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fix copyright notices
author John W. Eaton <jwe@octave.org>
date Sun, 17 Oct 2010 23:43:42 -0400
parents be55736a0783
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1 ## Copyright (C) 2008, 2009 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} {} cla ()
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21 ## @deftypefnx {Function File} {} cla ("reset")
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22 ## @deftypefnx {Function File} {} cla (@var{hax})
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23 ## @deftypefnx {Function File} {} cla (@var{hax}, "reset")
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24 ## Delete the children of the current axes with visible handles.
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25 ## If @var{hax} is specified and is an axes object handle, operate on it
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26 ## instead of the current axes. If the optional argument @code{"reset"}
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27 ## is specified, also delete the children with hidden handles.
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28 ## @seealso{clf}
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29 ## @end deftypefn
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30
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31 ## Author: Ben Abbott <bpabbott@mac.com>
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32 ## Created: 2008-10-03
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33
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34 function cla (varargin)
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35
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36 if (nargin > 2)
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37 print_usage ();
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38 elseif (nargin > 1)
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39 if (ishandle (varargin{1})
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40 && strcmp (get (varargin{1}, "type"), "axes")
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41 && ischar (varargin{2}) && strcmpi (varargin{2}, "reset"))
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42 oldhax = gca;
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43 hax = varargin{1};
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44 do_reset = true;
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45 else
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46 print_usage ();
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47 endif
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48 elseif (nargin == 1)
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49 if (ishandle (varargin{1})
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50 && strcmp (get (varargin{1}, "type"), "axes"))
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51 oldhax = gca;
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52 hax = varargin{1};
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53 do_reset = false;
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54 elseif (ischar (varargin{1}) && strcmpi (varargin{1}, "reset"))
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55 hax = gca;
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56 oldhax = hax;
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57 do_reset = true;
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58 else
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59 print_usage ();
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60 endif
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61 else
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62 hax = gca;
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63 oldhax = hax;
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64 do_reset = false;
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65 endif
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66
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67 hc = get (hax, "children");
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68
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69 if (! do_reset && ! isempty (hc))
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70 hc = findobj (hc, "flat", "visible", "on");
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71 hc = setdiff (hc, hax);
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72 endif
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73
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74 if (! isempty (hc))
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75 ## Delete the children of the axis.
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76 delete (hc);
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77 endif
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78
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79 ## FIXME: The defaults should be "reset()" below, but so far there is
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80 ## no method to determine the defaults, much less return an object's
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81 ## properties to their default values. Instead make a close
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82 ## approximation.
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83
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84 axes (hax);
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85 axis auto
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86
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87 ## Set the current axis back to where it was upon entry.
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88 axes (oldhax);
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89
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90 endfunction
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91
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92 %!test
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93 %! hf = figure (1, "visible", "off");
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94 %! unwind_protect
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95 %! clf
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96 %! plot (1:10)
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97 %! cla ()
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98 %! kids = get (gca, "children");
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99 %! cla ()
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100 %! unwind_protect_cleanup
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101 %! close (hf)
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102 %! end_unwind_protect
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103 %! assert (numel (kids), 0)