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Migrating docs.

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* docs/reference/gobject/tmpl/gparamspec.sgml:
	* gobject/gparam.c:
	* gobject/gparam.h:
	  Migrating docs.


svn path=/trunk/; revision=7073
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Stefan Kost 2008-06-21 13:47:14 +00:00
parent d5f1c71fde
commit fb07c65020
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@ -1,3 +1,10 @@
2008-06-21 Stefan Kost <ensonic@users.sf.net>
* docs/reference/gobject/tmpl/gparamspec.sgml:
* gobject/gparam.c:
* gobject/gparam.h:
Migrating docs.
2008-06-21 Stefan Kost <ensonic@users.sf.net> 2008-06-21 Stefan Kost <ensonic@users.sf.net>
* gobject/gboxed.c: * gobject/gboxed.c:

546
docs/reference/gobject/tmpl/gparamspec.sgml
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@ -1,546 +0,0 @@
<!-- ##### SECTION Title ##### -->
GParamSpec
<!-- ##### SECTION Short_Description ##### -->
Metadata for parameter specifications
<!-- ##### SECTION Long_Description ##### -->
<para>
#GParamSpec is an object structure that encapsulates the metadata
required to specify parameters, such as e.g. #GObject properties.
</para>
<para id="canonical-parameter-name">
Parameter names need to start with a letter (a-z or A-Z). Subsequent
characters can be letters, numbers or a '-'.
All other characters are replaced by a '-' during construction.
The result of this replacement is called the canonical name of the
parameter.
</para>
<!-- ##### SECTION See_Also ##### -->
<para>
g_object_class_install_property(), g_object_set(), g_object_get(),
g_object_set_property(), g_object_get_property(), g_value_register_transform_func()
</para>
<!-- ##### SECTION Stability_Level ##### -->
<!-- ##### MACRO G_TYPE_IS_PARAM ##### -->
<para>
Returns whether @type "is a" %G_TYPE_PARAM.
</para>
@type: a #GType ID
<!-- ##### MACRO G_PARAM_SPEC ##### -->
<para>
Casts a derived #GParamSpec object (e.g. of type #GParamSpecInt) into
a #GParamSpec object.
</para>
@pspec: a valid #GParamSpec
<!-- ##### MACRO G_IS_PARAM_SPEC ##### -->
<para>
Checks whether @pspec "is a" valid #GParamSpec structure of type %G_TYPE_PARAM
or derived.
</para>
@pspec: a #GParamSpec
<!-- ##### MACRO G_PARAM_SPEC_CLASS ##### -->
<para>
Casts a derived #GParamSpecClass structure into a #GParamSpecClass structure.
</para>
@pclass: a valid #GParamSpecClass
<!-- ##### MACRO G_IS_PARAM_SPEC_CLASS ##### -->
<para>
Checks whether @pclass "is a" valid #GParamSpecClass structure of type
%G_TYPE_PARAM or derived.
</para>
@pclass: a #GParamSpecClass
<!-- ##### MACRO G_PARAM_SPEC_GET_CLASS ##### -->
<para>
Retrieves the #GParamSpecClass of a #GParamSpec.
</para>
@pspec: a valid #GParamSpec
<!-- ##### MACRO G_PARAM_SPEC_TYPE ##### -->
<para>
Retrieves the #GType of this @pspec.
</para>
@pspec: a valid #GParamSpec
<!-- ##### MACRO G_PARAM_SPEC_TYPE_NAME ##### -->
<para>
Retrieves the #GType name of this @pspec.
</para>
@pspec: a valid #GParamSpec
<!-- ##### MACRO G_PARAM_SPEC_VALUE_TYPE ##### -->
<para>
Retrieves the #GType to initialize a #GValue for this parameter.
</para>
@pspec: a valid #GParamSpec
<!-- ##### STRUCT GParamSpec ##### -->
<para>
All fields of the <structname>GParamSpec</structname> struct are private and
should not be used directly, except for the following:
</para>
@g_type_instance: private #GTypeInstance portion
@name: name of this parameter
@flags: #GParamFlags flags for this parameter
@value_type: the #GValue type for this parameter
@owner_type: #GType type that uses (introduces) this paremeter
<!-- ##### STRUCT GParamSpecClass ##### -->
<para>
The class structure for the <structname>GParamSpec</structname> type.
Normally, <structname>GParamSpec</structname> classes are filled by
g_param_type_register_static().
</para>
@g_type_class: the parent class
@value_type: the #GValue type for this parameter
@finalize: The instance finalization function (optional), should chain
up to the finalize method of the parent class.
@value_set_default: Resets a @value to the default value for this type
(recommended, the default is g_value_reset()), see
g_param_value_set_default().
@value_validate: Ensures that the contents of @value comply with the
specifications set out by this type (optional), see
g_param_value_set_validate().
@values_cmp: Compares @value1 with @value2 according to this type
(recommended, the default is memcmp()), see g_param_values_cmp().
<!-- ##### ENUM GParamFlags ##### -->
<para>
Through the #GParamFlags flag values, certain aspects of parameters
can be configured.
</para>
@G_PARAM_READABLE: the parameter is readable
@G_PARAM_WRITABLE: the parameter is writable
@G_PARAM_CONSTRUCT: the parameter will be set upon object construction
@G_PARAM_CONSTRUCT_ONLY: the parameter will only be set upon object construction
@G_PARAM_LAX_VALIDATION: upon parameter conversion (see g_param_value_convert())
strict validation is not required
@G_PARAM_STATIC_NAME: the string used as name when constructing the
parameter is guaranteed to remain valid and
unmodified for the lifetime of the parameter.
Since 2.8
@G_PARAM_PRIVATE:
@G_PARAM_STATIC_NICK: the string used as nick when constructing the
parameter is guaranteed to remain valid and
unmmodified for the lifetime of the parameter.
Since 2.8
@G_PARAM_STATIC_BLURB: the string used as blurb when constructing the
parameter is guaranteed to remain valid and
unmodified for the lifetime of the parameter.
Since 2.8
<!-- ##### MACRO G_PARAM_READWRITE ##### -->
<para>
#GParamFlags value alias for %G_PARAM_READABLE | %G_PARAM_WRITABLE.
</para>
<!-- ##### MACRO G_PARAM_STATIC_STRINGS ##### -->
<para>
#GParamFlags value alias for %G_PARAM_STATIC_NAME | %G_PARAM_STATIC_NICK | %G_PARAM_STATIC_BLURB.
