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update copyright notices
author John W. Eaton <jwe@octave.org>
date Fri, 14 Jan 2011 05:47:45 -0500
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1 ## Copyright (C) 2008-2011 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} {} backend (@var{name})
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21 ## @deftypefnx {Function File} {} backend (@var{hlist}, @var{name})
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22 ## Change the default graphics backend to @var{name}. If the backend is
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23 ## not already loaded, it is first initialized (initialization is done
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24 ## through the execution of @code{__init_@var{name}__}).
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25 ##
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26 ## When called with a list of figure handles, @var{hlist}, the backend is
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27 ## changed only for the listed figures.
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28 ## @seealso{available_backends}
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29 ## @end deftypefn
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30
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31 function backend (varargin)
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32
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33 name = "";
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34 hlist = [];
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35
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36 if (nargin == 1)
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37 if (ischar (varargin{1}))
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38 name = varargin{1};
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39 else
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40 error ("backend: invalid backend NAME");
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41 endif
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42 elseif (nargin == 2)
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43 if (isnumeric (varargin{1}) && ischar (varargin{2}))
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44 hlist = varargin{1};
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45 name = varargin{2};
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46 elseif (ischar (varargin{2}))
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47 error ("backend: invalid handle list");
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48 else
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49 error ("backend: invalid backend NAME");
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50 endif
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51 else
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52 print_usage ();
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53 endif
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54
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55 if (! any (strcmp (available_backends (), name)))
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56 feval (["__init_", name, "__"]);
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57 if (! any (strcmp (available_backends (), name)))
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58 error ("backend: backend was not correctly registered");
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59 endif
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60 endif
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61
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62 if (isempty (hlist))
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63 set (0, "defaultfigure__backend__", name);
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64 else
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65 for h = hlist(:)'
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66 set (h, "__backend__", name);
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67 endfor
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68 endif
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69
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70 endfunction