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Clutter Reference Manual | |
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| Top | Description | Object Hierarchy | Prerequisites | Known Implementations | Signals | ||||
ClutterContent; struct ClutterContentIface; gboolean clutter_content_get_preferred_size (ClutterContent *content,gfloat *width,gfloat *height); void clutter_content_invalidate (ClutterContent *content);
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.
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 | |
| virtual function; called each time the content needs to paint itself | |
| virtual function; called each time a ClutterContent is attached to a ClutterActor. | |
| virtual function; called each time a ClutterContent is detached from a ClutterActor. | |
| virtual function; called each time a ClutterContent state is changed. |
Since 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.
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a ClutterContent |
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return location for the natural width of the content. [out] |
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return location for the natural height of the content. [out] |
Returns : |
TRUE if the content has a preferred size, and FALSE
otherwise |
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.
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a ClutterContent |
Since 1.10
"attached" signalvoid user_function (ClutterContent *content,
ClutterActor *actor,
gpointer user_data) : Run First
This signal is emitted each time a ClutterContent implementation is assigned to a ClutterActor.
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the object that emitted the signal |
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a ClutterActor |
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user data set when the signal handler was connected. |
Since 1.10
"detached" signalvoid user_function (ClutterContent *content,
ClutterActor *actor,
gpointer user_data) : Run First
This signal is emitted each time a ClutterContent implementation is removed from a ClutterActor.
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the object that emitted the signal |
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a ClutterActor |
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user data set when the signal handler was connected. |
Since 1.10