Since 2.13.0
</para>
<!-- ##### MACRO G_PARAM_MASK ##### -->
<para>
Mask containing the bits of #GParamSpec.flags which are reserved for GLib.
</para>
<!-- ##### MACRO G_PARAM_USER_SHIFT ##### -->
<para>
Minimum shift count to be used for user defined flags, to be stored in
#GParamSpec.flags.
</para>
<!-- ##### FUNCTION g_param_spec_ref ##### -->
<para>
Increments the reference count of @pspec.
</para>
@pspec: a valid #GParamSpec
@Returns: the #GParamSpec that was passed into this function
<!-- ##### FUNCTION g_param_spec_unref ##### -->
<para>
Decrements the reference count of a @pspec.
</para>
@pspec: a valid #GParamSpec
<!-- ##### FUNCTION g_param_spec_sink ##### -->
<para>
The initial reference count of a newly created #GParamSpec is 1, even
though no one has explicitly called g_param_spec_ref() on it yet. So the
initial reference count is flagged as "floating", until someone calls
<literal>g_param_spec_ref (pspec); g_param_spec_sink (pspec);</literal>
in sequence on it, taking over the initial reference count (thus
ending up with a @pspec that has a reference count of 1 still, but is
not flagged "floating" anymore).
</para>
@pspec: a valid #GParamSpec
<!-- ##### FUNCTION g_param_spec_ref_sink ##### -->
<para>
Convenience function to ref and sink a #GParamSpec.
</para>
@pspec: a valid #GParamSpec
@Returns: the #GParamSpec that was passed into this function
@Since: 2.10
<!-- ##### FUNCTION g_param_value_set_default ##### -->
<para>
Sets @value to its default value as specified in @pspec.
</para>
@pspec: a valid #GParamSpec
@value: a #GValue of correct type for @pspec
<!-- ##### FUNCTION g_param_value_defaults ##### -->
<para>
Checks whether @value contains the default value as specified in @pspec.
</para>
@pspec: a valid #GParamSpec
@value: a #GValue of correct type for @pspec
@Returns: whether @value contains the canonical default for this @pspec
<!-- ##### FUNCTION g_param_value_validate ##### -->
<para>
Ensures that the contents of @value comply with the specifications
set out by @pspec. For example, a #GParamSpecInt might require
that integers stored in @value may not be smaller than -42 and not be
greater than +42. If @value contains an integer outside of this range,
it is modified accordingly, so the resulting value will fit into the
range -42 .. +42.
</para>
@pspec: a valid #GParamSpec
@value: a #GValue of correct type for @pspec
@Returns: whether modifying @value was necessary to ensure validity
<!-- ##### FUNCTION g_param_value_convert ##### -->
<para>
Transforms @src_value into @dest_value if possible, and then validates
@dest_value, in order for it to conform to @pspec.
If @strict_validation is %TRUE this function will only succeed if
the transformed @dest_value complied to @pspec without modifications.
See also g_value_type_transformable(), g_value_transform() and
g_param_value_validate().
</para>
@pspec: a valid #GParamSpec
@src_value: souce #GValue
@dest_value: destination #GValue of correct type for @pspec
@strict_validation: %TRUE requires @dest_value to conform to @pspec without modifications
@Returns: %TRUE if transformation and validation were successful,
%FALSE otherwise and @dest_value is left untouched.
<!-- ##### FUNCTION g_param_values_cmp ##### -->
<para>
Compares @value1 with @value2 according to @pspec, and return -1, 0 or +1,
if @value1 is found to be less than, equal to or greater than @value2,
respectively.
</para>
@pspec: a valid #GParamSpec
@value1: a #GValue of correct type for @pspec
@value2: a #GValue of correct type for @pspec
@Returns: -1, 0 or +1, for a less than, equal to or greater than result
<!-- ##### FUNCTION g_param_spec_get_name ##### -->
<para>
Returns the name of a #GParamSpec.
</para>
@pspec: a valid #GParamSpec
@Returns: the name of @pspec.
<!-- ##### FUNCTION g_param_spec_get_nick ##### -->
<para>
Returns the nickname of a #GParamSpec.
</para>
@pspec: a valid #GParamSpec
@Returns: the nickname of @pspec.
<!-- ##### FUNCTION g_param_spec_get_blurb ##### -->
<para>
Returns the short description of a #GParamSpec.
</para>
@pspec: a valid #GParamSpec
@Returns: the short description of @pspec.
<!-- ##### FUNCTION g_param_spec_get_qdata ##### -->
<para>
Gets back user data pointers stored via g_param_spec_set_qdata().
</para>
@pspec: a valid #GParamSpec
@quark: a #GQuark, naming the user data pointer
@Returns: the user data pointer set, or %NULL
<!-- ##### FUNCTION g_param_spec_set_qdata ##### -->
<para>
Sets an opaque, named pointer on a #GParamSpec. The name is specified
through a #GQuark (retrieved e.g. via g_quark_from_static_string()), and
the pointer can be gotten back from the @pspec with g_param_spec_get_qdata().
Setting a previously set user data pointer, overrides (frees)
the old pointer set, using %NULL as pointer essentially
removes the data stored.
</para>
@pspec: the #GParamSpec to set store a user data pointer
@quark: a #GQuark, naming the user data pointer
@data: an opaque user data pointer
<!-- ##### FUNCTION g_param_spec_set_qdata_full ##### -->
<para>
This function works like g_param_spec_set_qdata(), but in addition,
a <literal>void (*destroy) (gpointer)</literal> function may be
specified which is called with @data as argument when the @pspec is
finalized, or the data is being overwritten by a call to
g_param_spec_set_qdata() with the same @quark.
</para>
@pspec: the #GParamSpec to set store a user data pointer
@quark: a #GQuark, naming the user data pointer
@data: an opaque user data pointer
@destroy: function to invoke with @data as argument, when @data needs to
be freed
<!-- ##### FUNCTION g_param_spec_steal_qdata ##### -->
<para>
Gets back user data pointers stored via g_param_spec_set_qdata() and
removes the @data from @pspec without invoking it's destroy() function
(if any was set).
Usually, calling this function is only required to update
user data pointers with a destroy notifier.
