New menu.m version

[stefan.pofahl]

Dear Maintainers,

I simply don't know, how to call the function
menu with a 2D string array as second argument,
so I wrote my own one.

Best regards,

Stefan Pofahl


*******

## Copyright (C) 1996, 1997 John W. Eaton
## Copyright (C) 2006 Stefan Pofahl
##
## This file is part of Octave.
##
## Octave is free software; you can redistribute it and/or modify it
## under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 2, or (at your option)
## any later version.
##
## Octave is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
## General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Octave; see the file COPYING.  If not, write to the Free
## Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
## 02110-1301, USA.

## -*- texinfo -*-
## @deftypefn {Function File} {} menu (@var{title}, @var{opt1}, @dots{})
## Print a title string followed by a series of options.  Each option will
## be printed along with a number.  The return value is the number of the
## option selected by the user.  This function is useful for interactive
## programs.  There is no limit to the number of options that may be passed
## in, but it may be confusing to present more than will fit easily on one
## screen.
## @end deftypefn
##
## @seealso{disp, printf, and input}

## Author: jwe
## menu.m changed by: address@hidden (Juni 2006) 
## (know you can have a 2D string array as argument)

function num = mylib_menu (t, varargin)

  if (nargin < 2)
    usage ("mylib_menu (title, opt1, ...)");
  endif

  ## Force pending output to appear before the mylib_menu.

  fflush (stdout);

  ## Don't send the mylib_menu through the pager since doing that can cause
  ## major confusion.

  save_page_screen_output = page_screen_output;

  unwind_protect

    page_screen_output = 0;

    if (! isempty (t))
      disp (t);
      printf ("\n");
    endif
    # varargin
    # varargin{1}
    # size_of_cell_inhould= size(varargin{1})
    # size_of_cell_element= size(iscell(varargin{1}))
    # is_cell_inside= iscell(varargin{1})
    # is_cell= iscell(varargin)
    # is_cellstring= iscellstr(varargin)
    # cell(varargin,1, 1)
    if size(varargin{1})(1)==1
      nopt = nargin - 1;
    else
      nopt = size(varargin{1})(1);
    endif

    while (1)
      for i = 1:nopt
        printf ("  [%2d] ", i);
        if size(varargin{1})(1)==1
          disp (varargin{i});
        else
          disp (varargin{1}(i,:));
        endif
        
      endfor
      printf ("\n");
      s = input ("pick a number, any number: ", "s");
      eval (sprintf ("num = %s;", s), "num = [];");
      if (! isscalar (num) || num < 1 || num > nopt)
        printf ("\nerror: input invalid or out of range\n\n");
      else
        break;
      endif
    endwhile

  unwind_protect_cleanup

    page_screen_output = save_page_screen_output;

  end_unwind_protect

endfunction