i_anchorable.hpp

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// i_anchorable.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/string.hpp>
#include <neogfx/gui/layout/i_anchor.hpp>
 
namespace neogfx
{
    class i_object;
 
    struct anchor_not_found : std::runtime_error { anchor_not_found(std::string const& aAnchor) : std::runtime_error{ "neoGFX: Anchor '" + aAnchor + "' not found." } {} };
 
    class i_anchorable
    {
        // types
    public:
        typedef i_anchorable abstract_type;
        typedef neolib::i_map<i_string, i_anchor*> anchor_map_type;
        // meta
    public:
        virtual i_object& as_object() = 0;
        // operations
    public:
        virtual i_anchor& anchor_to(i_anchorable& aRhs, const i_string& aLhsAnchor, anchor_constraint_function aLhsFunction, const i_string& aRhsAnchor, anchor_constraint_function aRhsFunction) = 0;
        // state
    public:
        virtual const anchor_map_type& anchors() const = 0;
        virtual anchor_map_type& anchors() = 0;
        // helpers
    public:
        i_anchor& anchor_to(i_anchorable& aRhs, std::string const& aLhsAnchor, anchor_constraint_function aLhsFunction, std::string const& aRhsAnchor, anchor_constraint_function aRhsFunction)
        {
            return anchor_to(aRhs, string{ aLhsAnchor }, aLhsFunction, string{ aRhsAnchor }, aRhsFunction);
        }
    };
 
    inline void layout_as_same_size(i_anchorable& aFirst, i_anchorable& aSecond)
    {
        aFirst.anchor_to(aSecond, string{ "MinimumSize" }, anchor_constraint_function::Max, string{ "MinimumSize" }, anchor_constraint_function::Max);
    }
 
    inline void layout_as_same_width(i_anchorable& aFirst, i_anchorable& aSecond)
    {
        aFirst.anchor_to(aSecond, string{ "MinimumSize" }, anchor_constraint_function::MaxX, string{ "MinimumSize" }, anchor_constraint_function::MaxX);
    }
 
    inline void layout_as_same_height(i_anchorable& aFirst, i_anchorable& aSecond)
    {
        aFirst.anchor_to(aSecond, string{ "MinimumSize" }, anchor_constraint_function::MaxY, string{ "MinimumSize" }, anchor_constraint_function::MaxY);
    }
 
    inline void layout_as_same_size_min_max(i_anchorable& aFirst, i_anchorable& aSecond)
    {
        aFirst.anchor_to(aSecond, string{ "MinimumSize" }, anchor_constraint_function::Min, string{ "MinimumSize" }, anchor_constraint_function::Max);
    }
 
    inline void layout_as_same_width_min_max(i_anchorable& aFirst, i_anchorable& aSecond)
    {
        aFirst.anchor_to(aSecond, string{ "MinimumSize" }, anchor_constraint_function::MinX, string{ "MinimumSize" }, anchor_constraint_function::MaxX);
    }
 
    inline void layout_as_same_height_min_max(i_anchorable& aFirst, i_anchorable& aSecond)
    {
        aFirst.anchor_to(aSecond, string{ "MinimumSize" }, anchor_constraint_function::MinY, string{ "MinimumSize" }, anchor_constraint_function::MaxY);
    }
}