visnodestate.h

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#ifndef visnodestate_h
#define visnodestate_h

/*+
________________________________________________________________________

 (C) dGB Beheer B.V.; (LICENSE) http://opendtect.org/OpendTect_license.txt
 Author:        Kristofer Tingdahl
 Date:          Oct 2012
 RCS:           $Id$
________________________________________________________________________


-*/

#include "visosg.h"
#include "objectset.h"
#include "callback.h"

namespace osg { class StateSet; class StateAttribute; }

namespace visBase
{
    
mExpClass(visBase) NodeState : public CallBacker
{ mRefCountImpl(NodeState);
public:

    void                        attachStateSet(osg::StateSet*);
    void                        detachStateSet(osg::StateSet*);
    virtual void                setPixelDensity(float)                  {}

protected:
                                NodeState();
    
    template <class T> T*       addAttribute(T* a) { doAdd(a); return a; }
    template <class T> void     removeAttribute(T* a) {doRemove(a);}
    
private:
    
    void                        doAdd(osg::StateAttribute*);
    void                        doRemove(osg::StateAttribute*);
    virtual void                applyAttribute(osg::StateSet*,
                                               osg::StateAttribute*);
    
    ObjectSet<osg::StateAttribute>      attributes_;
    ObjectSet<osg::StateSet>            statesets_;
};

};

#endif