DtSymbolDrawer Class Reference

class DtSymbolDrawerInterface: More...

Inheritance diagram for DtSymbolDrawer:

List of all members.

Public Member Functions
	DtSymbolDrawer ()
virtual	~DtSymbolDrawer ()
virtual bool	doDrawing (QPainter &paint, const DtSymbol *const symbol)
	Initializes any drawing information and then calls internal draw() method.
virtual QSize	calcBBox (const DtSymbol *const symbol) const =0
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.
virtual bool	draw (QPainter &paint, const DtSymbol *const symbol) const =0
Static Public Member Functions
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
	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.
Static Protected Attributes
static double	gDrawScalingFactor
static QColor	theHighlightColor

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Detailed Description

class DtSymbolDrawerInterface:

Abstract base class which provides the bridge interface between the symbol and symbolDraw hierarchies.

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.

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Constructor & Destructor Documentation

DtSymbolDrawer::DtSymbolDrawer

(

)

virtual DtSymbolDrawer::~DtSymbolDrawer

(

)

[virtual]

DtSymbolDrawer::DtSymbolDrawer

(

const DtSymbolDrawer &

orig

)

[protected]

Protected so not used. Conceptually class is a singleton.

---

Member Function Documentation

virtual bool DtSymbolDrawer::doDrawing	(	QPainter &	paint,
		const DtSymbol *const	symbol
	)		[virtual]

Initializes any drawing information and then calls internal draw() method.

Reimplemented in DtBaseSymbolDrawer.

virtual QSize DtSymbolDrawer::calcBBox

(

const DtSymbol *const

symbol

)

const [pure virtual]

Implemented in DtLineDrawer, DtVertexDrawer, DtTTSDrawer, DtMultiLineDrawer, DtCompositeDrawer, DtBMPDrawer, DtCircleDrawer, DtPolygonDrawer, DtTTFUnitSymbolDrawer, and DtNullDrawer.

virtual QRect DtSymbolDrawer::calcBRect

(

const DtSymbol *const

symbol

)

const [virtual]

Reimplemented in DtTTFUnitSymbolDrawer.

virtual bool DtSymbolDrawer::forceUpdate

(

const DtSymbol *const

symbol

)

const [virtual]

Override if your class wants to force a redraw of this item regardless of performance enhancement state.

By default this returns false

Reimplemented in DtCompositeDrawer.

virtual bool DtSymbolDrawer::endTransparentDraw	(	QPainter &	paint,
		const DtSymbol *const	symbol
	)		const [virtual]

Called after transparent draw is finished if symbol wants to draw transparently.

Noop for this drawer

Reimplemented in DtVertexDrawer, and DtCompositeDrawer.

virtual void DtSymbolDrawer::processHiddenSymbolAction	(	QPainter &	paint,
		const DtSymbol *const	symbol
	)		[virtual]

Routine to perform even when symbol is hidden.

Called only when symbol is hidden. Default implementation does nothing

static double DtSymbolDrawer::drawScalingFactor

(

)

[static]

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).

If this scaling factor is not referenced in drawing code, then, when items are printed to a printer, the layout may not be correct

static void DtSymbolDrawer::setDrawScalingFactor

(

double

d

)

[static]

virtual bool DtSymbolDrawer::draw	(	QPainter &	paint,
		const DtSymbol *const	symbol
	)		const [pure virtual]

Implemented in DtTTSDrawer, DtVertexDrawer, DtLineDrawer, DtMultiLineDrawer, DtCompositeDrawer, DtNullDrawer, DtBMPDrawer, DtCircleDrawer, DtPolygonDrawer, and DtResizableCircleDrawer.

static void DtSymbolDrawer::setHighlightColor

(

const QColor &

color

)

[static]

static const QColor& DtSymbolDrawer::highlightColor

(

)

[static]

DtSymbolDrawer& DtSymbolDrawer::operator=

(

const DtSymbolDrawer &

orig

)

[protected]

Protected so not used. Conceptually class is a singleton.

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Member Data Documentation

double DtSymbolDrawer::gDrawScalingFactor [static, protected]

QColor DtSymbolDrawer::theHighlightColor [static, protected]

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

• include/symbolDrawerInterface/symbolDrawer.h