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280a213b09
2003-02-07 Matthias Clasen <maclas@gmx.de> * gobject/tmpl/gtypemodule.sgml: * gobject/tmpl/gtype.sgml: * gobject/tmpl/gclosure.sgml: * gobject/tmpl/param_value_types.sgml: * gobject/tmpl/gparamspec.sgml: * gobject/tmpl/objects.sgml: * gobject/tmpl/signals.sgml: Move all docs out-of-line. Boy, what a waste of time.
429 lines
8.9 KiB
Plaintext
429 lines
8.9 KiB
Plaintext
<!-- ##### SECTION Title ##### -->
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GParamSpec
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<!-- ##### SECTION Short_Description ##### -->
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Metadata for parameter specifications
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<!-- ##### SECTION Long_Description ##### -->
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<para>
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#GParamSpec is an object structure that encapsulates the metadata
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required to specify parameters, such as e.g. #GObject properties.
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</para>
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<!-- ##### SECTION See_Also ##### -->
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<para>
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g_object_class_install_property(), g_object_set(), g_object_get(),
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g_object_set_property(), g_object_get_property(), g_value_register_transform_func()
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</para>
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<!-- ##### MACRO G_TYPE_IS_PARAM ##### -->
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<para>
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Returns whether @type "is a" %G_TYPE_PARAM.
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</para>
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@type: a #GType ID
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<!-- ##### MACRO G_PARAM_SPEC ##### -->
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<para>
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Cast a derived #GParamSpec object (e.g. of type #GParamSpecInt) into
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a #GParamSpec object.
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</para>
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@pspec: a valid #GParamSpec
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<!-- ##### MACRO G_IS_PARAM_SPEC ##### -->
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<para>
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Check whether @pspec "is a" valid #GParamSpec structure of type %G_TYPE_PARAM
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or derived.
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</para>
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@pspec: a #GParamSpec
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<!-- ##### MACRO G_PARAM_SPEC_CLASS ##### -->
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<para>
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Cast a derived #GParamSpecClass structure into a #GParamSpecClass structure.
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</para>
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@pclass: a valid #GParamSpecClass
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<!-- ##### MACRO G_IS_PARAM_SPEC_CLASS ##### -->
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<para>
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Check whether @pclass "is a" valid #GParamSpecClass structure of type %G_TYPE_PARAM
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or derived.
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</para>
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@pclass: a #GParamSpecClass
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<!-- ##### MACRO G_PARAM_SPEC_GET_CLASS ##### -->
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<para>
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Retrieve the #GParamSpecClass of a #GParamSpec.
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</para>
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@pspec: a valid #GParamSpec
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<!-- ##### MACRO G_PARAM_SPEC_TYPE ##### -->
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<para>
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Retrieve the #GType of this @pspec.
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</para>
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@pspec: a valid #GParamSpec
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<!-- ##### MACRO G_PARAM_SPEC_TYPE_NAME ##### -->
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<para>
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Retrieve the #GType name of this @pspec.
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</para>
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@pspec: a valid #GParamSpec
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<!-- ##### MACRO G_PARAM_SPEC_VALUE_TYPE ##### -->
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<para>
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Retrieve the #GType to intiialize a #GValue for this parameter.
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</para>
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@pspec: a valid #GParamSpec
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<!-- ##### STRUCT GParamSpec ##### -->
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<para>
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</para>
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@g_type_instance: private #GTypeInstance portion
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@name: name of this parameter
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@flags: #GParamFlags flags for this parameter
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@value_type: the #GValue type for this parameter
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@owner_type: #GType type that uses (introduces) this paremeter
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<!-- ##### STRUCT GParamSpecClass ##### -->
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<para>
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</para>
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<!-- ##### ENUM GParamFlags ##### -->
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<para>
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Through the #GParamFlags flag values, certain aspects of parameters
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can be configured.
