TouchScreenPanGesture.h

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

#pragma once

#include "AppInterface.h"
#include "VectorMath.h"
#include "WindowsInput.h"
#include <vector>

namespace Eegeo
{
    namespace Windows
    {
        namespace Input
        {
            class TouchScreenPanGesture
            {
            private:
                IWindowsInputHandler* m_pHandler;
                bool m_panning;
                std::vector<Eegeo::v2> m_inputs;
                Eegeo::v2 m_panCenter;
                Eegeo::v2 m_panAnchor;
                const float m_majorScreenDimension;
                int m_maxDeviceTouchCount;

                Eegeo::v2 GetTouchExtents(const TouchScreenInputEvent& event, const std::vector<TouchScreenInputEvent>& touchInputEvents) const;
                void PopulatePanData(int numTouches, const v2& touchExtents, AppInterface::PanData& out_panData) const;

            public:
                TouchScreenPanGesture(IWindowsInputHandler* m_pHandler, const float screenWidth, const float screenHeight, const int maxDeviceTouchCount);

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