include/symbolDrawer/compositeDrawer.h

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/*******************************************************************************
** Copyright (c) 2003 MAK Technologies, Inc.
** All rights reserved.
*******************************************************************************/
/*******************************************************************************
** $RCSfile: compositeDrawer.h,v $ $Revision: 1.5 $ $State: Exp $
*******************************************************************************/


#ifndef DtCompositeDrawer_H_
#define DtCompositeDrawer_H_

#include "symbolDrawer/baseSymbolDrawer.h"

class DtSymbol;

#include <QtGui/QPixmap>
#include "ngutil/dtqlist.h"

#include "symbolDrawer/symbolDrawerDefines.h"

class DT_DLL_symbolDrawer DtCompositeDrawer : public DtBaseSymbolDrawer
{
public:

   DtCompositeDrawer();
   virtual ~DtCompositeDrawer();
   
   virtual bool         draw( QPainter& paint,
                              const DtSymbol * const symbol ) const;

   virtual QSize calcBBox( const DtSymbol * const symbol ) const;
   
   virtual void addDrawer(DtSymbolDrawer* drawer);
   virtual void removeDrawer(DtSymbolDrawer* drawer);
   virtual DtPtrQList<DtSymbolDrawer*>* drawers();

   void destroyDrawer(DtSymbolDrawer*, bool add = true);

protected:
   virtual bool forceUpdate(const DtSymbol* const symbol) const;

   virtual bool endTransparentDraw(QPainter& paint,
                     const DtSymbol * const symbol) const;

private:
   DtCompositeDrawer(const DtCompositeDrawer& orig);
   DtCompositeDrawer& operator=(const DtCompositeDrawer& orig);

protected:
   DtPtrQList<DtSymbolDrawer*> mySymbolDrawers;
   DtPtrQList<DtSymbolDrawer*> myDrawersToDestroy;
};

inline void DtCompositeDrawer::destroyDrawer(DtSymbolDrawer* d, bool add)
{
   if (add)
   {
      if (myDrawersToDestroy.findRef(d) == -1)
      {
         myDrawersToDestroy.append(d);
      }
   }
   else
   {
      myDrawersToDestroy.remove(d);
   }
}

#endif