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.\" ========================================================================
.\"
.IX Title "Gtk2::TreeIter 3pm"
.TH Gtk2::TreeIter 3pm "2019-09-16" "perl v5.28.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
Gtk2::TreeIter \- wrapper for GtkTreeIter
.SH "HIERARCHY"
.IX Header "HIERARCHY"
.Vb 2
\&  Glib::Boxed
\&  +\-\-\-\-Gtk2::TreeIter
.Ve
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&  package MyCustomListStore;
\&
\&  use Glib::Object::Subclass
\&      Glib::Object::,
\&      interfaces => [ Gtk2::TreeModel:: ],
\&      ;
\&
\&  ...
\&
\&  sub set {
\&      my $list = shift;
\&      my $iter = shift; # a Gtk2::TreeIter
\&
\&      # this method needs access to the internal representation
\&      # of the iter, as the model implementation sees it:
\&      my $arrayref = $iter\->to_arrayref ($list\->{stamp});
\&      ...
\&  }
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The methods described here are only of use in custom Gtk2::TreeModel
implementations; they are not safe to be used on generic iters or in
application code.  See \*(L"\s-1CREATING A CUSTOM TREE MODEL\*(R"\s0 in Gtk2::TreeModel for
more information.
.SH "METHODS"
.IX Header "METHODS"
.SS "treeiter = Gtk2::TreeIter\->\fBnew_from_arrayref\fP ($sv_iter)"
.IX Subsection "treeiter = Gtk2::TreeIter->new_from_arrayref ($sv_iter)"
.IP "\(bu" 4
\&\f(CW$sv_iter\fR (scalar)
.PP
Create a new Gtk2::TreeIter from the \*(L"internal\*(R" array reference representation
used by custom Gtk2::TreeModel implementations.  This is the complement to
\&\fBGtk2::TreeIter::to_arrayref()\fR, and is used when you need to create and return
a new iter from a method that is not one of the Gtk2::TreeModelIface
interface vfuncs.  See \*(L"\s-1CREATING A CUSTOM TREE MODEL\*(R"\s0 in Gtk2::TreeModel for
more information.
.ie n .SS "$iter\->\fBset\fP ($from)"
.el .SS "\f(CW$iter\fP\->\fBset\fP ($from)"
.IX Subsection "$iter->set ($from)"
.IP "\(bu" 4
\&\f(CW$from\fR (scalar)
.PP
Set the contents of \f(CW$iter\fR.  \f(CW$from\fR can be either another Gtk2::TreeIter
or an \*(L"internal\*(R" arrayref form as above.
.PP
Often you create a new iter instead of modifying an existing one, but
\&\f(CW\*(C`set\*(C'\fR lets you to implement things in the style of the \f(CW\*(C`remove\*(C'\fR
method of Gtk2::ListStore and Gtk2::TreeStore.
.PP
A set can also explicitly invalidate an iter by zapping its stamp, so
nobody can accidentally use it again.
.PP
.Vb 1
\&    $iter\->set ([0,0,undef,undef]);
.Ve
.ie n .SS "scalar = $iter\->\fBto_arrayref\fP ($stamp)"
.el .SS "scalar = \f(CW$iter\fP\->\fBto_arrayref\fP ($stamp)"
.IX Subsection "scalar = $iter->to_arrayref ($stamp)"
.IP "\(bu" 4
\&\f(CW$stamp\fR (integer)
.PP
Convert a boxed Gtk2::TreeIter reference into the \*(L"internal\*(R" array reference
representation used by custom Gtk2::TreeModel implementations.  This is
necessary when you need to get to the data inside your iters in methods
which are not the vfuncs of the Gtk2::TreeModelIface interface.  The stamp
must match; this protects the binding code from potential memory faults
when attempting to convert an iter that doesn't actually belong to your
model.  See \*(L"\s-1CREATING A CUSTOM TREE MODEL\*(R"\s0 in Gtk2::TreeModel for
more information.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Gtk2, Glib::Boxed, Gtk2::TreeModel
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright (C) 2003\-2011 by the gtk2\-perl team.
.PP
This software is licensed under the \s-1LGPL.\s0  See Gtk2 for a full notice.