TouchScreenPinchGesture.h

// Copyright eeGeo Ltd (2012-2014), All Rights Reserved

#pragma once

#include "AppInterface.h"
#include "WindowsInput.h"

namespace Eegeo
{
    namespace Windows
    {
        namespace Input
        {
            class TouchScreenPinchGesture
            {
            private:
                IWindowsInputHandler* m_pHandler;
                bool m_pinching;
                float m_previousDistance;
                const float m_majorScreenDimension;
                bool UpdatePinching(bool pinching, const TouchScreenInputEvent& event, float& pinchScale, int numTouches, bool pointerUp, const std::vector<TouchScreenInputEvent>& touchEvents);
            public:
                TouchScreenPinchGesture(IWindowsInputHandler* pPinchHandler, const float screenWidth, const float screenHeight);

                void PointerDown(const TouchScreenInputEvent& event, const std::vector<TouchScreenInputEvent>& touchEvents);
                void PointerUp(const TouchScreenInputEvent& event, const std::vector<TouchScreenInputEvent>& touchEvents);
                void PointerMove(const TouchScreenInputEvent& event, const std::vector<TouchScreenInputEvent>& touchEvents);
            };
        }
    }
}