OISMultiTouch.h

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/*
The zlib/libpng License

Copyright (c) 2005-2007 Phillip Castaneda (pjcast -- www.wreckedgames.com)

This software is provided 'as-is', without any express or implied warranty. In no event will
the authors be held liable for any damages arising from the use of this software.

Permission is granted to anyone to use this software for any purpose, including commercial
applications, and to alter it and redistribute it freely, subject to the following
restrictions:

    1. The origin of this software must not be misrepresented; you must not claim that
        you wrote the original software. If you use this software in a product,
        an acknowledgment in the product documentation would be appreciated but is
        not required.

    2. Altered source versions must be plainly marked as such, and must not be
        misrepresented as being the original software.

    3. This notice may not be removed or altered from any source distribution.
*/
#ifndef OIS_MultiTouch_H
#define OIS_MultiTouch_H
#include "OISObject.h"
#include "OISEvents.h"

#include <set>
#include <vector>

#define OIS_MAX_NUM_TOUCHES 4   // 4 finger touches are probably the highest we'll ever get

namespace OIS
{
    enum MultiTypeEventTypeID
    {
        MT_None = 0, MT_Pressed, MT_Released, MT_Moved, MT_Cancelled
    };

    class _OISExport MultiTouchState
    {
    public:
        MultiTouchState() : width(50), height(50), touchType(MT_None) {};

        mutable int width, height;

        Axis X;

        Axis Y;

        Axis Z;

        int touchType;

        inline bool touchIsType( MultiTypeEventTypeID touch ) const
        {
            return ((touchType & ( 1L << touch )) == 0) ? false : true;
        }
        
        void clear()
        {
            X.clear();
            Y.clear();
            Z.clear();
            touchType = MT_None;
        }
    };

    class _OISExport MultiTouchEvent : public EventArg
    {
    public:
        MultiTouchEvent( Object *obj, const MultiTouchState &ms ) : EventArg(obj), state(ms) {}
        virtual ~MultiTouchEvent() {}

        const MultiTouchState &state;
    };

    class _OISExport MultiTouchListener
    {
    public:
        virtual ~MultiTouchListener() {}
        virtual bool touchMoved( const MultiTouchEvent &arg ) = 0;
        virtual bool touchPressed( const MultiTouchEvent &arg ) = 0;
        virtual bool touchReleased( const MultiTouchEvent &arg ) = 0;
        virtual bool touchCancelled( const MultiTouchEvent &arg ) = 0;
    };

    class _OISExport MultiTouch : public Object
    {
    public:
        virtual ~MultiTouch() {}

        virtual void setEventCallback( MultiTouchListener *touchListener ) {mListener = touchListener;}

        MultiTouchListener* getEventCallback() {return mListener;}

        void clearStates(void) { mStates.clear(); }

        std::vector<MultiTouchState> getMultiTouchStates() const { return mStates; }
        
        const std::vector<MultiTouchState> getFirstNTouchStates(int n) {
            std::vector<MultiTouchState> states;
            for( unsigned int i = 0; i < mStates.size(); i++ ) {
                if(!(mStates[i].touchIsType(MT_None))) {
                    states.push_back(mStates[i]);
                }
            }
            return states;
        }

        const std::vector<MultiTouchState> getMultiTouchStatesOfType(MultiTypeEventTypeID type) {
            std::vector<MultiTouchState> states;
            for( unsigned int i = 0; i < mStates.size(); i++ ) {
                if(mStates[i].touchIsType(type)) {
                    states.push_back(mStates[i]);
                }
            }
            return states;
        }
        
    protected:
        MultiTouch(const std::string &vendor, bool buffered, int devID, InputManager* creator)
            : Object(vendor, OISMultiTouch, buffered, devID, creator), mListener(0) {}

        std::vector<MultiTouchState> mStates;

        MultiTouchListener *mListener;
    };
}
#endif