</para>
@pspec: the #GParamSpec to get a stored user data pointer from
@quark: a #GQuark, naming the user data pointer
@Returns: the user data pointer set, or %NULL
<!-- ##### FUNCTION g_param_spec_get_redirect_target ##### -->
<para>
If the paramspec redirects operations to another paramspec,
returns that paramspec. Redirect is used typically for
providing a new implementation of a property in a derived
type while preserving all the properties from the parent
type. Redirection is established by creating a property
of type #GParamSpecOverride. See g_object_class_override_property()
for an example of the use of this capability.
</para>
@pspec: a #GParamSpec
@Returns: paramspec to which requests on this paramspec should
be redirected, or %NULL if none.
@Since: 2.4
<!-- ##### FUNCTION g_param_spec_internal ##### -->
<para>
Creates a new #GParamSpec instance.
</para>
<para>
A property name consists of segments consisting of ASCII letters and
digits, separated by either the '-' or '_' character. The first
character of a property name must be a letter. Names which violate these
rules lead to undefined behaviour.
</para>
<para>
When creating and looking up a #GParamSpec, either separator can be used,
but they cannot be mixed. Using '-' is considerably more efficient and in
fact required when using property names as detail strings for signals.
</para>
<para>
Beyond the name, #GParamSpec<!-- -->s have two more descriptive strings
associated with them, the @nick, which should be suitable for use as
a label for the property in a property editor, and the @blurb, which should
be a somewhat longer description, suitable for e.g. a tooltip. The @nick
and @blurb should ideally be localized.
</para>
@param_type: the #GType for the property; must be derived from #G_TYPE_PARAM
@name: the canonical name of the property
@nick: the nickname of the property
@blurb: a short description of the property
@flags: a combination of #GParamFlags
@Returns: a newly allocated #GParamSpec instance
<!-- ##### STRUCT GParamSpecTypeInfo ##### -->
<para>
This structure is used to provide the type system with the information
required to initialize and destruct (finalize) a parameter's class and
instances thereof.
The initialized structure is passed to the g_param_type_register_static()
The type system will perform a deep copy of this structure, so it's memory
does not need to be persistent across invocation of
g_param_type_register_static().
</para>
@instance_size: Size of the instance (object) structure.
@n_preallocs: Prior to GLib 2.10, it specified the number of pre-allocated (cached) instances to reserve memory for (0 indicates no caching). Since GLib 2.10, it is ignored, since instances are allocated with the <link linkend="glib-Memory-Slices">slice allocator</link> now.
@instance_init: Location of the instance initialization function (optional).
@value_type: The #GType of values conforming to this #GParamSpec
@finalize: The instance finalization function (optional).
@value_set_default: Resets a @value to the default value for @pspec
(recommended, the default is g_value_reset()), see
g_param_value_set_default().
@value_validate: Ensures that the contents of @value comply with the
specifications set out by @pspec (optional), see
g_param_value_set_validate().
@values_cmp: Compares @value1 with @value2 according to @pspec
(recommended, the default is memcmp()), see g_param_values_cmp().
<!-- ##### FUNCTION g_param_type_register_static ##### -->
<para>
Registers @name as the name of a new static type derived from
#G_TYPE_PARAM. The type system uses the information contained in the
#GParamSpecTypeInfo structure pointed to by @info to manage the #GParamSpec
type and its instances.
</para>
@name: 0-terminated string used as the name of the new #GParamSpec type.
@pspec_info: The #GParamSpecTypeInfo for this #GParamSpec type.
@Returns: The new type identifier.
<!-- ##### STRUCT GParamSpecPool ##### -->
<para>
A #GParamSpecPool maintains a collection of #GParamSpec<!-- -->s which can be
quickly accessed by owner and name. The implementation of the #GObject property
system uses such a pool to store the #GParamSpecs of the properties all object
types.
</para>
<!-- ##### FUNCTION g_param_spec_pool_new ##### -->
<para>
Creates a new #GParamSpecPool.
</para>
<para>
If @type_prefixing is %TRUE, lookups in the newly created pool will
allow to specify the owner as a colon-separated prefix of the property name,
like "GtkContainer:border-width". This feature is deprecated, so you should
always set @type_prefixing to %FALSE.
</para>
@type_prefixing: Whether the pool will support type-prefixed property names.
@Returns: a newly allocated #GParamSpecPool.
<!-- ##### FUNCTION g_param_spec_pool_insert ##### -->
<para>
Inserts a #GParamSpec in the pool.
</para>
@pool: a #GParamSpecPool.
@pspec: the #GParamSpec to insert
@owner_type: a #GType identifying the owner of @pspec
<!-- ##### FUNCTION g_param_spec_pool_remove ##### -->
<para>
Removes a #GParamSpec from the pool.
</para>
@pool: a #GParamSpecPool
@pspec: the #GParamSpec to remove
<!-- ##### FUNCTION g_param_spec_pool_lookup ##### -->
<para>
Looks up a #GParamSpec in the pool.
</para>
@pool: a #GParamSpecPool
@param_name: the name to look for
@owner_type: the owner to look for
@walk_ancestors: If %TRUE, also try to find a #GParamSpec with @param_name
owned by an ancestor of @owner_type.
@Returns: The found #GParamSpec, or %NULL if no matching #GParamSpec was found.
<!-- ##### FUNCTION g_param_spec_pool_list ##### -->
<para>
Gets an array of all #GParamSpec<!-- -->s owned by @owner_type in the pool.
</para>
@pool: a #GParamSpecPool
@owner_type: the owner to look for
@n_pspecs_p: return location for the length of the returned array
@Returns: a newly allocated array containing pointers to all
#GParamSpec<!-- -->s owned by @owner_type in the pool
<!-- ##### FUNCTION g_param_spec_pool_list_owned ##### -->
<para>
Gets an #GList of all #GParamSpec<!-- -->s owned by @owner_type in the pool.
</para>
@pool: a #GParamSpecPool
@owner_type: the owner to look for
@Returns: a #GList of all #GParamSpec<!-- -->s owned by @owner_type in
the pool#GParamSpec<!-- -->s.

312
gobject/gparam.c
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@ -16,7 +16,22 @@
* Free Software Foundation, Inc., 59 Temple Place, Suite 330, * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA. * Boston, MA 02111-1307, USA.
