MyGUI_FlowDirection.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_FLOW_DIRECTION_H_
#define MYGUI_FLOW_DIRECTION_H_
 
#include "MyGUI_Prerequest.h"
#include <string>
#include <string.h>
#include <iostream>
 
namespace MyGUI
{
 
    struct MYGUI_EXPORT FlowDirection
    {
        enum Enum
        {
            LeftToRight,
            RightToLeft,
            TopToBottom,
            BottomToTop,
            MAX
        };
 
        FlowDirection(Enum _value = LeftToRight) :
            mValue(_value)
        {
        }
 
        static FlowDirection parse(const std::string& _value)
        {
            FlowDirection type;
            int value = 0;
            while (true)
            {
                const char* name = type.getValueName(value);
                if (strcmp(name, "") == 0 || name == _value) break;
                value++;
            }
            type.mValue = (Enum)value;
            return type;
        }
 
        bool isHorizontal() const
        {
            return mValue == LeftToRight || mValue == RightToLeft;
        }
 
        bool isVertical() const
        {
            return !isHorizontal();
        }
 
        friend bool operator == (FlowDirection const& a, FlowDirection const& b)
        {
            return a.mValue == b.mValue;
        }
 
        friend bool operator != (FlowDirection const& a, FlowDirection const& b)
        {
            return a.mValue != b.mValue;
        }
 
        friend std::ostream& operator << ( std::ostream& _stream, const FlowDirection&  _value )
        {
            _stream << _value.getValueName(_value.mValue);
            return _stream;
        }
 
        friend std::istream& operator >> ( std::istream& _stream, FlowDirection&  _value )
        {
            std::string value;
            _stream >> value;
            _value = parse(value);
            return _stream;
        }
 
        std::string print() const
        {
            return getValueName(mValue);
        }
 
        int getValue() const
        {
            return mValue;
        }
 
    private:
        const char* getValueName(int _index) const
        {
            static const char* values[MAX + 1] = { "LeftToRight", "RightToLeft", "TopToBottom", "BottomToTop", "" };
            return values[(_index < MAX && _index >= 0) ? _index : MAX];
        }
 
    private:
        Enum mValue;
    };
 
} // namespace MyGUI
 
#endif // MYGUI_FLOW_DIRECTION_H_