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/* -*-c++-*- */
/* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
 * Copyright 2008-2013 Pelican Mapping
 * http://osgearth.org
 *
 * osgEarth is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 */
#ifndef OSGEARTHQT_VIEW_WIDGET_H
#define OSGEARTHQT_VIEW_WIDGET_H 1

#include <osgEarthQt/Common>

#include <osgEarth/Map>

#include <osgQt/GraphicsWindowQt>
#include <osgViewer/ViewerBase>

#include <QtCore/QTimer>

namespace osgEarth { namespace QtGui 
{
    using namespace osgEarth;

    /**
     * Qt widget that encapsulates an osgViewer::View.
     *
     * There is nothing osgEarth-specific about this class; rather we
     * provide it for convenience. The use case is rendering the map node
     * (or other graph) in multiple Qt windows with a single CompositeViewer.
     */
    class OSGEARTHQT_EXPORT ViewWidget : public osgQt::GLWidget
    {
    public:
        /**
         * Constructs a new ViewWidget, attaching an existing view.
         *
         * @param[in ] view   View to attach to this widget. The widget will install
         *             a new camera in the view. (NOTE: this widget does not take
         *             ownership of the View. You are still respsonsile for its
         *             destruction)
         * @param[in ] gcToShare Graphics context to share with this new view.
         *             Usually you should just leave this NULL
         */
        ViewWidget(osgViewer::View* view, osg::GraphicsContext* gcToShare =0L);

        /**
         * Access the underlying view.
         */
        osgViewer::View* getView() { return _view.get(); }

        /** dtor */
        virtual ~ViewWidget();

    protected:

        void paintEvent( QPaintEvent* );

    private:

        void init( osg::GraphicsContext* gc );
        osg::GraphicsContext* createOrShareGC(osg::GraphicsContext* gc);

        osg::observer_ptr<osgViewer::View> _view;
        
    };
} }

#endif // OSGEARTHQT_VIEW_WIDGET_H