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## Copyright (C) 2018 John Donoghue <john.donoghue@ieee.org>
##
## This program 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.
##
## This program 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.
## -*- texinfo -*-
## @deftypefn {} {@var{val} = } subsref (@var{dev}, @var{sub})
## subref for rotaryEncoder
##
## @seealso{rotaryEncoder}
## @end deftypefn
function val = subsref (p, s)
if isempty(s)
error ("rotaryEncoder.subsref missing index");
endif
if s(1).type == "."
fld = tolower(s(1).subs);
switch (fld)
case "pins"
val = {};
for i = 1:numel(p.pins)
val{end+1} = p.pins{i}.name;
endfor
case "parent"
val = p.parent;
case "ppr"
val = p.ppr;
otherwise
error ("rotaryEncoder.subsref invalid property '%s'", fld);
endswitch
else
error("unimplemented rotaryEncoder.subsref type");
endif
if (numel (s) > 1)
val = subsref (val, s(2:end));
endif
endfunction
%!test
%! ar = arduino();
%! r = rotaryEncoder (ar, "d2", "d3", 100);
%! assert (isarduino(r.parent))
%! assert (ar.port, r.parent.port)
%! assert (r.ppr, 100)
%! assert (numel(r.pins) == 2)
%! fail ("r.invalid")
%! delete(r)
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