include/tmqt/tmBackground.h

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/*******************************************************************************
** Copyright (c) 2002 MaK Technologies, Inc.
** All rights reserved.
*******************************************************************************/
/*******************************************************************************
** $RCSfile: tmBackground.h,v $ $Revision: 1.5 $ $State: Exp $
*******************************************************************************/


#ifndef TMBACKGROUND_H_
#define TMBACKGROUND_H_

#include <QtCore/QObject>
#include <QtGui/QPixmap>

class DtTMArea;
class DtTMViewportExtents;

#include "tmqt/tmqtDefines.h"
class DT_DLL_tmqt DtTMBackground : public QObject
{

public:

   DtTMBackground();

   DtTMBackground(const DtTMBackground& orig);

   virtual ~DtTMBackground();

   DtTMBackground& operator=(const DtTMBackground& rhs);

   virtual bool init(DtTMArea* area);
      
   virtual void draw(QPainter* painter = NULL) = 0;
   virtual void clear() = 0;

   virtual const DtTMViewportExtents* viewportExtents() const;
   virtual void setViewportExtents(DtTMViewportExtents* v);

   virtual QPixmap* pixmap() const;

   virtual void setPixmap(QPixmap*);

   void setNeedsRedraw(bool);
   bool needsRedraw() const;

protected:
   QPixmap* myPixmap;
   
   DtTMViewportExtents* myViewportExtents;
   DtTMArea*            myArea;

   bool                 myNeedsRedraw;
};

inline void DtTMBackground::setNeedsRedraw(bool b)
{
   myNeedsRedraw = b;
}

inline bool DtTMBackground::needsRedraw() const
{
   return myNeedsRedraw;
}

#endif //TMBACKGROUND_H_