XnVSlider2D.h

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/*******************************************************************************
*                                                                              *
*   PrimeSense NITE 1.3                                                        *
*   Copyright (C) 2010 PrimeSense Ltd.                                         *
*                                                                              *
*******************************************************************************/


#ifndef _XNV_SLIDER_2D_H_
#define _XNV_SLIDER_2D_H_

#include "XnVNiteDefs.h"
#include "XnVDirection.h"

class XnVPointBuffer;
class XnVFloatFloatSpecificEvent;
class XnVDirectionSpecificEvent;

class XNV_NITE_API XnVSlider2D
{
public:
    typedef void (XN_CALLBACK_TYPE *ValueChangeCB)(XnFloat fXValue, XnFloat fYValue, void* pUserCxt);
    typedef void (XN_CALLBACK_TYPE *OffAxisMovementCB)(XnVDirection eDir, void* pUserCxt);

    XnVSlider2D(const XnPoint3D& ptMin ,const XnPoint3D& ptMax);
    XnVSlider2D(const XnPoint3D& ptInitialPosition, XnFloat fSliderXLength, XnFloat fSliderYLength,
                XnFloat fInitialXValue, XnFloat fInitialYValue);

    ~XnVSlider2D();
    XnStatus Update(const XnPoint3D& pt, XnFloat fTime, XnBool bCheckOffAxis = true);

    XnCallbackHandle RegisterValueChange(void* cxt, ValueChangeCB CB); // Add CB to list
    XnCallbackHandle RegisterOffAxisMovement(void* cxt, OffAxisMovementCB CB); 
    void UnregisterValueChange(XnCallbackHandle hCB);
    void UnregisterOffAxisMovement(XnCallbackHandle hCB);

    XnPoint3D GetPosition() const {return m_ptCurrentPosition;}

    XnFloat  GetOffAxisDetectionVelocity() const;
    XnFloat  GetOffAxisDetectionAngle() const;
    XnUInt32 GetOffAxisDetectionTime() const;

    void SetOffAxisDetectionVelocity(XnFloat fVelocity);
    void SetOffAxisDetectionAngle(XnFloat fAngle);
    void SetOffAxisDetectionTime(XnUInt32 nTime);
protected:
    XnInt32 CheckForOffAxisMovement(const XnPoint3D& pt, XnFloat fTime);

    XnPoint3D m_ptMin, m_ptMax;
    XnFloat m_fSizeX, m_fSizeY;

    XnVPointBuffer* m_pPointBuffer;

    XnPoint3D m_ptCurrentPosition;

    // Event broadcast
    void ValueChange(XnFloat fXValue, XnFloat fYValue); // go over list and call all functions
    void OffAxisMovement(XnVDirection eDir);

    XnVFloatFloatSpecificEvent* m_pValueChangeCBs;
    XnVDirectionSpecificEvent* m_pOffAxisMovementCBs;

    static const XnFloat ms_fOffAxisDefaultMininumVelocity; // = 0.17 m/s
    static const XnFloat ms_fOffAxisDefaultDetectionAngle;      // = 60.0f
    static const XnUInt32 ms_nDefaultTimeForOffAxisDetection;   // = 350 ms

    XnFloat m_fOffAxisDetectionVelocity;
    XnFloat m_fOffAxisDetectionAngle;
    XnUInt32 m_nOffAxisDetectionTime;
};


#endif // _XNV_SLIDER_2D_H_