--- /dev/null
+## 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} {} whitebg ()
+## @deftypefnx {Function File} {} whitebg (@var{color})
+## @deftypefnx {Function File} {} whitebg ("none")
+## @deftypefnx {Function File} {} whitebg (@var{fig})
+## @deftypefnx {Function File} {} whitebg (@var{fig}, @var{color})
+## @deftypefnx {Function File} {} whitebg (@var{fig}, "none")
+## Invert the colors in the current color scheme. The root properties are
+## also inverted such that all subsequent plot use the new color scheme.
+##
+## If defined, @var{fig} is the handle to the figure to be inverted. In
+## this case only the specified figure has its color properties changed.
+##
+## If the optional argument @var{color} is present then the background color
+## is set to @var{color} rather than inverted. @var{color} may be a string
+## representing one of the eight known colors or an RGB triplet. The special
+## string argument "none" restores the plot to the default colors.
+## @seealso{reset}
+## @end deftypefn
+
+function whitebg (varargin)
+ h = 0;
+ color = NaN;
+
+ if (nargin > 0 && nargin < 3)
+ if (ishandle (varargin{1}))
+ h = varargin{1};
+ if (nargin == 2)
+ color = varargin{2};
+ endif
+ elseif (nargin == 1)
+ color = varargin{1};
+ else
+ print_usage ();
+ endif
+ elseif (nargin != 0)
+ print_usage ();
+ endif
+
+ typ = get (h, "type");
+
+ if (strcmp (typ, "root"))
+ isroot = true;
+ fig = gcf ();
+ elseif (strcmp (typ, "figure"))
+ isroot = false;
+ fig = h;
+ else
+ error ("expecting a figure handle");
+ endif
+
+ axes = findall (fig, "type", "axes");
+ if (isnan (color))
+ ## Root figure. Set the default axes and figure properties so that
+ ## subsequent plots have the new color scheme
+ if (isroot)
+ fac = get (0, "factory");
+ fields = fieldnames (fac);
+ fieldindex = intersect (find (!cellfun ("isempty", regexp(fields, 'color'))), union (find (!cellfun ("isempty", regexp(fields, 'factoryaxes.*'))), find (!cellfun ("isempty", regexp(fields, 'factoryfigure.*')))));
+
+ ## Check whether the factory value has been replaced
+ for nf = 1 : numel (fieldindex);
+ defaultfield = strrep (fields {fieldindex (nf)}, "factory", "default");
+ try
+ defaultvalue = 1 - get (0, defaultfield {n});
+ catch
+ field = fields {fieldindex (nf)};
+ defaultvalue = 1 - subsref (fac, struct ("type", ".", "subs", field));
+ end_try_catch
+ set (0, defaultfield, defaultvalue);
+ endfor
+ endif
+
+ ## Load all objects which qualify for being searched.
+ handles = fig;
+ h = fig;
+ while (numel (handles))
+ children = [];
+ for n = 1 : numel (handles)
+ children = union (children, get(handles(n), "children"));
+ endfor
+ handles = children;
+ h = union (h, children);
+ endwhile
+
+ for nh = 1 : numel(h)
+ p = get (h (nh));
+ fields = fieldnames (p);
+ fieldindex = find (!cellfun ("isempty", regexp(fields, 'color')));
+ if (numel (fieldindex))
+ for nf = 1 : numel (fieldindex);
+ field = fields {fieldindex (nf)};
+ c = subsref (p, struct ("type", ".", "subs", field));
+ if (! ischar(c) && columns(c) == 3)
+ set (h (nh), field, 1 - c);
+ endif
+ endfor
+ endif
+
+ ## If h(nh) is a figure or axes invert default color properties
+ typ = subsref (p, struct ("type", ".", "subs", "type"));
+ if (strcmp (typ, "axes") || strcmp (typ, "figure"))
+ def = get (h (nh), "default");
+ fields = fieldnames (def);
+ if (! isempty (fields))
+ fieldindex = find (!cellfun ("isempty", regexp(fields, 'color')));
+ for nf = 1 : numel (fieldindex)
+ defaultfield = fields {fieldindex (nf)};
+ defaultvalue = 1 - subsref (def, struct ("type", ".", "subs", defaultfield));
+ set (h (nh), defaultfield, defaultvalue);
+ endfor
+ endif
+ endif
+ endfor
+ else
+ ## FIXME
+ ## Is this the right thing to do in this case?
+ set (findall (fig, "type", "axes"), "color", color);
+ if (isroot)
+ defs = get (0, "default");
+ if (isfield (defs, "defaultaxescolor")
+ && strcmp (defs.defaultaxescolor, "none"))
+ set (0, "defaultaxescolor", color);
+ endif
+ endif
+ endif
+endfunction
+
+%!test
+%! dac = get (0, "defaultaxescolor");
+%! dfc = get (0, "defaultfigurecolor");
+%! hf = figure ("visible", "off");
+%! unwind_protect
+%! l = line;
+%! assert (get (hf, "color"), dfc);
+%! assert (get (gca, "color"), dac);
+%! whitebg (hf);
+%! assert (get (hf, "color"), 1 - dfc);
+%! assert (get (gca, "color"), 1 - dac);
+%! c = [0.2 0.2 0.2];
+%! whitebg (hf, c);
+%! assert (get (hf, "color"), 1 - dfc);
+%! assert (get (gca, "color"), c);
+%! unwind_protect_cleanup
+%! close (hf);
+%! end_unwind_protect
git://git.creatis.insa-lyon.fr / CreaPhase.git / blobdiff