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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 {} {} setappdata (@var{h}, @var{name}, @var{value})
## @deftypefnx {} {} setappdata (@var{h}, @var{name1}, @var{value1}, @var{name2}, @var{value2}, @dots{})
## @deftypefnx {} {} setappdata (@var{h}, @{@var{name1}, @var{name2}, @dots{}@}, @{@var{value1}, @var{value2}, @dots{}@})
## Set the application data @var{name} to @var{value} for the graphics object
## with handle @var{h}.
##
## @var{h} may also be a vector of graphics handles. If the application data
## with the specified @var{name} does not exist, it is created.
##
## Multiple @var{name}/@var{value} pairs can be specified. Alternatively, a
## cell array of @var{names} and a corresponding cell array of @var{values} can
## be specified. For details on obtaining a list of valid application data
## properties, @pxref{XREFgetappdata,,@code{getappdata}}.
##
## @seealso{getappdata, isappdata, rmappdata, guidata, get, set, getpref,
## setpref}
## @end deftypefn
function setappdata (h, varargin)
if (nargin < 3)
print_usage ();
endif
h = h(:).';
if (! all (ishghandle (h)))
error ("setappdata: H must be a scalar or vector of graphic handles");
elseif (mod (numel (varargin), 2) != 0)
error ("setappdata: NAME/VALUE arguments must occur in pairs");
endif
if (iscellstr (varargin{1}))
if (nargin != 3)
error ("setappdata: only 3 arguments possible when NAME is a cellstr");
elseif (! iscell (varargin{2}))
varargin{2} = varargin(2); # convert to cell
endif
names = varargin{1};
values = varargin{2};
n_names = numel (names);
n_value = numel (values);
if (n_value == 1 && n_names > 1)
values = repmat (values, [1, n_names]);
elseif (n_names != n_value)
error ("setappdata: number of NAME and VALUE arguments must match");
endif
varargin = cell (1, 2*numel (names));
varargin(1:2:end) = names;
varargin(2:2:end) = values;
elseif (! all (cellfun ("isclass", varargin(1:2:end), "char")))
error ("setappdata: NAME must be a string or cellstr");
endif
for hg = h
appdata = get (hg, "__appdata__");
## Slow, but not likely to be that many elements in loop
for narg = 1:2:numel (varargin)
appdata.(varargin{narg}) = varargin{narg+1};
endfor
set (hg, "__appdata__", appdata);
endfor
endfunction
%!test
%! unwind_protect
%! setappdata (0, "%hello%", "world");
%! assert (isappdata (0, "%hello%"), true);
%! assert (getappdata (0, "%hello%"), "world");
%! unwind_protect_cleanup
%! rmappdata (0, "%hello%");
%! end_unwind_protect
%!test
%! unwind_protect
%! setappdata (0, "%data1%", ones (3), "%data2%", "hello world");
%! assert (getappdata (0, "%data1%"), ones (3));
%! assert (getappdata (0, "%data2%"), "hello world");
%! setappdata (0, "%data1%", zeros (3));
%! assert (getappdata (0, "%data1%"), zeros (3));
%! unwind_protect_cleanup
%! rmappdata (0, "%data1%", "%data2%");
%! end_unwind_protect
%!test
%! unwind_protect
%! setappdata (0, {"%data1%", "%data2%"}, {ones(3), "hello world"});
%! assert (getappdata (0, "%data1%"), ones (3));
%! assert (getappdata (0, "%data2%"), "hello world");
%! setappdata (0, "%data1%", zeros (3));
%! assert (getappdata (0, "%data1%"), zeros (3));
%! rmappdata (0, "%data1%", "%data2%");
%! setappdata (0, {"%data1%", "%data2%"}, pi);
%! assert (getappdata (0, "%data1%"), pi);
%! assert (getappdata (0, "%data2%"), pi);
%! unwind_protect_cleanup
%! rmappdata (0, "%data1%", "%data2%");
%! end_unwind_protect
## Test input validation
%!error <Invalid call> setappdata ()
%!error <Invalid call> setappdata (0)
%!error <Invalid call> setappdata (0, "name")
%!error <H must be a scalar .* graphic handle> setappdata (-1, "foo", "bar")
%!error <NAME/VALUE arguments must occur in pairs> setappdata (0, "1", 2, "3")
%!error <only 3 arguments possible> setappdata (0, {"1"}, 2, "3", 4)
%!error <number of NAME and VALUE arguments must match>
%! setappdata (0, {"1", "2"}, {2, 3, 4})
%!error <NAME must be a string> setappdata (0, 1, 2)
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