineElement
GESTimelineElementClass
ges_timeline_element_set_parent
ges_timeline_element_get_parent
ges_timeline_element_set_start
ges_timeline_element_set_inpoint
ges_timeline_element_set_duration
@ -332,6 +334,7 @@ ges_timeline_element_ripple_end
ges_timeline_element_roll_start
ges_timeline_element_roll_end
ges_timeline_element_trim
GES_TIMELINE_ELEMENT_PARENT
GES_TIMELINE_ELEMENT_START
GES_TIMELINE_ELEMENT_INPOINT
GES_TIMELINE_ELEMENT_DURATION

78
ges/ges-timeline-element.c
View file

@ -40,6 +40,7 @@ G_DEFINE_ABSTRACT_TYPE_WITH_CODE (GESTimelineElement, ges_timeline_element,
enum
{
PROP_0,
PROP_PARENT,
PROP_START,
PROP_INPOINT,
PROP_DURATION,
@ -62,6 +63,8 @@ _get_property (GObject * object, guint property_id,
GESTimelineElement *self = GES_TIMELINE_ELEMENT (object);
switch (property_id) {
case PROP_PARENT:
g_value_set_object (value, self->parent);
case PROP_START:
g_value_set_uint64 (value, self->start);
break;
@ -89,6 +92,9 @@ _set_property (GObject * object, guint property_id,
GESTimelineElement *self = GES_TIMELINE_ELEMENT (object);
switch (property_id) {
case PROP_PARENT:
ges_timeline_element_set_parent (self, g_value_get_object (value));
break;
case PROP_START:
ges_timeline_element_set_start (self, g_value_get_uint64 (value));
break;
@ -129,6 +135,16 @@ ges_timeline_element_class_init (GESTimelineElementClass * klass)
object_class->get_property = _get_property;
object_class->set_property = _set_property;
/**
* GESTimelineElement:parent:
*
* The parent container of the object
*/
properties[PROP_PARENT] =
g_param_spec_object ("parent", "Parent",
"The parent container of the object", GES_TYPE_TIMELINE_ELEMENT,
G_PARAM_READWRITE);
/**
* GESTimelineElement:start:
*
@ -200,6 +216,68 @@ ges_timeline_element_class_init (GESTimelineElementClass * klass)
* API implementation *
*********************************************/
/**
* ges_timeline_element_set_parent:
* @self: a #GESTimelineElement
* @parent: new parent of self
*
* Sets the parent of @self to @parent. The object's reference count will
* be incremented, and any floating reference will be removed (see g_object_ref_sink()).
*
* Returns: %TRUE if @parent could be set or %FALSE when @self
* already had a parent or @self and @parent are the same.
*/
gboolean
ges_timeline_element_set_parent (GESTimelineElement * self,
GESTimelineElement * parent)
{
g_return_val_if_fail (GES_IS_TIMELINE_ELEMENT (self), FALSE);
g_return_val_if_fail (GES_IS_TIMELINE_ELEMENT (parent), FALSE);
g_return_val_if_fail (self != parent, FALSE);
GST_DEBUG_OBJECT (self, "set parent (ref and sink)");
if (G_UNLIKELY (self->parent != NULL))
goto had_parent;
self->parent = parent;
g_object_ref_sink (self);
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_PARENT]);
return TRUE;
/* ERROR handling */
had_parent:
{
GST_DEBUG_OBJECT (self, "set parent failed, object already had a parent");
return FALSE;
}
}
/**
* ges_timeline_element_get_parent:
* @self: a #GESTimelineElement
*
* Returns the parent of @self. This function increases the refcount
* of the parent self so you should gst_object_unref() it after usage.
*
* Returns: (transfer full): parent of @self, this can be %NULL if @self
* has no parent. unref after usage.
*/
GESTimelineElement *
ges_timeline_element_get_parent (GESTimelineElement * self)
{
GESTimelineElement *result = NULL;
g_return_val_if_fail (GES_IS_TIMELINE_ELEMENT (self), NULL);
result = self->parent;
if (G_LIKELY (result))
gst_object_ref (result);
return result;
}
/**
* ges_timeline_element_set_start:
* @self: a #GESTimelineElement

12
ges/ges-timeline-element.h
View file

@ -76,6 +76,13 @@ typedef struct _GESTimelineElementPrivate GESTimelineElementPrivate;
*/
#define GES_TIMELINE_ELEMENT_PRIORITY(obj) (((GESTimelineElement*)obj)->priority)
/**
* GES_TIMELINE_ELEMENT_PARENT:
* @obj: a #GESTimelineElement
*
* The parent of the object.
*/
#define GES_TIMELINE_ELEMENT_PARENT(obj) (((GESTimelineElement*)obj)->parent)
/**
* GESTimelineElementClass:
@ -132,7 +139,8 @@ struct _GESTimelineElement
{
GInitiallyUnowned parent_instance;
/*< protected >*/
/*< read only >*/
GESTimelineElement *parent;
GESAsset *asset;
GstClockTime start;
GstClockTime inpoint;
@ -149,6 +157,8 @@ struct _GESTimelineElement
GType ges_timeline_element_get_type (void) G_GNUC_CONST;
GESTimelineElement * ges_timeline_element_get_parent (GESTimelineElement * self);
gboolean ges_timeline_element_set_parent (GESTimelineElement *self, GESTimelineElement *parent);
void ges_timeline_element_set_start (GESTimelineElement *self, GstClockTime start);
void ges_timeline_element_set_inpoint (GESTimelineElement *self, GstClockTime inpoint);
void ges_timeline_element_set_duration (GESTimelineElement *self, GstClockTime duration);