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Add ClutterActor::create_pango_context()

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Sometimes an actor needs to set specific font rendering options on
the PangoContext without changing settings for every other text-rendering
actor.

In order to do this, we need a new public method to create a Pango
context object -- preset with all the default settings -- owned by the
developer and not shared with the rest of Clutter.

This new method is called clutter_actor_create_pango_context(); while
it does not strictly depend on a ClutterActor, it is a good idea to
have it inside the ClutterActor API to map the current get_pango_context()
method and in case we start storing screen-specific data to the Actor
itself during the 1.x API cycle.
This commit is contained in:
Emmanuele Bassi 2009-01-05 15:29:10 +00:00
parent d622a4dd89
commit 982a678053
2 changed files with 49 additions and 18 deletions
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36
clutter/clutter-actor.c
View File

@ -7606,8 +7606,9 @@ clutter_actor_grab_key_focus (ClutterActor *self)
* is already configured using the appropriate font map, resolution * is already configured using the appropriate font map, resolution
* and font options. * and font options.
* *
* The returned #PangoContext will be updated each time the options * Unlike clutter_actor_create_pango_context(), this context is owend
* stored by the default #ClutterBackend change. * by the #ClutterActor and it will be updated each time the options
* stored by the #ClutterBackend change.
* *
* You can use the returned #PangoContext to create a #PangoLayout * You can use the returned #PangoContext to create a #PangoLayout
* and render text using cogl_pango_render_layout() to reuse the * and render text using cogl_pango_render_layout() to reuse the
@ -7633,8 +7634,37 @@ clutter_actor_get_pango_context (ClutterActor *self)
return priv->pango_context; return priv->pango_context;
ctx = CLUTTER_CONTEXT (); ctx = CLUTTER_CONTEXT ();
priv->pango_context = _clutter_context_create_pango_context (ctx); priv->pango_context = _clutter_context_get_pango_context (ctx);
g_object_ref (priv->pango_context); g_object_ref (priv->pango_context);
return priv->pango_context; return priv->pango_context;
} }
/**
* clutter_actor_create_pango_context:
* @self: a #ClutterActor
*
* Creates a #PangoContext for the given actor. The #PangoContext
* is already configured using the appropriate font map, resolution
* and font options.
*
* See also clutter_actor_get_pango_context().
*
* Return value: the newly created #PangoContext. Use g_object_ref()
* on the returned value to deallocate its resources
*
* Since: 1.0
*/
PangoContext *
clutter_actor_create_pango_context (ClutterActor *self)
{
ClutterMainContext *ctx;
PangoContext *retval;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), NULL);
ctx = CLUTTER_CONTEXT ();
retval = _clutter_context_create_pango_context (ctx);
return retval;
}

31
clutter/clutter-actor.h
View File

@ -422,6 +422,8 @@ void clutter_actor_set_opacity (ClutterActor
guint8 opacity); guint8 opacity);
guint8 clutter_actor_get_opacity (ClutterActor *self); guint8 clutter_actor_get_opacity (ClutterActor *self);
guint8 clutter_actor_get_paint_opacity (ClutterActor *self); guint8 clutter_actor_get_paint_opacity (ClutterActor *self);
gboolean clutter_actor_get_paint_visibility (ClutterActor *self);
void clutter_actor_set_name (ClutterActor *self, void clutter_actor_set_name (ClutterActor *self,
const gchar *name); const gchar *name);
@ -547,25 +549,24 @@ gboolean clutter_actor_is_rotated (ClutterActor *self);
gboolean clutter_actor_is_scaled (ClutterActor *self); gboolean clutter_actor_is_scaled (ClutterActor *self);
gboolean clutter_actor_should_pick_paint (ClutterActor *self); gboolean clutter_actor_should_pick_paint (ClutterActor *self);
void clutter_actor_box_get_from_vertices (ClutterVertex vtx[4], void clutter_actor_box_get_from_vertices (ClutterVertex vtx[4],
ClutterActorBox *box); ClutterActorBox *box);
void clutter_actor_get_abs_allocation_vertices (ClutterActor *self, void clutter_actor_get_abs_allocation_vertices (ClutterActor *self,
ClutterVertex verts[4]); ClutterVertex verts[4]);
void clutter_actor_apply_transform_to_point (ClutterActor *self, void clutter_actor_apply_transform_to_point (ClutterActor *self,
const ClutterVertex *point, const ClutterVertex *point,
ClutterVertex *vertex); ClutterVertex *vertex);
void clutter_actor_apply_relative_transform_to_point (ClutterActor *self, void clutter_actor_apply_relative_transform_to_point (ClutterActor *self,
ClutterActor *ancestor, ClutterActor *ancestor,
const ClutterVertex *point, const ClutterVertex *point,
ClutterVertex *vertex); ClutterVertex *vertex);
gboolean clutter_actor_get_paint_visibility (ClutterActor *self); void clutter_actor_grab_key_focus (ClutterActor *self);
void clutter_actor_grab_key_focus (ClutterActor *self); PangoContext *clutter_actor_get_pango_context (ClutterActor *self);
PangoContext *clutter_actor_create_pango_context (ClutterActor *self);
PangoContext *clutter_actor_get_pango_context (ClutterActor *self);
G_END_DECLS G_END_DECLS