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</para>
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@G_PARAM_READABLE: the parameter is readable
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@G_PARAM_WRITABLE: the parameter is writable
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@G_PARAM_CONSTRUCT: the parameter will be set upon object construction
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@G_PARAM_CONSTRUCT_ONLY: the parameter will only be set upon object construction
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@G_PARAM_LAX_VALIDATION: upon parameter conversion (see g_param_value_convert())
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strict validation is not required
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@G_PARAM_PRIVATE:
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<!-- ##### MACRO G_PARAM_READWRITE ##### -->
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<para>
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#GParamFlags value alias for %G_PARAM_READABLE | %G_PARAM_WRITABLE.
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</para>
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<!-- ##### MACRO G_PARAM_MASK ##### -->
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<para>
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Mask containing the bits of #GParamSpec.flags which are reserved for GLib.
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</para>
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<!-- ##### MACRO G_PARAM_USER_SHIFT ##### -->
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<para>
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Minimum shift count to be used for user defined flags, to be stored in
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#GParamSpec.flags.
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</para>
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<!-- ##### FUNCTION g_param_spec_ref ##### -->
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<para>
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Increment the reference count of @pspec.
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</para>
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@pspec: a valid #GParamSpec
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@Returns: the #GParamSpec that was passed into this function
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<!-- ##### FUNCTION g_param_spec_unref ##### -->
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<para>
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Decrement the reference count of a @pspec.
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</para>
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@pspec: a valid #GParamSpec
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<!-- ##### FUNCTION g_param_spec_sink ##### -->
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<para>
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The initial reference count of a newly created #GParamSpec is 1,
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eventhough no one has explicitely called g_param_spec_ref() on it yet.
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So the einital reference count is flagged as "floating", untill someone
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calls: g_param_spec_ref (@pspec); g_param_spec_sink (@pspec);
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in sequence on it, taking over the initial reference count (thus
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ending up with a @pspec that has a reference count of 1 still, but is
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not flagged "floating" anymore).
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</para>
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@pspec: a valid #GParamSpec
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<!-- ##### FUNCTION g_param_value_set_default ##### -->
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<para>
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Set @value to its default value as specified in @pspec.
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</para>
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@pspec: a valid #GParamSpec
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@value: a #GValue of correct type for @pspec
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<!-- ##### FUNCTION g_param_value_defaults ##### -->
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<para>
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Check whether @value contains the default value as specified in @pspec.
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</para>
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@pspec: a valid #GParamSpec
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@value: a #GValue of correct type for @pspec
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@Returns: whether @value contains the canonical defualt for this @pspec
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<!-- ##### FUNCTION g_param_value_validate ##### -->
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<para>
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Ensure that the contents of @value comply with the specifications
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set out by @pspec. For example, a #GParamSpecInt might require
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that integers stored in @value may not be smaller than -42 and not be
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greater than +42. If @value contains an integer outside of this range,
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it is modified accordingly, so the resulting value will fit into the
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range -42 .. +42.
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</para>
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@pspec: a valid #GParamSpec
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@value: a #GValue of correct type for @pspec
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@Returns: whether modifying @value was necessary to ensure validity
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<!-- ##### FUNCTION g_param_value_convert ##### -->
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<para>
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This function transforms @src_value into @dest_value if possible,
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and then validates @dest_value, in order for it to conform to
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@pspec.
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If @strict_validation is %TRUE this function will only suceed if
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the transformed @dest_value complied to @pspec without modifications.
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See also g_value_type_transformable(), g_value_transform() and
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g_param_value_validate().
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</para>
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@pspec: a valid #GParamSpec
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@src_value: souce #GValue
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@dest_value: destination #GValue of correct type for @pspec
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@strict_validation: %TRUE requires @dest_value to conform to @pspec without modifications
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@Returns: %TRUE if transformation and validation were successfull,
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%FALSE otherwise and @dest_value is left untouched.
