changeset 11576:8ac9687dbe9f

rename backend to graphics_toolkit
author John W. Eaton <jwe@octave.org>
date Thu, 20 Jan 2011 02:29:57 -0500
parents d6619410e79c
children b124b83e5626
files ChangeLog NEWS configure.ac doc/ChangeLog doc/faq/OctaveFAQ.texi doc/interpreter/contrib.txi doc/interpreter/doccheck/aspell-octave.en.pws doc/interpreter/geometryimages.m doc/interpreter/interpimages.m doc/interpreter/octave.texi doc/interpreter/plot.txi doc/interpreter/plotimages.m doc/interpreter/sparseimages.m scripts/ChangeLog scripts/plot/__fltk_print__.m scripts/plot/__gnuplot_print__.m scripts/plot/__print_parse_opts__.m scripts/plot/axis.m scripts/plot/backend.m scripts/plot/colorbar.m scripts/plot/ginput.m scripts/plot/gnuplot_drawnow.m scripts/plot/graphics_toolkit.m scripts/plot/module.mk scripts/plot/print.m scripts/plot/private/__actual_axis_position__.m scripts/plot/subplot.m scripts/plot/uigetdir.m scripts/plot/uigetfile.m scripts/plot/uiputfile.m src/ChangeLog src/DLD-FUNCTIONS/__init_fltk__.cc src/DLD-FUNCTIONS/fltk_backend.cc src/DLD-FUNCTIONS/module-files src/Makefile.am src/gl-render.cc src/gl-render.h src/graphics.cc src/graphics.h.in
diffstat 39 files changed, 2473 insertions(+), 2428 deletions(-) [+]
line wrap: on
line diff
--- a/ChangeLog	Wed Jan 19 21:16:13 2011 -0800
+++ b/ChangeLog	Thu Jan 20 02:29:57 2011 -0500
@@ -1,3 +1,7 @@
+2011-01-20  John W. Eaton  <jwe@octave.org>
+
+	* configure.ac, NEWS: Update for backend -> graphics_toolkit change.
+
 2010-01-17  Rik  <octave@nomad.inbox5.com>
 
 	* NEWS: Add quadcc to list of new functions added.
--- a/NEWS	Wed Jan 19 21:16:13 2011 -0800
+++ b/NEWS	Thu Jan 20 02:29:57 2011 -0500
@@ -437,28 +437,28 @@
 
  ** New graphics functions:
 
-      addlistener         ezcontour   gcbo         refresh  
-      addproperty         ezcontourf  ginput       refreshdata
-      allchild            ezmesh      gtext        specular
-      available_backends  ezmeshc     intwarning   surfl
-      backend             ezplot      ishghandle   trisurf
-      cla                 ezplot3     isocolors    waitforbuttonpress
-      clabel              ezpolar     isonormals
-      comet               ezsurf      isosurface  
-      dellistener         findall     linkprop   
-      diffuse             gcbf        plotmatrix
+      addlistener                  ezcontour   gcbo         refresh  
+      addproperty                  ezcontourf  ginput       refreshdata
+      allchild                     ezmesh      gtext        specular
+      available_graphics_toolkits  ezmeshc     intwarning   surfl
+      graphics_toolkit             ezplot      ishghandle   trisurf
+      cla                          ezplot3     isocolors    waitforbuttonpress
+      clabel                       ezpolar     isonormals
+      comet                        ezsurf      isosurface  
+      dellistener                  findall     linkprop   
+      diffuse                      gcbf        plotmatrix
 
  ** New experimental OpenGL/FLTK based plotting system.
 
     An experimental plotting system based on OpenGL and the FLTK
-    toolkit is now part of Octave.  This backend is disabled by
+    toolkit is now part of Octave.  This graphics toolkit is disabled by
     default.  You can switch to using it with the command
 
-        backend ("fltk")
+        graphics_toolkit ("fltk")
 
     for all future figures or for a particular figure with the command
 
-        backend (h, "fltk")
+        graphics_toolkit (h, "fltk")
 
     where "h" is a valid figure handle.
 
--- a/configure.ac	Wed Jan 19 21:16:13 2011 -0800
+++ b/configure.ac	Thu Jan 20 02:29:57 2011 -0500
@@ -2393,7 +2393,7 @@
   if $native_graphics; then
     AC_MSG_WARN([])
     AC_MSG_WARN([I didn't find gnuplot.  Plotting commands will use the])
-    AC_MSG_WARN([native graphics backend.])
+    AC_MSG_WARN([native graphics toolkit.])
   else
     AC_MSG_WARN([I didn't find gnuplot.  It isn't necessary to have gnuplot])
     AC_MSG_WARN([installed, but you won't be able to use any of Octave's])
--- a/doc/ChangeLog	Wed Jan 19 21:16:13 2011 -0800
+++ b/doc/ChangeLog	Thu Jan 20 02:29:57 2011 -0500
@@ -1,3 +1,13 @@
+2011-01-20  John W. Eaton  <jwe@octave.org>
+
+	* faq/OctaveFAQ.texi, interpreter/doccheck/aspell-octave.en.pws,
+	interpreter/octave.texi, interpreter/plot.txi: Update for
+	backend -> graphics_toolkit change.
+
+	* interpreter/interpimages.m, interpreter/geometryimages.m,
+	interpreter/sparseimages.m, interpreter/plotimages.m:
+	Call graphics_toolkit, not backend. 
+
 2011-01-19  Rik  <octave@nomad.inbox5.com>
 
 	* interpreter/doccheck/aspell-octave.en.pws: Add new words to Octave
--- a/doc/faq/OctaveFAQ.texi	Wed Jan 19 21:16:13 2011 -0800
+++ b/doc/faq/OctaveFAQ.texi	Thu Jan 20 02:29:57 2011 -0500
@@ -304,9 +304,9 @@
 3.2.N release in the future. This series brings the new features
 
 @itemize
-@item OpenGL backend
+@item OpenGL graphics toolkit
 
-An experimental OpenGL graphics backend to replace the gnuplot
+An experimental OpenGL graphics toolkit to replace the gnuplot.
 
 @item Object Orient Programming
 
--- a/doc/interpreter/contrib.txi	Wed Jan 19 21:16:13 2011 -0800
+++ b/doc/interpreter/contrib.txi	Thu Jan 20 02:29:57 2011 -0500
@@ -147,10 +147,10 @@
 
 @example
 @group
-2008-04-02  David Bateman  <dbateman@@free.fr>
+2010-04-13  David Bateman  <dbateman@@free.fr>
 
-        * graphics.cc (void gnuplot_backend::close_figure (const
-        octave_value&) const): Allow for an input and output stream.
+	* DLD-FUNCTIONS/regexp.cc (octregexp_list): Handle repeated matches
+	in the list of matches returned by pcre.
 @end group
 @end example
 
--- a/doc/interpreter/doccheck/aspell-octave.en.pws	Wed Jan 19 21:16:13 2011 -0800
+++ b/doc/interpreter/doccheck/aspell-octave.en.pws	Thu Jan 20 02:29:57 2011 -0500
@@ -37,9 +37,6 @@
 autoregressions
 autoscaled
 AWK
-backend
-Backends
-backends
 bartlett
 Bateman
 BDF
--- a/doc/interpreter/geometryimages.m	Wed Jan 19 21:16:13 2011 -0800
+++ b/doc/interpreter/geometryimages.m	Thu Jan 20 02:29:57 2011 -0500
@@ -17,7 +17,7 @@
 ## <http://www.gnu.org/licenses/>.
 
 function geometryimages (nm, typ)
-  backend ("gnuplot");
+  graphics_toolkit ("gnuplot");
   set_print_size ();
   hide_output ();
   if (strcmp (typ, "png"))
--- a/doc/interpreter/interpimages.m	Wed Jan 19 21:16:13 2011 -0800
+++ b/doc/interpreter/interpimages.m	Thu Jan 20 02:29:57 2011 -0500
@@ -17,7 +17,7 @@
 ## <http://www.gnu.org/licenses/>.
 
 function interpimages (nm, typ)
-  backend ("gnuplot");
+  graphics_toolkit ("gnuplot");
   set_print_size ();
   hide_output ();
   if (strcmp (typ, "png"))
--- a/doc/interpreter/octave.texi	Wed Jan 19 21:16:13 2011 -0800
+++ b/doc/interpreter/octave.texi	Thu Jan 20 02:29:57 2011 -0500
@@ -542,7 +542,7 @@
 * Marker Styles::               
 * Callbacks::                   
 * Object Groups::               
-* Graphics Backends::           
+* Graphics Toolkits::           
 
 Object Groups
 
@@ -558,7 +558,7 @@
 * Stem Series::                 
 * Surface Group::               
 
-Graphics Backends
+Graphics Toolkits
 
 * Interaction with gnuplot::    
 
--- a/doc/interpreter/plot.txi	Wed Jan 19 21:16:13 2011 -0800
+++ b/doc/interpreter/plot.txi	Thu Jan 20 02:29:57 2011 -0500
@@ -34,14 +34,14 @@
 Earlier versions of Octave provided plotting through the use of
 gnuplot.  This capability is still available.  But, a newer plotting
 capability is provided by access to OpenGL@.  Which plotting system
-is used is controlled by the @code{backend} function.  (See @ref{Graphics
-Backends}.)
-
-The function call @code{backend ("fltk")} selects the fltk/OpenGL system, and
-@code{backend ("gnuplot")} selects the gnuplot system.
-The two systems may be used selectively through the use of the @code{backend}
-property of the graphics handle for each figure.  This is
-explained in @ref{Graphics Data Structures}.
+is used is controlled by the @code{graphics_toolkit} function.  (See
+@ref{Graphics Toolkits}.)
+
+The function call @code{graphics_toolkit ("fltk")} selects the
+fltk/OpenGL system, and @code{graphics_toolkit ("gnuplot")} selects the
+gnuplot system.  The two systems may be used selectively through the use
+of the @code{graphics_toolkit} property of the graphics handle for each
+figure.  This is explained in @ref{Graphics Data Structures}.
 
 @node High-Level Plotting
 @section High-Level Plotting
@@ -929,24 +929,30 @@
 get (h, "");
 error: get: ambiguous figure property name ; possible matches:
 
-__backend__            currentobject          paperposition          toolbar
-__enhanced__           deletefcn              paperpositionmode      type
-__modified__           dockcontrols           papersize              uicontextmenu
-__myhandle__           doublebuffer           papertype              units
-__plot_stream__        filename               paperunits             userdata
-alphamap               handlevisibility       parent                 visible
-beingdeleted           hittest                pointer                windowbuttondownfcn
-busyaction             integerhandle          pointershapecdata      windowbuttonmotionfcn
-buttondownfcn          interruptible          pointershapehotspot    windowbuttonupfcn
-children               inverthardcopy         position               windowbuttonwheelfcn
-clipping               keypressfcn            renderer               windowstyle
-closerequestfcn        keyreleasefcn          renderermode           wvisual
-color                  menubar                resize                 wvisualmode
-colormap               mincolormap            resizefcn              xdisplay
-createfcn              name                   selected               xvisual
-currentpoint           nextplot               selectionhighlight     xvisualmode
-currentaxes            numbertitle            selectiontype
-currentcharacter       paperorientation       tag
+__graphics_toolkit__  hittest              resize
+__enhanced__          integerhandle        resizefcn
+__modified__          interruptible        selected
+__myhandle__          inverthardcopy       selectionhighlight
+__plot_stream__       keypressfcn          selectiontype
+alphamap              keyreleasefcn        tag
+beingdeleted          menubar              toolbar
+busyaction            mincolormap          type
+buttondownfcn         name                 uicontextmenu
+children              nextplot             units
+clipping              numbertitle          userdata
+closerequestfcn       paperorientation     visible
+color                 paperposition        windowbuttondownfcn
+colormap              paperpositionmode    windowbuttonmotionfcn
+createfcn             papersize            windowbuttonupfcn
+currentaxes           papertype            windowbuttonwheelfcn
+currentcharacter      paperunits           windowstyle
+currentobject         parent               wvisual
+currentpoint          pointer              wvisualmode
+deletefcn             pointershapecdata    xdisplay
+dockcontrols          pointershapehotspot  xvisual
+doublebuffer          position             xvisualmode
+filename              renderer
+handlevisibility      renderermode
 @end smallexample
 
 The root figure has index 0.  Its properties may be displayed by:
@@ -1200,8 +1206,8 @@
 
 The @code{figure} properties are:
 @table @code
-@item __backend__  
---- The backend currently in use.
+@item __graphics_toolkit__  
+--- The graphics toolkit currently in use.
 
 @item __enhanced__
 
@@ -2442,7 +2448,7 @@
 * Marker Styles::               
 * Callbacks::                   
 * Object Groups::               
-* Graphics Backends::           
+* Graphics Toolkits::           
 @end menu
 
 
@@ -3204,14 +3210,14 @@
 Data source variables.
 @end table
 
-@node Graphics Backends
-@subsection Graphics Backends
-@cindex graphics backends
-@cindex backends, graphics
-
-@DOCSTRING(backend)
-
-@DOCSTRING(available_backends)
+@node Graphics Toolkits
+@subsection Graphics Toolkits
+@cindex graphics toolkits
+@cindex toolkits, graphics
+
+@DOCSTRING(graphics_toolkit)
+
+@DOCSTRING(available_graphics_toolkits)
 
 @menu
 * Interaction with gnuplot::    
--- a/doc/interpreter/plotimages.m	Wed Jan 19 21:16:13 2011 -0800
+++ b/doc/interpreter/plotimages.m	Thu Jan 20 02:29:57 2011 -0500
@@ -17,7 +17,7 @@
 ## <http://www.gnu.org/licenses/>.
 
 function plotimages (nm, typ)
-  backend ("gnuplot");
+  graphics_toolkit ("gnuplot");
   set_print_size ();
   hide_output ();
   if (strcmp (typ, "png"))
--- a/doc/interpreter/sparseimages.m	Wed Jan 19 21:16:13 2011 -0800
+++ b/doc/interpreter/sparseimages.m	Thu Jan 20 02:29:57 2011 -0500
@@ -17,7 +17,7 @@
 ## <http://www.gnu.org/licenses/>.
 
 function sparseimages (nm, typ)
-  backend ("gnuplot");
+  graphics_toolkit ("gnuplot");
   set_print_size ();
   if (strcmp (typ, "png"))
     set (0, "defaulttextfontname", "*");
--- a/scripts/ChangeLog	Wed Jan 19 21:16:13 2011 -0800
+++ b/scripts/ChangeLog	Thu Jan 20 02:29:57 2011 -0500
@@ -1,3 +1,15 @@
+2011-01-20  John W. Eaton  <jwe@octave.org>
+
+	* plot/ginput.m, plot/gnuplot_drawnow.m, plot/uiputfile.m,
+	plot/subplot.m, plot/axis.m, plot/colorbar.m,
+	plot/__print_parse_opts__.m, plot/uigetdir.m,
+	plot/__fltk_print__.m, plot/print.m, plot/__gnuplot_print__.m,
+	plot/uigetfile.m, plot/private/__actual_axis_position__.m:
+	Update for backend -> graphics_toolkit change.
+
+	* plot/graphics_toolkit.m: Rename from backend.m.
+	* plot/module.mk (plot_FCN_FILES): Update list.
+
 2011-01-19  Rik  <octave@nomad.inbox5.com>
 
 
--- a/scripts/plot/__fltk_print__.m	Wed Jan 19 21:16:13 2011 -0800
+++ b/scripts/plot/__fltk_print__.m	Thu Jan 20 02:29:57 2011 -0500
@@ -110,7 +110,7 @@
     pipeline = {sprintf("%s > %s", cmd, opts.name)};
   case {"corel", "gif"}
     error ("print:unsupporteddevice",
-           "print.m: %s output is not available for the FLTK backend.",
+           "print.m: %s output is not available for the FLTK graphics toolkit",
            upper (opts.devopt))
   case opts.ghostscript.device
     opts.ghostscript.source = "-";
--- a/scripts/plot/__gnuplot_print__.m	Wed Jan 19 21:16:13 2011 -0800
+++ b/scripts/plot/__gnuplot_print__.m	Thu Jan 20 02:29:57 2011 -0500
@@ -138,7 +138,7 @@
     endif
   otherwise
     error (sprintf ("print:no%soutput", opts.devopt),
-           "print.m: %s output is not available for the Gnuplot backend.",
+           "print.m: %s output is not available for the Gnuplot graphics toolkit",
            upper (opts.devopt))
   endswitch
 
--- a/scripts/plot/__print_parse_opts__.m	Wed Jan 19 21:16:13 2011 -0800
+++ b/scripts/plot/__print_parse_opts__.m	Thu Jan 20 02:29:57 2011 -0500
@@ -225,13 +225,13 @@
               "eps", "ps", "ps", "pdf"};
 
   if (isfigure (arg_st.figure))
-    __backend__ = get (arg_st.figure, "__backend__");
+    __graphics_toolkit__ = get (arg_st.figure, "__graphics_toolkit__");
   else
     ## Allow tests when no figures are present.
-    __backend__ = get (0, "defaultfigure__backend__");
+    __graphics_toolkit__ = get (0, "defaultfigure__graphics_toolkit__");
   endif
 
-  if (strcmp (__backend__, "gnuplot")
+  if (strcmp (__graphics_toolkit__, "gnuplot")
       && __gnuplot_has_feature__ ("epslatex_implies_eps_filesuffix"))
     suffixes(strncmp (dev_list, "epslatex", 8)) = {"eps"};
   endif
@@ -322,7 +322,7 @@
       paperposition = [0.25, 2.50, 8.00, 6.00] * 72;
     endif
     arg_st.canvas_size = paperposition(3:4);
-    if (strcmp (__backend__, "gnuplot") && ! arg_st.ghostscript.epscrop)
+    if (strcmp (__graphics_toolkit__, "gnuplot") && ! arg_st.ghostscript.epscrop)
       arg_st.ghostscript.pageoffset = paperposition(1:2) - 50;
     else
       arg_st.ghostscript.pageoffset = paperposition(1:2);
@@ -594,7 +594,7 @@
   ##                            "ps", "ps2", "psc", "psc2"
   ##
   ## eps, epsc, eps2, epsc2 are not included here because those are 
-  ## are generated by the backend.
+  ## are generated by the graphics toolkit.
   aliases.bmp = "bmp32b";
   aliases.pdf = "pdfwrite";
   aliases.png = "png16m";
--- a/scripts/plot/axis.m	Wed Jan 19 21:16:13 2011 -0800
+++ b/scripts/plot/axis.m	Thu Jan 20 02:29:57 2011 -0500
@@ -181,7 +181,7 @@
     elseif (strcmpi (ax, "square"))
       set (ca, "plotboxaspectratio", [1, 1, 1]);
     elseif  (strcmp (ax, "equal"))
-      if (strcmp (get (get (ca, "parent"), "__backend__"), "gnuplot"))
+      if (strcmp (get (get (ca, "parent"), "__grahpics_toolkit__"), "gnuplot"))
         ## FIXME - gnuplot applies the aspect ratio activepostionproperty.
         set (ca, "activepositionproperty", "position");
         ## The following line is a trick used to trigger the recalculation of 
--- a/scripts/plot/backend.m	Wed Jan 19 21:16:13 2011 -0800
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,70 +0,0 @@
-## Copyright (C) 2008-2011 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} {} backend (@var{name})
-## @deftypefnx {Function File} {} backend (@var{hlist}, @var{name})
-## Change the default graphics backend to @var{name}.  If the backend is
-## not already loaded, it is first initialized (initialization is done
-## through the execution of @code{__init_@var{name}__}).
-##
-## When called with a list of figure handles, @var{hlist}, the backend is
-## changed only for the listed figures.
-## @seealso{available_backends}
-## @end deftypefn
-
-function backend (varargin)
-
-  name = "";
-  hlist = [];
-
-  if (nargin == 1)
-    if (ischar (varargin{1}))
-      name = varargin{1};
-    else
-      error ("backend: invalid backend NAME");
-    endif
-  elseif (nargin == 2)
-    if (isnumeric (varargin{1}) && ischar (varargin{2}))
-      hlist = varargin{1};
-      name = varargin{2};
-    elseif (ischar (varargin{2}))
-      error ("backend: invalid handle list");
-    else
-      error ("backend: invalid backend NAME");
-    endif
-  else
-    print_usage ();
-  endif
-
-  if (! any (strcmp (available_backends (), name)))
-    feval (["__init_", name, "__"]);
-    if (! any (strcmp (available_backends (), name)))
-      error ("backend: backend was not correctly registered");
-    endif
-  endif
-
-  if (isempty (hlist))
-    set (0, "defaultfigure__backend__", name);
-  else
-    for h = hlist(:)'
-      set (h, "__backend__", name);
-    endfor
-  endif
-
-endfunction
--- a/scripts/plot/colorbar.m	Wed Jan 19 21:16:13 2011 -0800
+++ b/scripts/plot/colorbar.m	Thu Jan 20 02:29:57 2011 -0500
@@ -107,8 +107,8 @@
 
   if (! deleting)
     ## FIXME - Matlab does not require the "position" property to be active.
-    ##         Is there a way to determine the plotbox position for the gnuplot
-    ##         backend with the outerposition is active?
+    ##         Is there a way to determine the plotbox position for the
+    ##         gnuplot graphics toolkit with the outerposition is active?
     set (ax, "activepositionproperty", "position");
     obj = get (ax);
     obj.__my_handle__ = ax;
@@ -274,7 +274,7 @@
     else
       scale = [scale, 1];
     endif
-    if (strcmp (get (cf, "__backend__"), "gnuplot")
+    if (strcmp (get (cf, "__graphics_toolkit__"), "gnuplot")
         && strcmp (obj.activepositionproperty, "outerposition"))
       obj.outerposition = obj.outerposition .* [1, 1, scale];
       off = 0.5 * (obj.outerposition (3:4) - __actual_axis_position__ (obj)(3:4));
--- a/scripts/plot/ginput.m	Wed Jan 19 21:16:13 2011 -0800
+++ b/scripts/plot/ginput.m	Thu Jan 20 02:29:57 2011 -0500
@@ -32,13 +32,13 @@
 
   f = gcf ();
   drawnow ();
-  backend = (get (f, "__backend__"));
+  toolkit = (get (f, "__graphics_toolkit__"));
 
   varargout = cell (1, nargout);
   if (nargin == 0)
-    [varargout{:}] = feval (strcat ("__", backend, "_ginput__"), f);
+    [varargout{:}] = feval (strcat ("__", toolkit, "_ginput__"), f);
   else
-    [varargout{:}] = feval (strcat ("__", backend, "_ginput__"), f, n);
+    [varargout{:}] = feval (strcat ("__", toolkit, "_ginput__"), f, n);
   endif
 
 endfunction
--- a/scripts/plot/gnuplot_drawnow.m	Wed Jan 19 21:16:13 2011 -0800
+++ b/scripts/plot/gnuplot_drawnow.m	Thu Jan 20 02:29:57 2011 -0500
@@ -117,12 +117,13 @@
   ## Generate the gnuplot "set terminal <term> ..." command.
   ## When "term" originates from print.m, it may include other options.
   if (nargin < 4)
-    ## This supports the gnuplot backend.
+    ## This supports the gnuplot graphics toolkit.
     term = gnuplot_default_term ();
     opts_str = "";
   else
     ## Get the one word terminal id and save the remaining as options to
-    ## be passed on to gnuplot.  The terminal may respect the backend.
+    ## be passed on to gnuplot.  The terminal may respect the graphics
+    ## toolkit. 
     [term, opts_str] = gnuplot_trim_term (term);
     term = lower (term);
     if (strcmpi (term, "lua"))
@@ -149,7 +150,7 @@
 
     if (! isempty (h) && isfigure (h))
 
