From Wang Rui, QWidgetImage class that enables QWidgets to be used as an interactive osg::Image that can be assigned to textures.

src/osgQt/QWidgetImage.cpp

@@ -0,0 +1,65 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2009 Robert Osfield
+ *
+ * This library is open source and may be redistributed and/or modified under
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ *
+ * This library 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
+ * OpenSceneGraph Public License for more details.
+*/
+
+#include <osgQt/QWidgetImage>
+#include <QtGui/QLayout>
+
+namespace osgQt
+{
+
+QWidgetImage::QWidgetImage( QWidget* widget )
+{
+    // make sure we have a valid QApplication before we start creating widgets.
+    getOrCreateQApplication();
+
+    QVBoxLayout* layout = new QVBoxLayout;
+    if (widget) layout->addWidget(widget);
+
+    _widget = new QWidget;
+    _widget->setLayout(layout);
+    _widget->setGeometry(0, 0, 800, 600);  // FIXME: a different size leads to unexpected result
+    _adapter = new QGraphicsViewAdapter(this, _widget.data());
+}
+
+void QWidgetImage::focusWidget(bool focus)
+{
+    QFocusEvent event(focus ? QEvent::FocusIn : QEvent::FocusOut, Qt::OtherFocusReason);
+    QCoreApplication::sendEvent(_widget, &event);
+}
+
+void QWidgetImage::clearWriteBuffer()
+{
+    _adapter->clearWriteBuffer();
+}
+
+void QWidgetImage::render()
+{
+    _adapter->render();
+}
+
+void QWidgetImage::setFrameLastRendered(const osg::FrameStamp* frameStamp)
+{
+    _adapter->setFrameLastRendered(frameStamp);
+}
+
+bool QWidgetImage::sendPointerEvent(int x, int y, int buttonMask)
+{
+    return _adapter->sendPointerEvent(x,y,buttonMask);
+}
+
+bool QWidgetImage::sendKeyEvent(int key, bool keyDown)
+{
+    return _adapter->sendKeyEvent(key, keyDown);
+}
+
+}