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<!-- ##### FUNCTION g_param_values_cmp ##### -->
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<para>
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Compare @value1 with @value2 according to @pspec, and return -1, 0 or +1,
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if @value1 is found to be less than, equal to or greater than @value2, respectively.
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</para>
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@pspec: a valid #GParamSpec
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@value1: a #GValue of correct type for @pspec
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@value2: a #GValue of correct type for @pspec
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@Returns: -1, 0 or +1, for a less than, equal to or greater than result
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<!-- ##### FUNCTION g_param_spec_get_name ##### -->
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<para>
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</para>
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@pspec:
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@Returns:
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<!-- ##### FUNCTION g_param_spec_get_nick ##### -->
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<para>
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</para>
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@pspec:
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@Returns:
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<!-- ##### FUNCTION g_param_spec_get_blurb ##### -->
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<para>
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</para>
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@pspec:
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@Returns:
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<!-- ##### FUNCTION g_param_spec_get_qdata ##### -->
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<para>
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</para>
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@pspec:
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@quark:
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@Returns:
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<!-- ##### FUNCTION g_param_spec_set_qdata ##### -->
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<para>
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</para>
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@pspec:
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@quark:
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@data:
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<!-- ##### FUNCTION g_param_spec_set_qdata_full ##### -->
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<para>
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</para>
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@pspec:
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@quark:
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@data:
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@destroy:
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<!-- ##### FUNCTION g_param_spec_steal_qdata ##### -->
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<para>
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</para>
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@pspec:
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@quark:
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@Returns:
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<!-- ##### FUNCTION g_param_spec_internal ##### -->
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<para>
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Creates a new #GParamSpec instance.
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</para>
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<para>
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A property name consists of segments consisting of ASCII letters and
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digits, separated by either the '-' or '_' character. The first
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character of a property name must be a letter. Names which violate these
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rules lead to undefined behaviour.
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</para>
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<para>
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When creating and looking up a #GParamSpec, either separator can be used,
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but they cannot be mixed. Using '-' is considerably more efficient and in
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fact required when using property names as detail strings for signals.
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</para>
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@param_type: the #GType for the property; must be derived from #G_TYPE_PARAM
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@name: the canonical name of the property
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@nick: the nickname of the property
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@blurb: a short description of the property
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@flags: a combination of #GParamFlags
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@Returns: a newly allocated #GParamSpec instance
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<!-- ##### STRUCT GParamSpecTypeInfo ##### -->
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<para>
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</para>
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@instance_size:
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@n_preallocs:
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@instance_init:
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@value_type:
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@finalize:
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@value_set_default:
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@value_validate:
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@values_cmp:
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<!-- ##### FUNCTION g_param_type_register_static ##### -->
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<para>
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</para>
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@name:
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@pspec_info:
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@Returns:
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<!-- ##### STRUCT GParamSpecPool ##### -->
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<para>
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</para>
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<!-- ##### FUNCTION g_param_spec_pool_new ##### -->
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<para>
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</para>
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@type_prefixing:
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@Returns:
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<!-- ##### FUNCTION g_param_spec_pool_insert ##### -->
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<para>
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</para>
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@pool:
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@pspec:
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@owner_type:
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<!-- ##### FUNCTION g_param_spec_pool_remove ##### -->
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<para>
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</para>
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@pool:
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@pspec:
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<!-- ##### FUNCTION g_param_spec_pool_lookup ##### -->
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<para>
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</para>
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@pool:
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@param_name:
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@owner_type:
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@walk_ancestors:
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@Returns:
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<!-- # Unused Parameters # -->
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@trailer_p:
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<!-- ##### FUNCTION g_param_spec_pool_list ##### -->
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<para>
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</para>
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@pool:
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@owner_type:
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@n_pspecs_p:
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@Returns:
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<!-- ##### FUNCTION g_param_spec_pool_list_owned ##### -->
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<para>
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</para>
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@pool:
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@owner_type:
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@Returns:
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