BackgroundStateContext.h

/******************************************************************************************************
 * (C) 2014 markummitchell@github.com. This file is part of Engauge Digitizer, which is released      *
 * under GNU General Public License version 2 (GPLv2) or (at your option) any later version. See file *
 * LICENSE or go to gnu.org/licenses for details. Distribution requires prior written permission.     *
 ******************************************************************************************************/
 
#ifndef BACKGROUND_STATE_CONTEXT_H
#define BACKGROUND_STATE_CONTEXT_H
 
#include "BackgroundImage.h"
#include "BackgroundStateAbstractBase.h"
#include <QVector>
 
class DocumentModelColorFilter;
class DocumentModelGridRemoval;
class GraphicsView;
class MainWindow;
class QGraphicsPixmapItem;
class Transformation;
 
class BackgroundStateContext
{
 public:
  BackgroundStateContext(MainWindow &mainWindow);
 
  void close();
 
  void fitInView (GraphicsView &view);
 
  QImage imageForCurveState () const;
 
  void requestStateTransition (BackgroundState backgroundState);
 
  void setBackgroundImage (BackgroundImage backgroundImage);
 
  void setCurveSelected (const Transformation &transformation,
                         const DocumentModelGridRemoval &modelGridRemoval,
                         const DocumentModelColorFilter &modelColorFilter,
                         const QString &curveSelected);
 
  void setPixmap (const Transformation &transformation,
                  const DocumentModelGridRemoval &modelGridRemoval,
                  const DocumentModelColorFilter &modelColorFilter,
                  const QPixmap &pixmapOriginal);
 
  void updateColorFilter (const Transformation &transformation,
                          const DocumentModelGridRemoval &modelGridRemoval,
                          const DocumentModelColorFilter &colorFilter);
 
 private:
  BackgroundStateContext();
 
  void completeRequestedStateTransitionIfExists ();
 
  const MainWindow &m_mainWindow;
 
  QVector<BackgroundStateAbstractBase*> m_states;
  BackgroundState m_currentState;
  BackgroundState m_requestedState; // Same as m_currentState until requestStateTransition is called
};
 
#endif // BACKGROUND_STATE_CONTEXT_H