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1 ## Copyright (C) 2007 Michael Goffioul |
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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} {} hidden (@var{mode}) |
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21 ## @deftypefnx {Function File} {} hidden () |
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22 ## Manipulation the mesh hidden line removal. Called with no argument |
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23 ## the hidden line removal is toggled. The argument @var{mode} can be either |
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24 ## 'on' or 'off' and the set of the hidden line removal is set accordingly. |
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25 ## @seealso{mesh, meshc, surf} |
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26 ## @end deftypefn |
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27 |
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28 ## PKG_ADD: mark_as_command hidden |
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29 |
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30 function retval = hidden (mode) |
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31 |
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32 if (nargin == 0) |
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33 mode = "swap"; |
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34 elseif (nargin == 1); |
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35 if (ischar (mode)) |
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36 mode = tolower (mode); |
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37 if (! strcmp (mode, "on") && ! strcmp (mode, "off")) |
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38 error ("hidden: mode expected to be 'on' or 'off'"); |
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39 endif |
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40 else |
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41 error ("hidden: expecting mode to be a string"); |
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42 endif |
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43 else |
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44 print_usage (); |
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45 endif |
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46 |
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47 for h = get (gca (), "children"); |
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48 htype = lower (get (h, "type")); |
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49 if (strcmp (htype, "surface")) |
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50 fc = get (h, "facecolor"); |
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51 if ((! ischar (fc) && is_white (fc)) |
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52 || (ischar (fc) && strcmp (fc, "none"))) |
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53 switch (mode) |
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54 case "on" |
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55 set (h, "facecolor", "w"); |
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56 case "off" |
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57 set (h, "facecolor", "none"); |
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58 case "swap" |
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59 if (ischar (fc)) |
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60 set (h, "facecolor", "w"); |
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61 mode = "on"; |
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62 else |
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63 set (h, "facecolor", "none"); |
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64 mode = "off"; |
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65 endif |
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66 endswitch |
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67 endif |
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68 endif |
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69 endfor |
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70 |
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71 if (nargout > 0) |
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72 retval = mode; |
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73 endif |
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74 |
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75 endfunction |
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76 |
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77 function retval = is_white (color) |
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78 retval = all (color == 1); |
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79 endfunction |
