skin_manager.hpp

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// skin_manager.hpp
/*
  neogfx C++ App/Game Engine
  Copyright (c) 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 <unordered_set>
#include <neogfx/gui/widget/i_skin_manager.hpp>
#include <neogfx/gui/widget/default_skin.hpp>
 
namespace neogfx
{
    class skin_manager : public i_skin_manager
    {
    public:
        define_declared_event(SkinRegistered, skin_registered, i_skin&)
        define_declared_event(SkinUnregistered, skin_unregistered, i_skin&)
    private:
        typedef std::unordered_set<i_skin*> skin_list;
    public:
        skin_manager();
    public:
        static skin_manager& instance();
    public:
        uint32_t skin_count() const override;
        const i_skin& skin(uint32_t aIndex) const override;
        i_skin& skin(uint32_t aIndex) override;
        void register_skin(i_skin& aSkin) override;
        void unregister_skin(i_skin& aSkin) override;
    public:
        bool skin_active() const override;
        const i_skin& active_skin() const override;
        i_skin& active_skin() override;
        void activate_skin(i_skin& aSkin) override;
    private:
        skin_list iSkins;
        i_skin* iActiveSkin;
        default_skin iDefaultSkin;
    };
}