1 ## Copyright (C) 2007-2012 John W. Eaton
3 ## This file is part of Octave.
5 ## Octave is free software; you can redistribute it and/or modify it
6 ## under the terms of the GNU General Public License as published by
7 ## the Free Software Foundation; either version 3 of the License, or (at
8 ## your option) any later version.
10 ## Octave is distributed in the hope that it will be useful, but
11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 ## General Public License for more details.
15 ## You should have received a copy of the GNU General Public License
16 ## along with Octave; see the file COPYING. If not, see
17 ## <http://www.gnu.org/licenses/>.
20 ## @deftypefn {Function File} {@var{rgb} =} __next_line_color__ (@var{reset})
21 ## Undocumented internal function.
24 ## Return the next line color in the rotation.
28 function rgb = __next_line_color__ (reset)
30 persistent color_rotation;
31 persistent num_colors;
32 persistent color_index;
36 if (reset || isempty (color_rotation))
37 color_rotation = get (gca (), "colororder");
38 num_colors = rows (color_rotation);
41 elseif (! isempty (color_rotation))
42 rgb = color_rotation(color_index,:);
43 if (++color_index > num_colors)
45 __next_line_style__ ("incr");
48 error ("__next_line_color__: color_rotation not initialized");