1Gtk2::TreeIter(3)     User Contributed Perl Documentation    Gtk2::TreeIter(3)
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NAME

6       Gtk2::TreeIter - wrapper for GtkTreeIter
7

HIERARCHY

9         Glib::Boxed
10         +----Gtk2::TreeIter
11

SYNOPSIS

13         package MyCustomListStore;
14
15         use Glib::Object::Subclass
16             Glib::Object::,
17             interfaces => [ Gtk2::TreeModel:: ],
18             ;
19
20         ...
21
22         sub set {
23             my $list = shift;
24             my $iter = shift; # a Gtk2::TreeIter
25
26             # this method needs access to the internal representation
27             # of the iter, as the model implementation sees it:
28             my $arrayref = $iter->to_arrayref ($list->{stamp});
29             ...
30         }
31

DESCRIPTION

33       The methods described here are only of use in custom Gtk2::TreeModel
34       implementations; they are not safe to be used on generic iters or in
35       application code.  See "CREATING A CUSTOM TREE MODEL" in
36       Gtk2::TreeModel for more information.
37

METHODS

39   treeiter = Gtk2::TreeIter->new_from_arrayref ($sv_iter)
40       ·   $sv_iter (scalar)
41
42       Create a new Gtk2::TreeIter from the "internal" array reference
43       representation used by custom Gtk2::TreeModel implementations.  This is
44       the complement to Gtk2::TreeIter::to_arrayref(), and is used when you
45       need to create and return a new iter from a method that is not one of
46       the Gtk2::TreeModelIface interface vfuncs.  See "CREATING A CUSTOM TREE
47       MODEL" in Gtk2::TreeModel for more information.
48
49   $iter->set ($from)
50       ·   $from (scalar)
51
52       Set the contents of $iter.  $from can be either another Gtk2::TreeIter
53       or an "internal" arrayref form as above.
54
55       Often you create a new iter instead of modifying an existing one, but
56       "set" lets you to implement things in the style of the "remove" method
57       of Gtk2::ListStore and Gtk2::TreeStore.
58
59       A set can also explicitly invalidate an iter by zapping its stamp, so
60       nobody can accidentally use it again.
61
62           $iter->set ([0,0,undef,undef]);
63
64   scalar = $iter->to_arrayref ($stamp)
65       ·   $stamp (integer)
66
67       Convert a boxed Gtk2::TreeIter reference into the "internal" array
68       reference representation used by custom Gtk2::TreeModel
69       implementations.  This is necessary when you need to get to the data
70       inside your iters in methods which are not the vfuncs of the
71       Gtk2::TreeModelIface interface.  The stamp must match; this protects
72       the binding code from potential memory faults when attempting to
73       convert an iter that doesn't actually belong to your model.  See
74       "CREATING A CUSTOM TREE MODEL" in Gtk2::TreeModel for more information.
75

SEE ALSO

77       Gtk2, Glib::Boxed, Gtk2::TreeModel
78

80       Copyright (C) 2003-2011 by the gtk2-perl team.
81
82       This software is licensed under the LGPL.  See Gtk2 for a full notice.
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86perl v5.30.0                      2019-07-26                 Gtk2::TreeIter(3)
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