-      ## Generate gnuplot title string for backend plot windows.
+      ## Generate gnuplot title string for plot windows.
       if (output_to_screen (term) && ~strcmp (term, "dumb"))
         fig.numbertitle = get (h, "numbertitle");
         fig.name = get (h, "name");
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/plot/graphics_toolkit.m	Thu Jan 20 02:29:57 2011 -0500
@@ -0,0 +1,71 @@
+## Copyright (C) 2008-2011 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} {} graphics_toolkit (@var{name})
+## @deftypefnx {Function File} {} graphics_toolkit (@var{hlist}, @var{name})
+## Change the default graphics 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 graphics_toolkit (varargin)
+
+  name = "";
+  hlist = [];
+
+  if (nargin == 1)
+    if (ischar (varargin{1}))
+      name = varargin{1};
+    else
+      error ("graphics_toolkit: invalid graphics toolkit NAME");
+    endif
+  elseif (nargin == 2)
+    if (isnumeric (varargin{1}) && ischar (varargin{2}))
+      hlist = varargin{1};
+      name = varargin{2};
+    elseif (ischar (varargin{2}))
+      error ("graphics_toolkit: invalid handle list");
+    else
+      error ("graphics_toolkit: invalid graphics toolkit NAME");
+    endif
+  else
+    print_usage ();
+  endif
+
+  if (! any (strcmp (available_graphics_toolkits (), name)))
+    feval (["__init_", name, "__"]);
+    if (! any (strcmp (available_graphics_toolkits (), name)))
+      error ("graphics_toolkit: %s toolkit was not correctly registered",
+             name);
+    endif
+  endif
+
+  if (isempty (hlist))
+    set (0, "defaultfigure__graphics_toolkit__", name);
+  else
+    for h = hlist(:)'
+      set (h, "__graphics_toolkit__", name);
+    endfor
+  endif
+
+endfunction
--- a/scripts/plot/module.mk	Wed Jan 19 21:16:13 2011 -0800
+++ b/scripts/plot/module.mk	Thu Jan 20 02:29:57 2011 -0500
@@ -52,7 +52,7 @@
   plot/area.m \
   plot/axes.m \
   plot/axis.m \
-  plot/backend.m \
+  plot/graphics_toolkit.m \
   plot/bar.m \
   plot/barh.m \
   plot/box.m \
--- a/scripts/plot/print.m	Wed Jan 19 21:16:13 2011 -0800
+++ b/scripts/plot/print.m	Thu Jan 20 02:29:57 2011 -0500
@@ -69,15 +69,15 @@
 ##   @itemx ps2
 ##   @itemx psc
 ##   @itemx psc2
-##     Postscript (level 1 and 2, mono and color).  The FLTK backend
-## generates Postscript level 3.0.
+##     Postscript (level 1 and 2, mono and color).  The FLTK graphics
+##     toolkit generates Postscript level 3.0.
 ##
 ##   @item eps
 ##   @itemx eps2
 ##   @itemx epsc
 ##   @itemx epsc2
 ##     Encapsulated postscript (level 1 and 2, mono and color).  The FLTK
-## backend generates Postscript level 3.0.
+## graphic toolkit generates Postscript level 3.0.
 ##
 ##   @item tex
 ##   @itemx epslatex
@@ -90,7 +90,7 @@
 ## processed directly by @LaTeX{}.  The other formats are intended to
 ## be included in a @LaTeX{} (or @TeX{}) document.  The @code{tex} device
 ## is the same as the @code{epslatex} device.  The @code{pdflatex} device
-## is only available for the FLTK backend.
+## is only available for the FLTK graphics toolkit.
 ##
 ##   @item tikz
 ##     Generate a @LaTeX{} file using PGF/TikZ@.  For the FLTK the result is
@@ -112,7 +112,7 @@
 ##     Microsoft Enhanced Metafile
 ##
 ##   @item fig
-##     XFig.  For the Gnuplot backend, the additional options
+##     XFig.  For the Gnuplot graphics toolkit, the additional options
 ##     @option{-textspecial} or @option{-textnormal} can be used to control
 ##     whether the special flag should be set for the text in
 ##     the figure (default is @option{-textnormal}). 
@@ -131,7 +131,7 @@
 ##     JPEG image
 ##
 ##   @item gif
-##     GIF image (only available for the Gnuplot backend)
+##     GIF image (only available for the Gnuplot graphics toolkit)
 ##
 ##   @item pbm
 ##     PBMplus
@@ -283,7 +283,7 @@
     ## Modify properties as specified by options
     props = [];
 
-    ## backend tranlates figure position to eps bbox in points
+    ## graphics toolkit tranlates figure position to eps bbox in points
     fpos = get (opts.figure, "position");
     props(1).h = opts.figure;
     props(1).name = "position";
@@ -316,7 +316,7 @@
     endif
 
     if (opts.use_color < 0
-        && ! strcmp (get (opts.figure, "__backend__"), "gnuplot"))
+        && ! strcmp (get (opts.figure, "__graphics_toolkit__"), "gnuplot"))
       color_props = {"color", "facecolor", "edgecolor", "colormap"};
       for c = 1:numel(color_props)
         h = findall (opts.figure, "-property", color_props{c});
@@ -374,8 +374,8 @@
       endif
     endif
 
-    ## call the backend print script
-    switch (get (opts.figure, "__backend__"))
+    ## call the graphcis toolkit print script
+    switch (get (opts.figure, "__graphics_toolkit__"))
     case "gnuplot"
       opts = __gnuplot_print__ (opts);
     otherwise
--- a/scripts/plot/private/__actual_axis_position__.m	Wed Jan 19 21:16:13 2011 -0800
+++ b/scripts/plot/private/__actual_axis_position__.m	Thu Jan 20 02:29:57 2011 -0500
@@ -44,7 +44,7 @@
     set (axis_obj.parent, "position", orig_fig_position)
   end_unwind_protect
   ## Get axes size in pixels
-  if (strcmp (get (axis_obj.parent, "__backend__"), "gnuplot")
+  if (strcmp (get (axis_obj.parent, "__graphics_toolkit__"), "gnuplot")
       && strcmp (axis_obj.activepositionproperty, "outerposition"))
     pos_in_pixels = axis_obj.outerposition .* fig_position([3, 4, 3, 4]);
   else
@@ -76,7 +76,7 @@
       pos_in_pixels = pos_in_pixels + dy*[0.0, 0.5, 0.0, -1.0];
     endif
     pos = pos_in_pixels ./ fig_position([3, 4, 3, 4]);
-  elseif (strcmp (get (axis_obj.parent, "__backend__"), "gnuplot")
+  elseif (strcmp (get (axis_obj.parent, "__graphics_toolkit__"), "gnuplot")
           && strcmp (axis_obj.activepositionproperty, "outerposition"))
     pos = axis_obj.outerposition;
   else
--- a/scripts/plot/subplot.m	Wed Jan 19 21:16:13 2011 -0800
+++ b/scripts/plot/subplot.m	Thu Jan 20 02:29:57 2011 -0500
@@ -168,7 +168,7 @@
                   "activepositionproperty", "outerposition");
     endif
 
-    if (align_axes && strcmp (get (cf, "__backend__"), "gnuplot"))
+    if (align_axes && strcmp (get (cf, "__graphics_toolkit__"), "gnuplot"))
       set (tmp, "activepositionproperty", "position");
     endif
 
--- a/scripts/plot/uigetdir.m	Wed Jan 19 21:16:13 2011 -0800
+++ b/scripts/plot/uigetdir.m	Thu Jan 20 02:29:57 2011 -0500
@@ -38,13 +38,13 @@
   endif
   
 
-  if (any (strcmp (available_backends(), "fltk")))
+  if (any (strcmp (available_graphics_toolkits (), "fltk")))
       if (!isdir (init_path))
         init_path = fileparts (init_path);
       endif
       dirname = __fltk_uigetfile__ ("", dialog_name, init_path, [240, 120], "dir");
   else
-    error ("uigetdir: fltk backend required.");
+    error ("uigetdir: fltk graphics toolkit required");
   endif
 
 endfunction
--- a/scripts/plot/uigetfile.m	Wed Jan 19 21:16:13 2011 -0800
+++ b/scripts/plot/uigetfile.m	Thu Jan 20 02:29:57 2011 -0500
@@ -150,10 +150,10 @@
     error ("uigetfile: number of input arguments must be less than eight");
   endif
 
-  if (any (cellfun(@(x)strcmp (x, "fltk"), available_backends)))
+  if (any (cellfun(@(x)strcmp (x, "fltk"), available_graphics_toolkits ())))
     [retfile, retpath, retindex] = __fltk_uigetfile__ (outargs{:});  
   else
-    error ("uigetfile: fltk backend required.");
+    error ("uigetfile: fltk graphics toolkit required.");
   endif
 
          
--- a/scripts/plot/uiputfile.m	Wed Jan 19 21:16:13 2011 -0800
+++ b/scripts/plot/uiputfile.m	Thu Jan 20 02:29:57 2011 -0500
@@ -89,10 +89,10 @@
     error ("uiputfile: number of input arguments must be less than four.");
   endif
 
-  if (any (cellfun(@(x)strcmp (x, "fltk"), available_backends)))
+  if (any (cellfun(@(x)strcmp (x, "fltk"), available_graphics_toolkits ())))
     [retfile, retpath, retindex] = __fltk_uigetfile__ (outargs{:});  
   else
-    error ("uiputfile: fltk backend required.");
+    error ("uiputfile: fltk graphics toolkit required");
   endif
 
 endfunction
--- a/src/ChangeLog	Wed Jan 19 21:16:13 2011 -0800
+++ b/src/ChangeLog	Thu Jan 20 02:29:57 2011 -0500
@@ -1,3 +1,12 @@
+2011-01-20  John W. Eaton  <jwe@octave.org>
+
+	* gl-render.h, graphics.cc, gl-render.cc, graphics.h.in:
+	Update for backend -> graphics_toolkit change.
+
+	* DLD-FUNCTIONS/__init_fltk__.cc: Rename from fltk_backend.cc
+	Update for backend -> graphics_toolkit change.
+	* DLD-FUNCTIONS/module-files, Makefile.am: Update for renamed file.
+
 2011-01-19  Rik  <octave@nomad.inbox5.com>
 
