update packages

[CreaPhase.git] / octave_packages / m / plot / private / __next_line_style__.m

diff --git a/octave_packages/m/plot/private/__next_line_style__.m b/octave_packages/m/plot/private/__next_line_style__.m
new file mode 100644 (file)
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+++ b/octave_packages/m/plot/private/__next_line_style__.m
@@ -0,0 +1,61 @@
+## Copyright (C) 2010-2012 David Bateman
+##
+## 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 3 of the License, 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, see
+## <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn {Function File} {@var{style} =} __next_line_style__ (@var{reset})
+## Undocumented internal function.
+## @end deftypefn
+
+## Return the next line style in the rotation.
+
+
+function [linestyle, marker] = __next_line_style__ (reset)
+
+  persistent style_rotation;
+  persistent num_styles;
+  persistent style_index;
+
+  if (nargin < 2)
+    if (nargin == 1)
+      if (ischar (reset) && strncmp (reset, "incr", 4))
+        if (isempty (style_rotation))
+          error ("__next_line_style__: style_rotation not initialized");
+        elseif (++style_index > num_styles)
+          style_index = 1;
+        endif
+      elseif (reset || isempty (style_rotation))
+        style_rotation = get (gca (), "linestyleorder");
+        if (ischar (style_rotation))
+          style_rotation = strsplit (style_rotation, "|");
+        endif
+        num_styles = length (style_rotation);
+        style_index = 1;
+      endif
+    elseif (! isempty (style_rotation))
+      options = __pltopt__ ("__next_line_style__",
+                            style_rotation (style_index));
+      linestyle = options.linestyle;
+      marker = options.marker;
+    else
+      error ("__next_line_style__: style_rotation not initialized");
+    endif
+  else
+    print_usage ();
+  endif
+
+endfunction