*/ */
/**
* SECTION:gparamspec
* @Short_description: Metadata for parameter specifications
* @See_also:g_object_class_install_property(), g_object_set(), g_object_get(),
* g_object_set_property(), g_object_get_property(), g_value_register_transform_func()
*
* #GParamSpec is an object structure that encapsulates the metadata
* required to specify parameters, such as e.g. #GObject properties.
*
* <para id="canonical-parameter-name">
* Parameter names need to start with a letter (a-z or A-Z). Subsequent
* characters can be letters, numbers or a '-'.
* All other characters are replaced by a '-' during construction.
* The result of this replacement is called the canonical name of the
* parameter.
*/
/* /*
* MT safe * MT safe
*/ */
@ -160,6 +175,14 @@ g_param_spec_finalize (GParamSpec *pspec)
g_type_free_instance ((GTypeInstance*) pspec); g_type_free_instance ((GTypeInstance*) pspec);
} }
/**
* g_param_spec_ref:
* @pspec: a valid #GParamSpec
*
* Increments the reference count of @pspec.
*
* Returns: the #GParamSpec that was passed into this function
*/
GParamSpec* GParamSpec*
g_param_spec_ref (GParamSpec *pspec) g_param_spec_ref (GParamSpec *pspec)
{ {
@ -171,6 +194,12 @@ g_param_spec_ref (GParamSpec *pspec)
return pspec; return pspec;
} }
/**
* g_param_spec_unref:
* @pspec: a valid #GParamSpec
*
* Decrements the reference count of a @pspec.
*/
void void
g_param_spec_unref (GParamSpec *pspec) g_param_spec_unref (GParamSpec *pspec)
{ {
@ -187,6 +216,18 @@ g_param_spec_unref (GParamSpec *pspec)
} }
} }
/**
* g_param_spec_sink:
* @pspec: a valid #GParamSpec
*
* The initial reference count of a newly created #GParamSpec is 1, even
* though no one has explicitly called g_param_spec_ref() on it yet. So the
* initial reference count is flagged as "floating", until someone calls
* <literal>g_param_spec_ref (pspec); g_param_spec_sink (pspec);</literal>
* in sequence on it, taking over the initial reference count (thus
* ending up with a @pspec that has a reference count of 1 still, but is
* not flagged "floating" anymore).
*/
void void
g_param_spec_sink (GParamSpec *pspec) g_param_spec_sink (GParamSpec *pspec)
{ {
@ -202,6 +243,15 @@ g_param_spec_sink (GParamSpec *pspec)
g_param_spec_unref (pspec); g_param_spec_unref (pspec);
} }
/**
* g_param_spec_ref_sink:
* @pspec: a valid #GParamSpec
*
* Convenience function to ref and sink a #GParamSpec.
*
* Since: 2.10
* Returns: the #GParamSpec that was passed into this function
*/
GParamSpec* GParamSpec*
g_param_spec_ref_sink (GParamSpec *pspec) g_param_spec_ref_sink (GParamSpec *pspec)
{ {
@ -213,6 +263,14 @@ g_param_spec_ref_sink (GParamSpec *pspec)
return pspec; return pspec;
} }
/**
* g_param_spec_get_name:
* @pspec: a valid #GParamSpec
*
* Get the name of a #GParamSpec.
*
* Returns: the name of @pspec.
*/
G_CONST_RETURN gchar* G_CONST_RETURN gchar*
g_param_spec_get_name (GParamSpec *pspec) g_param_spec_get_name (GParamSpec *pspec)
{ {
@ -221,6 +279,14 @@ g_param_spec_get_name (GParamSpec *pspec)
return pspec->name; return pspec->name;
} }
/**
* g_param_spec_get_nick:
* @pspec: a valid #GParamSpec
*
* Get the nickname of a #GParamSpec.
*
* Returns: the nickname of @pspec.
*/
G_CONST_RETURN gchar* G_CONST_RETURN gchar*
g_param_spec_get_nick (GParamSpec *pspec) g_param_spec_get_nick (GParamSpec *pspec)
{ {
@ -240,6 +306,14 @@ g_param_spec_get_nick (GParamSpec *pspec)
return pspec->name; return pspec->name;
} }
/**
* g_param_spec_get_blurb:
* @pspec: a valid #GParamSpec
*
* Get the short description of a #GParamSpec.
*
* Returns: the short description of @pspec.
*/
G_CONST_RETURN gchar* G_CONST_RETURN gchar*
g_param_spec_get_blurb (GParamSpec *pspec) g_param_spec_get_blurb (GParamSpec *pspec)
{ {
@ -295,6 +369,33 @@ is_canonical (const gchar *key)
return TRUE; return TRUE;
} }
/**
* g_param_spec_internal:
* @param_type: the #GType for the property; must be derived from #G_TYPE_PARAM
* @name: the canonical name of the property
* @nick: the nickname of the property
* @blurb: a short description of the property
* @flags: a combination of #GParamFlags
*
* Creates a new #GParamSpec instance.
*
* A property name consists of segments consisting of ASCII letters and
* digits, separated by either the '-' or '_' character. The first
* character of a property name must be a letter. Names which violate these
* rules lead to undefined behaviour.
*
* When creating and looking up a #GParamSpec, either separator can be used,
* but they cannot be mixed. Using '-' is considerably more efficient and in
* fact required when using property names as detail strings for signals.
*
* Beyond the name, #GParamSpec<!-- -->s have two more descriptive strings
* associated with them, the @nick, which should be suitable for use as
* a label for the property in a property editor, and the @blurb, which should
* be a somewhat longer description, suitable for e.g. a tooltip. The @nick
* and @blurb should ideally be localized.
*
* Returns: a newly allocated #GParamSpec instance
*/
gpointer gpointer
g_param_spec_internal (GType param_type, g_param_spec_internal (GType param_type,
const gchar *name, const gchar *name,
@ -339,6 +440,15 @@ g_param_spec_internal (GType param_type,
return pspec; return pspec;
} }
/**
* g_param_spec_get_qdata:
* @pspec: a valid #GParamSpec
* @quark: a #GQuark, naming the user data pointer
*
* Gets back user data pointers stored via g_param_spec_set_qdata().