 	* src/data.cc, src/input.cc, src/utils.cc: spellcheck docstrings.
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/DLD-FUNCTIONS/__init_fltk__.cc	Thu Jan 20 02:29:57 2011 -0500
@@ -0,0 +1,2124 @@
+/*
+
+Copyright (C) 2007-2011 Shai Ayal
+
+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/>.
+
+*/
+
+/*
+
+To initialize:
+
+  graphics_toolkit ("fltk");
+  plot (randn (1e3, 1));
+
+*/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#if defined (HAVE_FLTK)
+
+#include <map>
+#include <set>
+#include <sstream>
+#include <iostream>
+
+#include <FL/Fl.H>
+#include <FL/Fl_Box.H>
+#include <FL/Fl_Button.H>
+#include <FL/Fl_Choice.H>
+#include <Fl/Fl_File_Chooser.H>
+#include <FL/Fl_Gl_Window.H>
+#include <FL/Fl_Menu_Bar.H>
+#include <FL/Fl_Menu_Button.H>
+#include <FL/Fl_Output.H>
+#include <FL/Fl_Window.H>
+#include <FL/fl_ask.H>
+#include <FL/fl_draw.H>
+#include <FL/gl.h>
+
+#include "cmd-edit.h"
+#include "lo-ieee.h"
+
+#include "defun-dld.h"
+#include "error.h"
+#include "gl-render.h"
+#include "gl2ps-renderer.h"
+#include "graphics.h"
+#include "parse.h"
+#include "toplev.h"
+#include "variables.h"
+
+#define FLTK_GRAPHICS_TOOLKIT_NAME "fltk"
+
+// Give FLTK no more than 0.01 sec to do its stuff.
+static double fltk_maxtime = 1e-2;
+
+const char* help_text = "\
+Keyboard Shortcuts\n\
+a - autoscale\n\
+p - pan/zoom\n\
+r - rotate\n\
+g - toggle grid\n\
+\n\
+Mouse\n\
+left drag - pan\n\
+mouse wheel - zoom\n\
+right drag - rectangle zoom\n\
+left double click - autoscale\n\
+";
+
+class OpenGL_fltk : public Fl_Gl_Window
+{
+public:
+  OpenGL_fltk (int xx, int yy, int ww, int hh, double num)
+    : Fl_Gl_Window (xx, yy, ww, hh, 0), number (num), renderer (),
+      in_zoom (false), zoom_box (),  print_fid (-1)
+  {
+    // Ask for double buffering and a depth buffer.
+    mode (FL_DEPTH | FL_DOUBLE);
+  }
+
+  ~OpenGL_fltk (void) { }
+
+  void zoom (bool z) 
+  {
+    in_zoom = z;
+    if (! in_zoom)
+      hide_overlay ();
+  }
+
+  bool zoom (void) { return in_zoom; }
+  void set_zoom_box (const Matrix& zb) { zoom_box = zb; }
+  
+  void print (const int fid, const std::string& term)
+  {
+    print_fid  = fid;
+    print_term  = term;
+  }
+
+  void resize (int xx, int yy, int ww, int hh)
+  {
+    Fl_Gl_Window::resize (xx, yy, ww, hh);
+    setup_viewport (ww, hh);
+    redraw ();
+  }
+  
+private:
+  double number;
+  opengl_renderer renderer;
+  bool in_zoom;
+  // (x1,y1,x2,y2)
+  Matrix zoom_box;
+
+  int print_fid;
+  std::string print_term;
+
+  void setup_viewport (int ww, int hh)
+  {
+    glMatrixMode (GL_PROJECTION);
+    glLoadIdentity ();
+    glViewport (0, 0, ww, hh);
+  }
+
+  void draw (void)
+  {
+    if (! valid ())
+      {
+        valid (1);
+        setup_viewport (w (), h ());
+      }
+
+    if ( print_fid > 0 )
+      {
+        opengl_renderer *rend = new glps_renderer (print_fid, print_term);
+        rend->draw (gh_manager::lookup (number));
+        print_fid = -1;
+        delete rend;
+      }
+    else
+      {
+        renderer.draw (gh_manager::lookup (number));
+
+        if (zoom ())
+          overlay ();
+      }
+  }
+
+  void zoom_box_vertex (void)
+  {
+    glVertex2d (zoom_box(0), h () - zoom_box(1));
+    glVertex2d (zoom_box(0), h () - zoom_box(3));
+    glVertex2d (zoom_box(2), h () - zoom_box(3));
+    glVertex2d (zoom_box(2), h () - zoom_box(1));
+    glVertex2d (zoom_box(0), h () - zoom_box(1));
+  }
+ 
+  void overlay (void)
+  {
+    glPushMatrix ();
+
+    glMatrixMode (GL_MODELVIEW);
+    glLoadIdentity ();
+
+    glMatrixMode (GL_PROJECTION);
+    glLoadIdentity ();
+    gluOrtho2D (0.0, w (), 0.0, h ());
+
+    glPushAttrib (GL_DEPTH_BUFFER_BIT | GL_CURRENT_BIT);
+    glDisable (GL_DEPTH_TEST);
+
+    glBegin (GL_POLYGON);
+    glColor4f (0.45, 0.62, 0.81, 0.1);
+    zoom_box_vertex ();
+    glEnd ();
+
+    glBegin (GL_LINE_STRIP);
+    glLineWidth (1.5);
+    glColor4f (0.45, 0.62, 0.81, 0.9);
+    zoom_box_vertex ();
+    glEnd ();
+
+    glPopAttrib ();
+    glPopMatrix ();
+  }
+
+  int handle (int event)
+  {
+    int retval = Fl_Gl_Window::handle (event);
+
+    switch (event)
+      {
+      case FL_ENTER:
+        window ()->cursor (FL_CURSOR_CROSS);
+        return 1;
+
+      case FL_LEAVE:
+        window ()->cursor (FL_CURSOR_DEFAULT);
+        return 1;
+      }
+
+    return retval;
+  }
+};
+
+// Parameter controlling how fast we zoom when using the scrool wheel.
+static double wheel_zoom_speed = 0.05;
+// Parameter controlling the GUI mode.
+static enum { pan_zoom, rotate_zoom, none } gui_mode;
+
+void script_cb(Fl_Widget*, void* data)
+  {
+    static_cast<uimenu::properties*> (data)->execute_callback ();
+  }
+  
+
+class fltk_uimenu
+{
+public:
+  fltk_uimenu (int xx, int yy, int ww, int hh)
+    {
+      menubar = new
+        Fl_Menu_Bar(xx, yy, ww, hh);
+    }
+
+  int items_to_show (void)
+    {
+      //returns the number of visible menu items
+      int len = menubar->size ();
+      int n = 0;
+      for (int t = 0; t < len; t++ )
+        {
+          const Fl_Menu_Item *m = static_cast<const Fl_Menu_Item*>(&(menubar->menu ()[t]));
+          if ((m->label () != NULL) && m->visible ())
+            n++;
+        }
+
+      return n;
+    }
+
+  void show (void)
+    {
+      menubar->show ();
+    }
+
+  void hide (void)
+    {
+      menubar->hide ();
+    }
+
+   bool is_visible (void)
+    {
+      return menubar->visible ();
+    }
+
+  int find_index_by_name (std::string findname)
+    {
+      // This function is derived from Greg Ercolano's function
+      // int GetIndexByName(...), see:
+      // http://seriss.com/people/erco/fltk/#Menu_ChangeLabel
+      // He agreed via PM that it can be included in octave using GPLv3
+      // Kai Habel (14.10.2010)
+
+      std::string menupath;
+      for (int t = 0; t < menubar->size (); t++ )
+        {
+          Fl_Menu_Item *m = const_cast<Fl_Menu_Item*>(&(menubar->menu ()[t]));
+          if (m->submenu ())
+            {
+              // item has submenu
+              if (!menupath.empty ())
+                menupath += "/";
+              menupath += m->label ();
+
+              if (menupath.compare (findname) == 0 )
+                return (t);
+            }
+          else
+            {
+              // End of submenu? Pop back one level.
+              if (m->label () == NULL)
+                {
+                  std::size_t idx = menupath.find_last_of ("/");
+                  if (idx != std::string::npos)
+                    menupath.erase (idx);
+                  else
+                    menupath.clear ();
+                  continue;
+                }   
+              // Menu item?
+              std::string itempath = menupath;
+              if (!itempath.empty ())
+                itempath += "/";              
+              itempath += m->label ();
+
+              if (itempath.compare (findname) == 0)
+                return (t);
+            }
+        }
+      return (-1);
+    }
+  
+  Matrix find_uimenu_children (uimenu::properties& uimenup) const
+    {
+      Matrix uimenu_childs = uimenup.get_all_children ();
+      Matrix retval = do_find_uimenu_children (uimenu_childs);
+      return retval;
+    }
+
+  Matrix find_uimenu_children (figure::properties& figp) const
+    {
+      Matrix uimenu_childs = figp.get_all_children ();
+      Matrix retval = do_find_uimenu_children (uimenu_childs);
+      return retval;
+    }
+    
+  Matrix do_find_uimenu_children (Matrix uimenu_childs) const
+    {
+      octave_idx_type k = 0;
+      
+      
+      Matrix pos = Matrix (uimenu_childs.numel (), 1);
+      
+      for (octave_idx_type ii = 0; ii < uimenu_childs.numel (); ii++)
+      {
+        graphics_object kidgo = gh_manager::get_object (uimenu_childs (ii));
+        
+        if (kidgo.valid_object() && kidgo.isa ("uimenu"))
+          {
+            uimenu_childs(k) = uimenu_childs(ii);
+            pos(k++) =
+              dynamic_cast<uimenu::properties&> (kidgo.get_properties ()).get_position ();
+          }
+      }
+      
+      uimenu_childs.resize (k, 1);    
+      pos.resize (k, 1);
+      Matrix retval = Matrix (k, 1);
+      // Don't know if this is the best method to sort.
+      // Can we avoid the for loop?
+      Array<octave_idx_type> sidx = pos.sort_rows_idx (DESCENDING);
+      for (octave_idx_type ii = 0; ii < k; ii++)
+        retval(ii) = uimenu_childs (sidx(ii));
+       
+      return retval;
+    }
+    
+  void delete_entry(uimenu::properties& uimenup)
+    {
+      std::string fltk_label = uimenup.get_fltk_label ();
+      int idx = find_index_by_name (fltk_label.c_str ());
+
+      if (idx >= 0)
+        menubar->remove (idx);
+    }
+
+  void update_accelerator (uimenu::properties& uimenup)
+    {
+      std::string fltk_label = uimenup.get_fltk_label ();
+      if (!fltk_label.empty ())
+        {
+          Fl_Menu_Item* item = const_cast<Fl_Menu_Item*>(menubar->find_item (fltk_label.c_str ()));
+          if (item != NULL)
+            {
+              std::string acc = uimenup.get_accelerator ();
+              if (acc.length () > 0)
+                {
+                  int key = FL_CTRL + acc[0];
+                  item->shortcut (key);
+                }
+            }
+        }
+    }
+
+  void update_callback (uimenu::properties& uimenup)
+    {
+      std::string fltk_label = uimenup.get_fltk_label ();
+      if (!fltk_label.empty ())
+        {
+          Fl_Menu_Item* item = const_cast<Fl_Menu_Item*>(menubar->find_item (fltk_label.c_str ()));
+          if (item != NULL)
+            {
+              if (!uimenup.get_callback ().is_empty ())
+                item->callback(static_cast<Fl_Callback*>(script_cb), //callback
+                              static_cast<void*>(&uimenup));        //callback data
+              else
+                item->callback(NULL, static_cast<void*>(0));
+            }
+        }
+    }
+            
+  void update_enable (uimenu::properties& uimenup)
+    {
+      std::string fltk_label = uimenup.get_fltk_label ();
+      if (!fltk_label.empty ())
+        {
+          Fl_Menu_Item* item = const_cast<Fl_Menu_Item*>(menubar->find_item (fltk_label.c_str ()));
+          if (item != NULL)
+            {
+              if (uimenup.is_enable ())
+                item->activate ();
+              else
+                item->deactivate ();
+            }
+        }
+    }
+
+  void update_foregroundcolor (uimenu::properties& uimenup)
+    {
+      std::string fltk_label = uimenup.get_fltk_label ();
+      if (!fltk_label.empty ())
+        {
+          Fl_Menu_Item* item = const_cast<Fl_Menu_Item*>(menubar->find_item (fltk_label.c_str ()));
+          if (item != NULL)
+            {
+              Matrix rgb = uimenup.get_foregroundcolor_rgb ();
+              item->labelcolor(fl_rgb_color(static_cast<uchar>(floor (rgb(0)*255)),
+                                            static_cast<uchar>(floor (rgb(1)*255)),
+                                            static_cast<uchar>(floor (rgb(2)*255))));
+            }
+        }
+    }
+
+  void update_seperator (uimenu::properties& uimenup)
+    {
+      // Matlab places the separator before the current
+      // menu entry, while fltk places it after. So we need to find
+      // the previous item in this menu/submenu. (Kai)
+      std::string fltk_label = uimenup.get_fltk_label ();
+      if (!fltk_label.empty ())
+        {
+          int itemflags = 0, idx;
+          int curr_idx = find_index_by_name(fltk_label.c_str ());
+
+          for (idx = curr_idx - 1; idx >= 0; idx--)
+            { 
+              Fl_Menu_Item* item = const_cast<Fl_Menu_Item*>(&menubar->menu () [idx]);
+              itemflags = item->flags;
+              if (item->label () != NULL)
+                break;
+            }
+
+          if ((idx >= 0) && (idx < menubar->size ()))
+            {
+              if (uimenup.is_separator ())
+                {
+                  if (idx >= 0 && !(itemflags & FL_SUBMENU))
+                    menubar->mode (idx, itemflags | FL_MENU_DIVIDER);
+                }
+              else
+                menubar->mode (idx, itemflags & (~FL_MENU_DIVIDER));
+            }
+        }
+    }
+
+  void update_visible (uimenu::properties& uimenup)
+    {
+      std::string fltk_label = uimenup.get_fltk_label ();
+      if (!fltk_label.empty ())
+        {
+          Fl_Menu_Item* item = const_cast<Fl_Menu_Item*>(menubar->find_item (fltk_label.c_str ()));
+          if (item != NULL)
+            {
+              if (uimenup.is_visible ())
+                item->show ();
+              else
+                item->hide ();
+            }
+        }
+    }
+    
+  void add_entry (uimenu::properties& uimenup)
+    {
+
+      std::string fltk_label = uimenup.get_fltk_label ();
+
+      if (!fltk_label.empty ())
+        {
+          bool item_added = false;
+          do
+            {  
+              const Fl_Menu_Item* item = menubar->find_item(fltk_label.c_str ());
+              
+              if (item == NULL)
+                {
+                  Matrix uimenu_ch = find_uimenu_children (uimenup);
+                  int len = uimenu_ch.numel ();
+                  int flags = 0;
+                  if (len > 0) 
+                    flags = FL_SUBMENU;
+                  if ((len == 0) && (uimenup.is_checked ()))
+                    flags += FL_MENU_TOGGLE + FL_MENU_VALUE;
+                  menubar->add(fltk_label.c_str (), 0, 0, 0, flags);      
+                  item_added = true;
+                }
+              else
+                {
+                  //avoid duplicate menulabels
+                  std::size_t idx1 = fltk_label.find_last_of ("(");
+                  std::size_t idx2 = fltk_label.find_last_of (")");
+                  int len = idx2 - idx1;
+                  int val = 1;
+                  if (len > 0)
+                    {
+                      std::string valstr = fltk_label.substr (idx1 + 1, len - 1);
+                      fltk_label.erase(idx1, len + 1);
+                      val = atoi (valstr.c_str ());
+                      if ((val > 0) && (val < 99))
+                        val++;
+                    }
+                  std::ostringstream valstream;
+                  valstream << val;
+                  fltk_label += "(" + valstream.str () + ")";
+                }
+            }
+          while (!item_added);
+          uimenup.set_fltk_label (fltk_label);
+        }
+    }  
+
+  void add_to_menu (uimenu::properties& uimenup)
+    {
+      Matrix kids = find_uimenu_children (uimenup);
+      int len = kids.length ();
+      std::string fltk_label = uimenup.get_fltk_label ();
+      
+      add_entry (uimenup);
+      update_foregroundcolor (uimenup);
+      update_callback (uimenup);
+      update_accelerator (uimenup);
+      update_enable (uimenup);
+      update_visible (uimenup);
+      update_seperator (uimenup);
+      
+      for (octave_idx_type ii = 0; ii < len; ii++)
+        {
+          graphics_object kgo = gh_manager::get_object (kids (len - (ii + 1)));
+          if (kgo.valid_object ())
+            {
+              uimenu::properties& kprop = dynamic_cast<uimenu::properties&>(kgo.get_properties ());
+              add_to_menu (kprop);
+            }
+        }
+    }
+
+  void add_to_menu (figure::properties& figp)
+    {
+      Matrix kids = find_uimenu_children (figp);
+      int len = kids.length ();
+      menubar->clear ();      
+      for (octave_idx_type ii = 0; ii < len; ii++)
+        {
+          graphics_object kgo = gh_manager::get_object (kids (len - (ii + 1)));
+
+          if (kgo.valid_object ())
+            {
+              uimenu::properties& kprop = dynamic_cast<uimenu::properties&>(kgo.get_properties ());
+              add_to_menu (kprop);
+            }
+        }
+    }
+
+  template <class T_prop>
+  void remove_from_menu (T_prop& prop)
+    {
+      Matrix kids;
+      std::string type = prop.get_type ();
+      kids = find_uimenu_children (prop);    
+      int len = kids.length ();
+
+      for (octave_idx_type ii = 0; ii < len; ii++)
+        {
+          graphics_object kgo = gh_manager::get_object (kids (len - (ii + 1)));
+
+          if (kgo.valid_object ())
+            {
+              uimenu::properties kprop = dynamic_cast<uimenu::properties&>(kgo.get_properties ());
+              remove_from_menu (kprop);
+            }
+        }
+
+      if (type.compare("uimenu") == 0)
+        delete_entry(dynamic_cast<uimenu::properties&>(prop));
+      else if (type.compare("figure") == 0)
+        menubar->clear ();
+    }
+
+  ~fltk_uimenu()
+    {
+      delete menubar;
+    }
+    
+private:
+  Fl_Menu_Bar* menubar;
+};
+
+class plot_window : public Fl_Window
+{
+  friend class fltk_uimenu;
+public:
+  plot_window (int xx, int yy, int ww, int hh, figure::properties& xfp)
+    : Fl_Window (xx, yy, ww, hh, "octave"), window_label (), shift (0),
+      ndim (2), fp (xfp), canvas (0), autoscale (0), togglegrid (0),
+      panzoom (0), rotate (0), help (0), status (0)
+  {
+    callback (window_close, static_cast<void*> (this));
+
+    begin ();
+    {
+      
+      uimenu = new
+        fltk_uimenu(0, 0, ww, menu_h);
+      uimenu->hide ();
+      
+      canvas = new
+        OpenGL_fltk (0, 0, ww , hh - status_h, number ());
+
+      bottom = new 
+        Fl_Box (0, 
+                hh - status_h, 
+                ww, 
+                status_h);
+      bottom->box(FL_FLAT_BOX);
+
+      ndim = calc_dimensions (gh_manager::get_object (fp.get___myhandle__ ()));
+
+      autoscale = new
+        Fl_Button (0,
+                   hh - status_h,
+                   status_h,
+                   status_h,
+                   "A");
+      autoscale->callback (button_callback, static_cast<void*> (this));
+      autoscale->tooltip ("Autoscale");
+
+      togglegrid = new
+        Fl_Button (status_h,
+                   hh - status_h,
+                   status_h,
+                   status_h,
+                   "G");
+      togglegrid->callback (button_callback, static_cast<void*> (this));
+      togglegrid->tooltip ("Toggle Grid");
+
+      panzoom = new
+        Fl_Button (2 * status_h,
+                   hh - status_h,
+                   status_h,
+                   status_h,
+                   "P");
+      panzoom->callback (button_callback, static_cast<void*> (this));
+      panzoom->tooltip ("Mouse Pan/Zoom");
+
+      rotate = new
+        Fl_Button (3 * status_h,
+                   hh - status_h,
+                   status_h,
+                   status_h,
+                   "R");
+      rotate->callback (button_callback, static_cast<void*> (this));
+      rotate->tooltip ("Mouse Rotate");
+
+      if (ndim == 2)
+        rotate->deactivate ();
+
+      help = new
+        Fl_Button (4 * status_h,
+                   hh - status_h,
+                   status_h,
+                   status_h,
+                   "?");
+      help->callback (button_callback, static_cast<void*> (this));
+      help->tooltip ("Help");
+
+      status = new
+        Fl_Output (5 * status_h,
+                   hh - status_h,
+                   ww > 2*status_h ? ww - status_h : 0,
+                   status_h, "");
+
+      status->textcolor (FL_BLACK);
+      status->color (FL_GRAY);
+      status->textfont (FL_COURIER);
+      status->textsize (10);
+      status->box (FL_ENGRAVED_BOX);
+
+      // This allows us to have a valid OpenGL context right away.
+      canvas->mode (FL_DEPTH | FL_DOUBLE );
+      if (fp.is_visible ())
+        {
+          show ();
+          if (fp.get_currentaxes ().ok())
+            show_canvas ();
+          else
+            hide_canvas ();
+        }
+    }
+    end ();
+
+    status->show ();
+    autoscale->show ();
+    togglegrid->show ();
+    panzoom->show ();
+    rotate->show ();
+
+    set_name ();
+    resizable (canvas);
+    size_range (4*status_h, 2*status_h);
+    gui_mode = (ndim == 3 ? rotate_zoom : pan_zoom);
+    uimenu->add_to_menu (fp);
+    if (uimenu->items_to_show ())
+      show_menubar ();
+    else
+      hide_menubar ();
+  }
+
+  ~plot_window (void)
+  {
+    canvas->hide ();
+    status->hide ();
+    uimenu->hide ();
+    this->hide ();
+    delete canvas;
+    delete status;
+    delete uimenu;
+  }
+
+  // FIXME -- this could change.
+  double number (void) { return fp.get___myhandle__ ().value (); }
+
+  void print (const int fid, const std::string& term)
+  {
+    canvas->print (fid, term);
+
+    // Print immediately so the output file will exist when the drawnow
+    // command is done.
+    mark_modified ();
+    Fl::wait (fltk_maxtime);
+  }
+
+  void show_menubar (void)
+  {
+    int dm = menu_h;
+    if (uimenu->is_visible ())
+      dm = 0;
+    canvas->resize (canvas->x (),
+                    canvas->y () + dm,
+                    canvas->w (),
+                    canvas->h () - dm);
+    uimenu->show ();
+    mark_modified ();
+  }
+  
+  void hide_menubar (void)
+  {
+    int dm = menu_h;
+    if (!uimenu->is_visible ())
+      dm = 0;
+    canvas->resize (canvas->x (),
+                    canvas->y () - dm,
+                    canvas->w (),
+                    canvas->h () + dm);
+    uimenu->hide ();
+    mark_modified (); 
+  }
+  
+  void uimenu_update(graphics_handle gh, int id)
+  {
+    graphics_object uimenu_obj = gh_manager::get_object (gh);
+    
+    if (uimenu_obj.valid_object () && uimenu_obj.isa ("uimenu"))
+      {
+        uimenu::properties& uimenup =
+          dynamic_cast<uimenu::properties&> (uimenu_obj.get_properties ());
+        std::string fltk_label = uimenup.get_fltk_label();
+        graphics_object fig = uimenu_obj.get_ancestor("figure");
+        figure::properties& figp =
+          dynamic_cast<figure::properties&> (fig.get_properties ());
+        
+        switch(id)
+          {
+            case base_properties::ID_BEINGDELETED:
+              uimenu->remove_from_menu (uimenup);
+              break;
+            case base_properties::ID_VISIBLE:
+              uimenu->update_visible (uimenup);
+              break;
+            case uimenu::properties::ID_ACCELERATOR:
+              uimenu->update_accelerator (uimenup);
+              break;
+            case uimenu::properties::ID_CALLBACK:
+              uimenu->update_callback (uimenup);
+              break;
+            case uimenu::properties::ID_CHECKED:
+              uimenu->add_to_menu (figp);//rebuilding entire menu
+              break;
+            case uimenu::properties::ID_ENABLE:
+              uimenu->update_enable (uimenup);
+              break;
+            case uimenu::properties::ID_FOREGROUNDCOLOR:
+              uimenu->update_foregroundcolor (uimenup);
+              break;
+            case uimenu::properties::ID_LABEL:
+              uimenu->add_to_menu (figp);//rebuilding entire menu
+              break;
+            case uimenu::properties::ID_POSITION:
+              uimenu->add_to_menu (figp);//rebuilding entire menu
+              break;
+            case uimenu::properties::ID_SEPARATOR:
+              uimenu->update_seperator (uimenup);
+              break;
+          }
+          
+          if (uimenu->items_to_show ())
+            show_menubar ();
+          else
+            hide_menubar ();
+          
+          mark_modified();
+      }
+  }
+
+  void show_canvas (void)
+  {
+    canvas->show ();
+    canvas->make_current ();
+  }
+  
+  void hide_canvas (void)
+  {
+    canvas->hide ();
+  }
+  
+  void mark_modified (void)
+  {
+    damage (FL_DAMAGE_ALL);
+    canvas->damage (FL_DAMAGE_ALL);
+    ndim = calc_dimensions (gh_manager::get_object (fp.get___myhandle__ ()));
+
+    if (ndim == 3)
+      rotate->activate ();
+    else if ((ndim == 2) &&  (gui_mode == rotate_zoom))
+      {
+        rotate->deactivate ();
+        gui_mode = pan_zoom;
+      }
+  }
+
+  void set_name (void)
+  {
+    window_label = fp.get_title ();
+    label (window_label.c_str ());
+  }
+
+private:
+  // window name -- this must exists for the duration of the window's
+  // life
+  std::string window_label;
+
+  // Mod keys status
+  int shift;
+
+  // Number of dimensions, 2 or 3.
+  int ndim;
+
+  // Figure properties.
+  figure::properties& fp;
+
+  // Status area height.
+  static const int status_h = 20;
+
+  // Menu height
+  static const int menu_h = 20;
+
+  // Window callback.
+  static void window_close (Fl_Widget*, void* data)
+  {
+    octave_value_list args;
+    args(0) = static_cast<plot_window*> (data)->number ();
+    feval ("close", args);
+  }
+
+  // Button callbacks.
+  static void button_callback (Fl_Widget* ww, void* data)
+  {
+    static_cast<plot_window*> (data)->button_press (ww, data);
+  }
+
+  void button_press (Fl_Widget* widg, void*)
+  {
+    if (widg == autoscale)
+      axis_auto ();
+
+    if (widg == togglegrid)
+      toggle_grid ();
+    
+    if (widg == panzoom)
+      gui_mode = pan_zoom;
+    
+    if (widg == rotate && ndim == 3)
+      gui_mode = rotate_zoom;
+
+    if (widg == help)
+      fl_message ("%s", help_text);
+  }
+
+  fltk_uimenu* uimenu;
+  OpenGL_fltk* canvas;
+  Fl_Box*    bottom;
+  Fl_Button* autoscale;
+  Fl_Button* togglegrid;
+  Fl_Button* panzoom;
+  Fl_Button* rotate;
+  Fl_Button* help;
+  Fl_Output* status;
+
+  void axis_auto (void)
+  {
+    octave_value_list args;
+    args(0) = fp.get_currentaxes ().as_octave_value ();
+    args(1) = "auto";
+    feval ("axis", args);
+    mark_modified ();
+  }
+
+  void toggle_grid (void)
+  {
+    octave_value_list args;
+    if (fp.get_currentaxes ().ok ())
+      args(0) = fp.get_currentaxes ().as_octave_value ();
+    
+    feval ("grid", args);
+    mark_modified ();
+  }
+  
+  void pixel2pos 
+  (graphics_handle ax, int px, int py, double& xx, double& yy) const
+  {
+    pixel2pos ( gh_manager::get_object (ax), px, py, xx, yy);
+  }
+
+  void pixel2pos 
+  (graphics_object ax, int px, int py, double& xx, double& yy) const
+  {
+    if (ax && ax.isa ("axes"))
+      {
+        axes::properties& ap =
+          dynamic_cast<axes::properties&> (ax.get_properties ());
+        ColumnVector pp = ap.pixel2coord (px, py);
+        xx = pp(0);
+        yy = pp(1);
+      }
+  }
+
+  graphics_handle pixel2axes_or_ca (int px, int py )
+  {
+    Matrix kids = fp.get_children ();
+    int len = kids.length ();
+
+    for (int k = 0; k < len; k++)
+      {
+        graphics_handle hnd = gh_manager::lookup (kids(k));
+
+        if (hnd.ok ())
+          {
+            graphics_object kid = gh_manager::get_object (hnd);
+
+            if (kid.valid_object () && kid.isa ("axes"))
+              {
+                Matrix bb = kid.get_properties ().get_boundingbox (true);
+
+                if (bb(0) <= px && px < (bb(0)+bb(2))
+                    && bb(1) <= py && py < (bb(1)+bb(3)))
+                  {
+                    return hnd;
+                  }
+              }
+          }
+      }
+    return fp.get_currentaxes ();
+  }
+  
+  void pixel2status (graphics_handle ax, int px0, int py0,
+                     int px1 = -1, int py1 = -1)
+  {
+    pixel2status (gh_manager::get_object (ax), px0, py0, px1, py1);
+  }
+
+  void pixel2status (graphics_object ax, int px0, int py0,
+                     int px1 = -1, int py1 = -1)
+  {
+    double x0, y0, x1, y1;
+    std::stringstream cbuf;
+    cbuf.precision (4);
+    cbuf.width (6);
+    pixel2pos (ax, px0, py0, x0, y0);
+    cbuf << "[" << x0 << ", " << y0 << "]";
+    if (px1 >= 0)
+      {
+        pixel2pos (ax, px1, py1, x1, y1);
+        cbuf << " -> ["<< x1 << ", " << y1 << "]";
+      }
+
+    status->value (cbuf.str ().c_str ());
+    status->redraw ();
+  }
+
+  void view2status (graphics_object ax)
+  {
+     if (ax && ax.isa ("axes"))
+       {
+         axes::properties& ap = 
+           dynamic_cast<axes::properties&> (ax.get_properties ());
+         std::stringstream cbuf;
+         cbuf.precision (4);
+         cbuf.width (6);
+         Matrix v (1,2,0);
+         v = ap.get("view").matrix_value();
+         cbuf << "[azimuth: " << v(0) << ", elevation: " << v(1) << "]";
+    
+         status->value (cbuf.str ().c_str ());
+         status->redraw ();
+       }
+  }
+  
+  void set_currentpoint (int px, int py)
+  {
+    if (!fp.is_beingdeleted ())
+      {
+        Matrix pos (1,2,0);
+        pos(0) = px;
+        pos(1) = h () - status_h - menu_h - py;
+        fp.set_currentpoint (pos);
+      }
+  }
+
+  void set_axes_currentpoint (graphics_object ax, int px, int py)
+  {
+    if (ax.valid_object ())
+      {
+        axes::properties& ap = 
+          dynamic_cast<axes::properties&> (ax.get_properties ());
+    
+        double xx, yy;
+        pixel2pos (ax, px, py, xx, yy);
+
+        Matrix pos (2,3,0);
+        pos(0,0) = xx;
+        pos(1,0) = yy;
+        pos(0,1) = xx;
+        pos(1,1) = yy;
+
+        ap.set_currentpoint (pos);
+      }
+  }
+
+  int key2shift (int key)
+  {
+    if (key == FL_Shift_L || key == FL_Shift_R)
