// $Id: fgl_scene.h $
// =================================================================
//  This code is distributed under the terms and conditions of the
//  CCP4 Program Suite Licence Agreement as 'Part 2' (Annex 2)
//  software. A copy of the CCP4 licence can be obtained by writing
//  to CCP4, Research Complex at Harwell, Rutherford Appleton
//  Laboratory, Didcot OX11 0FA, UK, or from
//  http://www.ccp4.ac.uk/ccp4license.php.
// =================================================================
//
//    29.08.13   <--  Date of Last Modification.
//                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//  ----------------------------------------------------------------
//
//  **** Module  :  fgl_scene <interface>
//       ~~~~~~~~~
//  **** Project :  QtLibs/FGL - plotting in Qt
//       ~~~~~~~~~
//  **** Classes :  fgl::Scene
//       ~~~~~~~~~
//
//  (C) E. Krissinel 2012-2013
//
// =================================================================
//

#ifndef FGL_SCENE_H
#define FGL_SCENE_H

#include <QGraphicsScene>

namespace fgl  {

  class Scene : public QGraphicsScene  {
  Q_OBJECT

    public:
      Scene ( QObject *parent=0 );
      ~Scene();

      void addMargins ( qreal leftMargin, qreal rightMargin,
                        qreal topMargin,  qreal bottomMargin );

      void paint ( QPainter *painter );

      qreal scalePenWidth ( qreal penWidth );
      qreal scaleV  ( qreal v );
      qreal scaleX  ( qreal x );
      qreal scaleY  ( qreal y );
      qreal x ( qreal scaledX );
      qreal y ( qreal scaledY );
      qreal scaleXi ( qreal x );
      qreal scaleYi ( qreal y );

    private:
      int   lineTypeID,textTypeID,rectTypeID,ellipseTypeID;
      qreal dx,dy,scale;

  };

}

#endif // FGL_SCENE_H