/*
 * LCD Image Converter. Converts images and fonts for embedded applications.
 * Copyright (C) 2010 riuson
 * mailto: riuson@gmail.com
 *
 * 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 3 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, see <http://www.gnu.org/licenses/
 */

#ifndef DATACONTAINER_H
#define DATACONTAINER_H

#include <QImage>
#include <QMap>
#include <QString>
#include <QStringList>
#include <QVariant>

namespace Data
{
namespace History
{
class HistoryKeeper;
}

namespace Containers
{
class DataContainer : public QObject
{
  Q_OBJECT
public:
  explicit DataContainer(QObject* parent = 0);
  virtual ~DataContainer();

  const QImage* image(const QString& imageKey) const;
  void setImage(const QString& imageKey, const QImage* image);

  QVariant commonInfo(const QString& infoKey) const;
  void setCommonInfo(const QString& infoKey, const QVariant& value);

  QVariant imageInfo(const QString& imageKey, const QString& infoKey) const;
  void setImageInfo(const QString& imageKey, const QString& infoKey, const QVariant& value);

  void clear();
  int count() const;
  QStringList keys() const;
  void removeImage(const QString& key);

  void reorderTo(const QStringList* keys);

  bool historyInitialized() const;
  void historyInit();
  void stateSave();
  void stateUndo();
  void stateRedo();
  bool canUndo() const;
  bool canRedo() const;

  bool changed() const;
  void setChanged(bool value);

private:
  static const QString DataChangedKey;
  static const QString CommonInfoKeyPrefix;
  static const QString ImageInfoKeyPrefix;

  QMap<QString, QImage*> mImageMap;
  QMap<QString, QVariant> mInfoMap;
  QStringList mKeys;
  QImage* mDefaultImage;
  Data::History::HistoryKeeper* mHistory;

signals:
  void dataChanged(bool historyStateMoved);
};

} // namespace Containers
} // namespace Data

#endif // DATACONTAINER_H