+      return FL_SHIFT;
+
+    if (key == FL_Control_L || key == FL_Control_R)
+      return FL_CTRL;
+
+    if (key == FL_Alt_L || key == FL_Alt_R)
+      return FL_ALT;
+
+    if (key == FL_Meta_L || key == FL_Meta_R)
+      return FL_META;
+
+    return 0;
+  }
+
+  int key2ascii (int key)
+  {
+    if (key < 256) return key;
+    if (key == FL_Tab) return '\t';
+    if (key == FL_Enter) return 0x0a;
+    if (key == FL_BackSpace) return 0x08;
+    if (key == FL_Escape) return 0x1b;
+
+    return 0;
+  }
+
+  Cell modifier2cell ()
+  {
+    string_vector mod;
+    
+    if (shift & FL_SHIFT)
+      mod.append (std::string ("shift"));
+    if (shift & FL_CTRL)
+      mod.append (std::string ("control"));
+    if (shift & FL_ALT || shift & FL_META)
+      mod.append (std::string ("alt"));
+
+    return Cell (mod);
+  }
+
+  void resize (int xx,int yy,int ww,int hh)
+  {
+    Fl_Window::resize (xx, yy, ww, hh);
+
+    Matrix pos (1,4,0);
+    pos(0) = xx;
+    pos(1) = yy;
+    pos(2) = ww;
+    pos(3) = hh - status_h - menu_h;
+
+    fp.set_position (pos);
+  }
+
+  void draw (void)
+  {
+    Matrix pos = fp.get_position ().matrix_value ();
+    Fl_Window::resize (pos(0), pos(1) , pos(2), pos(3) + status_h + menu_h);
+
+    return Fl_Window::draw ();
+  }
+
+  int handle (int event)
+  {
+    static int px0,py0;
+    static graphics_object ax0;
+
+    graphics_handle gh;
+
+    graphics_object fig = gh_manager::get_object (fp.get___myhandle__ ());
+    int retval = Fl_Window::handle (event);
+
+    // We only handle events which are in the canvas area.
+    if (!Fl::event_inside(canvas))
+      return retval;
+
+    if (!fp.is_beingdeleted ())
+      {
+        switch (event)
+          {
+          case FL_KEYDOWN:
+            {
+              int key = Fl::event_key ();
+
+              shift |= key2shift (key);
+              int key_a = key2ascii (key);
+              if (key_a && fp.get_keypressfcn ().is_defined ()) 
+                {
+                  Octave_map evt;
+                  evt.assign ("Character", octave_value (key_a));
+                  evt.assign ("Key", octave_value (std::tolower (key_a)));
+                  evt.assign ("Modifier", octave_value (modifier2cell ()));
+                  fp.execute_keypressfcn (evt);
+                }
+              switch (key)
+                {
+                case 'a':
+                case 'A':
+                  axis_auto ();
+                break;
+
+                case 'g':
+                case 'G':
+                  toggle_grid ();
+                break;
+
+                case 'p':
+                case 'P':
+                  gui_mode = pan_zoom;
+                break;
+
+                case 'r':
+                case 'R':
+                  gui_mode = rotate_zoom;
+                break;
+                }
+            }
+            break;
+
+          case FL_KEYUP:
+            {
+              int key = Fl::event_key ();
+
+              shift &= (~key2shift (key));
+              int key_a = key2ascii (key);
+              if (key_a && fp.get_keyreleasefcn ().is_defined ())
+                {
+                  Octave_map evt;
+                  evt.assign ("Character", octave_value (key_a));
+                  evt.assign ("Key", octave_value (std::tolower (key_a)));
+                  evt.assign ("Modifier", octave_value (modifier2cell ()));
+                  fp.execute_keyreleasefcn (evt);
+                }
+            }
+            break;
+
+          case FL_MOVE:
+            pixel2status (pixel2axes_or_ca (Fl::event_x (), Fl::event_y ()),
+                          Fl::event_x (), Fl::event_y ());
+            break;
+
+          case FL_PUSH:
+            px0 = Fl::event_x ();
+            py0 = Fl::event_y ();
+
+            set_currentpoint (Fl::event_x (), Fl::event_y ());
+            
+            gh = pixel2axes_or_ca (px0, py0);
+
+            if (gh.ok ())
+              {
+                ax0 = gh_manager::get_object (gh);
+                set_axes_currentpoint (ax0, px0, py0);
+              }
+              
+            fp.execute_windowbuttondownfcn ();
+
+            if (Fl::event_button () == 1 || Fl::event_button () == 3)
+              return 1;
+
+            break;
+
+          case FL_DRAG:
+            if (fp.get_windowbuttonmotionfcn ().is_defined ())
+              {
+                set_currentpoint (Fl::event_x (), Fl::event_y ());
+                fp.execute_windowbuttonmotionfcn ();
+              }
+            
+            if (Fl::event_button () == 1)
+              {
+                if (ax0 && ax0.isa ("axes"))
+                  {
+                    if (gui_mode == pan_zoom)
+                      pixel2status (ax0, px0, py0, Fl::event_x (), Fl::event_y ());
+                    else
+                      view2status (ax0);
+                    axes::properties& ap = 
+                      dynamic_cast<axes::properties&> (ax0.get_properties ());
+                  
+                    double x0, y0, x1, y1;
+                    Matrix pos = fp.get_position ().matrix_value ();
+                    pixel2pos (ax0, px0, py0, x0, y0);
+                    pixel2pos (ax0, Fl::event_x (), Fl::event_y (), x1, y1);
+                    
+                    if (gui_mode == pan_zoom)
+                      ap.translate_view (x0 - x1, y0 - y1);
+                    else if (gui_mode == rotate_zoom)
+                      {
+                        double daz, del;
+                        daz = (Fl::event_x () - px0) / pos(2) * 360;
+                        del = (Fl::event_y () - py0) / pos(3) * 360;
+                        ap.rotate_view (del, daz);
+                      }
+
+                    px0 = Fl::event_x ();
+                    py0 = Fl::event_y ();
+                    mark_modified ();
+                  }
+                return 1;
+              }
+            else if (Fl::event_button () == 3)
+              {
+                pixel2status (ax0, px0, py0, Fl::event_x (), Fl::event_y ());
+                Matrix zoom_box (1,4,0);
+                zoom_box (0) = px0;
+                zoom_box (1) = py0;
+                zoom_box (2) =  Fl::event_x ();
+                zoom_box (3) =  Fl::event_y ();
+                canvas->set_zoom_box (zoom_box);
+                canvas->zoom (true);
+                canvas->redraw ();
+              }
+
+            break;
+
+          case FL_MOUSEWHEEL:
+            {
+              graphics_object ax = 
+                gh_manager::get_object (pixel2axes_or_ca (Fl::event_x (), 
+                                                          Fl::event_y ()));                                                                      
+              if (ax && ax.isa ("axes"))
+                {
+                  axes::properties& ap = 
+                    dynamic_cast<axes::properties&> (ax.get_properties ());
+                  
+                  // Determine if we're zooming in or out.
+                  const double factor = 
+                    (Fl::event_dy () > 0) ? 1.0 + wheel_zoom_speed : 1.0 - wheel_zoom_speed;
+                  
+                  // Get the point we're zooming about.
+                  double x1, y1;
+                  pixel2pos (ax, Fl::event_x (), Fl::event_y (), x1, y1);
+                  
+                  ap.zoom_about_point (x1, y1, factor, false);
+                  mark_modified ();
+                }
+            }
+          return 1;
+
+          case FL_RELEASE:
+            if (fp.get_windowbuttonupfcn ().is_defined ())
+              {
+                set_currentpoint (Fl::event_x (), Fl::event_y ());
+                fp.execute_windowbuttonupfcn ();
+              }
+          
+            if (Fl::event_button () == 1)
+              {
+                if ( Fl::event_clicks () == 1)
+                  {
+                    if (ax0 && ax0.isa ("axes"))
+                      {
+                        axes::properties& ap =
+                          dynamic_cast<axes::properties&> (ax0.get_properties ());
+                        ap.set_xlimmode("auto");
+                        ap.set_ylimmode("auto");
+                        ap.set_zlimmode("auto");
+                        mark_modified ();
+                      }
+                  }
+              }
+            if (Fl::event_button () == 3)
+              {
+                // End of drag -- zoom.
+                if (canvas->zoom ())
+                  {
+                    canvas->zoom (false);
+                    double x0,y0,x1,y1;
+                    if (ax0 && ax0.isa ("axes"))
+                      {
+                        axes::properties& ap =
+                          dynamic_cast<axes::properties&> (ax0.get_properties ());
+                        pixel2pos (ax0, px0, py0, x0, y0);
+                        pixel2pos (ax0, Fl::event_x (), Fl::event_y (), x1, y1);
+                        Matrix xl (1,2,0);
+                        Matrix yl (1,2,0);
+                        if (x0 < x1)
+                          {
+                            xl(0) = x0;
+                            xl(1) = x1;
+                          }
+                        else
+                          {
+                            xl(0) = x1;
+                            xl(1) = x0;
+                          }
+                        if (y0 < y1)
+                          {
+                            yl(0) = y0;
+                            yl(1) = y1;
+                          }
+                        else
+                          {
+                            yl(0) = y1;
+                            yl(1) = y0;
+                          }
+                        ap.zoom (xl, yl);
+                        mark_modified ();
+                      }
+                  }
+              }
+            break;
+          }
+      }
+
+    return retval;
+  }
+};
+
+class figure_manager
+{
+public:
+
+  static bool instance_ok (void)
+  {
+    bool retval = true;
+
+    if (! instance)
+      instance = new figure_manager ();
+
+    if (! instance)
+      {
+        ::error ("unable to create figure_manager object!");
+
+        retval = false;
+      }
+
+    return retval;
+  }
+
+  ~figure_manager (void)
+  {
+    close_all ();
+  }
+
+  static void close_all (void)
+  {
+    if (instance_ok ())
+      instance->do_close_all ();
+  }
+
+  static void new_window (figure::properties& fp)
+  {
+    if (instance_ok ())
+      instance->do_new_window (fp);
+  }
+
+  static void delete_window (int idx)
+  {
+    if (instance_ok ())
+      instance->do_delete_window (idx);
+  }
+
+  static void delete_window (std::string idx_str)
+  {
+    delete_window (str2idx (idx_str));
+  }
+
+  static void toggle_window_visibility (int idx, bool is_visible)
+  {
+    if (instance_ok ())
+      instance->do_toggle_window_visibility (idx, is_visible);
+  }
+
+  static void toggle_window_visibility (std::string idx_str, bool is_visible)
+  {
+    toggle_window_visibility (str2idx (idx_str), is_visible);
+  }
+
+  static void mark_modified (int idx)
+  {
+    if (instance_ok ())
+      instance->do_mark_modified (idx);
+  }
+
+  static void mark_modified (const graphics_handle& gh)
+  {
+    mark_modified (hnd2idx (gh));
+  }
+
+  static void set_name (int idx)
+  {
+    if (instance_ok ())
+      instance->do_set_name (idx);
+  }
+
+  static void set_name (std::string idx_str)
+  {
+    set_name (str2idx (idx_str));
+  }
+
+  static Matrix get_size (int idx)
+  {
+    return instance_ok () ? instance->do_get_size (idx) : Matrix ();
+  }
+
+  static Matrix get_size (const graphics_handle& gh)
+  {
+    return get_size (hnd2idx (gh));
+  }
+
+  static void print (const graphics_handle& gh , const int fid,  const std::string& term)
+  {
+    if (instance_ok ())
+      instance->do_print (hnd2idx(gh), fid, term);
+  }
+  
+  static void uimenu_update (const graphics_handle& figh, const graphics_handle& uimenuh, const int id)
+  {
+    if (instance_ok ())
+      instance->do_uimenu_update (hnd2idx(figh), uimenuh, id);
+  }
+  
+  static void update_canvas (const graphics_handle& gh, const graphics_handle& ca)
+  {
+    if (instance_ok ())
+      instance->do_update_canvas (hnd2idx(gh), ca);
+  }
+  
+  static void toggle_menubar_visibility (int fig_idx, bool menubar_is_figure)
+  {
+    if (instance_ok ())
+      instance->do_toggle_menubar_visibility (fig_idx, menubar_is_figure);
+  }
+
+  static void toggle_menubar_visibility (std::string fig_idx_str, bool menubar_is_figure)
+  {
+    toggle_menubar_visibility (str2idx (fig_idx_str), menubar_is_figure);
+  }
+  
+private:
+
+  static figure_manager *instance;
+
+  figure_manager (void) { }
+
+  // No copying!
+  figure_manager (const figure_manager&);
+  figure_manager& operator = (const figure_manager&);
+
+  // Singelton -- hide all of the above.
+
+  static int curr_index;
+  typedef std::map<int, plot_window*> window_map;
+  typedef window_map::iterator wm_iterator;;
+  window_map windows;
+
+  static std::string fltk_idx_header;
+
+  void do_close_all (void)
+  {
+    wm_iterator win;
+    for (win = windows.begin (); win != windows.end (); win++)
+      delete win->second;
+    windows.clear ();
+  }
+
+  void do_new_window (figure::properties& fp)
+  {
+    int x, y, w, h;
+
+    int idx = figprops2idx (fp);
+    if (idx >= 0 && windows.find (idx) == windows.end ())
+      {
+        default_size (x, y, w, h);
+        idx2figprops (curr_index , fp);
+        windows[curr_index++] = new plot_window (x, y, w, h, fp);
+      }
+  }
+
+  void do_delete_window (int idx)
+  {
+    wm_iterator win;
+    if ((win = windows.find (idx)) != windows.end ())
+      {
+        delete win->second;
+        windows.erase (win);
+      }
+  }
+
+  void do_toggle_window_visibility (int idx, bool is_visible)
+  {
+    wm_iterator win;
+    if ((win = windows.find (idx)) != windows.end ())
+      {
+        if (is_visible)
+          win->second->show ();
+        else
+          win->second->hide ();
+
+        win->second->redraw ();
+      }
+  }
+
+  void do_toggle_menubar_visibility (int fig_idx, bool menubar_is_figure)
+  {
+    wm_iterator win;
+    if ((win = windows.find (fig_idx)) != windows.end ())
+      {
+	if (menubar_is_figure)
+          win->second->show_menubar ();
+        else
+          win->second->hide_menubar ();
+	
+        win->second->redraw ();
+      }
+  }
+  
+  void do_mark_modified (int idx)
+  {
+    wm_iterator win;
+    if ((win = windows.find (idx)) != windows.end ())
+      {
+        win->second->mark_modified ();
+      }
+  }
+
+  void do_set_name (int idx)
+  {
+    wm_iterator win;
+    if ((win = windows.find (idx)) != windows.end ())
+      {
+        win->second->set_name ();
+      }
+  }
+
+  Matrix do_get_size (int idx)
+  {
+    Matrix sz (1, 2, 0.0);
+
+    wm_iterator win;
+    if ((win = windows.find (idx)) != windows.end ())
+      {
+        sz(0) = win->second->w ();
+        sz(1) = win->second->h ();
+      }
+
+    return sz;
+  }
+
+  void do_print (int idx, const int fid,  const std::string& term)
+  {
+    wm_iterator win;
+    if ((win = windows.find (idx)) != windows.end ())
+      {
+        win->second->print (fid, term);
+      }
+  }
+
+  void do_uimenu_update (int idx, graphics_handle gh, int id)
+  {
+    wm_iterator win;
+    if ((win = windows.find (idx)) != windows.end ())
+      {
+        win->second->uimenu_update (gh, id);
+      }
+  }
+  
+  void do_update_canvas (int idx, graphics_handle ca)
+  {
+    wm_iterator win;
+    if ((win = windows.find (idx)) != windows.end ())
+      {
+        if (ca.ok ())
+          win->second->show_canvas ();
+        else
+          win->second->hide_canvas ();
+      }
+  }
+  
+  
+  // FIXME -- default size should be configurable.
+  void default_size (int& x, int& y, int& w, int& h)
+  {
+    x = 0;
+    y = 0;
+    w = 640;
+    h = 480;
+  }
+
+  static int str2idx (const caseless_str clstr)
+  {
+    int ind;
+    if (clstr.find (fltk_idx_header,0) == 0)
+      {
+        std::istringstream istr (clstr.substr (fltk_idx_header.size ()));
+        if (istr >> ind)
+          return ind;
+      }
+    error ("figure_manager: could not recognize fltk index");
+    return -1;
+  }
+
+  void idx2figprops (int idx, figure::properties& fp)
+  {
+    std::ostringstream ind_str;
+    ind_str << fltk_idx_header << idx;
+    fp.set___plot_stream__ (ind_str.str ());
+  }
+
+  static int figprops2idx (const figure::properties& fp)
+  {
+    if (fp.get___graphics_toolkit__ () == FLTK_GRAPHICS_TOOLKIT_NAME)
+      {
+        octave_value ps = fp.get___plot_stream__ ();
+        if (ps.is_string ())
+          return str2idx (ps.string_value ());
+        else
+          return 0;
+      }
+    error ("figure_manager: figure is not fltk");
+    return -1;
+  }
+
+  static int hnd2idx (const double h)
+  {
+    graphics_object fobj = gh_manager::get_object (h);
+    if (fobj &&  fobj.isa ("figure"))
+      {
+        figure::properties& fp =
+          dynamic_cast<figure::properties&> (fobj.get_properties ());
+        return figprops2idx (fp);
+      }
+    error ("figure_manager: H is not a figure");
+    return -1;
+  }
+
+  static int hnd2idx (const graphics_handle& fh)
+  {
+    return hnd2idx (fh.value ());
+  }
+};
+
+figure_manager *figure_manager::instance = 0;
+
+std::string figure_manager::fltk_idx_header="fltk index=";
+int figure_manager::curr_index = 1;
+
+static bool toolkit_registered = false;
+
+static int
+__fltk_redraw__ (void)
+{
+  if (toolkit_registered)
+    {
+      // We scan all figures and add those which use FLTK.
+      graphics_object obj = gh_manager::get_object (0);
+      if (obj && obj.isa ("root"))
+        {
+          base_properties& props = obj.get_properties ();
+          Matrix children = props.get_all_children ();
+
+          for (octave_idx_type n = 0; n < children.numel (); n++)
+            {
+              graphics_object fobj = gh_manager::get_object (children (n));
+              if (fobj && fobj.isa ("figure"))
+                {
+                  figure::properties& fp =
+                      dynamic_cast<figure::properties&> (fobj.get_properties ());
+                  if (fp.get___graphics_toolkit__ ()
+                      == FLTK_GRAPHICS_TOOLKIT_NAME)
+                    figure_manager::new_window (fp);
+                }
+            }
+        }
+
+      // it seems that we have to call Fl::check twice to get everything drawn
+      Fl::check ();
+      Fl::check ();
+    }
+
+  return 0;
+}
+
+class fltk_graphics_toolkit : public base_graphics_toolkit
+{
+public:
+  fltk_graphics_toolkit (void)
+    : base_graphics_toolkit (FLTK_GRAPHICS_TOOLKIT_NAME) { }
+
+  ~fltk_graphics_toolkit (void) { }
+
+  bool is_valid (void) const { return true; }
+
+  void finalize (const graphics_object& go)
+  {
+    if (go.isa ("figure"))
+      {
+        octave_value ov = go.get (caseless_str ("__plot_stream__"));
+
+        if (! ov.is_empty ())
+          figure_manager::delete_window (ov.string_value ());
+      }
+  }
+
+  void uimenu_set_fltk_label(graphics_object uimenu_obj)
+  {
+    if (uimenu_obj.valid_object ())
+      {
+        uimenu::properties& uimenup =
+          dynamic_cast<uimenu::properties&> (uimenu_obj.get_properties ());
+        std::string fltk_label = uimenup.get_label ();  
+        graphics_object go = gh_manager::get_object (uimenu_obj.get_parent ());
+        if (go.isa ("uimenu"))
+          fltk_label = dynamic_cast<const uimenu::properties&> (go.get_properties ()).get_fltk_label ()
+                     + "/"
+                     + fltk_label;
+        else if (go.isa ("figure"))
+          ;
+        else
+          error("unexpected parent object\n");
+        
+        uimenup.set_fltk_label(fltk_label);
+      }
+  }
+  
+  void update (const graphics_object& go, int id)
+  {
+    if (go.isa ("figure"))
+      {
+        octave_value ov = go.get (caseless_str ("__plot_stream__"));
+        
+        if (! ov.is_empty ())
+          {
+            const figure::properties& fp =
+              dynamic_cast<const figure::properties&> (go.get_properties ());
+            
+            switch (id)
+              {
+                case base_properties::ID_VISIBLE:
+                  figure_manager::toggle_window_visibility (ov.string_value (), fp.is_visible ());
+                  break;
+                case figure::properties::ID_MENUBAR:
+		  figure_manager::toggle_menubar_visibility (ov.string_value (), fp.menubar_is("figure"));
+                  break;
+                case figure::properties::ID_NAME:
+		case figure::properties::ID_CURRENTAXES:
+                  figure_manager::update_canvas (go.get_handle (), fp.get_currentaxes ());
+                  break;
+                case figure::properties::ID_NUMBERTITLE:
+                  figure_manager::set_name (ov.string_value ());
+                  break;
+              }
+          }
+      }
+    else if (go.isa ("uimenu"))
+      {
+        if (id == uimenu::properties::ID_LABEL)
+          uimenu_set_fltk_label (go);
+        
+        graphics_object fig = go.get_ancestor("figure");
+        figure_manager::uimenu_update(fig.get_handle (), go.get_handle (), id);
+      }
+  }
+
+  void redraw_figure (const graphics_object& go) const
+  {
+    figure_manager::mark_modified (go.get_handle ());
+
+    __fltk_redraw__ ();
+  }
+
+  void print_figure (const graphics_object& go,
+                     const std::string& term,
+                     const std::string& file, bool /*mono*/,
+                     const std::string& /*debug_file*/) const 
+  { 
+    int fid;
+    std::istringstream istr (file);
+    if (istr >> fid)
+      {
+        figure_manager::print (go.get_handle (), fid, term);
+        redraw_figure (go);
+      }
+    else
+      error ("fltk_graphics_toolkit: filename should be fid");
+  }
+
+  Matrix get_canvas_size (const graphics_handle& fh) const
+  {
+    return figure_manager::get_size (fh);
+  }
+
+  double get_screen_resolution (void) const
+  {
+    // FLTK doesn't give this info.
+    return 72.0;
+  }
+
+  Matrix get_screen_size (void) const
+  {
+    Matrix sz (1, 2, 0.0);
+    sz(0) = Fl::w ();
+    sz(1) = Fl::h ();
+    return sz;
+  }
+};
+
+// Initialize the fltk graphics toolkit.
+
+DEFUN_DLD (__init_fltk__, , , "")
+{
+  static bool remove_fltk_registered = false;
+
+  if (! toolkit_registered)
+    {
+      mlock ();
+
+      graphics_toolkit::register_toolkit (new fltk_graphics_toolkit);
+      toolkit_registered = true;
+      
+      octave_value_list args;
+      args(0) = "__fltk_redraw__";
+      feval ("add_input_event_hook", args, 0);
+
+      if (! remove_fltk_registered)
+        {
+          octave_add_atexit_function ("__remove_fltk__");
+
+          remove_fltk_registered = true;
+        }
+    }
+
+  octave_value retval;
+  return retval;
+}
+
+DEFUN_DLD (__fltk_redraw__, , , "")
+{
+  __fltk_redraw__ ();
+
+  return octave_value ();
+}
+
+// Delete the fltk graphics toolkit.
+
+DEFUN_DLD (__remove_fltk__, , , "")
+{
+  if (toolkit_registered)
+    {
+      munlock ("__init_fltk__");
+
+      figure_manager::close_all ();
+      graphics_toolkit::unregister_toolkit (FLTK_GRAPHICS_TOOLKIT_NAME);
+      toolkit_registered = false;
+
+      octave_value_list args;
+      args(0) = "__fltk_redraw__";
+      feval ("remove_input_event_hook", args, 0);
+
+      // FIXME ???
+      Fl::wait (fltk_maxtime);
+    }
+
+  octave_value retval;
+  return retval;        
+}
+
+DEFUN_DLD (__fltk_maxtime__, args, ,"")
+{
+  octave_value retval = fltk_maxtime;
+
+  if (args.length () == 1)
+    {
+      if (args(0).is_real_scalar ())
+        fltk_maxtime = args(0).double_value ();
+      else
+        error ("argument must be a real scalar");
+    }
+
+  return retval;
+}
+
+DEFUN_DLD (fltk_mouse_wheel_zoom, args, ,
+  "-*- texinfo -*-\n\
+@deftypefn  {Built-in Function} {@var{speed} =} fltk_mouse_wheel_zoom ()\n\
+@deftypefnx {Built-in Function} {} fltk_mouse_wheel_zoom (@var{speed})\n\
+Query or set the mouse wheel zoom factor in the fltk graphics toolkit.\n\
+@end deftypefn")
+{
+  octave_value retval = wheel_zoom_speed;
+
+  if (args.length () == 1)
+    {
+      if (args(0).is_real_scalar ())
+        wheel_zoom_speed = args(0).double_value ();
+      else
+        error ("fltk_mouse_wheel_zoom: SPEED must be a real scalar");
+    }
+
+  return retval;
+}
+
+DEFUN_DLD (fltk_gui_mode, args, ,
+  "-*- texinfo -*-\n\
+@deftypefn  {Built-in Function} {@var{mode} =} fltk_gui_mode ()\n\
+@deftypefnx {Built-in Function} {} fltk_gui_mode (@var{mode})\n\
+Query or set the GUI mode for the fltk grahpics toolkit.\n\
+The @var{mode} argument can be one of the following strings:\n\
+@table @asis\n\
+@item '2d'\n\
+Allows panning and zooming of current axes.\n\
+\n\
+@item '3d'\n\
+Allows rotating and zooming of current axes.\n\
+\n\
+@item 'none'\n\
+Mouse inputs have no effect.\n\
+@end table\n\
+@end deftypefn")
+{
+  caseless_str mode_str;
+
+  if (gui_mode == pan_zoom)
+    mode_str = "2d";
+  else if (gui_mode == rotate_zoom)
+    mode_str = "3d";
+  else
+    mode_str = "none";
+  
+  
+  bool failed = false;
+  
+  if (args.length () == 1)
+    {
+      if (args(0).is_string ())
+        {
+          mode_str = args(0).string_value ();
+
+          if (mode_str.compare ("2d"))
+            gui_mode = pan_zoom;
+          else if (mode_str.compare ("3d"))
+            gui_mode = rotate_zoom;
+          else if (mode_str.compare ("none"))
+            gui_mode = none;
+          else
+            failed = true;
+        }
+      else
+        failed = true;
+    }
+    
+  if (failed)
+    error ("MODE must be one of the strings: ""2D"", ""3D"", or ""None"".");
+  
+  
+  return octave_value(mode_str);
+}
+
+#include "file-ops.h"
+DEFUN_DLD (__fltk_uigetfile__, args, ,
+  "-*- texinfo -*-\n\
+@deftypefn {Built-in Function} {} __fltk_uigetfile__ (@dots{})\n\
+Undocumented internal function.\n\
+@end deftypefn")
+{
+  // This function should be called by uigetfile.m
+  // Error checking should be done in uigetfile.m!
+  //
+  // Expected argument list
+  // args(0) ... FileFilter in fltk format
+  // args(1) ... Title
+  // args(2) ... Default Filename
+  // args(3) ... PostionValue [x,y] 
+  // args(4) ... SelectValue "on"/"off"/"dir"/"create"
+  
+  std::string file_filter, title, default_name, multi;
+  if (args(0).is_string ())
+    file_filter = args(0).string_value();
+    
+  if (args(1).is_string ())
+    title = args(1).string_value();
+    
+  if (args(2).is_string ())
+    default_name = args(2).string_value();
+    
+  if (args(3).is_real_matrix ())
+    Matrix pos = args(3).matrix_value();
+    
+  int multi_type = Fl_File_Chooser::SINGLE;
+  std::string flabel = "Filename:";
+  if (args(4).is_string ())
+    {
+      multi = args(4).string_value();
+      if (multi == "on")
+        multi_type = Fl_File_Chooser::MULTI;
+      else if (multi == "dir")
+        {
+          multi_type = Fl_File_Chooser::DIRECTORY;
+          flabel = "Directory:";
+        }
+      else if (multi == "create")
+        multi_type = Fl_File_Chooser::CREATE;
+    }
+  
+  Fl_File_Chooser::filename_label = flabel.c_str ();  
+  Fl_File_Chooser *fc = new Fl_File_Chooser(default_name.c_str (), file_filter.c_str (), multi_type, title.c_str ());
+  fc->preview(0);
+  
+  if (multi_type == Fl_File_Chooser::CREATE)
+    fc->ok_label("Save");
+  
+  fc->show();
+  while (fc->shown ())
+        { Fl::wait (); }
+
+  octave_value_list fargs, retval;
+  
+  retval(0) = octave_value(0);
+  retval(1) = octave_value(0);
+  retval(2) = octave_value(0);
+  
+  if (fc->value() != NULL)
+    {
+      int file_count = fc->count ();
+      std::string fname;
+      std::string sep = file_ops::dir_sep_str ();
+      std::size_t idx;
+      
+      if ((file_count == 1) && (multi_type != Fl_File_Chooser::DIRECTORY))
+        {
+          fname = fc->value ();    
+          idx = fname.find_last_of(sep);
+          retval(0) = fname.substr(idx + 1);
+        }
+      else  
+        {
+          Cell file_cell = Cell(file_count, 1);
+          for (octave_idx_type n = 1; n <= file_count; n++)
+            {
+              fname = fc->value (n);    
+              idx = fname.find_last_of(sep);
+              file_cell(n - 1) = fname.substr(idx + 1);
+            }
+          retval(0) = file_cell;
+        }
+        
+      if (multi_type == Fl_File_Chooser::DIRECTORY)
+        retval(0) = std::string(fc->value ());
+      else
+        {
+          retval(1) = std::string(fc->directory ());
+          retval(2) = fc->filter_value();
+        }
+    }
+  
+  return retval;
+}
+
+#endif
--- a/src/DLD-FUNCTIONS/fltk_backend.cc	Wed Jan 19 21:16:13 2011 -0800
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,2124 +0,0 @@
-/*
-
-Copyright (C) 2007-2011 Shai Ayal
-
-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/>.
-
-*/
