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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.
gboolean clutter_content_get_preferred_size (ClutterContent *content,gfloat *width,gfloat *height);
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.
content |
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width |
return location for the natural width of the content. |
[out] |
height |
return location for the natural height of the content. |
[out] |
Since: 1.10
void
clutter_content_invalidate (ClutterContent *content);
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
typedef struct _ClutterContent ClutterContent;
The ClutterContent structure is an opaque type whose members cannot be acccessed directly.
Since: 1.10
struct ClutterContentIface {
gboolean (* get_preferred_size) (ClutterContent *content,
gfloat *width,
gfloat *height);
void (* paint_content) (ClutterContent *content,
ClutterActor *actor,
ClutterPaintNode *node);
void (* attached) (ClutterContent *content,
ClutterActor *actor);
void (* detached) (ClutterContent *content,
ClutterActor *actor);
void (* invalidate) (ClutterContent *content);
};
The ClutterContentIface structure contains only private data.
virtual function; should be overridden by subclasses of ClutterContent that have a natural size |
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virtual function; called each time the content needs to paint itself |
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virtual function; called each time a ClutterContent is attached to a ClutterActor. |
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virtual function; called each time a ClutterContent is detached from a ClutterActor. |
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virtual function; called each time a ClutterContent state is changed. |
Since: 1.10
“attached” signalvoid user_function (ClutterContent *content, ClutterActor *actor, gpointer user_data)
This signal is emitted each time a ClutterContent implementation is assigned to a ClutterActor.
content |
the object that emitted the signal |
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actor |
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user_data |
user data set when the signal handler was connected. |
Flags: Run First
Since: 1.10
“detached” signalvoid user_function (ClutterContent *content, ClutterActor *actor, gpointer user_data)
This signal is emitted each time a ClutterContent implementation is removed from a ClutterActor.
content |
the object that emitted the signal |
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actor |
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user_data |
user data set when the signal handler was connected. |
Flags: Run First
Since: 1.10