*
* Returns: the user data pointer set, or %NULL
*/
gpointer gpointer
g_param_spec_get_qdata (GParamSpec *pspec, g_param_spec_get_qdata (GParamSpec *pspec,
GQuark quark) GQuark quark)
@ -348,6 +458,19 @@ g_param_spec_get_qdata (GParamSpec *pspec,
return quark ? g_datalist_id_get_data (&pspec->qdata, quark) : NULL; return quark ? g_datalist_id_get_data (&pspec->qdata, quark) : NULL;
} }
/**
* g_param_spec_set_qdata:
* @pspec: the #GParamSpec to set store a user data pointer
* @quark: a #GQuark, naming the user data pointer
* @data: an opaque user data pointer
*
* Sets an opaque, named pointer on a #GParamSpec. The name is specified
* through a #GQuark (retrieved e.g. via g_quark_from_static_string()), and
* the pointer can be gotten back from the @pspec with g_param_spec_get_qdata().
* Setting a previously set user data pointer, overrides (frees)
* the old pointer set, using %NULL as pointer essentially
* removes the data stored.
*/
void void
g_param_spec_set_qdata (GParamSpec *pspec, g_param_spec_set_qdata (GParamSpec *pspec,
GQuark quark, GQuark quark,
@ -359,6 +482,20 @@ g_param_spec_set_qdata (GParamSpec *pspec,
g_datalist_id_set_data (&pspec->qdata, quark, data); g_datalist_id_set_data (&pspec->qdata, quark, data);
} }
/**
* g_param_spec_set_qdata_full:
* @pspec: the #GParamSpec to set store a user data pointer
* @quark: a #GQuark, naming the user data pointer
* @data: an opaque user data pointer
* @destroy: function to invoke with @data as argument, when @data needs to
* be freed
*
* This function works like g_param_spec_set_qdata(), but in addition,
* a <literal>void (*destroy) (gpointer)</literal> function may be
* specified which is called with @data as argument when the @pspec is
* finalized, or the data is being overwritten by a call to
* g_param_spec_set_qdata() with the same @quark.
*/
void void
g_param_spec_set_qdata_full (GParamSpec *pspec, g_param_spec_set_qdata_full (GParamSpec *pspec,
GQuark quark, GQuark quark,
@ -371,6 +508,19 @@ g_param_spec_set_qdata_full (GParamSpec *pspec,
g_datalist_id_set_data_full (&pspec->qdata, quark, data, data ? destroy : (GDestroyNotify) NULL); g_datalist_id_set_data_full (&pspec->qdata, quark, data, data ? destroy : (GDestroyNotify) NULL);
} }
/**
* g_param_spec_steal_qdata:
* @pspec: the #GParamSpec to get a stored user data pointer from
* @quark: a #GQuark, naming the user data pointer
*
* Gets back user data pointers stored via g_param_spec_set_qdata() and
* removes the @data from @pspec without invoking it's destroy() function
* (if any was set).
* Usually, calling this function is only required to update
* user data pointers with a destroy notifier.
*
* Returns: the user data pointer set, or %NULL
*/
gpointer gpointer
g_param_spec_steal_qdata (GParamSpec *pspec, g_param_spec_steal_qdata (GParamSpec *pspec,
GQuark quark) GQuark quark)
@ -381,6 +531,22 @@ g_param_spec_steal_qdata (GParamSpec *pspec,
return g_datalist_id_remove_no_notify (&pspec->qdata, quark); return g_datalist_id_remove_no_notify (&pspec->qdata, quark);
} }
/**
* g_param_spec_get_redirect_target:
* @pspec: a #GParamSpec
*
* If the paramspec redirects operations to another paramspec,
* returns that paramspec. Redirect is used typically for
* providing a new implementation of a property in a derived
* type while preserving all the properties from the parent
* type. Redirection is established by creating a property
* of type #GParamSpecOverride. See g_object_class_override_property()
* for an example of the use of this capability.
*
* Since: 2.4
* Returns: paramspec to which requests on this paramspec should
* be redirected, or %NULL if none.
*/
GParamSpec* GParamSpec*
g_param_spec_get_redirect_target (GParamSpec *pspec) g_param_spec_get_redirect_target (GParamSpec *pspec)
{ {
@ -396,6 +562,13 @@ g_param_spec_get_redirect_target (GParamSpec *pspec)
return NULL; return NULL;
} }
/**
* g_param_value_set_default:
* @pspec: a valid #GParamSpec
* @value: a #GValue of correct type for @pspec
*
* Sets @value to its default value as specified in @pspec.
*/
void void
g_param_value_set_default (GParamSpec *pspec, g_param_value_set_default (GParamSpec *pspec,
GValue *value) GValue *value)
@ -408,6 +581,15 @@ g_param_value_set_default (GParamSpec *pspec,
G_PARAM_SPEC_GET_CLASS (pspec)->value_set_default (pspec, value); G_PARAM_SPEC_GET_CLASS (pspec)->value_set_default (pspec, value);
} }
/**
* g_param_value_defaults:
* @pspec: a valid #GParamSpec
* @value: a #GValue of correct type for @pspec
*
* Checks whether @value contains the default value as specified in @pspec.
*
* Returns: whether @value contains the canonical default for this @pspec
*/
gboolean gboolean
g_param_value_defaults (GParamSpec *pspec, g_param_value_defaults (GParamSpec *pspec,
GValue *value) GValue *value)
@ -427,6 +609,20 @@ g_param_value_defaults (GParamSpec *pspec,
return defaults; return defaults;
} }
/**
* g_param_value_validate:
* @pspec: a valid #GParamSpec
* @value: a #GValue of correct type for @pspec
*
* Ensures that the contents of @value comply with the specifications
* set out by @pspec. For example, a #GParamSpecInt might require
* that integers stored in @value may not be smaller than -42 and not be
* greater than +42. If @value contains an integer outside of this range,
* it is modified accordingly, so the resulting value will fit into the
* range -42 .. +42.
*
* Returns: whether modifying @value was necessary to ensure validity
*/
gboolean gboolean
g_param_value_validate (GParamSpec *pspec, g_param_value_validate (GParamSpec *pspec,
GValue *value) GValue *value)
@ -447,6 +643,24 @@ g_param_value_validate (GParamSpec *pspec,
return FALSE; return FALSE;
} }
/**
* g_param_value_convert:
* @pspec: a valid #GParamSpec
* @src_value: souce #GValue
* @dest_value: destination #GValue of correct type for @pspec
* @strict_validation: %TRUE requires @dest_value to conform to @pspec without modifications
*
* Transforms @src_value into @dest_value if possible, and then validates
* @dest_value, in order for it to conform to @pspec.
