ttsDrawer.h

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/*********************************************************************
** Copyright (c) 2001 MAK Technologies, Inc.
** All rights reserved.
*********************************************************************/
/*********************************************************************
** $RCSfile: ttsDrawer.h,v $ $Revision: 1.28 $ $State: Exp $
*********************************************************************/


#ifndef DtTTSDrawer_H_
#define DtTTSDrawer_H_

#include "symbolDrawer/symbolDrawerDefines.h"
#include "symbolDrawer/baseSymbolDrawer.h"

#include <QtCore/QCache>
#include <QtCore/QSize>

#include <QtGui/QPixmap>
#include <QtGui/QPainter>
#include <QtGui/QBrush>
#include <QtGui/QFont>
#include <QtGui/QFontMetrics>

class QString;
class DtSymbol;
class DtTTSSymbol;
class DtCenterPoint;


class DT_DLL_symbolDrawer DtTTSDrawer : public DtBaseSymbolDrawer
{
public:
   DtTTSDrawer();
   DtTTSDrawer(const QString & family, int pointSize = 24 );
   virtual ~DtTTSDrawer();

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

   virtual QSize        calcBBox( const DtSymbol * const symbol ) const;

   virtual void         setFont( const QString & family, unsigned pointSize );
   virtual void         setFont( const QFont & font );
   const QFont &        font() const;

   virtual bool         compareFamily( const QString & desiredFamily,
                              const QFont& font ) const;

   virtual QPoint calcOrigin(const DtTTSSymbol* s, bool calcBitmapOrigin = false) const;

   virtual void         paintFont(QPainter& painter, 
                                 int left, int base, 
                                 const DtTTSSymbol & symbol, const QColor& ) const;

   virtual void         paintFont(QPainter& painter, QRect& rect, const DtTTSSymbol& t,
                                 const QColor&, int flags = 0) const;

   virtual void setCenter(bool b);

   static DtSymbolDrawer* create();

protected:
   virtual void         setAppearance( const DtTTSSymbol & s ) const;

   virtual bool         drawSymbolAsBitmap(QPainter& painter, const QPoint& origin, const DtTTSSymbol& t) const;

   virtual bool         drawFont(QPainter& painter, const QPoint& origin, const DtTTSSymbol& t) const;
   virtual QString            calcKey( const DtTTSSymbol & symbol ) const;


   virtual QHash<QString, QPixmap>::const_iterator insertPix( const DtTTSSymbol & symbol,
                                          const QPixmap * pix ) const;
   virtual const QPixmap *    lookupPix( const DtTTSSymbol & symbol ) const;
   virtual const QPixmap*     createPix(const DtTTSSymbol *pSymbol) const;

   virtual void createFontKey();

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

protected:
   mutable QFont                 myFont;
   mutable QFont                 myDefaultFont;
   mutable QFontMetrics          myFontMetrics;
   bool myCenter;
   
protected:
   mutable QHash<QString, QPixmap>     myCache; 
   QString                             myFontKey;
};

#endif