view-locator.hpp

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/*
  VIEW-LOCATOR.hpp  -  access and allocation of UI component views

  Copyright (C)         Lumiera.org
    2017,               Hermann Vosseler <Ichthyostega@web.de>

  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 2 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, write to the Free Software
  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/


#ifndef STAGE_INTERACT_VIEW_LOCATOR_H
#define STAGE_INTERACT_VIEW_LOCATOR_H

#include "lib/depend-inject.hpp"
#include "stage/id-scheme.hpp"
#include "stage/interact/view-spec-dsl.hpp"
#include "stage/model/element-access.hpp"
#include "lib/idi/genfunc.hpp"
#include "lib/symbol.hpp"
#include "lib/nocopy.hpp"

#include <functional>
#include <string>
#include <memory>


namespace stage {
namespace ctrl{
  class PanelLocator;
}
namespace interact {
  
  using std::unique_ptr;
  using std::string;
  using lib::Symbol;
  
  class UILocationSolver;
  
  
  
  class ViewLocator
    : ::util::NonCopyable
    {
      using Service_LocationSolver = lib::DependInject<UILocationSolver>::ServiceInstance<>;
      
      lib::Depend<model::ElementAccess>  elementAccess;
      Service_LocationSolver locResolver_;
      
      
    public:
      ViewLocator ();
     ~ViewLocator();
      
      
      template<class V>
      V& get();
      
    private:
      /* === accessors to sibling global services  === */
      
    };
  
  
  
  template<class V>
  inline V&
  ViewLocator::get()
  {
    auto& viewSpec = idi::viewSpec<V>();
    Symbol viewID{lib::idi::typeSymbol<V>()};
    
    UICoord targetLocation = viewSpec.locate(viewID);
    UICoord realView       = viewSpec.alloc (targetLocation);
    
    return elementAccess().access<V> (realView);
  }
  
  
}}// namespace stage::interact
#endif /*STAGE_INTERACT_VIEW_LOCATOR_H*/