-
-/*
-
-To initialize:
-
-  backend ("fltk");
-  plot (randn (1e3, 1));
-
-*/
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#if defined (HAVE_FLTK)
-
-#include <map>
-#include <set>
-#include <sstream>
-#include <iostream>
-
-#include <FL/Fl.H>
-#include <FL/Fl_Box.H>
-#include <FL/Fl_Button.H>
-#include <FL/Fl_Choice.H>
-#include <Fl/Fl_File_Chooser.H>
-#include <FL/Fl_Gl_Window.H>
-#include <FL/Fl_Menu_Bar.H>
-#include <FL/Fl_Menu_Button.H>
-#include <FL/Fl_Output.H>
-#include <FL/Fl_Window.H>
-#include <FL/fl_ask.H>
-#include <FL/fl_draw.H>
-#include <FL/gl.h>
-
-#include "cmd-edit.h"
-#include "lo-ieee.h"
-
-#include "defun-dld.h"
-#include "error.h"
-#include "gl-render.h"
-#include "gl2ps-renderer.h"
-#include "graphics.h"
-#include "parse.h"
-#include "toplev.h"
-#include "variables.h"
-
-#define FLTK_BACKEND_NAME "fltk"
-
-// Give FLTK no more than 0.01 sec to do its stuff.
-static double fltk_maxtime = 1e-2;
-
-const char* help_text = "\
-Keyboard Shortcuts\n\
-a - autoscale\n\
-p - pan/zoom\n\
-r - rotate\n\
-g - toggle grid\n\
-\n\
-Mouse\n\
-left drag - pan\n\
-mouse wheel - zoom\n\
-right drag - rectangle zoom\n\
-left double click - autoscale\n\
-";
-
-class OpenGL_fltk : public Fl_Gl_Window
-{
-public:
-  OpenGL_fltk (int xx, int yy, int ww, int hh, double num)
-    : Fl_Gl_Window (xx, yy, ww, hh, 0), number (num), renderer (),
-      in_zoom (false), zoom_box (),  print_fid (-1)
-  {
-    // Ask for double buffering and a depth buffer.
-    mode (FL_DEPTH | FL_DOUBLE);
-  }
-
-  ~OpenGL_fltk (void) { }
-
-  void zoom (bool z) 
-  {
-    in_zoom = z;
-    if (! in_zoom)
-      hide_overlay ();
-  }
-
-  bool zoom (void) { return in_zoom; }
-  void set_zoom_box (const Matrix& zb) { zoom_box = zb; }
-  
-  void print (const int fid, const std::string& term)
-  {
-    print_fid  = fid;
-    print_term  = term;
-  }
-
-  void resize (int xx, int yy, int ww, int hh)
-  {
-    Fl_Gl_Window::resize (xx, yy, ww, hh);
-    setup_viewport (ww, hh);
-    redraw ();
-  }
-  
-private:
-  double number;
-  opengl_renderer renderer;
-  bool in_zoom;
-  // (x1,y1,x2,y2)
-  Matrix zoom_box;
-
-  int print_fid;
-  std::string print_term;
-
-  void setup_viewport (int ww, int hh)
-  {
-    glMatrixMode (GL_PROJECTION);
-    glLoadIdentity ();
-    glViewport (0, 0, ww, hh);
-  }
-
-  void draw (void)
-  {
-    if (! valid ())
-      {
-        valid (1);
-        setup_viewport (w (), h ());
-      }
-
-    if ( print_fid > 0 )
-      {
-        opengl_renderer *rend = new glps_renderer (print_fid, print_term);
-        rend->draw (gh_manager::lookup (number));
-        print_fid = -1;
-        delete rend;
-      }
-    else
-      {
-        renderer.draw (gh_manager::lookup (number));
-
-        if (zoom ())
-          overlay ();
-      }
-  }
-
-  void zoom_box_vertex (void)
-  {
-    glVertex2d (zoom_box(0), h () - zoom_box(1));
-    glVertex2d (zoom_box(0), h () - zoom_box(3));
-    glVertex2d (zoom_box(2), h () - zoom_box(3));
-    glVertex2d (zoom_box(2), h () - zoom_box(1));
-    glVertex2d (zoom_box(0), h () - zoom_box(1));
-  }
- 
-  void overlay (void)
-  {
-    glPushMatrix ();
-
-    glMatrixMode (GL_MODELVIEW);
-    glLoadIdentity ();
-
-    glMatrixMode (GL_PROJECTION);
-    glLoadIdentity ();
-    gluOrtho2D (0.0, w (), 0.0, h ());
-
-    glPushAttrib (GL_DEPTH_BUFFER_BIT | GL_CURRENT_BIT);
-    glDisable (GL_DEPTH_TEST);
-
-    glBegin (GL_POLYGON);
-    glColor4f (0.45, 0.62, 0.81, 0.1);
-    zoom_box_vertex ();
-    glEnd ();
-
-    glBegin (GL_LINE_STRIP);
-    glLineWidth (1.5);
-    glColor4f (0.45, 0.62, 0.81, 0.9);
-    zoom_box_vertex ();
-    glEnd ();
-
-    glPopAttrib ();
-    glPopMatrix ();
-  }
-
-  int handle (int event)
-  {
-    int retval = Fl_Gl_Window::handle (event);
-
-    switch (event)
-      {
-      case FL_ENTER:
-        window ()->cursor (FL_CURSOR_CROSS);
-        return 1;
-
-      case FL_LEAVE:
-        window ()->cursor (FL_CURSOR_DEFAULT);
-        return 1;
-      }
-
-    return retval;
-  }
-};
-
-// Parameter controlling how fast we zoom when using the scrool wheel.
-static double wheel_zoom_speed = 0.05;
-// Parameter controlling the GUI mode.
-static enum { pan_zoom, rotate_zoom, none } gui_mode;
-
-void script_cb(Fl_Widget*, void* data)
-  {
-    static_cast<uimenu::properties*> (data)->execute_callback ();
-  }
-  
-
-class fltk_uimenu
-{
-public:
-  fltk_uimenu (int xx, int yy, int ww, int hh)
-    {
-      menubar = new
-        Fl_Menu_Bar(xx, yy, ww, hh);
-    }
-
-  int items_to_show (void)
-    {
-      //returns the number of visible menu items
-      int len = menubar->size ();
-      int n = 0;
-      for (int t = 0; t < len; t++ )
-        {
-          const Fl_Menu_Item *m = static_cast<const Fl_Menu_Item*>(&(menubar->menu ()[t]));
-          if ((m->label () != NULL) && m->visible ())
-            n++;
-        }
-
-      return n;
-    }
-
-  void show (void)
-    {
-      menubar->show ();
-    }
-
-  void hide (void)
-    {
-      menubar->hide ();
-    }
-
-   bool is_visible (void)
-    {
-      return menubar->visible ();
-    }
-
-  int find_index_by_name (std::string findname)
-    {
-      // This function is derived from Greg Ercolano's function
-      // int GetIndexByName(...), see:
-      // http://seriss.com/people/erco/fltk/#Menu_ChangeLabel
-      // He agreed via PM that it can be included in octave using GPLv3
-      // Kai Habel (14.10.2010)
-
-      std::string menupath;
-      for (int t = 0; t < menubar->size (); t++ )
-        {
-          Fl_Menu_Item *m = const_cast<Fl_Menu_Item*>(&(menubar->menu ()[t]));
-          if (m->submenu ())
-            {
-              // item has submenu
-              if (!menupath.empty ())
-                menupath += "/";
-              menupath += m->label ();
-
-              if (menupath.compare (findname) == 0 )
-                return (t);
-            }
-          else
-            {
-              // End of submenu? Pop back one level.
-              if (m->label () == NULL)
-                {
-                  std::size_t idx = menupath.find_last_of ("/");
-                  if (idx != std::string::npos)
-                    menupath.erase (idx);
-                  else
-                    menupath.clear ();
-                  continue;
-                }   
-              // Menu item?
-              std::string itempath = menupath;
-              if (!itempath.empty ())
-                itempath += "/";              
-              itempath += m->label ();
-
-              if (itempath.compare (findname) == 0)
-                return (t);
-            }
-        }
-      return (-1);
-    }
-  
-  Matrix find_uimenu_children (uimenu::properties& uimenup) const
-    {
-      Matrix uimenu_childs = uimenup.get_all_children ();
-      Matrix retval = do_find_uimenu_children (uimenu_childs);
-      return retval;
-    }
-
-  Matrix find_uimenu_children (figure::properties& figp) const
-    {
-      Matrix uimenu_childs = figp.get_all_children ();
-      Matrix retval = do_find_uimenu_children (uimenu_childs);
-      return retval;
-    }
-    
-  Matrix do_find_uimenu_children (Matrix uimenu_childs) const
-    {
-      octave_idx_type k = 0;
-      
-      
-      Matrix pos = Matrix (uimenu_childs.numel (), 1);
-      
-      for (octave_idx_type ii = 0; ii < uimenu_childs.numel (); ii++)
-      {
-        graphics_object kidgo = gh_manager::get_object (uimenu_childs (ii));
-        
-        if (kidgo.valid_object() && kidgo.isa ("uimenu"))
-          {
-            uimenu_childs(k) = uimenu_childs(ii);
-            pos(k++) =
-              dynamic_cast<uimenu::properties&> (kidgo.get_properties ()).get_position ();
-          }
-      }
-      
-      uimenu_childs.resize (k, 1);    
-      pos.resize (k, 1);
-      Matrix retval = Matrix (k, 1);
-      // Don't know if this is the best method to sort.
-      // Can we avoid the for loop?
-      Array<octave_idx_type> sidx = pos.sort_rows_idx (DESCENDING);
-      for (octave_idx_type ii = 0; ii < k; ii++)
-        retval(ii) = uimenu_childs (sidx(ii));
-       
-      return retval;
-    }
-    
-  void delete_entry(uimenu::properties& uimenup)
-    {
-      std::string fltk_label = uimenup.get_fltk_label ();
-      int idx = find_index_by_name (fltk_label.c_str ());
-
-      if (idx >= 0)
-        menubar->remove (idx);
-    }
-
-  void update_accelerator (uimenu::properties& uimenup)
-    {
-      std::string fltk_label = uimenup.get_fltk_label ();
-      if (!fltk_label.empty ())
-        {
-          Fl_Menu_Item* item = const_cast<Fl_Menu_Item*>(menubar->find_item (fltk_label.c_str ()));
-          if (item != NULL)
-            {
-              std::string acc = uimenup.get_accelerator ();
-              if (acc.length () > 0)
-                {
-                  int key = FL_CTRL + acc[0];
-                  item->shortcut (key);
-                }
-            }
-        }
-    }
-
-  void update_callback (uimenu::properties& uimenup)
-    {
-      std::string fltk_label = uimenup.get_fltk_label ();
-      if (!fltk_label.empty ())
-        {
-          Fl_Menu_Item* item = const_cast<Fl_Menu_Item*>(menubar->find_item (fltk_label.c_str ()));
-          if (item != NULL)
-            {
-              if (!uimenup.get_callback ().is_empty ())
-                item->callback(static_cast<Fl_Callback*>(script_cb), //callback
-                              static_cast<void*>(&uimenup));        //callback data
-              else
-                item->callback(NULL, static_cast<void*>(0));
-            }
-        }
-    }
-            
-  void update_enable (uimenu::properties& uimenup)
-    {
-      std::string fltk_label = uimenup.get_fltk_label ();
-      if (!fltk_label.empty ())
-        {
-          Fl_Menu_Item* item = const_cast<Fl_Menu_Item*>(menubar->find_item (fltk_label.c_str ()));
-          if (item != NULL)
-            {
-              if (uimenup.is_enable ())
-                item->activate ();
-              else
-                item->deactivate ();
-            }
-        }
-    }
-
-  void update_foregroundcolor (uimenu::properties& uimenup)
-    {
-      std::string fltk_label = uimenup.get_fltk_label ();
-      if (!fltk_label.empty ())
-        {
-          Fl_Menu_Item* item = const_cast<Fl_Menu_Item*>(menubar->find_item (fltk_label.c_str ()));
-          if (item != NULL)
-            {
-              Matrix rgb = uimenup.get_foregroundcolor_rgb ();
-              item->labelcolor(fl_rgb_color(static_cast<uchar>(floor (rgb(0)*255)),
-                                            static_cast<uchar>(floor (rgb(1)*255)),
-                                            static_cast<uchar>(floor (rgb(2)*255))));
-            }
-        }
-    }
-
-  void update_seperator (uimenu::properties& uimenup)
-    {
-      // Matlab places the separator before the current
-      // menu entry, while fltk places it after. So we need to find
-      // the previous item in this menu/submenu. (Kai)
-      std::string fltk_label = uimenup.get_fltk_label ();
-      if (!fltk_label.empty ())
-        {
-          int itemflags = 0, idx;
-          int curr_idx = find_index_by_name(fltk_label.c_str ());
-
-          for (idx = curr_idx - 1; idx >= 0; idx--)
-            { 
-              Fl_Menu_Item* item = const_cast<Fl_Menu_Item*>(&menubar->menu () [idx]);
-              itemflags = item->flags;
-              if (item->label () != NULL)
-                break;
-            }
-
-          if ((idx >= 0) && (idx < menubar->size ()))
-            {
-              if (uimenup.is_separator ())
-                {
-                  if (idx >= 0 && !(itemflags & FL_SUBMENU))
-                    menubar->mode (idx, itemflags | FL_MENU_DIVIDER);
-                }
-              else
-                menubar->mode (idx, itemflags & (~FL_MENU_DIVIDER));
-            }
-        }
-    }
-
-  void update_visible (uimenu::properties& uimenup)
-    {
-      std::string fltk_label = uimenup.get_fltk_label ();
-      if (!fltk_label.empty ())
-        {
-          Fl_Menu_Item* item = const_cast<Fl_Menu_Item*>(menubar->find_item (fltk_label.c_str ()));
-          if (item != NULL)
-            {
-              if (uimenup.is_visible ())
-                item->show ();
-              else
-                item->hide ();
-            }
-        }
-    }
-    
-  void add_entry (uimenu::properties& uimenup)
-    {
-
-      std::string fltk_label = uimenup.get_fltk_label ();
-
-      if (!fltk_label.empty ())
-        {
-          bool item_added = false;
-          do
-            {  
-              const Fl_Menu_Item* item = menubar->find_item(fltk_label.c_str ());
-              
-              if (item == NULL)
-                {
-                  Matrix uimenu_ch = find_uimenu_children (uimenup);
-                  int len = uimenu_ch.numel ();
-                  int flags = 0;
-                  if (len > 0) 
-                    flags = FL_SUBMENU;
-                  if ((len == 0) && (uimenup.is_checked ()))
-                    flags += FL_MENU_TOGGLE + FL_MENU_VALUE;
-                  menubar->add(fltk_label.c_str (), 0, 0, 0, flags);      
-                  item_added = true;
-                }
-              else
-                {
-                  //avoid duplicate menulabels
-                  std::size_t idx1 = fltk_label.find_last_of ("(");
-                  std::size_t idx2 = fltk_label.find_last_of (")");
-                  int len = idx2 - idx1;
-                  int val = 1;
-                  if (len > 0)
-                    {
-                      std::string valstr = fltk_label.substr (idx1 + 1, len - 1);
-                      fltk_label.erase(idx1, len + 1);
-                      val = atoi (valstr.c_str ());
-                      if ((val > 0) && (val < 99))
-                        val++;
-                    }
-                  std::ostringstream valstream;
-                  valstream << val;
-                  fltk_label += "(" + valstream.str () + ")";
-                }
-            }
-          while (!item_added);
-          uimenup.set_fltk_label (fltk_label);
-        }
-    }  
-
-  void add_to_menu (uimenu::properties& uimenup)
-    {
-      Matrix kids = find_uimenu_children (uimenup);
-      int len = kids.length ();
-      std::string fltk_label = uimenup.get_fltk_label ();
-      
-      add_entry (uimenup);
-      update_foregroundcolor (uimenup);
-      update_callback (uimenup);
-      update_accelerator (uimenup);
-      update_enable (uimenup);
-      update_visible (uimenup);
-      update_seperator (uimenup);
-      
-      for (octave_idx_type ii = 0; ii < len; ii++)
-        {
-          graphics_object kgo = gh_manager::get_object (kids (len - (ii + 1)));
-          if (kgo.valid_object ())
-            {
-              uimenu::properties& kprop = dynamic_cast<uimenu::properties&>(kgo.get_properties ());
-              add_to_menu (kprop);
-            }
-        }
-    }
-
-  void add_to_menu (figure::properties& figp)
-    {
-      Matrix kids = find_uimenu_children (figp);
-      int len = kids.length ();
-      menubar->clear ();      
-      for (octave_idx_type ii = 0; ii < len; ii++)
-        {
-          graphics_object kgo = gh_manager::get_object (kids (len - (ii + 1)));
-
-          if (kgo.valid_object ())
-            {
-              uimenu::properties& kprop = dynamic_cast<uimenu::properties&>(kgo.get_properties ());
-              add_to_menu (kprop);
-            }
-        }
-    }
-
-  template <class T_prop>
-  void remove_from_menu (T_prop& prop)
-    {
-      Matrix kids;
-      std::string type = prop.get_type ();
-      kids = find_uimenu_children (prop);    
-      int len = kids.length ();
-
-      for (octave_idx_type ii = 0; ii < len; ii++)
-        {
-          graphics_object kgo = gh_manager::get_object (kids (len - (ii + 1)));
-
-          if (kgo.valid_object ())
-            {
-              uimenu::properties kprop = dynamic_cast<uimenu::properties&>(kgo.get_properties ());
-              remove_from_menu (kprop);
-            }
-        }
-
-      if (type.compare("uimenu") == 0)
-        delete_entry(dynamic_cast<uimenu::properties&>(prop));
-      else if (type.compare("figure") == 0)
-        menubar->clear ();
-    }
-
-  ~fltk_uimenu()
-    {
-      delete menubar;
-    }
-    
-private:
-  Fl_Menu_Bar* menubar;
-};
-
-class plot_window : public Fl_Window
-{
-  friend class fltk_uimenu;
-public:
-  plot_window (int xx, int yy, int ww, int hh, figure::properties& xfp)
-    : Fl_Window (xx, yy, ww, hh, "octave"), window_label (), shift (0),
-      ndim (2), fp (xfp), canvas (0), autoscale (0), togglegrid (0),
-      panzoom (0), rotate (0), help (0), status (0)
-  {
-    callback (window_close, static_cast<void*> (this));
-
-    begin ();
-    {
-      
-      uimenu = new
-        fltk_uimenu(0, 0, ww, menu_h);
-      uimenu->hide ();
-      
-      canvas = new
-        OpenGL_fltk (0, 0, ww , hh - status_h, number ());
-
-      bottom = new 
-        Fl_Box (0, 
-                hh - status_h, 
-                ww, 
-                status_h);
-      bottom->box(FL_FLAT_BOX);
-
-      ndim = calc_dimensions (gh_manager::get_object (fp.get___myhandle__ ()));
-
-      autoscale = new
-        Fl_Button (0,
-                   hh - status_h,
-                   status_h,
-                   status_h,
-                   "A");
-      autoscale->callback (button_callback, static_cast<void*> (this));
-      autoscale->tooltip ("Autoscale");
-
-      togglegrid = new
-        Fl_Button (status_h,
-                   hh - status_h,
-                   status_h,
-                   status_h,
-                   "G");
-      togglegrid->callback (button_callback, static_cast<void*> (this));
-      togglegrid->tooltip ("Toggle Grid");
-
-      panzoom = new
-        Fl_Button (2 * status_h,
-                   hh - status_h,
-                   status_h,
-                   status_h,
-                   "P");
-      panzoom->callback (button_callback, static_cast<void*> (this));
-      panzoom->tooltip ("Mouse Pan/Zoom");
-
-      rotate = new
-        Fl_Button (3 * status_h,
-                   hh - status_h,
-                   status_h,
-                   status_h,
-                   "R");
-      rotate->callback (button_callback, static_cast<void*> (this));
-      rotate->tooltip ("Mouse Rotate");
-
-      if (ndim == 2)
-        rotate->deactivate ();
-
-      help = new
-        Fl_Button (4 * status_h,
-                   hh - status_h,
-                   status_h,
-                   status_h,
-                   "?");
-      help->callback (button_callback, static_cast<void*> (this));
-      help->tooltip ("Help");
-
-      status = new
-        Fl_Output (5 * status_h,
-                   hh - status_h,
-                   ww > 2*status_h ? ww - status_h : 0,
-                   status_h, "");
-
-      status->textcolor (FL_BLACK);
-      status->color (FL_GRAY);
-      status->textfont (FL_COURIER);
-      status->textsize (10);
-      status->box (FL_ENGRAVED_BOX);
-
-      // This allows us to have a valid OpenGL context right away.
-      canvas->mode (FL_DEPTH | FL_DOUBLE );
-      if (fp.is_visible ())
-        {
-          show ();
-          if (fp.get_currentaxes ().ok())
-            show_canvas ();
-          else
-            hide_canvas ();
-        }
-    }
-    end ();
-
-    status->show ();
-    autoscale->show ();
-    togglegrid->show ();
-    panzoom->show ();
-    rotate->show ();
-
-    set_name ();
-    resizable (canvas);
-    size_range (4*status_h, 2*status_h);
-    gui_mode = (ndim == 3 ? rotate_zoom : pan_zoom);
-    uimenu->add_to_menu (fp);
-    if (uimenu->items_to_show ())
-      show_menubar ();
-    else
-      hide_menubar ();
-  }
-
-  ~plot_window (void)
-  {
-    canvas->hide ();
-    status->hide ();
-    uimenu->hide ();
-    this->hide ();
-    delete canvas;
-    delete status;
-    delete uimenu;
-  }
-
-  // FIXME -- this could change.
-  double number (void) { return fp.get___myhandle__ ().value (); }
-
-  void print (const int fid, const std::string& term)
-  {
-    canvas->print (fid, term);
-
-    // Print immediately so the output file will exist when the drawnow
-    // command is done.
-    mark_modified ();
-    Fl::wait (fltk_maxtime);
-  }
-
-  void show_menubar (void)
-  {
-    int dm = menu_h;
-    if (uimenu->is_visible ())
-      dm = 0;
-    canvas->resize (canvas->x (),
-                    canvas->y () + dm,
-                    canvas->w (),
-                    canvas->h () - dm);
-    uimenu->show ();
-    mark_modified ();
-  }
-  
-  void hide_menubar (void)
-  {
-    int dm = menu_h;
-    if (!uimenu->is_visible ())
-      dm = 0;
-    canvas->resize (canvas->x (),
-                    canvas->y () - dm,
-                    canvas->w (),
-                    canvas->h () + dm);
-    uimenu->hide ();
-    mark_modified (); 
-  }
-  
-  void uimenu_update(graphics_handle gh, int id)
-  {
-    graphics_object uimenu_obj = gh_manager::get_object (gh);
-    
-    if (uimenu_obj.valid_object () && uimenu_obj.isa ("uimenu"))
-      {
-        uimenu::properties& uimenup =
-          dynamic_cast<uimenu::properties&> (uimenu_obj.get_properties ());
-        std::string fltk_label = uimenup.get_fltk_label();
-        graphics_object fig = uimenu_obj.get_ancestor("figure");
-        figure::properties& figp =
-          dynamic_cast<figure::properties&> (fig.get_properties ());
-        
-        switch(id)
-          {
-            case base_properties::ID_BEINGDELETED:
-              uimenu->remove_from_menu (uimenup);
-              break;
-            case base_properties::ID_VISIBLE:
-              uimenu->update_visible (uimenup);
-              break;
-            case uimenu::properties::ID_ACCELERATOR:
-              uimenu->update_accelerator (uimenup);
-              break;
-            case uimenu::properties::ID_CALLBACK:
-              uimenu->update_callback (uimenup);
-              break;
-            case uimenu::properties::ID_CHECKED:
-              uimenu->add_to_menu (figp);//rebuilding entire menu
-              break;
-            case uimenu::properties::ID_ENABLE:
-              uimenu->update_enable (uimenup);
-              break;
-            case uimenu::properties::ID_FOREGROUNDCOLOR:
-              uimenu->update_foregroundcolor (uimenup);
-              break;
-            case uimenu::properties::ID_LABEL:
-              uimenu->add_to_menu (figp);//rebuilding entire menu
-              break;
-            case uimenu::properties::ID_POSITION:
-              uimenu->add_to_menu (figp);//rebuilding entire menu
-              break;
-            case uimenu::properties::ID_SEPARATOR:
-              uimenu->update_seperator (uimenup);
-              break;
-          }
-          
-          if (uimenu->items_to_show ())
-            show_menubar ();
-          else
-            hide_menubar ();
-          
-          mark_modified();
-      }
-  }
-
-  void show_canvas (void)
-  {
-    canvas->show ();
-    canvas->make_current ();
-  }
-  
-  void hide_canvas (void)
-  {
-    canvas->hide ();
-  }
-  
-  void mark_modified (void)
-  {
-    damage (FL_DAMAGE_ALL);
-    canvas->damage (FL_DAMAGE_ALL);
-    ndim = calc_dimensions (gh_manager::get_object (fp.get___myhandle__ ()));
-
-    if (ndim == 3)
-      rotate->activate ();
-    else if ((ndim == 2) &&  (gui_mode == rotate_zoom))
-      {
-        rotate->deactivate ();
-        gui_mode = pan_zoom;
-      }
-  }
-
-  void set_name (void)
-  {
-    window_label = fp.get_title ();
-    label (window_label.c_str ());
-  }
-
-private:
-  // window name -- this must exists for the duration of the window's
-  // life
-  std::string window_label;
-
-  // Mod keys status
-  int shift;
-
-  // Number of dimensions, 2 or 3.
-  int ndim;
-
-  // Figure properties.
-  figure::properties& fp;
-
-  // Status area height.
-  static const int status_h = 20;
-
-  // Menu height
-  static const int menu_h = 20;
-
-  // Window callback.
-  static void window_close (Fl_Widget*, void* data)
-  {
-    octave_value_list args;
-    args(0) = static_cast<plot_window*> (data)->number ();
-    feval ("close", args);
-  }
-
-  // Button callbacks.
-  static void button_callback (Fl_Widget* ww, void* data)
-  {
-    static_cast<plot_window*> (data)->button_press (ww, data);
-  }
-
-  void button_press (Fl_Widget* widg, void*)
-  {
-    if (widg == autoscale)
-      axis_auto ();
-
-    if (widg == togglegrid)
-      toggle_grid ();
-    
-    if (widg == panzoom)
-      gui_mode = pan_zoom;
-    
-    if (widg == rotate && ndim == 3)
-      gui_mode = rotate_zoom;
-
-    if (widg == help)
-      fl_message ("%s", help_text);
-  }
-
-  fltk_uimenu* uimenu;
-  OpenGL_fltk* canvas;
-  Fl_Box*    bottom;
-  Fl_Button* autoscale;
-  Fl_Button* togglegrid;
-  Fl_Button* panzoom;
-  Fl_Button* rotate;
-  Fl_Button* help;
-  Fl_Output* status;
-
-  void axis_auto (void)
-  {
-    octave_value_list args;
-    args(0) = fp.get_currentaxes ().as_octave_value ();
-    args(1) = "auto";
-    feval ("axis", args);
-    mark_modified ();
-  }
-
-  void toggle_grid (void)
-  {
-    octave_value_list args;
-    if (fp.get_currentaxes ().ok ())
-      args(0) = fp.get_currentaxes ().as_octave_value ();
-    
-    feval ("grid", args);
-    mark_modified ();
-  }
-  
-  void pixel2pos 
-  (graphics_handle ax, int px, int py, double& xx, double& yy) const
-  {
-    pixel2pos ( gh_manager::get_object (ax), px, py, xx, yy);
-  }
-
-  void pixel2pos 
-  (graphics_object ax, int px, int py, double& xx, double& yy) const
-  {
-    if (ax && ax.isa ("axes"))
-      {
-        axes::properties& ap =
-          dynamic_cast<axes::properties&> (ax.get_properties ());
-        ColumnVector pp = ap.pixel2coord (px, py);
-        xx = pp(0);
-        yy = pp(1);
-      }
-  }
-
-  graphics_handle pixel2axes_or_ca (int px, int py )
-  {
-    Matrix kids = fp.get_children ();
-    int len = kids.length ();
-
-    for (int k = 0; k < len; k++)
-      {
-        graphics_handle hnd = gh_manager::lookup (kids(k));
-
-        if (hnd.ok ())
-          {
-            graphics_object kid = gh_manager::get_object (hnd);
-
-            if (kid.valid_object () && kid.isa ("axes"))
-              {
-                Matrix bb = kid.get_properties ().get_boundingbox (true);
-
-                if (bb(0) <= px && px < (bb(0)+bb(2))
-                    && bb(1) <= py && py < (bb(1)+bb(3)))
-                  {
-                    return hnd;
-                  }
-              }
-          }
-      }
-    return fp.get_currentaxes ();
-  }
-  
-  void pixel2status (graphics_handle ax, int px0, int py0,
-                     int px1 = -1, int py1 = -1)
-  {
-    pixel2status (gh_manager::get_object (ax), px0, py0, px1, py1);
-  }
-
-  void pixel2status (graphics_object ax, int px0, int py0,
-                     int px1 = -1, int py1 = -1)
-  {
-    double x0, y0, x1, y1;
-    std::stringstream cbuf;
-    cbuf.precision (4);
-    cbuf.width (6);
-    pixel2pos (ax, px0, py0, x0, y0);
-    cbuf << "[" << x0 << ", " << y0 << "]";
-    if (px1 >= 0)
-      {
-        pixel2pos (ax, px1, py1, x1, y1);
-        cbuf << " -> ["<< x1 << ", " << y1 << "]";
-      }
-
-    status->value (cbuf.str ().c_str ());
-    status->redraw ();
-  }
-
-  void view2status (graphics_object ax)
-  {
-     if (ax && ax.isa ("axes"))
-       {
-         axes::properties& ap = 
-           dynamic_cast<axes::properties&> (ax.get_properties ());
-         std::stringstream cbuf;
-         cbuf.precision (4);
-         cbuf.width (6);
-         Matrix v (1,2,0);
-         v = ap.get("view").matrix_value();
-         cbuf << "[azimuth: " << v(0) << ", elevation: " << v(1) << "]";
-    
-         status->value (cbuf.str ().c_str ());
-         status->redraw ();
-       }
-  }
-  
-  void set_currentpoint (int px, int py)
-  {
-    if (!fp.is_beingdeleted ())
-      {
-        Matrix pos (1,2,0);
-        pos(0) = px;
-        pos(1) = h () - status_h - menu_h - py;
-        fp.set_currentpoint (pos);
-      }
-  }
-
-  void set_axes_currentpoint (graphics_object ax, int px, int py)
-  {
-    if (ax.valid_object ())
-      {
-        axes::properties& ap = 
-          dynamic_cast<axes::properties&> (ax.get_properties ());
-    
-        double xx, yy;
-        pixel2pos (ax, px, py, xx, yy);
-
-        Matrix pos (2,3,0);
-        pos(0,0) = xx;
-        pos(1,0) = yy;
-        pos(0,1) = xx;
-        pos(1,1) = yy;
-
-        ap.set_currentpoint (pos);
-      }
-  }
-
-  int key2shift (int key)
-  {
-    if (key == FL_Shift_L || key == FL_Shift_R)
-      return FL_SHIFT;
-
-    if (key == FL_Control_L || key == FL_Control_R)
-      return FL_CTRL;
-
-    if (key == FL_Alt_L || key == FL_Alt_R)
-      return FL_ALT;
-
-    if (key == FL_Meta_L || key == FL_Meta_R)
-      return FL_META;
-
-    return 0;
-  }
-
-  int key2ascii (int key)
-  {
