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annotate scripts/miscellaneous/menu.m @ 17535:c12c688a35ed default tip lyh

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Fix warnings
author LYH <lyh.kernel@gmail.com>
date Fri, 27 Sep 2013 17:43:27 +0800
parents 86854d032a37
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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72c96de7a403 maint: update copyright notices for 2012
John W. Eaton <jwe@octave.org>
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1 ## Copyright (C) 1993-2012 John W. Eaton
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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} {} menu (@var{title}, @var{opt1}, @dots{})
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21 ## Print a title string followed by a series of options. Each option will
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22 ## be printed along with a number. The return value is the number of the
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23 ## option selected by the user. This function is useful for interactive
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24 ## programs. There is no limit to the number of options that may be passed
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25 ## in, but it may be confusing to present more than will fit easily on one
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26 ## screen.
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27 ## @seealso{disp, printf, input}
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28 ## @end deftypefn
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30 ## Author: jwe
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31
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32 function num = menu (title, varargin)
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34 if (nargin < 2)
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35 print_usage ();
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36 endif
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37
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38 ## Force pending output to appear before the menu.
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39
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40 fflush (stdout);
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41
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42 ## Don't send the menu through the pager since doing that can cause
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43 ## major confusion.
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44
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45 page_screen_output (0, "local");
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46
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47 ## Process Supplied Options
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48 if (nargin == 2)
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49 ## List in a cell array
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50 if (iscell (varargin{1}))
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51 varargin = varargin{1};
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52 nopt = length (varargin);
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53 for i = 1:nopt
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54 while (iscell (varargin{i}))
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55 varargin{i} = varargin{i}{1};
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56 endwhile
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57 endfor
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58 else
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59 nopt = nargin - 1;
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60 endif
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61 else
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62 ## List with random elements in it - pick the first always
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63 for i = 1:nargin - 1
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64 if (iscell (varargin{i}))
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65 while (iscell (varargin{i}))
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66 varargin{i} = varargin{i}{1};
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67 endwhile
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68 else
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69 if (! ischar (varargin{i}))
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70 varargin{i} = varargin{i}(1);
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71 endif
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72 endif
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73 endfor
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74 nopt = length (varargin);
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75 endif
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76
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77 if (! isempty (title))
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78 disp (title);
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79 printf ("\n");
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80 endif
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81
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82 while (1)
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83 for i = 1:nopt
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84 printf (" [%2d] ", i);
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85 disp (varargin{i});
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86 endfor
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87 printf ("\n");
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88 s = input ("pick a number, any number: ", "s");
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89 num = sscanf (s, "%d");
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90 if (! isscalar (num) || num < 1 || num > nopt)
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91 printf ("\nerror: input invalid or out of range\n\n");
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92 else
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93 break;
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94 endif
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95 endwhile
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96
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97 endfunction
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98