* If @strict_validation is %TRUE this function will only succeed if
* the transformed @dest_value complied to @pspec without modifications.
*
* See also g_value_type_transformable(), g_value_transform() and
* g_param_value_validate().
*
* Returns: %TRUE if transformation and validation were successful,
* %FALSE otherwise and @dest_value is left untouched.
*/
gboolean gboolean
g_param_value_convert (GParamSpec *pspec, g_param_value_convert (GParamSpec *pspec,
const GValue *src_value, const GValue *src_value,
@ -481,6 +695,18 @@ g_param_value_convert (GParamSpec *pspec,
} }
} }
/**
* g_param_values_cmp:
* @pspec: a valid #GParamSpec
* @value1: a #GValue of correct type for @pspec
* @value2: a #GValue of correct type for @pspec
*
* Compares @value1 with @value2 according to @pspec, and return -1, 0 or +1,
* if @value1 is found to be less than, equal to or greater than @value2,
* respectively.
*
* Returns: -1, 0 or +1, for a less than, equal to or greater than result
*/
gint gint
g_param_values_cmp (GParamSpec *pspec, g_param_values_cmp (GParamSpec *pspec,
const GValue *value1, const GValue *value1,
@ -598,6 +824,14 @@ value_param_lcopy_value (const GValue *value,
/* --- param spec pool --- */ /* --- param spec pool --- */
/**
* GParamSpecPool:
*
* A #GParamSpecPool maintains a collection of #GParamSpec<!-- -->s which can be
* quickly accessed by owner and name. The implementation of the #GObject property
* system uses such a pool to store the #GParamSpecs of the properties all object
* types.
*/
struct _GParamSpecPool struct _GParamSpecPool
{ {
GStaticMutex smutex; GStaticMutex smutex;
@ -629,6 +863,19 @@ param_spec_pool_equals (gconstpointer key_spec_1,
strcmp (key1->name, key2->name) == 0); strcmp (key1->name, key2->name) == 0);
} }
/**
* g_param_spec_pool_new:
* @type_prefixing: Whether the pool will support type-prefixed property names.
*
* Creates a new #GParamSpecPool.
*
* If @type_prefixing is %TRUE, lookups in the newly created pool will
* allow to specify the owner as a colon-separated prefix of the property name,
* like "GtkContainer:border-width". This feature is deprecated, so you should
* always set @type_prefixing to %FALSE.
*
* Returns: a newly allocated #GParamSpecPool.
*/
GParamSpecPool* GParamSpecPool*
g_param_spec_pool_new (gboolean type_prefixing) g_param_spec_pool_new (gboolean type_prefixing)
{ {
@ -642,7 +889,14 @@ g_param_spec_pool_new (gboolean type_prefixing)
return pool; return pool;
} }
void /**
* g_param_spec_pool_insert:
* @pool: a #GParamSpecPool.
* @pspec: the #GParamSpec to insert
* @owner_type: a #GType identifying the owner of @pspec
*
* Inserts a #GParamSpec in the pool.
*/void
g_param_spec_pool_insert (GParamSpecPool *pool, g_param_spec_pool_insert (GParamSpecPool *pool,
GParamSpec *pspec, GParamSpec *pspec,
GType owner_type) GType owner_type)
@ -676,6 +930,13 @@ g_param_spec_pool_insert (GParamSpecPool *pool,
} }
} }
/**
* g_param_spec_pool_remove:
* @pool: a #GParamSpecPool
* @pspec: the #GParamSpec to remove
*
* Removes a #GParamSpec from the pool.
*/
void void
g_param_spec_pool_remove (GParamSpecPool *pool, g_param_spec_pool_remove (GParamSpecPool *pool,
GParamSpec *pspec) GParamSpec *pspec)
@ -745,6 +1006,18 @@ param_spec_ht_lookup (GHashTable *hash_table,
return pspec; return pspec;
} }
/**
* g_param_spec_pool_lookup:
* @pool: a #GParamSpecPool
* @param_name: the name to look for
* @owner_type: the owner to look for
* @walk_ancestors: If %TRUE, also try to find a #GParamSpec with @param_name
* owned by an ancestor of @owner_type.
*
* Looks up a #GParamSpec in the pool.
*
* Returns: The found #GParamSpec, or %NULL if no matching #GParamSpec was found.
*/
GParamSpec* GParamSpec*
g_param_spec_pool_lookup (GParamSpecPool *pool, g_param_spec_pool_lookup (GParamSpecPool *pool,
const gchar *param_name, const gchar *param_name,
@ -822,6 +1095,16 @@ pool_list (gpointer key,
data[0] = g_list_prepend (data[0], pspec); data[0] = g_list_prepend (data[0], pspec);
} }
/**
* g_param_spec_pool_list_owned:
* @pool: a #GParamSpecPool
* @owner_type: the owner to look for
*
* Gets an #GList of all #GParamSpec<!-- -->s owned by @owner_type in the pool.
*
* Returns: a #GList of all #GParamSpec<!-- -->s owned by @owner_type in
* the pool#GParamSpec<!-- -->s.
*/
GList* GList*
g_param_spec_pool_list_owned (GParamSpecPool *pool, g_param_spec_pool_list_owned (GParamSpecPool *pool,
GType owner_type) GType owner_type)
@ -945,7 +1228,18 @@ pool_depth_list_for_interface (gpointer key,
slists[0] = g_slist_prepend (slists[0], pspec); slists[0] = g_slist_prepend (slists[0], pspec);
} }
GParamSpec** /* free result */ /**
* g_param_spec_pool_list:
* @pool: a #GParamSpecPool
* @owner_type: the owner to look for
* @n_pspecs_p: return location for the length of the returned array
*
* Gets an array of all #GParamSpec<!-- -->s owned by @owner_type in the pool.
*
* Returns: a newly allocated array containing pointers to all
* #GParamSpec<!-- -->s owned by @owner_type in the pool
*/
GParamSpec**
g_param_spec_pool_list (GParamSpecPool *pool, g_param_spec_pool_list (GParamSpecPool *pool,
GType owner_type, GType owner_type,
guint *n_pspecs_p) guint *n_pspecs_p)
@ -1038,6 +1332,18 @@ default_values_cmp (GParamSpec *pspec,
return memcmp (&value1->data, &value2->data, sizeof (value1->data)); return memcmp (&value1->data, &value2->data, sizeof (value1->data));
} }
/**
* g_param_type_register_static:
* @name: 0-terminated string used as the name of the new #GParamSpec type.
