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## Copyright (C) 2008-2013 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} {} ishghandle (@var{h})
## Return true if @var{h} is a graphics handle and false otherwise.
##
## This function is equivalent to @code{ishandle} and is provided for
## compatibility with @sc{matlab}.
## @seealso{ishandle}
## @end deftypefn
function retval = ishghandle (h)
## This function is just included for compatibility as Octave has
## no simulink equivalent.
retval = ishandle (h);
endfunction
%!test
%! hf = figure ("visible", "off");
%! unwind_protect
%! assert (ishghandle (hf));
%! assert (! ishghandle (-hf));
%! l = line;
%! ax = gca;
%! assert (ishghandle (ax));
%! assert (! ishghandle (-ax));
%! assert (ishghandle (l));
%! assert (! ishghandle (-l));
%! p = patch;
%! assert (ishghandle (p));
%! assert (! ishghandle (-p));
%! s = surface;
%! assert (ishghandle (s));
%! assert (! ishghandle (-s));
%! t = text;
%! assert (ishghandle (t));
%! assert (! ishghandle (-t));
%! i = image ([1]);
%! assert (ishghandle (i));
%! assert (! ishghandle (-i));
%! hg = hggroup;
%! assert (ishghandle (hg));
%! assert (! ishghandle (-hg));
%! unwind_protect_cleanup
%! close (hf);
%! end_unwind_protect
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