--- /dev/null
+## Copyright (C) 2010-2012 David Bateman
+##
+## This file is part of Octave.
+##
+## Octave is free software; you can redistribute it and/or modify it
+## under the terms of the GNU General Public License as published by
+## the Free Software Foundation; either version 3 of the License, or (at
+## your option) any later version.
+##
+## Octave is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+## General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with Octave; see the file COPYING. If not, see
+## <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn {Function File} {[@var{hplots}, @var{strings}]} = __getlegenddata__ (@var{h})
+## Undocumented internal function.
+## @end deftypefn
+
+function [hplots, text_strings] = __getlegenddata__ (hlegend)
+ hplots = [];
+ text_strings = {};
+ ca = getfield (get (hlegend, "userdata"), "handle");
+ kids = [];
+ for i = 1:numel (ca)
+ kids = [kids; get(ca(i), "children")];
+ endfor
+
+ for i = numel (kids):-1:1
+ typ = get (kids(i), "type");
+ if (strcmp (typ, "line") || strcmp (typ, "surface")
+ || strcmp (typ, "patch") || strcmp (typ, "hggroup"))
+
+ if (strcmp (typ, "hggroup"))
+ hgkids = get (kids(i), "children");
+ for j = 1 : length (hgkids)
+ hgobj = get (hgkids (j));
+ if (isfield (hgobj, "displayname") && ! isempty (hgobj.displayname))
+ hplots = [hplots, hgkids(j)];
+ text_strings = {text_strings{:}, hgobj.displayname};
+ break;
+ endif
+ endfor
+ else
+ if (! isempty (get (kids (i), "displayname")))
+ hplots = [hplots, kids(i)];
+ text_strings = {text_strings{:}, get(kids (i), "displayname")};
+ endif
+ endif
+
+ endif
+ endfor
+
+endfunction