Translate2DDragger

/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 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.
*/
//osgManipulator - Copyright (C) 2007 Fugro-Jason B.V.

#ifndef OSGMANIPULATOR_TRANSLATE2DDRAGGER
#define OSGMANIPULATOR_TRANSLATE2DDRAGGER 1

#include <osgManipulator/Dragger>
#include <osgManipulator/Projector>

#include <osg/PolygonOffset>

namespace osgManipulator {

/**
 * Dragger for performing 2D translation.
 */
class OSGMANIPULATOR_EXPORT Translate2DDragger : public Dragger
{
    public:

        Translate2DDragger();

        Translate2DDragger(const osg::Plane& plane);

        META_OSGMANIPULATOR_Object(osgManipulator,Translate2DDragger)

        /** Handle pick events on dragger and generate TranslateInLine commands. */
        virtual bool handle(const PointerInfo& pi, const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& us);

        /** Setup default geometry for dragger. */
        void setupDefaultGeometry();

        /** Set/Get color for dragger. */
        inline void setColor(const osg::Vec4& color) { _color = color; setMaterialColor(_color,*this); }
        inline const osg::Vec4& getColor() const { return _color; }

        /** Set/Get pick color for dragger. Pick color is color of the dragger when picked.
            It gives a visual feedback to show that the dragger has been picked. */
        inline void setPickColor(const osg::Vec4& color) { _pickColor = color; }
        inline const osg::Vec4& getPickColor() const { return _pickColor; }

    protected:

        virtual ~Translate2DDragger();

        osg::ref_ptr< PlaneProjector >  _projector;
        osg::Vec3d                      _startProjectedPoint;

        osg::Vec4                       _color;
        osg::Vec4                       _pickColor;
        osg::ref_ptr<osg::PolygonOffset> _polygonOffset;
};


}

#endif