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1 ## Copyright (C) 1996, 1997 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 2, or (at your option) |
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8 ## 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, write to the Free |
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17 ## Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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18 ## 02110-1301, USA. |
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19 |
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20 ## -*- texinfo -*- |
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21 ## @deftypefn {Function File} {} grid (@var{arg}) |
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22 ## @deftypefnx {Function File} {} grid ("minor", @var{arg2}) |
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23 ## Force the display of a grid on the plot. |
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24 ## The argument may be either @code{"on"} or @code{"off"}. If it is |
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25 ## omitted, the current grid state is toggled. |
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26 ## |
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27 ## If @var{arg} is @code{"minor"} then the minor grid is toggled. When |
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28 ## using a minor grid a second argument @var{arg2} is allowed, which can |
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29 ## be either @code{"on"} or @code{"off"} to explicitly set the state of |
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30 ## the minor grid. |
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31 ## @seealso{plot} |
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32 ## @end deftypefn |
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33 |
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34 ## Author: jwe |
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35 |
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36 ## PKG_ADD: mark_as_command grid |
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37 |
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38 function grid (x, y) |
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39 |
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40 persistent grid_on = false; |
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41 persistent minor_on = false; |
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42 |
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43 nargs = nargin; |
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44 |
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45 if (nargs == 2) |
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46 if (ishandle (x)) |
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47 ax = x; |
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48 x = y; |
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49 nargs--; |
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50 if (! strcmp (get (ax, "type"), "axes")) |
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51 error ("grid: expecting first argument to be an axes object"); |
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52 endif |
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53 else |
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54 print_usage (); |
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55 endif |
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56 else |
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57 ax = gca (); |
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58 endif |
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59 |
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60 if (nargs == 0) |
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61 grid_on = ! grid_on; |
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62 elseif (nargs == 1) |
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63 if (ischar (x)) |
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64 if (strcmp ("off", x)) |
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65 grid_on = false; |
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66 elseif (strcmp ("on", x)) |
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67 grid_on = true; |
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68 elseif (strcmp ("minor", x)) |
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69 minor_on = ! minor_on; |
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70 if (minor_on) |
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71 grid_on = true; |
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72 endif |
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73 else |
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74 print_usage (); |
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75 endif |
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76 else |
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77 error ("grid: argument must be a string"); |
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78 endif |
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79 else |
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80 print_usage (); |
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81 endif |
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82 |
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83 if (grid_on) |
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84 set (ax, "xgrid", "on", "ygrid", "on", "zgrid", "on"); |
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85 if (minor_on) |
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86 set (ax, "xminorgrid", "on", "yminorgrid", "on", "zminorgrid", "on"); |
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87 else |
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88 set (ax, "xminorgrid", "off", "yminorgrid", "off", "zminorgrid", "off"); |
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89 endif |
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90 else |
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91 set (ax, "xgrid", "off", "ygrid", "off", "zgrid", "off"); |
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92 set (ax, "xminorgrid", "off", "yminorgrid", "off", "zminorgrid", "off"); |
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93 endif |
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94 |
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95 endfunction |
