update packages

[CreaPhase.git] / octave_packages / m / plot / graphics_toolkit.m

diff --git a/octave_packages/m/plot/graphics_toolkit.m b/octave_packages/m/plot/graphics_toolkit.m
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+## Copyright (C) 2008-2012 Michael Goffioul
+##
+## 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{name} =} graphics_toolkit ()
+## @deftypefnx {Function File} {@var{old_name} =} graphics_toolkit (@var{name})
+## @deftypefnx {Function File} {} graphics_toolkit (@var{hlist}, @var{name})
+## Query or set the default graphics toolkit to @var{name}.  If the
+## toolkit is not already loaded, it is first initialized by calling the
+## function @code{__init_@var{name}__}.
+##
+## When called with a list of figure handles, @var{hlist}, the graphics
+## toolkit is changed only for the listed figures.
+## @seealso{available_graphics_toolkits}
+## @end deftypefn
+
+function retval = graphics_toolkit (name, hlist = [])
+
+  if (nargin > 2)
+    print_usage ();
+  endif
+
+  if (nargout > 0 || nargin == 0)
+    retval = get (0, "defaultfigure__graphics_toolkit__");
+  endif
+
+  if (nargin == 0)
+    return;
+  elseif (nargin == 1)
+    if (! ischar (name))
+      error ("graphics_toolkit: invalid graphics toolkit NAME");
+    endif
+  elseif (nargin == 2)
+    ## Swap input arguments
+    [hlist, name] = deal (name, hlist);
+    if (! all (isfigure (hlist)))
+      error ("graphics_toolkit: invalid figure handle list HLIST");
+    elseif (! ischar (name))
+      error ("graphics_toolkit: invalid graphics toolkit NAME");
+    endif
+  endif
+
+  if (! any (strcmp (loaded_graphics_toolkits (), name)))
+    feval (["__init_", name, "__"]);
+    if (! any (strcmp (loaded_graphics_toolkits (), name)))
+      error ("graphics_toolkit: %s toolkit was not correctly loaded", name);
+    endif
+  endif
+
+  if (isempty (hlist))
+    set (0, "defaultfigure__graphics_toolkit__", name);
+  else
+    set (hlist, "__graphics_toolkit__", name);
+  endif
+
+endfunction
+
+
+%!testif HAVE_FLTK
+%! unwind_protect
+%!   hf = figure ("visible", "off"); 
+%!   toolkit = graphics_toolkit ();
+%!   assert (get (0, "defaultfigure__graphics_toolkit__"), toolkit);
+%!   graphics_toolkit (hf, "fltk"); 
+%!   assert (get (hf, "__graphics_toolkit__"), "fltk");
+%! unwind_protect_cleanup
+%!   close (hf);
+%! end_unwind_protect
+
+%!testif HAVE_FLTK
+%!  old_toolkit = graphics_toolkit ();
+%!  switch old_toolkit
+%!    case {"gnuplot"}
+%!      new_toolkit = "fltk";
+%!    otherwise
+%!      new_toolkit = "gnuplot";
+%!  endswitch
+%!  assert (graphics_toolkit (new_toolkit), old_toolkit)
+%!  assert (graphics_toolkit (old_toolkit), new_toolkit)
+