* @pspec_info: The #GParamSpecTypeInfo for this #GParamSpec type.
*
* Registers @name as the name of a new static type derived from
* #G_TYPE_PARAM. The type system uses the information contained in the
* #GParamSpecTypeInfo structure pointed to by @info to manage the #GParamSpec
* type and its instances.
*
* Returns: The new type identifier.
*/
GType GType
g_param_type_register_static (const gchar *name, g_param_type_register_static (const gchar *name,
const GParamSpecTypeInfo *pspec_info) const GParamSpecTypeInfo *pspec_info)

160
gobject/gparam.h
View File

@ -30,22 +30,103 @@
G_BEGIN_DECLS G_BEGIN_DECLS
/* --- standard type macros --- */ /* --- standard type macros --- */
/**
* G_TYPE_IS_PARAM:
* @type: a #GType ID
*
* Checks whether @type "is a" %G_TYPE_PARAM.
*/
#define G_TYPE_IS_PARAM(type) (G_TYPE_FUNDAMENTAL (type) == G_TYPE_PARAM) #define G_TYPE_IS_PARAM(type) (G_TYPE_FUNDAMENTAL (type) == G_TYPE_PARAM)
/**
* G_PARAM_SPEC:
* @pspec: a valid #GParamSpec
*
* Casts a derived #GParamSpec object (e.g. of type #GParamSpecInt) into
* a #GParamSpec object.
*/
#define G_PARAM_SPEC(pspec) (G_TYPE_CHECK_INSTANCE_CAST ((pspec), G_TYPE_PARAM, GParamSpec)) #define G_PARAM_SPEC(pspec) (G_TYPE_CHECK_INSTANCE_CAST ((pspec), G_TYPE_PARAM, GParamSpec))
/**
* G_IS_PARAM_SPEC:
* @pspec: a #GParamSpec
*
* Checks whether @pspec "is a" valid #GParamSpec structure of type %G_TYPE_PARAM
* or derived.
*/
#define G_IS_PARAM_SPEC(pspec) (G_TYPE_CHECK_INSTANCE_TYPE ((pspec), G_TYPE_PARAM)) #define G_IS_PARAM_SPEC(pspec) (G_TYPE_CHECK_INSTANCE_TYPE ((pspec), G_TYPE_PARAM))
/**
* G_PARAM_SPEC_CLASS:
* @pclass: a valid #GParamSpecClass
*
* Casts a derived #GParamSpecClass structure into a #GParamSpecClass structure.
*/
#define G_PARAM_SPEC_CLASS(pclass) (G_TYPE_CHECK_CLASS_CAST ((pclass), G_TYPE_PARAM, GParamSpecClass)) #define G_PARAM_SPEC_CLASS(pclass) (G_TYPE_CHECK_CLASS_CAST ((pclass), G_TYPE_PARAM, GParamSpecClass))
/**
* G_IS_PARAM_SPEC_CLASS:
* @pclass: a #GParamSpecClass
*
* Checks whether @pclass "is a" valid #GParamSpecClass structure of type
* %G_TYPE_PARAM or derived.
*/
#define G_IS_PARAM_SPEC_CLASS(pclass) (G_TYPE_CHECK_CLASS_TYPE ((pclass), G_TYPE_PARAM)) #define G_IS_PARAM_SPEC_CLASS(pclass) (G_TYPE_CHECK_CLASS_TYPE ((pclass), G_TYPE_PARAM))
/**
* G_PARAM_SPEC_GET_CLASS:
* @pspec: a valid #GParamSpec
*
* Retrieves the #GParamSpecClass of a #GParamSpec.
*/
#define G_PARAM_SPEC_GET_CLASS(pspec) (G_TYPE_INSTANCE_GET_CLASS ((pspec), G_TYPE_PARAM, GParamSpecClass)) #define G_PARAM_SPEC_GET_CLASS(pspec) (G_TYPE_INSTANCE_GET_CLASS ((pspec), G_TYPE_PARAM, GParamSpecClass))
/* --- convenience macros --- */ /* --- convenience macros --- */
/**
* G_PARAM_SPEC_TYPE:
* @pspec: a valid #GParamSpec
*
* Retrieves the #GType of this @pspec.
*/
#define G_PARAM_SPEC_TYPE(pspec) (G_TYPE_FROM_INSTANCE (pspec)) #define G_PARAM_SPEC_TYPE(pspec) (G_TYPE_FROM_INSTANCE (pspec))
/**
* G_PARAM_SPEC_TYPE_NAME:
* @pspec: a valid #GParamSpec
*
* Retrieves the #GType name of this @pspec.
*/
#define G_PARAM_SPEC_TYPE_NAME(pspec) (g_type_name (G_PARAM_SPEC_TYPE (pspec))) #define G_PARAM_SPEC_TYPE_NAME(pspec) (g_type_name (G_PARAM_SPEC_TYPE (pspec)))
/**
* G_PARAM_SPEC_VALUE_TYPE:
* @pspec: a valid #GParamSpec
*
* Retrieves the #GType to initialize a #GValue for this parameter.
*/
#define G_PARAM_SPEC_VALUE_TYPE(pspec) (G_PARAM_SPEC (pspec)->value_type) #define G_PARAM_SPEC_VALUE_TYPE(pspec) (G_PARAM_SPEC (pspec)->value_type)
#define G_VALUE_HOLDS_PARAM(value) (G_TYPE_CHECK_VALUE_TYPE ((value), G_TYPE_PARAM)) #define G_VALUE_HOLDS_PARAM(value) (G_TYPE_CHECK_VALUE_TYPE ((value), G_TYPE_PARAM))
/* --- flags --- */ /* --- flags --- */
/**
* GParamFlags:
* @G_PARAM_READABLE: the parameter is readable
* @G_PARAM_WRITABLE: the parameter is writable
* @G_PARAM_CONSTRUCT: the parameter will be set upon object construction
* @G_PARAM_CONSTRUCT_ONLY: the parameter will only be set upon object construction
* @G_PARAM_LAX_VALIDATION: upon parameter conversion (see g_param_value_convert())
* strict validation is not required
* @G_PARAM_STATIC_NAME: the string used as name when constructing the
* parameter is guaranteed to remain valid and
* unmodified for the lifetime of the parameter.
