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File Name : ParamSpec.pod

=head1 NAME

Glib::ParamSpec

=cut

=for position DESCRIPTION

=head1 DESCRIPTION

Glib::ParamSpec encapsulates the metadata required to specify parameters.
You will see these most often when creating new Glib::Object types; see
C<< Glib::Type->register >> and L<Glib::Object::Subclass>.

Parameter specifications allow you to provide limits for validation as 
well as nicknames and blurbs to document the parameters.  Blurbs show up
in reference documentation such as this page or the gtk+ C API reference;
i'm not really sure where the nicknames get used.  The Perl bindings for
the most part ignore the difference between dashes and underscores in
the paramspec names, which typically find use as the actual keys for 
object parameters.

It's worth noting that Glib offers various sizes of integer and floating
point values, while Perl really only deals with full integers and double
precision floating point values.  The size distinction is important for
the underlying C libraries.

=cut

=head1 HIERARCHY

Glib::ParamSpec

=cut

=head1 METHODS

=head2 paramspec = Glib::ParamSpec-E<gt>B<IV> ($name, $nick, $blurb, $minimum, $maximum, $default_value, $flags)

=over

=item * $name (string)

=item * $nick (string)

=item * $blurb (string)

=item * $minimum (integer)

=item * $maximum (integer)

=item * $default_value (integer)

=item * $flags (Glib::ParamFlags)

=back

=head2 paramspec = Glib::ParamSpec-E<gt>B<UV> ($name, $nick, $blurb, $minimum, $maximum, $default_value, $flags)

=over

=item * $name (string)

=item * $nick (string)

=item * $blurb (string)

=item * $minimum (unsigned)

=item * $maximum (unsigned)

=item * $default_value (unsigned)

=item * $flags (Glib::ParamFlags)

=back

=head2 string = $pspec-E<gt>B<get_blurb>

=head2 paramspec = Glib::ParamSpec-E<gt>B<boolean> ($name, $nick, $blurb, $default_value, $flags)

=over

=item * $name (string)

=item * $nick (string)

=item * $blurb (string)

=item * $default_value (boolean)

=item * $flags (Glib::ParamFlags)

=back

=head2 paramspec = Glib::ParamSpec-E<gt>B<boxed> ($name, $nick, $blurb, $package, $flags)

=over

=item * $name (string)

=item * $nick (string)

=item * $blurb (string)

=item * $package (string) name of the class, derived from Glib::Boxed, of the objects this property will hold.

=item * $flags (Glib::ParamFlags)

=back

=head2 paramspec = Glib::ParamSpec-E<gt>B<char> ($name, $nick, $blurb, $minimum, $maximum, $default_value, $flags)

=over

=item * $name (string)

=item * $nick (string)

=item * $blurb (string)

=item * $minimum (integer)

=item * $maximum (integer)

=item * $default_value (integer)

=item * $flags (Glib::ParamFlags)

=back

=head2 scalar = $pspec-E<gt>B<get_default_value>

(This is the C level C<g_param_value_set_default> function.)

Note that on a C<Glib::Param::Unichar> the return is a single-char
string.  This is the same as the constructor
C<< Glib::ParamSpec->unichar >>, but it's not the same as
C<Glib::Object> C<< get_property >> / C<< set_property >>, so an
C<ord()> conversion is needed if passing the default value to a
unichar C<set_property>.

=head2 paramspec = Glib::ParamSpec-E<gt>B<double> ($name, $nick, $blurb, $minimum, $maximum, $default_value, $flags)

=over

=item * $name (string)

=item * $nick (string)

=item * $blurb (string)

=item * $minimum (double)

=item * $maximum (double)

=item * $default_value (double)

=item * $flags (Glib::ParamFlags)

=back

=head2 paramspec = Glib::ParamSpec-E<gt>B<enum> ($name, $nick, $blurb, $enum_type, $default_value, $flags)

=over

=item * $name (string)

=item * $nick (string)

=item * $blurb (string)

=item * $enum_type (string)

=item * $default_value (scalar)

=item * $flags (Glib::ParamFlags)

=back

=head2 paramspec = Glib::ParamSpec-E<gt>B<flags> ($name, $nick, $blurb, $flags_type, $default_value, $flags)

=over

=item * $name (string)

=item * $nick (string)

=item * $blurb (string)

=item * $flags_type (string)

=item * $default_value (scalar)

=item * $flags (Glib::ParamFlags)

=back

=head2 paramflags = $pspec-E<gt>B<get_flags>

=head2 paramspec = Glib::ParamSpec-E<gt>B<float> ($name, $nick, $blurb, $minimum, $maximum, $default_value, $flags)

=over

=item * $name (string)

=item * $nick (string)

=item * $blurb (string)

=item * $minimum (double)

=item * $maximum (double)

=item * $default_value (double)

=item * $flags (Glib::ParamFlags)

=back

=head2 paramspec = Glib::ParamSpec-E<gt>B<gtype> ($name, $nick, $blurb, $is_a_type, $flags)

=over

=item * $name (string)

=item * $nick (string)

=item * $blurb (string)

=item * $is_a_type (string or undef) The name of a class whose subtypes are allowed as values of the property.  Use C<undef> to allow any type.

