explicitly close figures in clean_up_and_exit instead of using an atexit function * graphics.cc (Fdrawnow): Don't register __go_close_all__ as an atexit function. * __go_close_all__.m: Delete. * plot/module.mk (plot_FCN_FILES): Remove __go_close_all__.m from the list. * graphics.cc (gh_manager::create_instance): Do register cleanup function. * graphics.cc (delete_graphics_objects, delete_graphics_object, close_figure, force_close_figure): New functions. (F__go_delete__): Call delete_graphics_objects to do the work. * graphics.h, graphics.cc (gh_manager::close_all_figures, gh_manager::do_close_all_figures): New functions. * graphics.h.in, graphics.cc (close_all_figures): New function. * toplev.cc (clean_up_and_exit): Call close_all_figures. * graphics.h.in (uitoggletool::~uitoggletool, uipushtool::~uipushtool, uitoolbar::~uitoolbar, uipanel::~uipanel, uicontrol::~uicontrol, uicontextmenu::~uicontextmenu, uimenu::~uimenu, hggroup::~hggroup, surface::~surface, image::~image, text::~text, line::~line, axes::~axes, figure::~figure, root_figure::~root_figure): Don't delete children. * toplev.cc (SAFE_CALL, IGNORE_INTERRUPT): Rename to OCTAVE_SAFE_CALL and OCTAVE_IGNORE_INTERRUPT and move to toplev.h. Temporarily set Vdebug_on_error and Vdebug_on_warning. Reset error_state to zero. Change all callers. * graphics.h.in (base_graphics_toolkit::close): New virtual function. (graphics_toolkit::close, graphics_toolkit::close_all_toolkits): New functions. * graphics.cc (gnuplot_toolkit::close): New function. ): * __init_fltk__.cc (F__init_fltk__): Don't register __remove_fltk__ as an atexit function. (F__remove_fltk__): Move to fltk_toolkit::close.

## Copyright (C) 2008-2011 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} {} refresh ()
## @deftypefnx {Function File} {} refresh (@var{h})
## Refresh a figure, forcing it to be redrawn.  Called without an
## argument the current figure is redrawn, otherwise the figure pointed
## to by @var{h} is redrawn.
## @seealso{drawnow}
## @end deftypefn

function refresh (h)

  if (nargin == 1)
    if (!ishandle (h) || !strcmp (get (h, "type"), "figure"))
      error ("refresh: expecting argument to be a valid figure handle");
    endif
  elseif (nargin > 1)
    print_usage ();
  else
    h = gcf ();
  endif

  set(h,"__modified__", "on");
  drawnow ();
endfunction