i_properties.hpp

Go to the documentation of this file.

// i_properties.hpp
/*
  neogfx C++ App/Game Engine
  Copyright (c) 2018, 2020 Leigh Johnston.  All Rights Reserved.
  
  This program is free software: you can redistribute it and / or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.
  
  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
  
  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
 
#pragma once
 
#include <neogfx/neogfx.hpp>
#include <neolib/core/map.hpp>
#include <neolib/core/i_string.hpp>
 
namespace neogfx
{
    class i_property;
 
    typedef neolib::i_map<neolib::i_string, i_property*> property_map;
 
    class i_properties
    {
        template <typename PropertyOwner>
        friend i_property& get_property(PropertyOwner&, std::string const&);
    public:
        virtual void register_property(i_property& aProperty) = 0;
        virtual const neogfx::property_map& property_map() const = 0;
    protected:
        neogfx::property_map& property_map()
        {
            return const_cast<neogfx::property_map&>(to_const(*this).property_map());
        }
        // helpers
    public:
        uint32_t count() const
        {
            return static_cast<uint32_t>(property_map().size());
        }
        std::string name(uint32_t aIndex) const
        {
            return std::next(property_map().begin(), aIndex)->first().to_std_string();
        }
        const i_property& property(uint32_t aIndex) const
        {
            return *std::next(property_map().begin(), aIndex)->second();
        }
        i_property& property(uint32_t aIndex)
        {
            return *std::next(property_map().begin(), aIndex)->second();
        }
    };
}