-    if (key < 256) return key;
-    if (key == FL_Tab) return '\t';
-    if (key == FL_Enter) return 0x0a;
-    if (key == FL_BackSpace) return 0x08;
-    if (key == FL_Escape) return 0x1b;
-
-    return 0;
-  }
-
-  Cell modifier2cell ()
-  {
-    string_vector mod;
-    
-    if (shift & FL_SHIFT)
-      mod.append (std::string ("shift"));
-    if (shift & FL_CTRL)
-      mod.append (std::string ("control"));
-    if (shift & FL_ALT || shift & FL_META)
-      mod.append (std::string ("alt"));
-
-    return Cell (mod);
-  }
-
-  void resize (int xx,int yy,int ww,int hh)
-  {
-    Fl_Window::resize (xx, yy, ww, hh);
-
-    Matrix pos (1,4,0);
-    pos(0) = xx;
-    pos(1) = yy;
-    pos(2) = ww;
-    pos(3) = hh - status_h - menu_h;
-
-    fp.set_position (pos);
-  }
-
-  void draw (void)
-  {
-    Matrix pos = fp.get_position ().matrix_value ();
-    Fl_Window::resize (pos(0), pos(1) , pos(2), pos(3) + status_h + menu_h);
-
-    return Fl_Window::draw ();
-  }
-
-  int handle (int event)
-  {
-    static int px0,py0;
-    static graphics_object ax0;
-
-    graphics_handle gh;
-
-    graphics_object fig = gh_manager::get_object (fp.get___myhandle__ ());
-    int retval = Fl_Window::handle (event);
-
-    // We only handle events which are in the canvas area.
-    if (!Fl::event_inside(canvas))
-      return retval;
-
-    if (!fp.is_beingdeleted ())
-      {
-        switch (event)
-          {
-          case FL_KEYDOWN:
-            {
-              int key = Fl::event_key ();
-
-              shift |= key2shift (key);
-              int key_a = key2ascii (key);
-              if (key_a && fp.get_keypressfcn ().is_defined ()) 
-                {
-                  Octave_map evt;
-                  evt.assign ("Character", octave_value (key_a));
-                  evt.assign ("Key", octave_value (std::tolower (key_a)));
-                  evt.assign ("Modifier", octave_value (modifier2cell ()));
-                  fp.execute_keypressfcn (evt);
-                }
-              switch (key)
-                {
-                case 'a':
-                case 'A':
-                  axis_auto ();
-                break;
-
-                case 'g':
-                case 'G':
-                  toggle_grid ();
-                break;
-
-                case 'p':
-                case 'P':
-                  gui_mode = pan_zoom;
-                break;
-
-                case 'r':
-                case 'R':
-                  gui_mode = rotate_zoom;
-                break;
-                }
-            }
-            break;
-
-          case FL_KEYUP:
-            {
-              int key = Fl::event_key ();
-
-              shift &= (~key2shift (key));
-              int key_a = key2ascii (key);
-              if (key_a && fp.get_keyreleasefcn ().is_defined ())
-                {
-                  Octave_map evt;
-                  evt.assign ("Character", octave_value (key_a));
-                  evt.assign ("Key", octave_value (std::tolower (key_a)));
-                  evt.assign ("Modifier", octave_value (modifier2cell ()));
-                  fp.execute_keyreleasefcn (evt);
-                }
-            }
-            break;
-
-          case FL_MOVE:
-            pixel2status (pixel2axes_or_ca (Fl::event_x (), Fl::event_y ()),
-                          Fl::event_x (), Fl::event_y ());
-            break;
-
-          case FL_PUSH:
-            px0 = Fl::event_x ();
-            py0 = Fl::event_y ();
-
-            set_currentpoint (Fl::event_x (), Fl::event_y ());
-            
-            gh = pixel2axes_or_ca (px0, py0);
-
-            if (gh.ok ())
-              {
-                ax0 = gh_manager::get_object (gh);
-                set_axes_currentpoint (ax0, px0, py0);
-              }
-              
-            fp.execute_windowbuttondownfcn ();
-
-            if (Fl::event_button () == 1 || Fl::event_button () == 3)
-              return 1;
-
-            break;
-
-          case FL_DRAG:
-            if (fp.get_windowbuttonmotionfcn ().is_defined ())
-              {
-                set_currentpoint (Fl::event_x (), Fl::event_y ());
-                fp.execute_windowbuttonmotionfcn ();
-              }
-            
-            if (Fl::event_button () == 1)
-              {
-                if (ax0 && ax0.isa ("axes"))
-                  {
-                    if (gui_mode == pan_zoom)
-                      pixel2status (ax0, px0, py0, Fl::event_x (), Fl::event_y ());
-                    else
-                      view2status (ax0);
-                    axes::properties& ap = 
-                      dynamic_cast<axes::properties&> (ax0.get_properties ());
-                  
-                    double x0, y0, x1, y1;
-                    Matrix pos = fp.get_position ().matrix_value ();
-                    pixel2pos (ax0, px0, py0, x0, y0);
-                    pixel2pos (ax0, Fl::event_x (), Fl::event_y (), x1, y1);
-                    
-                    if (gui_mode == pan_zoom)
-                      ap.translate_view (x0 - x1, y0 - y1);
-                    else if (gui_mode == rotate_zoom)
-                      {
-                        double daz, del;
-                        daz = (Fl::event_x () - px0) / pos(2) * 360;
-                        del = (Fl::event_y () - py0) / pos(3) * 360;
-                        ap.rotate_view (del, daz);
-                      }
-
-                    px0 = Fl::event_x ();
-                    py0 = Fl::event_y ();
-                    mark_modified ();
-                  }
-                return 1;
-              }
-            else if (Fl::event_button () == 3)
-              {
-                pixel2status (ax0, px0, py0, Fl::event_x (), Fl::event_y ());
-                Matrix zoom_box (1,4,0);
-                zoom_box (0) = px0;
-                zoom_box (1) = py0;
-                zoom_box (2) =  Fl::event_x ();
-                zoom_box (3) =  Fl::event_y ();
-                canvas->set_zoom_box (zoom_box);
-                canvas->zoom (true);
-                canvas->redraw ();
-              }
-
-            break;
-
-          case FL_MOUSEWHEEL:
-            {
-              graphics_object ax = 
-                gh_manager::get_object (pixel2axes_or_ca (Fl::event_x (), 
-                                                          Fl::event_y ()));                                                                      
-              if (ax && ax.isa ("axes"))
-                {
-                  axes::properties& ap = 
-                    dynamic_cast<axes::properties&> (ax.get_properties ());
-                  
-                  // Determine if we're zooming in or out.
-                  const double factor = 
-                    (Fl::event_dy () > 0) ? 1.0 + wheel_zoom_speed : 1.0 - wheel_zoom_speed;
-                  
-                  // Get the point we're zooming about.
-                  double x1, y1;
-                  pixel2pos (ax, Fl::event_x (), Fl::event_y (), x1, y1);
-                  
-                  ap.zoom_about_point (x1, y1, factor, false);
-                  mark_modified ();
-                }
-            }
-          return 1;
-
-          case FL_RELEASE:
-            if (fp.get_windowbuttonupfcn ().is_defined ())
-              {
-                set_currentpoint (Fl::event_x (), Fl::event_y ());
-                fp.execute_windowbuttonupfcn ();
-              }
-          
-            if (Fl::event_button () == 1)
-              {
-                if ( Fl::event_clicks () == 1)
-                  {
-                    if (ax0 && ax0.isa ("axes"))
-                      {
-                        axes::properties& ap =
-                          dynamic_cast<axes::properties&> (ax0.get_properties ());
-                        ap.set_xlimmode("auto");
-                        ap.set_ylimmode("auto");
-                        ap.set_zlimmode("auto");
-                        mark_modified ();
-                      }
-                  }
-              }
-            if (Fl::event_button () == 3)
-              {
-                // End of drag -- zoom.
-                if (canvas->zoom ())
-                  {
-                    canvas->zoom (false);
-                    double x0,y0,x1,y1;
-                    if (ax0 && ax0.isa ("axes"))
-                      {
-                        axes::properties& ap =
-                          dynamic_cast<axes::properties&> (ax0.get_properties ());
-                        pixel2pos (ax0, px0, py0, x0, y0);
-                        pixel2pos (ax0, Fl::event_x (), Fl::event_y (), x1, y1);
-                        Matrix xl (1,2,0);
-                        Matrix yl (1,2,0);
-                        if (x0 < x1)
-                          {
-                            xl(0) = x0;
-                            xl(1) = x1;
-                          }
-                        else
-                          {
-                            xl(0) = x1;
-                            xl(1) = x0;
-                          }
-                        if (y0 < y1)
-                          {
-                            yl(0) = y0;
-                            yl(1) = y1;
-                          }
-                        else
-                          {
-                            yl(0) = y1;
-                            yl(1) = y0;
-                          }
-                        ap.zoom (xl, yl);
-                        mark_modified ();
-                      }
-                  }
-              }
-            break;
-          }
-      }
-
-    return retval;
-  }
-};
-
-class figure_manager
-{
-public:
-
-  static bool instance_ok (void)
-  {
-    bool retval = true;
-
-    if (! instance)
-      instance = new figure_manager ();
-
-    if (! instance)
-      {
-        ::error ("unable to create figure_manager object!");
-
-        retval = false;
-      }
-
-    return retval;
-  }
-
-  ~figure_manager (void)
-  {
-    close_all ();
-  }
-
-  static void close_all (void)
-  {
-    if (instance_ok ())
-      instance->do_close_all ();
-  }
-
-  static void new_window (figure::properties& fp)
-  {
-    if (instance_ok ())
-      instance->do_new_window (fp);
-  }
-
-  static void delete_window (int idx)
-  {
-    if (instance_ok ())
-      instance->do_delete_window (idx);
-  }
-
-  static void delete_window (std::string idx_str)
-  {
-    delete_window (str2idx (idx_str));
-  }
-
-  static void toggle_window_visibility (int idx, bool is_visible)
-  {
-    if (instance_ok ())
-      instance->do_toggle_window_visibility (idx, is_visible);
-  }
-
-  static void toggle_window_visibility (std::string idx_str, bool is_visible)
-  {
-    toggle_window_visibility (str2idx (idx_str), is_visible);
-  }
-
-  static void mark_modified (int idx)
-  {
-    if (instance_ok ())
-      instance->do_mark_modified (idx);
-  }
-
-  static void mark_modified (const graphics_handle& gh)
-  {
-    mark_modified (hnd2idx (gh));
-  }
-
-  static void set_name (int idx)
-  {
-    if (instance_ok ())
-      instance->do_set_name (idx);
-  }
-
-  static void set_name (std::string idx_str)
-  {
-    set_name (str2idx (idx_str));
-  }
-
-  static Matrix get_size (int idx)
-  {
-    return instance_ok () ? instance->do_get_size (idx) : Matrix ();
-  }
-
-  static Matrix get_size (const graphics_handle& gh)
-  {
-    return get_size (hnd2idx (gh));
-  }
-
-  static void print (const graphics_handle& gh , const int fid,  const std::string& term)
-  {
-    if (instance_ok ())
-      instance->do_print (hnd2idx(gh), fid, term);
-  }
-  
-  static void uimenu_update (const graphics_handle& figh, const graphics_handle& uimenuh, const int id)
-  {
-    if (instance_ok ())
-      instance->do_uimenu_update (hnd2idx(figh), uimenuh, id);
-  }
-  
-  static void update_canvas (const graphics_handle& gh, const graphics_handle& ca)
-  {
-    if (instance_ok ())
-      instance->do_update_canvas (hnd2idx(gh), ca);
-  }
-  
-  static void toggle_menubar_visibility (int fig_idx, bool menubar_is_figure)
-  {
-    if (instance_ok ())
-      instance->do_toggle_menubar_visibility (fig_idx, menubar_is_figure);
-  }
-
-  static void toggle_menubar_visibility (std::string fig_idx_str, bool menubar_is_figure)
-  {
-    toggle_menubar_visibility (str2idx (fig_idx_str), menubar_is_figure);
-  }
-  
-private:
-
-  static figure_manager *instance;
-
-  figure_manager (void) { }
-
-  // No copying!
-  figure_manager (const figure_manager&);
-  figure_manager& operator = (const figure_manager&);
-
-  // Singelton -- hide all of the above.
-
-  static int curr_index;
-  typedef std::map<int, plot_window*> window_map;
-  typedef window_map::iterator wm_iterator;;
-  window_map windows;
-
-  static std::string fltk_idx_header;
-
-  void do_close_all (void)
-  {
-    wm_iterator win;
-    for (win = windows.begin (); win != windows.end (); win++)
-      delete win->second;
-    windows.clear ();
-  }
-
-  void do_new_window (figure::properties& fp)
-  {
-    int x, y, w, h;
-
-    int idx = figprops2idx (fp);
-    if (idx >= 0 && windows.find (idx) == windows.end ())
-      {
-        default_size (x, y, w, h);
-        idx2figprops (curr_index , fp);
-        windows[curr_index++] = new plot_window (x, y, w, h, fp);
-      }
-  }
-
-  void do_delete_window (int idx)
-  {
-    wm_iterator win;
-    if ((win = windows.find (idx)) != windows.end ())
-      {
-        delete win->second;
-        windows.erase (win);
-      }
-  }
-
-  void do_toggle_window_visibility (int idx, bool is_visible)
-  {
-    wm_iterator win;
-    if ((win = windows.find (idx)) != windows.end ())
-      {
-        if (is_visible)
-          win->second->show ();
-        else
-          win->second->hide ();
-
-        win->second->redraw ();
-      }
-  }
-
-  void do_toggle_menubar_visibility (int fig_idx, bool menubar_is_figure)
-  {
-    wm_iterator win;
-    if ((win = windows.find (fig_idx)) != windows.end ())
-      {
-	if (menubar_is_figure)
-          win->second->show_menubar ();
-        else
-          win->second->hide_menubar ();
-	
-        win->second->redraw ();
-      }
-  }
-  
-  void do_mark_modified (int idx)
-  {
-    wm_iterator win;
-    if ((win = windows.find (idx)) != windows.end ())
-      {
-        win->second->mark_modified ();
-      }
-  }
-
-  void do_set_name (int idx)
-  {
-    wm_iterator win;
-    if ((win = windows.find (idx)) != windows.end ())
-      {
-        win->second->set_name ();
-      }
-  }
-
-  Matrix do_get_size (int idx)
-  {
-    Matrix sz (1, 2, 0.0);
-
-    wm_iterator win;
-    if ((win = windows.find (idx)) != windows.end ())
-      {
-        sz(0) = win->second->w ();
-        sz(1) = win->second->h ();
-      }
-
-    return sz;
-  }
-
-  void do_print (int idx, const int fid,  const std::string& term)
-  {
-    wm_iterator win;
-    if ((win = windows.find (idx)) != windows.end ())
-      {
-        win->second->print (fid, term);
-      }
-  }
-
-  void do_uimenu_update (int idx, graphics_handle gh, int id)
-  {
-    wm_iterator win;
-    if ((win = windows.find (idx)) != windows.end ())
-      {
-        win->second->uimenu_update (gh, id);
-      }
-  }
-  
-  void do_update_canvas (int idx, graphics_handle ca)
-  {
-    wm_iterator win;
-    if ((win = windows.find (idx)) != windows.end ())
-      {
-        if (ca.ok ())
-          win->second->show_canvas ();
-        else
-          win->second->hide_canvas ();
-      }
-  }
-  
-  
-  // FIXME -- default size should be configurable.
-  void default_size (int& x, int& y, int& w, int& h)
-  {
-    x = 0;
-    y = 0;
-    w = 640;
-    h = 480;
-  }
-
-  static int str2idx (const caseless_str clstr)
-  {
-    int ind;
-    if (clstr.find (fltk_idx_header,0) == 0)
-      {
-        std::istringstream istr (clstr.substr (fltk_idx_header.size ()));
-        if (istr >> ind)
-          return ind;
-      }
-    error ("fltk_backend: could not recognize fltk index");
-    return -1;
-  }
-
-  void idx2figprops (int idx, figure::properties& fp)
-  {
-    std::ostringstream ind_str;
-    ind_str << fltk_idx_header << idx;
-    fp.set___plot_stream__ (ind_str.str ());
-  }
-
-  static int figprops2idx (const figure::properties& fp)
-  {
-    if (fp.get___backend__ () == FLTK_BACKEND_NAME)
-      {
-        octave_value ps = fp.get___plot_stream__ ();
-        if (ps.is_string ())
-          return str2idx (ps.string_value ());
-        else
-          return 0;
-      }
-    error ("fltk_backend:: figure is not fltk");
-    return -1;
-  }
-
-  static int hnd2idx (const double h)
-  {
-    graphics_object fobj = gh_manager::get_object (h);
-    if (fobj &&  fobj.isa ("figure"))
-      {
-        figure::properties& fp =
-          dynamic_cast<figure::properties&> (fobj.get_properties ());
-        return figprops2idx (fp);
-      }
-    error ("fltk_backend:: H is not a figure");
-    return -1;
-  }
-
-  static int hnd2idx (const graphics_handle& fh)
-  {
-    return hnd2idx (fh.value ());
-  }
-};
-
-figure_manager *figure_manager::instance = 0;
-
-std::string figure_manager::fltk_idx_header="fltk index=";
-int figure_manager::curr_index = 1;
-
-static bool backend_registered = false;
-
-static int
-__fltk_redraw__ (void)
-{
-  if (backend_registered)
-    {
-      // we scan all figures and add those which use FLTK as a backend
-      graphics_object obj = gh_manager::get_object (0);
-      if (obj && obj.isa ("root"))
-        {
-          base_properties& props = obj.get_properties ();
-          Matrix children = props.get_all_children ();
-
-          for (octave_idx_type n = 0; n < children.numel (); n++)
-            {
-              graphics_object fobj = gh_manager::get_object (children (n));
-              if (fobj && fobj.isa ("figure"))
-                {
-                  figure::properties& fp =
-                      dynamic_cast<figure::properties&> (fobj.get_properties ());
-                  if (fp.get___backend__ () == FLTK_BACKEND_NAME)
-                    figure_manager::new_window (fp);
-                }
-            }
-        }
-
-      // it seems that we have to call Fl::check twice to get everything drawn
-      Fl::check ();
-      Fl::check ();
-    }
-
-  return 0;
-}
-
-class fltk_backend : public base_graphics_backend
-{
-public:
-  fltk_backend (void)
-    : base_graphics_backend (FLTK_BACKEND_NAME) { }
-
-  ~fltk_backend (void) { }
-
-  bool is_valid (void) const { return true; }
-
-  void finalize (const graphics_object& go)
-  {
-    if (go.isa ("figure"))
-      {
-        octave_value ov = go.get (caseless_str ("__plot_stream__"));
-
-        if (! ov.is_empty ())
-          figure_manager::delete_window (ov.string_value ());
-      }
-  }
-
-  void uimenu_set_fltk_label(graphics_object uimenu_obj)
-  {
-    if (uimenu_obj.valid_object ())
-      {
-        uimenu::properties& uimenup =
-          dynamic_cast<uimenu::properties&> (uimenu_obj.get_properties ());
-        std::string fltk_label = uimenup.get_label ();  
-        graphics_object go = gh_manager::get_object (uimenu_obj.get_parent ());
-        if (go.isa ("uimenu"))
-          fltk_label = dynamic_cast<const uimenu::properties&> (go.get_properties ()).get_fltk_label ()
-                     + "/"
-                     + fltk_label;
-        else if (go.isa ("figure"))
-          ;
-        else
-          error("unexpected parent object\n");
-        
-        uimenup.set_fltk_label(fltk_label);
-      }
-  }
-  
-  void update (const graphics_object& go, int id)
-  {
-    if (go.isa ("figure"))
-      {
-        octave_value ov = go.get (caseless_str ("__plot_stream__"));
-        
-        if (! ov.is_empty ())
-          {
-            const figure::properties& fp =
-              dynamic_cast<const figure::properties&> (go.get_properties ());
-            
-            switch (id)
-              {
-                case base_properties::ID_VISIBLE:
-                  figure_manager::toggle_window_visibility (ov.string_value (), fp.is_visible ());
-                  break;
-                case figure::properties::ID_MENUBAR:
-		  figure_manager::toggle_menubar_visibility (ov.string_value (), fp.menubar_is("figure"));
-                  break;
-                case figure::properties::ID_NAME:
-		case figure::properties::ID_CURRENTAXES:
-                  figure_manager::update_canvas (go.get_handle (), fp.get_currentaxes ());
-                  break;
-                case figure::properties::ID_NUMBERTITLE:
-                  figure_manager::set_name (ov.string_value ());
-                  break;
-              }
-          }
-      }
-    else if (go.isa ("uimenu"))
-      {
-        if (id == uimenu::properties::ID_LABEL)
-          uimenu_set_fltk_label (go);
-        
-        graphics_object fig = go.get_ancestor("figure");
-        figure_manager::uimenu_update(fig.get_handle (), go.get_handle (), id);
-      }
-  }
-
-  void redraw_figure (const graphics_object& go) const
-  {
-    figure_manager::mark_modified (go.get_handle ());
-
-    __fltk_redraw__ ();
-  }
-
-  void print_figure (const graphics_object& go,
-                     const std::string& term,
-                     const std::string& file, bool /*mono*/,
-                     const std::string& /*debug_file*/) const 
-  { 
-    int fid;
-    std::istringstream istr (file);
-    if (istr >> fid)
-      {
-        figure_manager::print (go.get_handle (), fid, term);
-        redraw_figure (go);
-      }
-    else
-      error ("fltk_backend: filename should be fid");
-  }
-
-  Matrix get_canvas_size (const graphics_handle& fh) const
-  {
-    return figure_manager::get_size (fh);
-  }
-
-  double get_screen_resolution (void) const
-  {
-    // FLTK doesn't give this info.
-    return 72.0;
-  }
-
-  Matrix get_screen_size (void) const
-  {
-    Matrix sz (1, 2, 0.0);
-    sz(0) = Fl::w ();
-    sz(1) = Fl::h ();
-    return sz;
-  }
-};
-
-DEFUN_DLD (__fltk_redraw__, , , "")
-{
-  __fltk_redraw__ ();
-
-  return octave_value ();
-}
-
-// Initialize the fltk backend.
-
-DEFUN_DLD (__init_fltk__, , , "")
-{
-  static bool remove_fltk_registered = false;
-
-  if (! backend_registered)
-    {
-      mlock ();
-
-      graphics_backend::register_backend (new fltk_backend);
-      backend_registered = true;
-      
-      octave_value_list args;
-      args(0) = "__fltk_redraw__";
-      feval ("add_input_event_hook", args, 0);
-
-      if (! remove_fltk_registered)
-        {
-          octave_add_atexit_function ("__remove_fltk__");
-
-          remove_fltk_registered = true;
-        }
-    }
-
-  octave_value retval;
-  return retval;
-}
-
-
-// Delete the fltk backend.
-
-DEFUN_DLD (__remove_fltk__, , , "")
-{
-  if (backend_registered)
-    {
-      munlock ("__init_fltk__");
-
-      figure_manager::close_all ();
-      graphics_backend::unregister_backend (FLTK_BACKEND_NAME);
-      backend_registered = false;
-
-      octave_value_list args;
-      args(0) = "__fltk_redraw__";
-      feval ("remove_input_event_hook", args, 0);
-
-      // FIXME ???
-      Fl::wait (fltk_maxtime);
-    }
-
-  octave_value retval;
-  return retval;        
-}
-
-DEFUN_DLD (__fltk_maxtime__, args, ,"")
-{
-  octave_value retval = fltk_maxtime;
-
-  if (args.length () == 1)
-    {
-      if (args(0).is_real_scalar ())
-        fltk_maxtime = args(0).double_value ();
-      else
-        error ("argument must be a real scalar");
-    }
-
-  return retval;
-}
-
-DEFUN_DLD (fltk_mouse_wheel_zoom, args, ,
-  "-*- texinfo -*-\n\
-@deftypefn  {Built-in Function} {@var{speed} =} fltk_mouse_wheel_zoom ()\n\
-@deftypefnx {Built-in Function} {} fltk_mouse_wheel_zoom (@var{speed})\n\
-Query or set the mouse wheel zoom factor in the fltk backend.\n\
-@end deftypefn")
-{
-  octave_value retval = wheel_zoom_speed;
-
-  if (args.length () == 1)
-    {
-      if (args(0).is_real_scalar ())
-        wheel_zoom_speed = args(0).double_value ();
-      else
-        error ("fltk_mouse_wheel_zoom: SPEED must be a real scalar");
-    }
-
-  return retval;
-}
-
-DEFUN_DLD (fltk_gui_mode, args, ,
-  "-*- texinfo -*-\n\
-@deftypefn  {Built-in Function} {@var{mode} =} fltk_gui_mode ()\n\
-@deftypefnx {Built-in Function} {} fltk_gui_mode (@var{mode})\n\
-Query or set the GUI mode for the fltk backend.\n\
-The @var{mode} argument can be one of the following strings:\n\
-@table @asis\n\
-@item '2d'\n\
-Allows panning and zooming of current axes.\n\
-\n\
-@item '3d'\n\
-Allows rotating and zooming of current axes.\n\
-\n\
-@item 'none'\n\
-Mouse inputs have no effect.\n\
-@end table\n\
-@end deftypefn")
-{
-  caseless_str mode_str;
-
-  if (gui_mode == pan_zoom)
-    mode_str = "2d";
-  else if (gui_mode == rotate_zoom)
-    mode_str = "3d";
-  else
-    mode_str = "none";
-  
-  
-  bool failed = false;
-  
-  if (args.length () == 1)
-    {
-      if (args(0).is_string ())
-        {
-          mode_str = args(0).string_value ();
-
-          if (mode_str.compare ("2d"))
-            gui_mode = pan_zoom;
-          else if (mode_str.compare ("3d"))
-            gui_mode = rotate_zoom;
-          else if (mode_str.compare ("none"))
-            gui_mode = none;
-          else
-            failed = true;
-        }
-      else
-        failed = true;
-    }
-    
-  if (failed)
-    error ("MODE must be one of the strings: ""2D"", ""3D"", or ""None"".");
-  
-  
-  return octave_value(mode_str);
-}
-
-#include "file-ops.h"
-DEFUN_DLD (__fltk_uigetfile__, args, ,
-  "-*- texinfo -*-\n\
-@deftypefn {Built-in Function} {} __fltk_uigetfile__ (@dots{})\n\
-Undocumented internal function.\n\
-@end deftypefn")
-{
-  // This function should be called by uigetfile.m
-  // Error checking should be done in uigetfile.m!
-  //
-  // Expected argument list
-  // args(0) ... FileFilter in fltk format
-  // args(1) ... Title
-  // args(2) ... Default Filename
-  // args(3) ... PostionValue [x,y] 
-  // args(4) ... SelectValue "on"/"off"/"dir"/"create"
-  
-  std::string file_filter, title, default_name, multi;
-  if (args(0).is_string ())
-    file_filter = args(0).string_value();
-    
-  if (args(1).is_string ())
-    title = args(1).string_value();
-    
-  if (args(2).is_string ())
-    default_name = args(2).string_value();
-    
-  if (args(3).is_real_matrix ())
-    Matrix pos = args(3).matrix_value();
-    
-  int multi_type = Fl_File_Chooser::SINGLE;
-  std::string flabel = "Filename:";
-  if (args(4).is_string ())
-    {
-      multi = args(4).string_value();
-      if (multi == "on")
-        multi_type = Fl_File_Chooser::MULTI;
-      else if (multi == "dir")
-        {
-          multi_type = Fl_File_Chooser::DIRECTORY;
-          flabel = "Directory:";
-        }
-      else if (multi == "create")
-        multi_type = Fl_File_Chooser::CREATE;
-    }
-  
-  Fl_File_Chooser::filename_label = flabel.c_str ();  
-  Fl_File_Chooser *fc = new Fl_File_Chooser(default_name.c_str (), file_filter.c_str (), multi_type, title.c_str ());
-  fc->preview(0);
-  
-  if (multi_type == Fl_File_Chooser::CREATE)
-    fc->ok_label("Save");
-  
-  fc->show();
-  while (fc->shown ())
-        { Fl::wait (); }
-
-  octave_value_list fargs, retval;
-  
-  retval(0) = octave_value(0);
-  retval(1) = octave_value(0);
-  retval(2) = octave_value(0);
-  
-  if (fc->value() != NULL)
-    {
-      int file_count = fc->count ();
-      std::string fname;
-      std::string sep = file_ops::dir_sep_str ();
-      std::size_t idx;
-      
-      if ((file_count == 1) && (multi_type != Fl_File_Chooser::DIRECTORY))
-        {
-          fname = fc->value ();    
-          idx = fname.find_last_of(sep);
-          retval(0) = fname.substr(idx + 1);
-        }
-      else  
-        {
-          Cell file_cell = Cell(file_count, 1);
-          for (octave_idx_type n = 1; n <= file_count; n++)
-            {
-              fname = fc->value (n);    
-              idx = fname.find_last_of(sep);
-              file_cell(n - 1) = fname.substr(idx + 1);
-            }
-          retval(0) = file_cell;
-        }
-        
-      if (multi_type == Fl_File_Chooser::DIRECTORY)
-        retval(0) = std::string(fc->value ());
-      else
-        {
-          retval(1) = std::string(fc->directory ());
-          retval(2) = fc->filter_value();
-        }
-    }
-  
-  return retval;
-}
-
-#endif
--- a/src/DLD-FUNCTIONS/module-files	Wed Jan 19 21:16:13 2011 -0800
+++ b/src/DLD-FUNCTIONS/module-files	Thu Jan 20 02:29:57 2011 -0500
@@ -3,6 +3,7 @@
 __dispatch__.cc
 __dsearchn__.cc
 __glpk__.cc
+__init_fltk__.cc
 __lin_interpn__.cc
 __magick_read__.cc
 __pchip_deriv__.cc
@@ -24,9 +25,9 @@
 dasrt.cc
 dassl.cc
 det.cc
-dot.cc
 dlmread.cc
 dmperm.cc
+dot.cc
 eig.cc
 eigs.cc
 fft.cc
@@ -35,7 +36,6 @@
 fftw.cc
 filter.cc
 find.cc
-fltk_backend.cc
 gammainc.cc
 gcd.cc
 getgrent.cc
--- a/src/Makefile.am	Wed Jan 19 21:16:13 2011 -0800
+++ b/src/Makefile.am	Thu Jan 20 02:29:57 2011 -0500
@@ -618,7 +618,7 @@
 lex.lo lex.o oct-parse.lo oct-parse.o: \
   AM_CXXFLAGS := $(filter-out -Wold-style-cast, $(AM_CXXFLAGS))
 