=item * $flags (Glib::ParamFlags)

=back

Since: glib 2.10

=head2 paramspec = Glib::ParamSpec-E<gt>B<int> ($name, $nick, $blurb, $minimum, $maximum, $default_value, $flags)

=over

=item * $name (string)

=item * $nick (string)

=item * $blurb (string)

=item * $minimum (integer)

=item * $maximum (integer)

=item * $default_value (integer)

=item * $flags (Glib::ParamFlags)

=back

=head2 paramspec = Glib::ParamSpec-E<gt>B<int64> ($name, $nick, $blurb, $minimum, $maximum, $default_value, $flags)

=over

=item * $name (string)

=item * $nick (string)

=item * $blurb (string)

=item * $minimum (64 bit integer)

=item * $maximum (64 bit integer)

=item * $default_value (64 bit integer)

=item * $flags (Glib::ParamFlags)

=back

=head2 paramspec = Glib::ParamSpec-E<gt>B<long> ($name, $nick, $blurb, $minimum, $maximum, $default_value, $flags)

=over

=item * $name (string)

=item * $nick (string)

=item * $blurb (string)

=item * $minimum (integer)

=item * $maximum (integer)

=item * $default_value (integer)

=item * $flags (Glib::ParamFlags)

=back

=head2 string = $paramspec->B<get_name>

Dashes in the name are converted to underscores.

=head2 string = $pspec-E<gt>B<get_nick>

=head2 paramspec = Glib::ParamSpec-E<gt>B<object> ($name, $nick, $blurb, $package, $flags)

=over

=item * $name (string)

=item * $nick (string)

=item * $blurb (string)

=item * $package (string) name of the class, derived from Glib::Object, of the objects this property will hold.

=item * $flags (Glib::ParamFlags)

=back

=head2 paramspec = Glib::ParamSpec-E<gt>B<override> ($name, $overridden)

=over

=item * $name (string)

=item * $overridden (Glib::ParamSpec)

=back

Since: glib 2.4

=head2 string = $pspec-E<gt>B<get_owner_type>

=head2 paramspec = Glib::ParamSpec-E<gt>B<param_spec> ($name, $nick, $blurb, $package, $flags)

=over

=item * $name (string)

=item * $nick (string)

=item * $blurb (string)

=item * $package (string) name of the class, derived from Glib::ParamSpec, of the objects this property will hold.

=item * $flags (Glib::ParamFlags)

=back

=head2 paramspec or undef = $pspec-E<gt>B<get_redirect_target>

Since: glib 2.4

=head2 paramspec = Glib::ParamSpec-E<gt>B<scalar> ($name, $nick, $blurb, $flags)

=over

=item * $name (string)

=item * $nick (string)

=item * $blurb (string)

=item * $flags (Glib::ParamFlags)

=back

ParamSpec to be used for any generic perl scalar, including references to
complex objects.

Currently C<Gtk2::Builder> cannot set object properties of this type
(there's no hooks for property value parsing, as of Gtk 2.20), so
prefer the builtin types if buildable support for an object matters.
A C<boxed> of C<Glib::Strv> can give an array of strings.  A signal
handler callback can do most of what a coderef might.

=head2 paramspec = Glib::ParamSpec-E<gt>B<string> ($name, $nick, $blurb, $default_value, $flags)

=over

=item * $name (string)

=item * $nick (string)

=item * $blurb (string)

=item * $default_value (string or undef)

=item * $flags (Glib::ParamFlags)

=back

=head2 paramspec = Glib::ParamSpec-E<gt>B<uchar> ($name, $nick, $blurb, $minimum, $maximum, $default_value, $flags)

=over

=item * $name (string)

=item * $nick (string)

=item * $blurb (string)

=item * $minimum (unsigned)

=item * $maximum (unsigned)

=item * $default_value (unsigned)

=item * $flags (Glib::ParamFlags)

=back

=head2 paramspec = Glib::ParamSpec-E<gt>B<uint> ($name, $nick, $blurb, $minimum, $maximum, $default_value, $flags)

=over

=item * $name (string)

=item * $nick (string)

=item * $blurb (string)

=item * $minimum (unsigned)

=item * $maximum (unsigned)

=item * $default_value (unsigned)

=item * $flags (Glib::ParamFlags)

=back

=head2 paramspec = Glib::ParamSpec-E<gt>B<uint64> ($name, $nick, $blurb, $minimum, $maximum, $default_value, $flags)

=over

=item * $name (string)

=item * $nick (string)

=item * $blurb (string)

=item * $minimum (64 bit unsigned)

=item * $maximum (64 bit unsigned)

=item * $default_value (64 bit unsigned)

=item * $flags (Glib::ParamFlags)

