PickPoint.h

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/*  Copyright (C) 2003-2021 Free Electron Organization
    Any use of this software requires a license.  If a valid license
    was not distributed with this file, visit freeelectron.org. */

/** @file */

#ifndef __viewer_PickPoint_h__
#define __viewer_PickPoint_h__

namespace fe
{
namespace ext
{

/**************************************************************************//**
    @brief Interactive specification of a 3D point

    @ingroup viewer

    PickPoint expects WindowEvent, but it checks safely.

    The fourth element is non-zero when the point is valid.
*//***************************************************************************/
class FE_DL_EXPORT PickPoint: virtual public HandlerI,
        virtual public PointI
{
    public:
                        PickPoint(void);
virtual                 ~PickPoint(void)                                    {}

                        //* As HandlerI
virtual void            handle(Record& record);

                        //* As PointI
virtual SpatialVector&  point(const WindowEvent::Mask& mask);
virtual
const   SpatialVector&  point(const WindowEvent::Mask& mask) const;

virtual U32             flags(void) const               { return m_flags; }

virtual void            setView(sp<ViewI> spViewI)      { m_spViewI=spViewI; }
virtual void            drawFeedback(sp<DrawI> spDrawI) const;

    private:
        U32             itemIndex(const WindowEvent::Mask& mask) const;

        WindowEvent     m_event;
        sp<ViewI>       m_spViewI;
        I32             m_mouseState[2];
        U32             m_flags;
        Real            m_zValue;
        SpatialVector   m_feedback;
        SpatialVector   m_point[3][2];
        sp<DrawMode>    m_spHalo;
};

} /* namespace ext */
} /* namespace fe */

#endif /* __viewer_PickPoint_h__ */