* Since 2.8
* @G_PARAM_PRIVATE: * @G_PARAM_STATIC_NICK: the string used as nick when constructing the
* parameter is guaranteed to remain valid and
* unmmodified for the lifetime of the parameter.
* Since 2.8
* @G_PARAM_STATIC_BLURB: the string used as blurb when constructing the
* parameter is guaranteed to remain valid and
* unmodified for the lifetime of the parameter.
* Since 2.8
*
* Through the #GParamFlags flag values, certain aspects of parameters
* can be configured.
*/
typedef enum typedef enum
{ {
G_PARAM_READABLE = 1 << 0, G_PARAM_READABLE = 1 << 0,
@ -60,10 +141,33 @@ typedef enum
G_PARAM_STATIC_NICK = 1 << 6, G_PARAM_STATIC_NICK = 1 << 6,
G_PARAM_STATIC_BLURB = 1 << 7 G_PARAM_STATIC_BLURB = 1 << 7
} GParamFlags; } GParamFlags;
/**
* G_PARAM_READWRITE:
*
* #GParamFlags value alias for %G_PARAM_READABLE | %G_PARAM_WRITABLE.
*/
#define G_PARAM_READWRITE (G_PARAM_READABLE | G_PARAM_WRITABLE) #define G_PARAM_READWRITE (G_PARAM_READABLE | G_PARAM_WRITABLE)
/**
* G_PARAM_STATIC_STRINGS:
*
* #GParamFlags value alias for %G_PARAM_STATIC_NAME | %G_PARAM_STATIC_NICK | %G_PARAM_STATIC_BLURB.
*
* Since 2.13.0
*/
#define G_PARAM_STATIC_STRINGS (G_PARAM_STATIC_NAME | G_PARAM_STATIC_NICK | G_PARAM_STATIC_BLURB) #define G_PARAM_STATIC_STRINGS (G_PARAM_STATIC_NAME | G_PARAM_STATIC_NICK | G_PARAM_STATIC_BLURB)
#define G_PARAM_MASK (0x000000ff)
/* bits in the range 0xffffff00 are reserved for 3rd party usage */ /* bits in the range 0xffffff00 are reserved for 3rd party usage */
/**
* G_PARAM_MASK:
*
* Mask containing the bits of #GParamSpec.flags which are reserved for GLib.
*/
#define G_PARAM_MASK (0x000000ff)
/**
* G_PARAM_USER_SHIFT:
*
* Minimum shift count to be used for user defined flags, to be stored in
* #GParamSpec.flags.
*/
#define G_PARAM_USER_SHIFT (8) #define G_PARAM_USER_SHIFT (8)
@ -72,6 +176,17 @@ typedef struct _GParamSpec GParamSpec;
typedef struct _GParamSpecClass GParamSpecClass; typedef struct _GParamSpecClass GParamSpecClass;
typedef struct _GParameter GParameter; typedef struct _GParameter GParameter;
typedef struct _GParamSpecPool GParamSpecPool; typedef struct _GParamSpecPool GParamSpecPool;
/**
* GParamSpec:
* @g_type_instance: private #GTypeInstance portion
* @name: name of this parameter
* @flags: #GParamFlags flags for this parameter
* @value_type: the #GValue type for this parameter
* @owner_type: #GType type that uses (introduces) this paremeter
*
* All fields of the <structname>GParamSpec</structname> struct are private and
* should not be used directly, except for the following:
*/
struct _GParamSpec struct _GParamSpec
{ {
GTypeInstance g_type_instance; GTypeInstance g_type_instance;
@ -88,6 +203,25 @@ struct _GParamSpec
guint ref_count; guint ref_count;
guint param_id; /* sort-criteria */ guint param_id; /* sort-criteria */
}; };
/**
* GParamSpecClass:
* @g_type_class: the parent class
* @value_type: the #GValue type for this parameter
* @finalize: The instance finalization function (optional), should chain
* up to the finalize method of the parent class.
* @value_set_default: Resets a @value to the default value for this type
* (recommended, the default is g_value_reset()), see
* g_param_value_set_default().
* @value_validate: Ensures that the contents of @value comply with the
* specifications set out by this type (optional), see
* g_param_value_set_validate().
* @values_cmp: Compares @value1 with @value2 according to this type
* (recommended, the default is memcmp()), see g_param_values_cmp().
*
* The class structure for the <structname>GParamSpec</structname> type.
* Normally, <structname>GParamSpec</structname> classes are filled by
* g_param_type_register_static().
*/
struct _GParamSpecClass struct _GParamSpecClass
{ {
GTypeClass g_type_class; GTypeClass g_type_class;
@ -163,6 +297,30 @@ void g_value_set_param_take_ownership (GValue *value,
/* --- convenience functions --- */ /* --- convenience functions --- */
typedef struct _GParamSpecTypeInfo GParamSpecTypeInfo; typedef struct _GParamSpecTypeInfo GParamSpecTypeInfo;
/**
* GParamSpecTypeInfo:
* @instance_size: Size of the instance (object) structure.
* @n_preallocs: Prior to GLib 2.10, it specified the number of pre-allocated (cached) instances to reserve memory for (0 indicates no caching). Since GLib 2.10, it is ignored, since instances are allocated with the <link linkend="glib-Memory-Slices">slice allocator</link> now.
* @instance_init: Location of the instance initialization function (optional).
* @value_type: The #GType of values conforming to this #GParamSpec
* @finalize: The instance finalization function (optional).
* @value_set_default: Resets a @value to the default value for @pspec
* (recommended, the default is g_value_reset()), see
* g_param_value_set_default().
* @value_validate: Ensures that the contents of @value comply with the
* specifications set out by @pspec (optional), see
* g_param_value_set_validate().
* @values_cmp: Compares @value1 with @value2 according to @pspec
* (recommended, the default is memcmp()), see g_param_values_cmp().
*
* This structure is used to provide the type system with the information
* required to initialize and destruct (finalize) a parameter's class and
* instances thereof.
* The initialized structure is passed to the g_param_type_register_static()
* The type system will perform a deep copy of this structure, so it's memory
* does not need to be persistent across invocation of
* g_param_type_register_static().
*/
struct _GParamSpecTypeInfo struct _GParamSpecTypeInfo
{ {
/* type system portion */ /* type system portion */