XnVMultiItemHysteresis2D.h

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


#ifndef _XNV_MULTI_ITEM_HYSTERESIS_2D_H_
#define _XNV_MULTI_ITEM_HYSTERESIS_2D_H_

#include "XnVNiteDefs.h"

class XnVSigmoid;
class XnVPointBuffer;
class XnVIntIntSpecificEvent;
class XNV_NITE_API XnVMultiItemHysteresis2D
{
public:
    typedef void (XN_CALLBACK_TYPE *ItemSelectCB)(XnInt32 ItemXIndex, XnInt32 ItemYIndex, void* pUserCxt);

    XnVMultiItemHysteresis2D(XnInt32 nItemXCount, XnInt32 nItemYCount,
        XnFloat fBorderWidth = 0,
        XnFloat fHysteresisRatio = ms_fDefaultHysteresisRatio);

    ~XnVMultiItemHysteresis2D();

    XnStatus Update(XnFloat fXValue, XnFloat fYValue);
    void LostPoint();

    void ItemSelected(XnInt32 nItemXIndex, XnInt32 nItemYIndex);

    XnCallbackHandle RegisterItemSelect(void* cxt, ItemSelectCB pCB);
    void UnregisterItemSelect(XnCallbackHandle handle);

    XnUInt32 GetItemXCount() const;
    void SetItemXCount(XnUInt32 nItemXCount);
    XnUInt32 GetItemYCount() const;
    void SetItemYCount(XnUInt32 nItemYCount);

    void SetItemCount(XnUInt32 nItemXCount, XnUInt32 nItemYCount);

    XnFloat GetMinXValue() const;
    XnFloat GetMinYValue() const;
    XnFloat GetMaxYValue() const;
    XnFloat GetMaxXValue() const;

    XnFloat GetBorderWidth() const;
    XnStatus SetBorderWidth(XnFloat fWidth);

    XnFloat GetHysteresisRatio() const;

    void SetHysteresisRatio(XnFloat fRatio);

    static const XnFloat ms_fDefaultHysteresisRatio;    // = 0.5f
protected:
    void CalculateMinAndMax();

    XnBool IsValueInRange(XnFloat fXValue, XnFloat fYValue);

    XnUInt32 m_nItemXCount;
    XnUInt32 m_nItemYCount;

    XnFloat m_fMinXValue, m_fMaxXValue;
    XnFloat m_fMinYValue, m_fMaxYValue;

    XnInt32 m_nLastSelectedXIndex;
    XnInt32 m_nLastSelectedYIndex;

    XnFloat m_fBorderWidth;

    XnFloat m_fHysteresisRatio;

    XnVIntIntSpecificEvent* m_pItemSelectCBs;
}; // XnVMultiItem2DController

#endif // _XNV_MULTI_ITEM_HYSTERESIS_1D_H_