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########################################################################
##
## Copyright (C) 2005-2024 The Octave Project Developers
##
## See the file COPYRIGHT.md in the top-level directory of this
## distribution or <https://octave.org/copyright/>.
##
## 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
## <https://www.gnu.org/licenses/>.
##
########################################################################
## -*- texinfo -*-
## @deftypefn {} {@var{tf} =} isfigure (@var{h})
## Return true if @var{h} is a figure graphics handle and false otherwise.
##
## If @var{h} is a matrix then return a logical array which is true where the
## elements of @var{h} are figure graphics handles and false where they are
## not.
## @seealso{isaxes, ishghandle, isgraphics}
## @end deftypefn
function tf = isfigure (h)
if (nargin < 1)
print_usage ();
endif
tf = ishghandle (h);
if (any (tf))
tf(tf) = strcmp (get (h(tf), "type"), "figure");
endif
endfunction
%!test
%! hf = figure ("visible", "off");
%! unwind_protect
%! assert (isfigure (hf));
%! assert (! isfigure (-hf));
%! unwind_protect_cleanup
%! close (hf);
%! end_unwind_protect
%!test
%! hf = figure ("visible", "off");
%! unwind_protect
%! assert (isfigure ([hf NaN]), [true false]);
%! unwind_protect_cleanup
%! close (hf);
%! end_unwind_protect
%!error <Invalid call> isfigure ()
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