i_layout_item_cache.hpp

Go to the documentation of this file.

// i_layout_item_cache.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 <neogfx/gui/layout/i_geometry.hpp>
#include <neogfx/gui/layout/i_layout_item.hpp>
 
namespace neogfx
{
    enum class layout_item_disposition
    {
        Unknown,
        Weighted,
        Unweighted,
        TooSmall,
        FixedSize
    };
 
    struct layout_item_cache_subject_destroyed : std::logic_error { layout_item_cache_subject_destroyed() : std::logic_error{ "neogfx::layout_item_cache_subject_destroyed" } {} };
 
    class i_layout_item_cache : public i_layout_item
    {
        friend class layout;
    public:
        typedef i_layout_item_cache abstract_type;
    public:
        virtual i_layout_item& subject() const = 0;
        virtual bool subject_destroyed() const = 0;
    public:
        virtual layout_item_disposition& cached_disposition() const = 0;
    };
}