--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libgui/graphics/GLCanvas.cc	Thu Feb 20 14:05:45 2014 -0500
@@ -0,0 +1,174 @@
+/*
+
+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
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "gl-render.h"
+#include "graphics.h"
+
+#include "GLCanvas.h"
+#include "gl-select.h"
+
+//////////////////////////////////////////////////////////////////////////////
+
+namespace QtHandles
+{
+
+//////////////////////////////////////////////////////////////////////////////
+
+GLCanvas::GLCanvas (QWidget* parent, const graphics_handle& handle)
+  : QGLWidget (parent), Canvas (handle)
+{
+  setFocusPolicy (Qt::ClickFocus);
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+GLCanvas::~GLCanvas (void)
+{
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+void GLCanvas::draw (const graphics_handle& handle)
+{
+  graphics_object go = gh_manager::get_object (handle);
+
+  if (go)
+    {
+      opengl_renderer r;
+
+      r.set_viewport (width (), height ());
+      r.draw(go);
+    }
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+graphics_object GLCanvas::selectFromAxes (const graphics_object& ax,
+                                          const QPoint& pt)
+{
+  makeCurrent ();
+
+  if (ax)
+    {
+      opengl_selector s;
+
+      s.set_viewport (width (), height ());
+      return s.select (ax, pt.x (), height () - pt.y ());
+    }
+
+  return graphics_object ();
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+inline void glDrawZoomBox (const QPoint& p1, const QPoint& p2)
+{
+  glVertex2d (p1.x (), p1.y ());
+  glVertex2d (p2.x (), p1.y ());
+  glVertex2d (p2.x (), p2.y ());
+  glVertex2d (p1.x (), p2.y ());
+  glVertex2d (p1.x (), p1.y ());
+}
+
+void GLCanvas::drawZoomBox (const QPoint& p1, const QPoint& p2)
+{
+  glPushMatrix ();
+
+  glMatrixMode (GL_MODELVIEW);
+  glLoadIdentity ();
+
+  glMatrixMode (GL_PROJECTION);
+  glLoadIdentity ();
+  glOrtho (0, width (), height (), 0, 1, -1);
+
+  glPushAttrib (GL_DEPTH_BUFFER_BIT | GL_CURRENT_BIT);
+  glDisable (GL_DEPTH_TEST);
+
+  glBegin (GL_POLYGON);
+  glColor4f (0.45, 0.62, 0.81, 0.1);
+  glDrawZoomBox (p1, p2);
+  glEnd ();
+
+  glBegin (GL_LINE_STRIP);
+  glLineWidth (1.5);
+  glColor4f (0.45, 0.62, 0.81, 0.9);
+  glDrawZoomBox (p1, p2);
+  glEnd ();
+
+  glPopAttrib ();
+  glPopMatrix ();
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+void GLCanvas::paintGL (void)
+{
+  canvasPaintEvent ();
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+void GLCanvas::mouseMoveEvent (QMouseEvent* event)
+{
+  canvasMouseMoveEvent (event);
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+void GLCanvas::mousePressEvent (QMouseEvent* event)
+{
+  canvasMousePressEvent (event);
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+void GLCanvas::mouseReleaseEvent (QMouseEvent* event)
+{
+  canvasMouseReleaseEvent (event);
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+void GLCanvas::keyPressEvent (QKeyEvent* event)
+{
+  if (! canvasKeyPressEvent (event))
+    QGLWidget::keyPressEvent (event);
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+void GLCanvas::keyReleaseEvent (QKeyEvent* event)
+{
+  if (! canvasKeyReleaseEvent (event))
+    QGLWidget::keyReleaseEvent (event);
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+}; // namespace QtHandles