MyGUI_TPoint.h

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/*
 * This source file is part of MyGUI. For the latest info, see http://mygui.info/
 * Distributed under the MIT License
 * (See accompanying file COPYING.MIT or copy at http://opensource.org/licenses/MIT)
 */

#ifndef __MYGUI_TPONT_H__
#define __MYGUI_TPONT_H__

#include "MyGUI_Prerequest.h"

namespace MyGUI
{
    namespace types
    {

        template<typename T>
        struct TPoint
        {
            T left;
            T top;

            TPoint() :
                left(0),
                top(0)
            {
            }

            TPoint(T const& _left, T const& _top) :
                left(_left),
                top(_top)
            {
            }

            TPoint(TPoint const& _obj) :
                left(_obj.left),
                top(_obj.top)
            {
            }

            TPoint& operator -= (TPoint const& _obj)
            {
                left -= _obj.left;
                top -= _obj.top;
                return *this;
            }

            TPoint& operator += (TPoint const& _obj)
            {
                left += _obj.left;
                top += _obj.top;
                return *this;
            }

            TPoint operator - (TPoint const& _obj) const
            {
                return TPoint(left - _obj.left, top - _obj.top);
            }

            TPoint operator + (TPoint const& _obj) const
            {
                return TPoint(left + _obj.left, top + _obj.top);
            }

            TPoint& operator = (TPoint const& _obj)
            {
                left = _obj.left;
                top = _obj.top;
                return *this;
            }

            template<typename U>
            TPoint& operator = (TPoint<U> const& _obj)
            {
                left = _obj.left;
                top = _obj.top;
                return *this;
            }

            bool operator == (TPoint const& _obj) const
            {
                return ((left == _obj.left) && (top == _obj.top));
            }

            bool operator != (TPoint const& _obj) const
            {
                return ! ((left == _obj.left) && (top == _obj.top));
            }

            void clear()
            {
                left = top = 0;
            }

            void set(T const& _left, T const& _top)
            {
                left = _left;
                top = _top;
            }

            void swap(TPoint& _value)
            {
                TPoint tmp = _value;
                _value = *this;
                *this = tmp;
            }

            bool empty() const
            {
                return ((left == 0) && (top == 0));
            }

            std::string print() const
            {
                std::ostringstream stream;
                stream << *this;
                return stream.str();
            }

            static TPoint<T> parse(const std::string& _value)
            {
                TPoint<T> result;
                std::istringstream stream(_value);
                stream >> result.left >> result.top;
                if (stream.fail())
                {
                    return TPoint<T>();
                }
                else
                {
                    int item = stream.get();
                    while (item != -1)
                    {
                        if (item != ' ' && item != '\t')
                            return TPoint<T>();
                        item = stream.get();
                    }
                }
                return result;
            }

            friend std::ostream& operator << (std::ostream& _stream, const TPoint<T>&  _value)
            {
                _stream << _value.left << " " << _value.top;
                return _stream;
            }

            friend std::istream& operator >> (std::istream& _stream, TPoint<T>&  _value)
            {
                _stream >> _value.left >> _value.top;
                if (_stream.fail())
                    _value.clear();
                return _stream;
            }
        };

    } // namespace types

} // namespace MyGUI

#endif // __MYGUI_TPONT_H__