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########################################################################
##
## Copyright (C) 2010-2025 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 {} {} rmappdata (@var{h}, @var{name})
## @deftypefnx {} {} rmappdata (@var{h}, @var{name1}, @var{name2}, @dots{})
## Delete the application data @var{name} from the graphics object with handle
## @var{h}.
##
## @var{h} may also be a vector of graphics handles. Multiple application data
## names may be supplied to delete several properties at once.
##
## @seealso{setappdata, getappdata, isappdata}
## @end deftypefn
function rmappdata (h, varargin)
if (nargin < 2)
print_usage ();
endif
h = h(:).';
if (! all (ishghandle (h)))
error ("rmappdata: H must be a scalar or vector of graphic handles");
elseif (! iscellstr (varargin))
error ("rmappdata: NAME must be a string");
endif
for hg = h
if (isprop (hg, "__appdata__"))
appdata = get (hg, "__appdata__");
vld = isfield (appdata, varargin);
if (! all (vld))
## FIXME: Should we bother to error out? Or just silently continue?
missing = varargin{find (! vld, 1)};
error ("rmappdata: appdata '%s' is not present", missing);
endif
appdata = rmfield (appdata, varargin);
set (hg, "__appdata__", appdata);
endif
endfor
endfunction
%!test
%! setappdata (0, "%hello%", "world");
%! rmappdata (0, "%hello%");
%! assert (isappdata (0, "%hello%"), false);
%!test
%! setappdata (0, "%data1%", ones (3));
%! setappdata (0, "%data2%", {"hello", "world"});
%! rmappdata (0, "%data1%", "%data2%");
%! assert (isappdata (0, "%data1%"), false);
%! assert (isappdata (0, "%data2%"), false);
## Test input validation
%!error <Invalid call> rmappdata ()
%!error <Invalid call> rmappdata (1)
%!error <H must be a scalar .* graphic handle> rmappdata (-1, "hello")
%!error <NAME must be a string> rmappdata (0, 1)
%!error <appdata 'foobar' is not present> rmappdata (0, "foobar")
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