-fltk_backend.lo fltk_backend.o: \
+__init_fltk__.lo __init_fltk__.o: \
   AM_CXXFLAGS := $(filter-out $(DLL_CXXDEFS), $(AM_CXXFLAGS) $(GRAPHICS_CFLAGS))
 
 # XERBLA = ../libcruft/blas-xtra/xerbla.o
@@ -818,9 +818,9 @@
 DLD_FUNCTIONS___glpk___la_CPPFLAGS = $(AM_CPPFLAGS) $(GLPK_CPPFLAGS)
 DLD_FUNCTIONS___glpk___la_LIBADD += $(GLPK_LDFLAGS) $(GLPK_LIBS)
 
-DLD-FUNCTIONS/fltk_backend.df: CPPFLAGS += $(GRAPHICS_CFLAGS) $(FT2_CPPFLAGS)
-DLD_FUNCTIONS_fltk_backend_la_CPPFLAGS = $(AM_CPPFLAGS) $(GRAPHICS_CFLAGS) $(FT2_CPPFLAGS)
-DLD_FUNCTIONS_fltk_backend_la_LIBADD += $(GRAPHICS_LDFLAGS) $(GRAPHICS_LIBS) $(FT2_LDFLAGS) $(FT2_LIBS)
+DLD-FUNCTIONS/__init_fltk__.df: CPPFLAGS += $(GRAPHICS_CFLAGS) $(FT2_CPPFLAGS)
+DLD_FUNCTIONS___init_fltk___la_CPPFLAGS = $(AM_CPPFLAGS) $(GRAPHICS_CFLAGS) $(FT2_CPPFLAGS)
+DLD_FUNCTIONS___init_fltk___la_LIBADD += $(GRAPHICS_LDFLAGS) $(GRAPHICS_LIBS) $(FT2_LDFLAGS) $(FT2_LIBS)
 
