MyGUI_WidgetStyle.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_WIDGET_STYLE_H_
#define MYGUI_WIDGET_STYLE_H_
 
#include "MyGUI_Prerequest.h"
#include <string>
#include <cstring>
#include <iostream>
 
namespace MyGUI
{
 
    struct MYGUI_EXPORT WidgetStyle
    {
        enum Enum
        {
            Child, 
            Popup, 
            Overlapped, 
            MAX
        };
 
        WidgetStyle() :
            mValue(MAX)
        {
        }
 
        WidgetStyle(Enum _value) :
            mValue(_value)
        {
        }
 
        static WidgetStyle parse(std::string_view _value)
        {
            WidgetStyle type;
            int value = 0;
            while (true)
            {
                std::string_view name = type.getValueName(value);
                if (name.empty() || name == _value)
                    break;
                value++;
            }
            type.mValue = static_cast<Enum>(value);
            return type;
        }
 
        friend bool operator==(WidgetStyle const& a, WidgetStyle const& b)
        {
            return a.mValue == b.mValue;
        }
 
        friend bool operator!=(WidgetStyle const& a, WidgetStyle const& b)
        {
            return a.mValue != b.mValue;
        }
 
        friend std::ostream& operator<<(std::ostream& _stream, const WidgetStyle& _value)
        {
            _stream << _value.getValueName(_value.mValue);
            return _stream;
        }
 
        friend std::istream& operator>>(std::istream& _stream, WidgetStyle& _value)
        {
            std::string value;
            _stream >> value;
            _value = parse(value);
            return _stream;
        }
 
        std::string_view print() const
        {
            return getValueName(mValue);
        }
 
        int getValue() const
        {
            return mValue;
        }
 
    private:
        std::string_view getValueName(int _index) const
        {
            if (_index < 0 || _index >= MAX)
                return {};
            static const std::string_view values[MAX] = {"Child", "Popup", "Overlapped"};
            return values[_index];
        }
 
    private:
        Enum mValue;
    };
 
} // namespace MyGUI
 
#endif // MYGUI_WIDGET_STYLE_H_