annotate scripts/plot/gcbo.m @ 14688:42edbe6f6a8d stable

Fix bad two-arg call of randperm (bug #36535) * rand.cc (Frandperm): Rewrite algorithm for short_shuffle. Add another test.
author Jordi Gutiérrez Hermoso <jordigh@octave.org>
date Fri, 25 May 2012 11:24:02 -0400
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72c96de7a403 maint: update copyright notices for 2012
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1 ## Copyright (C) 2008-2012 Michael Goffioul
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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{h} =} gcbo ()
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21 ## @deftypefnx {Function File} {[@var{h}, @var{fig}] =} gcbo ()
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22 ## Return a handle to the object whose callback is currently
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23 ## executing. If no callback is executing, this function returns the
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24 ## empty matrix. This handle is obtained from the root object property
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25 ## "CallbackObject".
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26 ##
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27 ## Additionally return the handle of the figure containing the
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28 ## object whose callback is currently executing. If no callback is
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29 ## executing, the second output is also set to the empty matrix.
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30 ##
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31 ##@seealso{gcf, gca, gcbf}
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32 ##@end deftypefn
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33
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34 function [h, fig] = gcbo ()
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35
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36 h = get (0, "callbackobject");
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37 fig = [];
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38
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39 if (! isempty (h) && nargout > 1)
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40 fig = ancestor (h, "figure");
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41 endif
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42
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43 endfunction
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44
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45 %!test
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46 %! assert (isempty (gcbo ));