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## Copyright (C) 2008-2013 Bill Denney
##
## 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{h} =} allchild (@var{handles})
## Find all children, including hidden children, of a graphics object.
##
## This function is similar to @code{get (h, "children")}, but also returns
## hidden objects (HandleVisibility = @qcode{"off"}). If @var{handles} is a
## scalar, @var{h} will be a vector. Otherwise, @var{h} will be a cell
## matrix of the same size as @var{handles} and each cell will contain a
## vector of handles.
## @seealso{findall, findobj, get, set}
## @end deftypefn
## Author: Bill Denney <bill@denney.ws>
function h = allchild (handles)
if (nargin != 1)
print_usage ();
endif
shh = get (0, "showhiddenhandles");
unwind_protect
set (0, "showhiddenhandles", "on");
h = get (handles, "children");
unwind_protect_cleanup
set (0, "showhiddenhandles", shh);
end_unwind_protect
endfunction
%!testif HAVE_FLTK
%! toolkit = graphics_toolkit ("fltk");
%! hf = figure ("visible", "off");
%! unwind_protect
%! l = line;
%! kids = allchild (hf);
%! assert (get (kids, "type"), {"axes"; "uimenu"; "uimenu"});
%! unwind_protect_cleanup
%! close (hf);
%! graphics_toolkit (toolkit);
%! end_unwind_protect
%!error allchild ()
%!error allchild (1, 2)
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