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