View_Composite.h

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/*
 * Copyright 2000 Murray Cumming
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifndef BAKERY_VIEW_COMPOSITE_H
#define BAKERY_VIEW_COMPOSITE_H

#include "bakery/View/View.h"
#include <vector>
#include <algorithm> //For std::find

namespace Bakery
{

template< class T_Document >
class View_Composite : public View<T_Document>
{
public: 
  View_Composite()
  {
  }

  virtual ~View_Composite()
  {
  }

  typedef View<T_Document> type_view;

  virtual void add_view(type_view* pView)
  {
    //Ensure that the view has the same document:
    //This should be unnecessary.
    if(pView)
    {
      pView->set_document(View<T_Document>::get_document());

      //Add it to the list of child views:
      m_vecViews.push_back(pView);
    }
  }

  virtual void remove_view(type_view* pView)
  {
    typename type_vecViews::iterator iter = std::find(m_vecViews.begin(), m_vecViews.end(), pView);
    if(iter != m_vecViews.end())
      m_vecViews.erase(iter);
  }

  virtual void set_document(T_Document* pDocument)
  {
    //Call base class:
    View<T_Document>::set_document(pDocument);

    //Change the document in the child views.
    for(typename type_vecViews::iterator iter = m_vecViews.begin(); iter != m_vecViews.end(); iter++)
    {
      type_view* pView = *iter;
      if(pView)
        pView->set_document(pDocument);
    }
  }

  virtual void load_from_document()
  {
    //Delegate to the child views:
    for(typename type_vecViews::iterator iter = m_vecViews.begin(); iter != m_vecViews.end(); iter++)
    {
      type_view* pView = *iter;
      if(pView)
        pView->load_from_document();
    }
  }

  virtual void save_to_document()
  {
    //Delegate to the child views:
    for(typename type_vecViews::iterator iter = m_vecViews.begin(); iter != m_vecViews.end(); iter++)
    {
      type_view* pView = *iter;
      if(pView)
        pView->save_to_document();
    }
  }

protected:
  typedef std::vector<type_view*> type_vecViews;
  type_vecViews m_vecViews;    
};

} //namespace

#endif

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