DtNullDrawer Class Reference

class DtNullDrawer: More...

Inheritance diagram for DtNullDrawer:

Public Member Functions
virtual	~DtNullDrawer ()
	DtNullDrawer ()
virtual bool	draw (QPainter &paint, const DtSymbol *const symbol) const
virtual QSize	calcBBox (const DtSymbol *const symbol) const
Public Member Functions inherited from DtSymbolDrawer
	DtSymbolDrawer ()
virtual	~DtSymbolDrawer ()
virtual bool	doDrawing (QPainter &paint, const DtSymbol *const symbol)
	Initializes any drawing information and then calls internal draw() method.
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 ()
Static Public Member Functions inherited from DtSymbolDrawer
static double	drawScalingFactor ()
	Because of potential size difference in printer and screen metrics, a scaling factor can be applied to any drawing that relies on screen coordinates (such as arrow or bitmap size).
static void	setDrawScalingFactor (double d)
static void	setHighlightColor (const QColor &color)
static const QColor &	highlightColor ()

Protected Member Functions
	DtNullDrawer (const DtNullDrawer &orig)
	Protected since not used. Prefer class to be a singleton.
DtNullDrawer &	operator= (const DtNullDrawer &orig)
	Protected since not used. Prefer class to be a singleton.
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.

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

Detailed Description

class DtNullDrawer:

Concrete implementation of DtSymbolDrawer which does nothing. Predominantly intended for testing symbology.

This class has no dependency on qt drawing routines. Thus if (when) we change from Qt to another drawing package, none of the symbol classes will change, just the symboldraw derived classes.

Constructor & Destructor Documentation

virtual DtNullDrawer::~DtNullDrawer ( )

virtual

DtNullDrawer::DtNullDrawer

(

)

DtNullDrawer::DtNullDrawer ( const DtNullDrawer &  orig )

protected

Protected since not used. Prefer class to be a singleton.

Member Function Documentation

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

virtual

Implements DtSymbolDrawer.

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

virtual

Implements DtSymbolDrawer.

static DtSymbolDrawer* DtNullDrawer::create ( )

static

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

protected

Protected since not used. Prefer class to be a singleton.

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

• include/symbolDrawerInterface/nullDrawer.h