DeleteCommand.cpp

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/*  Copyright (C) 2008 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 DeleteCommand.cpp
   
  \brief 

  \ingroup layout
*/

// TerraLib
#include "DeleteCommand.h"
#include "../../../../core/pattern/mvc/ItemObserver.h"
#include "../../../../core/enum/EnumType.h"
#include "../../../../core/pattern/mvc/Observable.h"
#include "../../Scene.h"

// Qt
#include <QGraphicsScene>
#include <QGraphicsItem>

te::layout::DeleteCommand::DeleteCommand( QGraphicsScene* scene, QUndoCommand *parent /*= 0*/ ) :
  QUndoCommand(parent),
  m_scene(scene)
{
  m_items = m_scene->selectedItems();

  foreach( QGraphicsItem *item, m_items ) 
  {
    item->setSelected(false);
  }

  int size = m_items.size();

  setText(QObject::tr("Delete %1")
    .arg(createCommandString(size)));
}

te::layout::DeleteCommand::~DeleteCommand()
{
  
}

void te::layout::DeleteCommand::undo()
{
  Scene* scene = dynamic_cast<Scene*>(m_scene);

  if(!scene)
    return;

  foreach( QGraphicsItem *item, m_items ) 
  {
    item->setSelected(false);

    if(item->scene() != m_scene)
    {
      scene->insertItem(item);
      scene->removeItemStackWithoutScene(item);
    }
  }

  m_scene->update();
}

void te::layout::DeleteCommand::redo()
{
  Scene* scene = dynamic_cast<Scene*>(m_scene);

  if(!scene)
    return;

  foreach( QGraphicsItem *item, m_items ) 
  {
    if(item->scene() == m_scene)
    {
      m_scene->removeItem(item);
      scene->addItemStackWithoutScene(item);
    }
  }
}

QString te::layout::DeleteCommand::createCommandString( int totalItems )
{
  return QObject::tr("%1")
    .arg(totalItems);
}