=back

=head2 paramspec = Glib::ParamSpec-E<gt>B<ulong> ($name, $nick, $blurb, $minimum, $maximum, $default_value, $flags)

=over

=item * $name (string)

=item * $nick (string)

=item * $blurb (string)

=item * $minimum (unsigned)

=item * $maximum (unsigned)

=item * $default_value (unsigned)

=item * $flags (Glib::ParamFlags)

=back

=head2 paramspec = Glib::ParamSpec-E<gt>B<unichar> ($name, $nick, $blurb, $default_value, $flags)

=over

=item * $name (string)

=item * $nick (string)

=item * $blurb (string)

=item * $default_value (character)

=item * $flags (Glib::ParamFlags)

=back

=head2 string = $pspec-E<gt>B<get_value_type>

=head2 bool = $paramspec->B<value_validate> ($value)

=head2 (bool, newval) = $paramspec->B<value_validate> ($value)

=over

=item * $value (scalar)

=back

In scalar context return true if $value must be modified to be valid
for $paramspec, or false if it's valid already.  In array context
return also a new value which is $value made valid.

$value must be the right type for $paramspec (with usual stringizing,
numizing, etc).  C<value_validate> checks the further restrictions
such as minimum and maximum for a numeric type or allowed characters
in a string.  The "made valid" return is then for instance clamped to
the min/max, or offending chars replaced by a substitutor.

=head2 integer = $pspec-E<gt>B<values_cmp> ($value1, $value2)

=over

=item * $value1 (scalar)

=item * $value2 (scalar)

=back

Compares I<value1> with I<value2> according to I<pspec>, and returns -1, 0 or
+1, if value1 is found to be less than, equal to or greater than value2,
respectively.

=cut

=head1 ENUMS AND FLAGS

=head2 flags Glib::ParamFlags

=over

=item * 'readable' / 'G_PARAM_READABLE'

=item * 'writable' / 'G_PARAM_WRITABLE'

=item * 'construct' / 'G_PARAM_CONSTRUCT'

=item * 'construct-only' / 'G_PARAM_CONSTRUCT_ONLY'

=item * 'lax-validation' / 'G_PARAM_LAX_VALIDATION'

=item * 'private' / 'G_PARAM_PRIVATE'

=back

=cut

=head1 SEE ALSO

L<Glib>

=cut

=head1 COPYRIGHT

This software is licensed under the LGPL.  See L<Glib> for a full notice.

=cut

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	0755	2023-08-25 11:53:14
..	dir	-	root/root	0755	2026-01-21 04:52:00
Install	dir	-	root/root	0755	2023-08-25 11:53:14
Object	dir	-	root/root	0755	2023-08-25 11:52:52
Param	dir	-	root/root	0755	2023-08-25 11:52:51
BookmarkFile.pod	text/html	12.42 KB	root/root	0644	2014-07-08 04:13:46
Boxed.pod	text/plain	761 B	root/root	0644	2014-07-08 04:13:46
CodeGen.pm	text/plain	20.73 KB	root/root	0644	2014-05-18 11:34:32
Error.pod	text/plain	4.91 KB	root/root	0644	2014-07-08 04:13:46
Flags.pod	text/plain	2.61 KB	root/root	0644	2014-07-08 04:13:46
GenPod.pm	text/plain	38.71 KB	root/root	0644	2014-05-18 11:34:45
KeyFile.pod	text/plain	11.8 KB	root/root	0644	2014-07-08 04:13:46
Log.pod	text/plain	3.92 KB	root/root	0644	2014-07-08 04:13:46
MainLoop.pod	text/plain	6.11 KB	root/root	0644	2014-07-08 04:13:46
MakeHelper.pm	text/plain	17.61 KB	root/root	0644	2014-05-18 11:34:51
Markup.pod	text/plain	334 B	root/root	0644	2014-07-08 04:13:46
Object.pod	text/plain	11.67 KB	root/root	0644	2014-07-08 04:13:46
OptionContext.pod	text/plain	2.09 KB	root/root	0644	2014-07-08 04:13:46
OptionGroup.pod	text/plain	2.69 KB	root/root	0644	2014-07-08 04:13:46
ParamSpec.pod	text/plain	10.81 KB	root/root	0644	2014-07-08 04:13:46
ParseXSDoc.pm	text/plain	22.53 KB	root/root	0644	2014-05-18 11:34:56
Signal.pod	text/plain	2.8 KB	root/root	0644	2014-07-08 04:13:46
Type.pod	text/plain	11.73 KB	root/root	0644	2014-07-08 04:13:46
Utils.pod	text/plain	4.37 KB	root/root	0644	2014-07-08 04:13:46
devel.pod	text/plain	14.84 KB	root/root	0644	2011-12-26 04:32:19
index.pod	text/plain	688 B	root/root	0644	2014-07-08 04:13:46
version.pod	text/plain	6.23 KB	root/root	0644	2014-07-08 04:13:46
xsapi.pod	text/plain	39.82 KB	root/root	0644	2014-07-08 04:13:46

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