--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libgui/graphics/Backend.cc	Thu Feb 20 14:05:45 2014 -0500
@@ -0,0 +1,224 @@
+/*
+
+Copyright (C) 2011 Michael Goffioul.
+
+This file is part of QtHandles.
+
+Foobar 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.
+
+QtHandles 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 Foobar.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <QApplication>
+#include <QThread>
+
+#include <stdint.h>
+
+#include "Backend.h"
+#include "Logger.h"
+#include "Object.h"
+#include "ObjectFactory.h"
+#include "ObjectProxy.h"
+
+//#if INTPTR_MAX == INT32_MAX
+//# define OCTAVE_PTR_TYPE octave_uint32
+//# define OCTAVE_INTPTR_TYPE uint32_t
+//# define OCTAVE_PTR_SCALAR uint32_scalar_value
+//#else
+# define OCTAVE_PTR_TYPE octave_uint64
+# define OCTAVE_INTPTR_TYPE uint64_t
+# define OCTAVE_PTR_SCALAR uint64_scalar_value
+//#endif
+
+//////////////////////////////////////////////////////////////////////////////
+
+namespace QtHandles
+{
+
+//////////////////////////////////////////////////////////////////////////////
+
+static std::string toolkitObjectProperty (const graphics_object& go)
+{
+  if (go.isa ("figure"))
+    return std::string ("__plot_stream__");
+  else if (go.isa ("uicontrol")
+	   || go.isa ("uipanel")
+	   || go.isa ("uimenu")
+	   || go.isa ("uicontextmenu")
+	   || go.isa ("uitoolbar")
+	   || go.isa ("uipushtool")
+	   || go.isa ("uitoggletool"))
+    return std::string ("__object__");
+  else
+    qCritical ("QtHandles::Backend: no __object__ property known for object "
+	       "of type %s", go.type ().c_str ());
+
+  return std::string ();
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+Backend::Backend (void)
+  : QObject (), base_graphics_toolkit ("qt")
+{
+  ObjectFactory* factory = ObjectFactory::instance ();
+
+  connect (this, SIGNAL (createObject (double)),
+	   factory, SLOT (createObject (double)));
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+Backend::~Backend (void)
+{
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+bool Backend::initialize (const graphics_object& go)
+{
+  if (go.isa ("figure")
+      || go.isa ("uicontrol")
+      || go.isa ("uipanel")
+      || go.isa ("uimenu")
+      || go.isa ("uicontextmenu")
+      || go.isa ("uitoolbar")
+      || go.isa ("uipushtool")
+      || go.isa ("uitoggletool"))
+    {
+      Logger::debug ("Backend::initialize %s from thread %08x",
+		     go.type ().c_str (), QThread::currentThreadId ());
+
+      ObjectProxy* proxy = new ObjectProxy ();
+      graphics_object gObj (go);
+
+      gObj.get_properties ().set(toolkitObjectProperty (go),
+				 OCTAVE_PTR_TYPE ((OCTAVE_INTPTR_TYPE) proxy));
+
+      emit createObject (go.get_handle ().value ());
+
+      return true;
+    }
+
+  return false;
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+void Backend::update (const graphics_object& go, int pId)
+{
+  // Rule out obvious properties we want to ignore.
+  if (pId == figure::properties::ID___PLOT_STREAM__
+      || pId == uicontrol::properties::ID___OBJECT__
+      || pId == uipanel::properties::ID___OBJECT__
+      || pId == uimenu::properties::ID___OBJECT__
+      || pId == uicontextmenu::properties::ID___OBJECT__
+      || pId == uitoolbar::properties::ID___OBJECT__
+      || pId == uipushtool::properties::ID___OBJECT__
+      || pId == uitoggletool::properties::ID___OBJECT__
+      || pId == base_properties::ID___MODIFIED__)
+    return;
+
+  Logger::debug ("Backend::update %s(%d) from thread %08x",
+		 go.type ().c_str (), pId, QThread::currentThreadId ());
+
+  ObjectProxy* proxy = toolkitObjectProxy (go);
+
+  if (proxy)
+    {
+      if (go.isa ("uicontrol")
+	  && pId == uicontrol::properties::ID_STYLE)
+	{
+	  // Special case: we need to recreate the control widget
+	  // associated with the octave graphics_object
+
+	  finalize (go);
+	  initialize (go);
+	}
+      else
+	proxy->update (pId);
+    }
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+void Backend::finalize (const graphics_object& go)
+{
+  Logger::debug ("Backend::finalize %s from thread %08x",
+		 go.type ().c_str (), QThread::currentThreadId ());
+
+  ObjectProxy* proxy = toolkitObjectProxy (go);
+
+  if (proxy)
+    {
+      proxy->finalize ();
+      delete proxy;
+
+      graphics_object gObj (go);
+
+      gObj.get_properties ().set (toolkitObjectProperty (go), Matrix ());
+    }
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+void Backend::redraw_figure (const graphics_object& go) const
+{
+  if (go.get_properties ().is_visible ())
+    {
+      ObjectProxy* proxy = toolkitObjectProxy (go);
+
+      if (proxy)
+	proxy->redraw ();
+    }
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+Object* Backend::toolkitObject (const graphics_object& go)
+{
+  ObjectProxy* proxy = toolkitObjectProxy (go);
+
+  if (proxy)
+    return proxy->object ();
+
+  return 0;
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+ObjectProxy* Backend::toolkitObjectProxy (const graphics_object& go)
+{
+  if (go)
+    {
+      octave_value ov = go.get (toolkitObjectProperty (go));
+
+      if (ov.is_defined () && ! ov.is_empty ())
+	{
+	  OCTAVE_INTPTR_TYPE ptr = ov.OCTAVE_PTR_SCALAR ().value ();
+
+	  if (! error_state)
+	    return reinterpret_cast<ObjectProxy*> (ptr);
+	}
+    }
+
+  return 0;
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+};