 DLD-FUNCTIONS/amd.df: CPPFLAGS += $(SPARSE_XCPPFLAGS)
 DLD_FUNCTIONS_amd_la_CPPFLAGS = $(AM_CPPFLAGS) $(SPARSE_XCPPFLAGS)
--- a/src/gl-render.cc	Wed Jan 19 21:16:13 2011 -0800
+++ b/src/gl-render.cc	Thu Jan 20 02:29:57 2011 -0500
@@ -564,7 +564,7 @@
 void
 opengl_renderer::draw_figure (const figure::properties& props)
 {
-  backend = props.get_backend ();
+  toolkit = props.get_toolkit ();
 
   // Initialize OpenGL context
 
@@ -3245,7 +3245,7 @@
     return 0;
 
   unsigned int ID = glGenLists (1);
-  double sz = size * backend.get_screen_resolution () / 72.0;
+  double sz = size * toolkit.get_screen_resolution () / 72.0;
 
   // constants for the * marker
   const double sqrt2d4 = 0.35355339059327;
--- a/src/gl-render.h	Wed Jan 19 21:16:13 2011 -0800
+++ b/src/gl-render.h	Thu Jan 20 02:29:57 2011 -0500
@@ -137,8 +137,8 @@
                                  bool filled) const;
 
 private:
-  // the backend associated with the figure being rendered
-  graphics_backend backend;
+  // The graphics toolkit associated with the figure being rendered.
+  graphics_toolkit toolkit;
 
   // axes transformation data
   graphics_xform xform;
--- a/src/graphics.cc	Wed Jan 19 21:16:13 2011 -0800
+++ b/src/graphics.cc	Thu Jan 20 02:29:57 2011 -0500
@@ -765,15 +765,15 @@
   if (do_set (v))
     {
 
-      // notify backend
+      // Notify graphics toolkit.
       if (id >= 0)
         {
           graphics_object go = gh_manager::get_object (parent);
           if (go)
             {
-              graphics_backend backend = go.get_backend();
-              if (backend)
-                backend.update (go, id);
+              graphics_toolkit toolkit = go.get_toolkit ();
+              if (toolkit)
+                toolkit.update (go, id);
             }
         }
 
@@ -1871,14 +1871,14 @@
 
               bp.execute_deletefcn ();
 
-              // notify backend
-              graphics_backend backend = p->second.get_backend ();
-              if (backend)
-                backend.finalize (p->second);
+              // Notify graphics toolkit.
+              graphics_toolkit toolkit = p->second.get_toolkit ();
+              if (toolkit)
+                toolkit.finalize (p->second);
 
               // Note: this will be valid only for first explicitly 
               // deleted object.  All its children will then have an
-              // unknown backend.
+              // unknown graphics toolkit.
 
               // Graphics handles for non-figure objects are negative
               // integers plus some random fractional part.  To avoid
@@ -2051,7 +2051,7 @@
 // ---------------------------------------------------------------------
 
 void
-base_graphics_backend::update (const graphics_handle& h, int id)
+base_graphics_toolkit::update (const graphics_handle& h, int id)
 {
   graphics_object go = gh_manager::get_object (h);
 
@@ -2059,7 +2059,7 @@
 }
 
 void
-base_graphics_backend::initialize (const graphics_handle& h)
+base_graphics_toolkit::initialize (const graphics_handle& h)
 {
   graphics_object go = gh_manager::get_object (h);
 
@@ -2067,7 +2067,7 @@
 }
 
 void
-base_graphics_backend::finalize (const graphics_handle& h)
+base_graphics_toolkit::finalize (const graphics_handle& h)
 {
   graphics_object go = gh_manager::get_object (h);
 
@@ -2244,15 +2244,15 @@
     obj.update_axis_limits (axis_type, h);
 }
 
-graphics_backend
-base_properties::get_backend (void) const
+graphics_toolkit
+base_properties::get_toolkit (void) const
 {
   graphics_object go = gh_manager::get_object (get_parent ());
 
   if (go)
-    return go.get_backend ();
+    return go.get_toolkit ();
   else
-    return graphics_backend ();
+    return graphics_toolkit ();
 }
 
 void
@@ -2291,13 +2291,13 @@
 
 // ---------------------------------------------------------------------
 
-class gnuplot_backend : public base_graphics_backend
+class gnuplot_toolkit : public base_graphics_toolkit
 {
 public:
-  gnuplot_backend (void)
-      : base_graphics_backend ("gnuplot") { }
-
-  ~gnuplot_backend (void) { }
+  gnuplot_toolkit (void)
+      : base_graphics_toolkit ("gnuplot") { }
+
+  ~gnuplot_toolkit (void) { }
 
   bool is_valid (void) const { return true; }
 
@@ -2402,16 +2402,16 @@
     }
 };
 
-graphics_backend
-graphics_backend::default_backend (void)
-{
-  if (available_backends.size () == 0)
-    register_backend (new gnuplot_backend ());
-
-  return available_backends["gnuplot"];
-}
-
-std::map<std::string, graphics_backend> graphics_backend::available_backends;
+graphics_toolkit
+graphics_toolkit::default_toolkit (void)
+{
+  if (available_toolkits.size () == 0)
+    register_toolkit (new gnuplot_toolkit ());
+
+  return available_toolkits["gnuplot"];
+}
+
+std::map<std::string, graphics_toolkit> graphics_toolkit::available_toolkits;
 
 // ---------------------------------------------------------------------
 
@@ -3816,7 +3816,7 @@
 
       // FIXME -- was this really needed?  When compared to Matlab, it
       // does not seem to be required. Need investigation with concrete
-      // backend to see results visually.
+      // graphics toolkit to see results visually.
       if (false && dowarp)
         af = 1.0 / (xM > yM ? xM : yM);
       else
@@ -5507,8 +5507,8 @@
 {
   handle_map[0] = graphics_object (new root_figure ());
 
-  // Make sure the default backend is registered.
-  graphics_backend::default_backend ();
+  // Make sure the default graphics toolkit is registered.
+  graphics_toolkit::default_toolkit ();
 }
 
 graphics_handle
@@ -5529,10 +5529,10 @@
       if (do_createfcn)
         go->get_properties ().execute_createfcn ();
 
-      // notify backend
-      graphics_backend backend = go->get_backend ();
-      if (backend)
-        backend.initialize (obj);
+      // Notify graphics toolkit.
+      graphics_toolkit toolkit = go->get_toolkit ();
+      if (toolkit)
+        toolkit.initialize (obj);
     }
   else
     error ("gh_manager::do_make_graphics_handle: invalid object type `%s'",
@@ -5551,10 +5551,10 @@
 
   handle_map[h] = obj;
 
-  // notify backend
-  graphics_backend backend = go->get_backend ();
-  if (backend)
-    backend.initialize (obj);
+  // Notify graphics toolkit.
+  graphics_toolkit toolkit = go->get_toolkit ();
+  if (toolkit)
+    toolkit.initialize (obj);
   
   return h;
 }
@@ -6734,15 +6734,15 @@
   return retval;
 }
 
-DEFUN (available_backends, , ,
+DEFUN (available_graphics_toolkits, , ,
    "-*- texinfo -*-\n\
-@deftypefn {Built-in Function} {} available_backends ()\n\
-Return a cell array of registered graphics backends.\n\
+@deftypefn {Built-in Function} {} available_graphiscs_toolkits ()\n\
+Return a cell array of registered graphics toolkits.\n\
 @end deftypefn")
 {
   gh_manager::autolock guard;
 
-  return octave_value (graphics_backend::available_backends_list ());
+  return octave_value (graphics_toolkit::available_toolkits_list ());
 }
 
 DEFUN (drawnow, args, ,
@@ -6798,7 +6798,7 @@
                         {
                           gh_manager::unlock ();
 
-                          fprops.get_backend ().redraw_figure (go);
+                          fprops.get_toolkit ().redraw_figure (go);
 
                           gh_manager::lock ();
                         }
@@ -6879,7 +6879,7 @@
 
                               gh_manager::unlock ();
 
-                              go.get_backend ()
+                              go.get_toolkit ()
                                 .print_figure (go, term, file, mono, debug_file);
 
                               gh_manager::lock ();
--- a/src/graphics.h.in	Wed Jan 19 21:16:13 2011 -0800
+++ b/src/graphics.h.in	Thu Jan 20 02:29:57 2011 -0500
@@ -348,7 +348,7 @@
 
   void set_id (int d) { id = d; }
 
-  // Sets property value, notifies backend.
+  // Sets property value, notifies graphics toolkit.
   // If do_run is true, runs associated listeners.
   bool set (const octave_value& v, bool do_run = true);
   
@@ -1764,19 +1764,19 @@
 
 // ---------------------------------------------------------------------
 
-class graphics_backend;
+class graphics_toolkit;
 class graphics_object;
 
-class base_graphics_backend
+class base_graphics_toolkit
 {
 public:
-  friend class graphics_backend;
+  friend class graphics_toolkit;
 
 public:
-  base_graphics_backend (const std::string& nm)
+  base_graphics_toolkit (const std::string& nm)
       : name (nm), count (0) { }
 
-  virtual ~base_graphics_backend (void) { }
+  virtual ~base_graphics_toolkit (void) { }
 
   std::string get_name (void) const { return name; }
 
@@ -1809,26 +1809,26 @@
     }
 
   // Callback function executed when the given graphics object
-  // changes.  This allows the grahpics backend to act on property
+  // changes.  This allows the grahpics toolkit to act on property
   // changes if needed.
   virtual void update (const graphics_object&, int)
-    { gripe_invalid ("base_graphics_backend::update"); }
+    { gripe_invalid ("base_graphics_toolkit::update"); }
 
   void update (const graphics_handle&, int);
   
   // Callback function executed when the given graphics object is
-  // created.  This allows the graphics backend to do backend-specific
+  // created.  This allows the graphics toolkit to do toolkit-specific
   // initializations for a newly created object.
   virtual void initialize (const graphics_object&)
-    { gripe_invalid ("base_graphics_backend::initialize"); }
+    { gripe_invalid ("base_graphics_toolkit::initialize"); }
 
   void initialize (const graphics_handle&);
 
   // Callback function executed just prior to deleting the given
-  // graphics object.  This allows the graphics backend to perform
-  // backend-specific cleanup operations before an object is deleted.
+  // graphics object.  This allows the graphics toolkit to perform
+  // toolkit-specific cleanup operations before an object is deleted.
   virtual void finalize (const graphics_object&)
-    { gripe_invalid ("base_graphics_backend::finalize"); }
+    { gripe_invalid ("base_graphics_toolkit::finalize"); }
 
   void finalize (const graphics_handle&);
 
@@ -1840,38 +1840,38 @@
   void gripe_invalid (const std::string& fname) const
     {
       if (! is_valid ())
-        error ("%s: invalid graphics backend", fname.c_str ());
+        error ("%s: invalid graphics toolkit", fname.c_str ());
     }
 };
 
-class graphics_backend
+class graphics_toolkit
 {
 public:
-  graphics_backend (void)
-      : rep (new base_graphics_backend ("unknown"))
+  graphics_toolkit (void)
+      : rep (new base_graphics_toolkit ("unknown"))
     {
       rep->count++;
     }
 
-  graphics_backend (base_graphics_backend* b)
+  graphics_toolkit (base_graphics_toolkit* b)
       : rep (b)
     {
       rep->count++;
     }
 
-  graphics_backend (const graphics_backend& b)
+  graphics_toolkit (const graphics_toolkit& b)
       : rep (b.rep)
     {
       rep->count++;
     }
 
-  ~graphics_backend (void)
+  ~graphics_toolkit (void)
     {
       if (--rep->count == 0)
         delete rep;
     }
 
-  graphics_backend& operator = (const graphics_backend& b)
+  graphics_toolkit& operator = (const graphics_toolkit& b)
     {
       if (rep != b.rep)
         {
@@ -1906,66 +1906,71 @@
   Matrix get_screen_size (void) const
     { return rep->get_screen_size (); }
 
-  // Notifies backend that object't property has changed.
+  // Notifies graphics toolkit that object't property has changed.
   void update (const graphics_object& go, int id)
     { rep->update (go, id); }
   
   void update (const graphics_handle& h, int id)
     { rep->update (h, id); }
 
-  // Notifies backend that new object was created.
+  // Notifies graphics toolkit that new object was created.
   void initialize (const graphics_object& go)
     { rep->initialize (go); }
   
   void initialize (const graphics_handle& h)
     { rep->initialize (h); }
   
-  // Notifies backend that object was destroyed.
+  // Notifies graphics toolkit that object was destroyed.
   // This is called only for explicitly deleted object. Children are
-  // deleted implicitly and backend isn't notified.
+  // deleted implicitly and graphics toolkit isn't notified.
   void finalize (const graphics_object& go)
     { rep->finalize (go); }
   
   void finalize (const graphics_handle& h)
     { rep->finalize (h); }
   
-  OCTINTERP_API static graphics_backend default_backend (void);
-
-  static void register_backend (const graphics_backend& b)
-    { available_backends[b.get_name ()] = b; }
-
-  static void unregister_backend (const std::string& name)
-    { available_backends.erase (name); }
-
-  static graphics_backend find_backend (const std::string& name)
+  OCTINTERP_API static graphics_toolkit default_toolkit (void);
+
+  static void register_toolkit (const graphics_toolkit& b)
+    { available_toolkits[b.get_name ()] = b; }
+
+  static void unregister_toolkit (const std::string& name)
+    { available_toolkits.erase (name); }
+
+  static graphics_toolkit find_toolkit (const std::string& name)
   {
-    const_available_backends_iterator p = available_backends.find (name);
-
-    if (p != available_backends.end ())
+    const_available_toolkits_iterator p = available_toolkits.find (name);
+
+    if (p != available_toolkits.end ())
       return p->second;
     else
-      return default_backend ();
+      return default_toolkit ();
   }
 
-  static Cell available_backends_list (void)
+  static Cell available_toolkits_list (void)
   {
-    Cell m (1 , available_backends.size ());
-    const_available_backends_iterator p;
+    Cell m (1 , available_toolkits.size ());
+    const_available_toolkits_iterator p;
     int i;
     
-    for (i = 0,p = available_backends.begin (); p !=  available_backends.end (); p++,i++)
+    for (i = 0, p = available_toolkits.begin ();
+         p !=  available_toolkits.end (); p++, i++)
       m(i) = p->first;
 
     return m;
   }
 
 private:
-  base_graphics_backend *rep;
-
-  static OCTINTERP_API std::map<std::string, graphics_backend> available_backends;
-
-  typedef std::map<std::string, graphics_backend>::iterator available_backends_iterator;
-  typedef std::map<std::string, graphics_backend>::const_iterator const_available_backends_iterator;
+  base_graphics_toolkit *rep;
+
+  static OCTINTERP_API std::map<std::string, graphics_toolkit>
+    available_toolkits;
+
+  typedef std::map<std::string, graphics_toolkit>::iterator
+    available_toolkits_iterator;
+
+  typedef std::map<std::string, graphics_toolkit>::const_iterator
+    const_available_toolkits_iterator;
 };
 
 // ---------------------------------------------------------------------
@@ -2037,7 +2042,7 @@
     mark_modified ();
   }
 
-  virtual graphics_backend get_backend (void) const;
+  virtual graphics_toolkit get_toolkit (void) const;
 
   virtual Matrix get_boundingbox (bool /*internal*/ = false) const
     { return Matrix (1, 4, 0.0); }
@@ -2355,14 +2360,14 @@
     return type () == go_name;
   }
 
-  virtual graphics_backend get_backend (void) const
+  virtual graphics_toolkit get_toolkit (void) const
   {
     if (valid_object ())
-      return get_properties ().get_backend ();
+      return get_properties ().get_toolkit ();
     else
       {
-        error ("base_graphics_object::get_backend: invalid graphics object");
-        return graphics_backend ();
+        error ("base_graphics_object::get_toolkit: invalid graphics object");
+        return graphics_toolkit ();
       }
   }
 
@@ -2579,7 +2584,7 @@
   bool is_handle_visible (void) const
   { return get_properties ().is_handle_visible (); }
   
-  graphics_backend get_backend (void) const { return rep->get_backend (); }
+  graphics_toolkit get_toolkit (void) const { return rep->get_toolkit (); }
 
   void add_property_listener (const std::string& nm, const octave_value& v,
                               listener_mode mode = POSTSET)
@@ -2753,44 +2758,44 @@
 
     void set_visible (const octave_value& val);
 
-    graphics_backend get_backend (void) const
+    graphics_toolkit get_toolkit (void) const
       {
-        if (! backend)
-          backend = graphics_backend::default_backend ();
-
-        return backend;
+        if (! toolkit)
+          toolkit = graphics_toolkit::default_toolkit ();
+
+        return toolkit;
       }
 
-    void set_backend (const graphics_backend& b) 
+    void set_toolkit (const graphics_toolkit& b) 
     { 
-      if (backend)
-        backend.finalize (__myhandle__);
-      backend = b; 
-      __backend__ = b.get_name ();
+      if (toolkit)
+        toolkit.finalize (__myhandle__);
+      toolkit = b; 
+      __graphics_toolkit__ = b.get_name ();
       __plot_stream__ = Matrix ();
       mark_modified ();
     }
 
-    void set___backend__ (const octave_value& val)
+    void set___graphics_toolkit__ (const octave_value& val)
     {
       if (! error_state)
         {
           if (val.is_string ())
             {
               std::string nm = val.string_value ();
-              graphics_backend b = graphics_backend::find_backend (nm);
+              graphics_toolkit b = graphics_toolkit::find_toolkit (nm);
               if (b.get_name () != nm)
                 {
-                  error ("set___backend__: invalid backend");
+                  error ("set___graphics_toolkit__: invalid graphics toolkit");
                 }
               else
                 {
-                  set_backend (b);
+                  set_toolkit (b);
                   mark_modified ();
                 }
             }
           else
-            error ("set___backend__ must be a string");
+            error ("set___graphics_toolkit__ must be a string");
         }
     }
 
@@ -2858,7 +2863,7 @@
       string_property xvisual , ""
       radio_property xvisualmode , "{auto}|manual"
       callback_property buttondownfcn , Matrix ()
-      string_property __backend__ s , "gnuplot"
+      string_property __graphics_toolkit__ s , "gnuplot"
     END_PROPERTIES
     
   protected:
@@ -2873,7 +2878,7 @@
       }
 
   private:
-    mutable graphics_backend backend;
+    mutable graphics_toolkit toolkit;
   };
 
 private:
@@ -4453,13 +4458,13 @@
   // created.
   std::list<graphics_handle> figure_list;
 
-  // The lock for accessing the graphics sytsem
+  // The lock for accessing the graphics sytsem.
   octave_mutex graphics_lock;
 
-  // The list of event queued by backends
+  // The list of events queued by graphics toolkits.
   std::list<graphics_event> event_queue;
 
-  // The stack of callback objects
+  // The stack of callback objects.
   std::list<graphics_object> callback_objects;
 
   graphics_handle get_handle (const std::string& go_name);