DtTTSDrawer Class Reference

class DtTTSDrawer: More...

Inheritance diagram for DtTTSDrawer:

Public Member Functions
	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
	Calculate the drawn size of this symbol.
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
	Compare the desired family to the one actually loaded.
virtual QPoint	calcOrigin (const DtTTSSymbol *s, bool calcBitmapOrigin=false) const
	Calculates the upper left corner of the text and sets the appearance font for drawing, so, if you call this routine, you do not need to call setAppearance.
virtual void	paintFont (QPainter &painter, int left, int base, const DtTTSSymbol &symbol, const QColor &) const
	Paint the font symbol on the device, so that its left, bottom corner is at the specified location.
virtual void	paintFont (QPainter &painter, QRect &rect, const DtTTSSymbol &t, const QColor &, int flags=0) const
virtual void	setCenter (bool b)
	Sets whether or not to center the text. By default left jusitfies.
Public Member Functions inherited from DtBaseSymbolDrawer
	DtBaseSymbolDrawer ()
virtual	~DtBaseSymbolDrawer ()
virtual bool	doDrawing (QPainter &paint, const DtSymbol *const symbol)
	! Initializes any drawing information and then calls internal draw() method
Public Member Functions inherited from DtSymbolDrawer
	DtSymbolDrawer ()
virtual	~DtSymbolDrawer ()
virtual QRect	calcBRect (const DtSymbol *const symbol) const
virtual bool	forceUpdate (const DtSymbol *const symbol) const
	Override if your class wants to force a redraw of this item regardless of performance enhancement state.
virtual bool	endTransparentDraw (QPainter &paint, const DtSymbol *const symbol) const
	Called after transparent draw is finished if symbol wants to draw transparently.
virtual void	processHiddenSymbolAction (QPainter &paint, const DtSymbol *const symbol)
	Routine to perform even when symbol is hidden.

Static Public Member Functions
static DtSymbolDrawer *	create ()

Protected Member Functions
virtual void	setAppearance (const DtTTSSymbol &s) const
	Use symbol to set attributes.
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 void	createFontKey ()
virtual QHash< QString, QPixmap >::const_iterator	insertPix (const DtTTSSymbol &symbol, const QPixmap *pix) const
	Cache management functions.
virtual const QPixmap *	lookupPix (const DtTTSSymbol &symbol) const
	Cache management functions.
virtual const QPixmap *	createPix (const DtTTSSymbol *pSymbol) const
	Cache management functions.
Protected Member Functions inherited from DtBaseSymbolDrawer
virtual QRgb	opaqueColor () const
	! Returns color that will be ignored during transparent draw
Protected Member Functions inherited from DtSymbolDrawer
	DtSymbolDrawer (const DtSymbolDrawer &orig)
	Protected so not used. Conceptually class is a singleton.
DtSymbolDrawer &	operator= (const DtSymbolDrawer &orig)
	Protected so not used. Conceptually class is a singleton.

Protected Attributes
QFont	myFont
	Mutable since we are just saving this information for performance reasons.
QFont	myDefaultFont
QFontMetrics	myFontMetrics
bool	myCenter
QHash< QString, QPixmap >	myCache
	mutable since we are just saving this information for performance reasons.
QString	myFontKey

Private Member Functions
	DtTTSDrawer (const DtTTSDrawer &orig)
DtTTSDrawer &	operator= (const DtTTSDrawer &orig)

Additional Inherited Members
Static Protected Attributes inherited from DtSymbolDrawer
static double	gDrawScalingFactor
static QColor	theHighlightColor

Detailed Description

class DtTTSDrawer:

Concrete class which draws scaled strings using a true type font. Subclassed from BMP Drawer to support caching of font drawing to bitmaps (QPixmap). This is a faster way to draw under windows than font drawing (as of Qt 4.4.1)

Constructor & Destructor Documentation

DtTTSDrawer::DtTTSDrawer

(

)

DtTTSDrawer::DtTTSDrawer	(	const QString &	family,
		int	pointSize = 24
	)

virtual DtTTSDrawer::~DtTTSDrawer ( )

virtual

DtTTSDrawer::DtTTSDrawer ( const DtTTSDrawer &  orig )

private

Member Function Documentation

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

virtual

Implements DtSymbolDrawer.

virtual QSize DtTTSDrawer::calcBBox ( const DtSymbol *const  symbol ) const

virtual

Calculate the drawn size of this symbol.

The symbol must be of a type this drawer can recognize.

Implements DtSymbolDrawer.

Reimplemented in DtTTFUnitSymbolDrawer.

virtual void DtTTSDrawer::setFont ( const QString &  family, unsigned  pointSize  )

virtual

virtual void DtTTSDrawer::setFont ( const QFont &  font )

virtual

const QFont& DtTTSDrawer::font

(

)

const

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

virtual

Compare the desired family to the one actually loaded.

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

virtual

Calculates the upper left corner of the text and sets the appearance font for drawing, so, if you call this routine, you do not need to call setAppearance.

Reimplemented in DtMMMDrawer, and DtTTFUnitSymbolDrawer.

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

virtual

Paint the font symbol on the device, so that its left, bottom corner is at the specified location.

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

virtual

virtual void DtTTSDrawer::setCenter ( bool  b )

virtual

Sets whether or not to center the text. By default left jusitfies.

static DtSymbolDrawer* DtTTSDrawer::create ( )

static

Reimplemented in DtTTFUnitSymbolDrawer, and DtMMMDrawer.

virtual void DtTTSDrawer::setAppearance ( const DtTTSSymbol &  s ) const

protectedvirtual

Use symbol to set attributes.

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

protectedvirtual

Reimplemented in DtMMMDrawer.

virtual bool DtTTSDrawer::drawFont ( QPainter &  painter, const QPoint &  origin, const DtTTSSymbol &  t  ) const

protectedvirtual

Reimplemented in DtMMMDrawer.

virtual QString DtTTSDrawer::calcKey ( const DtTTSSymbol &  symbol ) const

protectedvirtual

virtual QHash<QString, QPixmap>::const_iterator DtTTSDrawer::insertPix ( const DtTTSSymbol &  symbol, const QPixmap *  pix  ) const

protectedvirtual

Cache management functions.

virtual const QPixmap* DtTTSDrawer::lookupPix ( const DtTTSSymbol &  symbol ) const

protectedvirtual

Cache management functions.

virtual const QPixmap* DtTTSDrawer::createPix ( const DtTTSSymbol *  pSymbol ) const

protectedvirtual

Cache management functions.

Reimplemented in DtMMMDrawer.

virtual void DtTTSDrawer::createFontKey ( )

protectedvirtual

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

private

Member Data Documentation

QFont DtTTSDrawer::myFont

mutableprotected

Mutable since we are just saving this information for performance reasons.

We reset it for every symbol.

QFont DtTTSDrawer::myDefaultFont

mutableprotected

QFontMetrics DtTTSDrawer::myFontMetrics

mutableprotected

bool DtTTSDrawer::myCenter

protected

QHash<QString, QPixmap> DtTTSDrawer::myCache

mutableprotected

mutable since we are just saving this information for performance reasons.

QString DtTTSDrawer::myFontKey

protected

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The documentation for this class was generated from the following file:

• include/symbolDrawer/ttsDrawer.h