MyGUI_TRect.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_TRECT_H__
#define __MYGUI_TRECT_H__

#include "MyGUI_Prerequest.h"

namespace MyGUI
{
    namespace types
    {

        template<typename T>
        struct TRect
        {
            T left;
            T top;
            T right;
            T bottom;

            TRect() :
                left(0),
                top(0),
                right(0),
                bottom(0)
            {
            }

            TRect(T const& _left, T const& _top, T const& _right, T const& _bottom) :
                left(_left),
                top(_top),
                right(_right),
                bottom(_bottom)
            {
            }

            TRect(TRect const& _obj) :
                left(_obj.left),
                top(_obj.top),
                right(_obj.right),
                bottom(_obj.bottom)
            {
            }

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

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

            TRect operator - (TRect const& _obj) const
            {
                return TRect(left - _obj.left, top - _obj.top, right - _obj.right, bottom - _obj.bottom);
            }

            TRect operator + (TRect const& _obj) const
            {
                return TRect(left + _obj.left, top + _obj.top, right + _obj.right, bottom + _obj.bottom);
            }

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

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

            bool operator == (TRect const& _obj) const
            {
                return ((left == _obj.left) && (top == _obj.top) && (right == _obj.right) && (bottom == _obj.bottom));
            }

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

            T width() const
            {
                return right - left;
            }

            T height() const
            {
                return bottom - top;
            }

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

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

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

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

            bool inside(const TRect<T>&  _value) const
            {
                return ((_value.left >= left) && (_value.right <= right) && (_value.top >= top) && (_value.bottom <= bottom));
            }

            bool intersect(const TRect<T>&  _value) const
            {
                return ((_value.left <= right) && (_value.right >= left) && (_value.top <= bottom) && (_value.bottom >= top));
            }

            bool inside(const TPoint<T>&  _value) const
            {
                return ((_value.left >= left) && (_value.left <= right) && (_value.top >= top) && (_value.top <= bottom));
            }

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

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

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

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

    } // namespace types

} // namespace MyGUI

#endif // __MYGUI_TRECT_H__