NAME

       Gtk2::TreeSortable - wrapper for GtkTreeSortable

HIERARCHY

         Glib::Interface
         +----Gtk2::TreeSortable

METHODS

   $sortable->set_default_sort_func ($sort_func, $user_data=undef)
       •   $sort_func (scalar)

       •   $user_data (scalar)

   boolean = $sortable->has_default_sort_func
   $sortable->sort_column_changed
   (sort_column_id, order) = $sortable->get_sort_column_id
       Returns sort_column_id, an integer and order, a Gtk2::SortType.

   $sortable->set_sort_column_id ($sort_column_id, $order)
       •   $sort_column_id (integer)

       •   $order (Gtk2::SortType)

   $sortable->set_sort_func ($sort_column_id, $sort_func, $user_data=undef)
       •   $sort_column_id (integer)

       •   $sort_func (scalar)

       •   $user_data (scalar)

IMPLEMENTING THE GtkTreeSortable INTERACE

       If you want your custom tree model to be sortable, you need to implement the
       GtkTreeSortable interface.  Just like with other interfaces, this boils down to announcing
       that your subclass implements the interface and providing a few virtual methods.  The
       former is achieved by adding "Gtk2::TreeSortable" to the "interfaces" key.  For example:

         package MyModel;
         use Gtk2;
         use Glib::Object::Subclass
             Glib::Object::,
             interfaces => [ Gtk2::TreeModel::, Gtk2::TreeSortable:: ],
             ;

       The virtual methods you need to implement are listed below.

   VIRTUAL METHODS
       These virtual methods are called by perl when gtk+ attempts to modify the sorting behavior
       of your model.  Implement them in your model's package.  Note that we don't provide a
       wrapper for sort_column_changed because there is a signal for it, which means you can use
       the normal signal overriding mechanism documented in Glib::Object::Subclass.

       (is_not_special, id, order) = GET_SORT_COLUMN_ID ($model)
           Returns a boolean indicating whether the column is a special or normal one, its id and
           its sorting order.

       SET_SORT_COLUMN_ID ($list, $id, $order)
           Sets the sort column to the one specified by $id and the sorting order to $order.

       SET_SORT_FUNC ($list, $id, $func, $data)
           Sets the function that is to be used for sorting the column $id.

       SET_DEFAULT_SORT_FUNC ($list, $func, $data)
           Sets the function that is to be used for sorting columns that don't have a sorting
           function attached to them.

           The $func and $data arguments passed to these two methods should be treated as
           blackboxes.  They are generic containers for some callback that is to be invoked
           whenever you want to compare two tree iters.  When you call them, make sure to always
           pass $data.  For example:

             $retval = $func->($list, $a, $b, $data);

       bool = HAS_DEFAULT_SORT_FUNC ($list)
           Returns a bool indicating whether $list has a default sorting function.

SIGNALS

       sort-column-changed (Gtk2::TreeSortable)

ENUMS AND FLAGS

   enum Gtk2::SortType
       •   'ascending' / 'GTK_SORT_ASCENDING'

       •   'descending' / 'GTK_SORT_DESCENDING'

SEE ALSO

       Gtk2, Glib::Interface

COPYRIGHT

       Copyright (C) 2003-2011 by the gtk2-perl team.

       This software is licensed under the LGPL.  See Gtk2 for a full notice.