--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libgui/graphics/qt-graphics-toolkit.h	Fri Aug 02 12:18:48 2019 -0500
@@ -0,0 +1,94 @@
+/*
+
+Copyright (C) 2011-2019 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
+<https://www.gnu.org/licenses/>.
+
+*/
+
+#if ! defined (octave_qt_graphics_toolkit_h)
+#define octave_qt_graphics_toolkit_h 1
+
+#include <QObject>
+
+#include "event-manager.h"
+#include "graphics.h"
+
+namespace octave
+{
+  class interpreter;
+}
+
+namespace QtHandles
+{
+  class Object;
+  class ObjectFactory;
+  class ObjectProxy;
+
+  class qt_graphics_toolkit : public QObject, public base_graphics_toolkit
+  {
+    Q_OBJECT
+
+  public:
+
+    qt_graphics_toolkit (octave::interpreter& interp);
+
+    ~qt_graphics_toolkit (void);
+
+    bool is_valid (void) const { return true; }
+
+    void redraw_figure (const graphics_object& h) const;
+
+    void show_figure (const graphics_object& h) const;
+
+    void update (const graphics_object& obj, int pId);
+
+    bool initialize (const graphics_object& obj);
+
+    void finalize (const graphics_object& obj);
+
+    void print_figure (const graphics_object& go,
+                       const std::string& term,
+                       const std::string& file_cmd,
+                       const std::string& /*debug_file*/) const;
+
+    uint8NDArray get_pixels (const graphics_object& go) const;
+
+    Matrix get_text_extent (const graphics_object& go) const;
+
+    static Object * toolkitObject (const graphics_object& go);
+
+    static ObjectProxy * toolkitObjectProxy (const graphics_object& go);
+
+  signals:
+    void createObject (qt_graphics_toolkit *, double handle);
+
+  public slots:
+
+    void interpreter_event (const octave::fcn_callback& fcn);
+    void interpreter_event (const octave::meth_callback& meth);
+
+  private:
+
+    octave::interpreter& m_interpreter;
+
+    ObjectFactory *m_factory;
+  };
+
+}
+
+#endif