TouchGesturePinch.h

#pragma once
#include "TouchGestureBase.h"

namespace ParaEngine
{
    class CTouchGesturePinch : public CTouchGestureBase
    {
    public:
        CTouchGesturePinch();
        virtual ~CTouchGesturePinch();

        enum PinchMode
        {
            PinchMode_Nil = 0,
            PinchMode_Open,
            PinchMode_Closed,
        };

        typedef std::function<bool(CTouchGesturePinch& pinch_gesture)> GestureRecognized_callback;
    public:
        int GetPinchThreshold() const { return m_nPinchThreshold; }
        void SetPinchThreshold(int val) { m_nPinchThreshold = val; }

        bool IsActive() const { return m_isActive; }
        PinchMode Pinch_mode() const { return m_pinch_mode; }

        void ResetLastDistance();

        int GetDeltaDistance();

        virtual bool InterpreteTouchGesture(const TouchEvent* touch, TouchSessions* touch_sessions = NULL);
    public:
        int m_nPinchThreshold;
        PinchMode m_pinch_mode;
        int m_lastDistance;
        int m_distance;
        bool m_isActive;
        
        GestureRecognized_callback handleGestureRecognized;
    };
}