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annotate scripts/plot/isprop.m @ 14138:72c96de7a403 stable

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maint: update copyright notices for 2012
author John W. Eaton <jwe@octave.org>
date Mon, 02 Jan 2012 14:25:41 -0500
parents 7715aca4bce1
children f3d52523cde1
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14138
72c96de7a403 maint: update copyright notices for 2012
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1 ## Copyright (C) 2010-2012 Ben Abbott
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2 ##
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by
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7 ## the Free Software Foundation; either version 3 of the License, or (at
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8 ## your option) any later version.
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9 ##
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10 ## Octave is distributed in the hope that it will be useful, but
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 ## General Public License for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, see
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17 ## <http://www.gnu.org/licenses/>.
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18
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19 ## -*- texinfo -*-
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20 ## @deftypefn {Function File} {@var{res} =} isprop (@var{h}, @var{prop})
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21 ## Return true if @var{prop} is a property of the object with handle @var{h}.
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22 ## @seealso{get, set}
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23 ## @end deftypefn
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24
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25 ## Author: Ben Abbott <bpabbott@mac.com>
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26
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27 function res = isprop (h, prop)
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28 ## Check input
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29 if (nargin < 1 || nargin > 2)
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30 print_usage ();
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31 endif
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32
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33 if (! all (ishandle (h)))
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34 error ("isprop: first input argument must be a handle");
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35 elseif (! ischar (prop))
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36 error ("isprop: second input argument must be string");
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37 endif
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38
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39 res = false (size (h));
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40 for n = 1:numel(res)
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41 res(n) = true;
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42 try
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43 v = get (h(n), prop);
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44 catch
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45 res(n) = false;
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46 end_try_catch
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47 endfor
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48 endfunction
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49
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50 %!assert (isprop (0, "foobar"), false)
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51
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52 %!assert (isprop (0, "screenpixelsperinch"), true)
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53
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54 %!assert (isprop (zeros (2, 3), "visible"), true (2, 3))
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