VisitorUtils.cpp

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/*  Copyright (C) 2001-2014 National Institute For Space Research (INPE) - Brazil.

    This file is part of the TerraLib - a Framework for building GIS enabled applications.

    TerraLib is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation, either version 3 of the License,
    or (at your option) any later version.

    TerraLib 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 Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with TerraLib. See COPYING. If not, write to
    TerraLib Team at <terralib-team@terralib.org>.
 */

/*!
  \file VisitorUtils.cpp
   
  \brief 

  \ingroup layout
*/

// TerraLib
#include "VisitorUtils.h"
#include "AbstractType.h"
#include "LegendModel.h"
#include "ItemObserver.h"
#include "MapModel.h"
#include "ScaleModel.h"

// STL
#include <stddef.h>  // defines NULL

// Boost
#include "boost\foreach.hpp"

TELAYOUTEXPORT bool te::layout::changeMapVisitable( QList<QGraphicsItem*> graphicsItems, te::layout::Visitable* visitable )
{
  te::layout::MapModel* mpModel = dynamic_cast<te::layout::MapModel*>(visitable);

  if(!mpModel)
    return false;

  te::layout::LegendModel* legModel = 0;
  te::layout::ScaleModel*  scaleModel = 0;

  foreach( QGraphicsItem *it, graphicsItems) 
  {
    if(!it)
      continue;

    te::layout::ItemObserver* lIt = dynamic_cast<te::layout::ItemObserver*>(it);
    if(!lIt)
      continue;

    te::layout::ItemModelObservable* model = dynamic_cast<te::layout::ItemModelObservable*>(lIt->getModel());
    if(!model)
      continue;

    switch(model->getType())
    {
    case TPLegendItem:
      legModel = dynamic_cast<te::layout::LegendModel*>(model);
      if(legModel)
        mpModel->acceptVisitor(legModel);
      break;
    case TPScaleItem:
      scaleModel = dynamic_cast<te::layout::ScaleModel*>(model);
      if(scaleModel)
        mpModel->acceptVisitor(scaleModel);
      break;
    default:
      continue;
    }
  }

  return true;
}