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docs: Add an example of G_DEFINE_BOXED_TYPE

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Mention that the GType of the boxed type is stored inside the
g_define_type_id variable.

See bug: https://bugzilla.gnome.org/show_bug.cgi?id=723394
This commit is contained in:
Emmanuele Bassi 2015-04-20 14:11:12 +01:00
parent 7313195ae7
commit 5e7e058a9c
1 changed files with 11 additions and 1 deletions
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12
gobject/gtype.h
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@ -2021,7 +2021,17 @@ type_name##_get_type (void) \
* A convenience macro for boxed type implementations. * A convenience macro for boxed type implementations.
* Similar to G_DEFINE_BOXED_TYPE(), but allows to insert custom code into the * Similar to G_DEFINE_BOXED_TYPE(), but allows to insert custom code into the
* type_name_get_type() function, e.g. to register value transformations with * type_name_get_type() function, e.g. to register value transformations with
* g_value_register_transform_func(). * g_value_register_transform_func(), for instance:
*
* |[<!-- language="C" -->
* G_DEFINE_BOXED_TYPE_WITH_CODE (GdkRectangle, gdk_rectangle,
* gdk_rectangle_copy,
* gdk_rectangle_free,
* register_rectangle_transform_funcs (g_define_type_id))
* ]|
*
* Similarly to the %G_DEFINE_TYPE family of macros, the #GType of the newly
* defined boxed type is exposed in the `g_define_type_id` variable.
* *
* Since: 2.26 * Since: 2.26
*/ */