AbstractDataSourceTreeItem.h

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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 terralib/qt/widgets/datasource/explorer/AbstractDataSourceTreeItem.h

  \brief A class that represents an item from a DataSourceTreeModel.
*/

#ifndef __TERRALIB_QT_WIDGETS_INTERNAL_ABSTRACTDATASOURCETREEITEM_H
#define __TERRALIB_QT_WIDGETS_INTERNAL_ABSTRACTDATASOURCETREEITEM_H

// TerraLib
#include "../../Config.h"

//Qt
#include <QtCore/QModelIndex>
#include <QtCore/QObject>
#include <QtCore/QVariant>

// Forward declaration
class QMenu;
class QWidget;

namespace te
{
  namespace qt
  {
    namespace widgets
    {
      class TEQTWIDGETSEXPORT AbstractDataSourceTreeItem : public QObject
      {
        Q_OBJECT

        public:

          AbstractDataSourceTreeItem(QObject* parent = 0);

          virtual ~AbstractDataSourceTreeItem();

          // Returns the number of columns for the children of the item
          virtual int columnCount() const = 0;

          //Returns the data stored under the given role
          //http://doc.qt.nokia.com/4.7/qt.html#ItemDataRole-enum
          virtual QVariant data(int column, int role) const = 0;

          virtual QMenu* getMenu(QWidget* parent = 0) const = 0;

          virtual bool canFetchMore() const = 0;

          virtual void fetchMore() = 0;

          virtual Qt::ItemFlags flags() const = 0;

          virtual bool hasChildren() const = 0;

          virtual bool setData(const QVariant& value, int role = Qt::EditRole) = 0;
      }; 
    } // end namespace widgets
  }   // end namespace qt
}     // end namespace te

#endif  // __TERRALIB_QT_WIDGETS_INTERNAL_ABSTRACTDATASOURCETREEITEM_H