QwtNullPaintDevice Class Reference

#include <qwt_null_paintdevice.h>

Inherited by QwtStyleSheetRecorder.

List of all members.

Public Member Functions
virtual void	drawEllipse (const QRectF &)
virtual void	drawEllipse (const QRect &)
virtual void	drawImage (const QRectF &, const QImage &, const QRectF &, Qt::ImageConversionFlags)
virtual void	drawLines (const QLine *, int)
virtual void	drawLines (const QLineF *, int)
virtual void	drawPath (const QPainterPath &)
virtual void	drawPixmap (const QRectF &, const QPixmap &, const QRectF &)
virtual void	drawPoints (const QPointF *, int)
virtual void	drawPoints (const QPoint *, int)
virtual void	drawPolygon (const QPointF *, int, QPaintEngine::PolygonDrawMode)
virtual void	drawPolygon (const QPoint *, int, QPaintEngine::PolygonDrawMode)
virtual void	drawRects (const QRect *, int)
virtual void	drawRects (const QRectF *, int)
virtual void	drawTextItem (const QPointF &, const QTextItem &)
virtual void	drawTiledPixmap (const QRectF &, const QPixmap &, const QPointF &s)
virtual int	metric (PaintDeviceMetric metric) const
virtual QPaintEngine *	paintEngine () const
	QwtNullPaintDevice (QPaintEngine::PaintEngineFeatures)
	QwtNullPaintDevice (const QSize &size, QPaintEngine::PaintEngineFeatures)
void	setSize (const QSize &)
QSize	size () const
virtual void	updateState (const QPaintEngineState &state)
virtual	~QwtNullPaintDevice ()

---

Detailed Description

A null paint device doing nothing.

Sometimes important layout/rendering geometries are not available or changable from the public Qt class interface. ( f.e hidden in the style implementation ).

QwtNullPaintDevice can be used to manipulate or filter out these informations by analyzing the stream of paint primitives.

F.e. QwtNullPaintDevice is used by QwtPlotCanvas to identify styled backgrounds with rounded corners.

---

Constructor & Destructor Documentation

QwtNullPaintDevice::QwtNullPaintDevice

(

QPaintEngine::PaintEngineFeatures

features

)

Constructor.

QwtNullPaintDevice::QwtNullPaintDevice	(	const QSize &	size,
		QPaintEngine::PaintEngineFeatures	features
	)

Constructor.

QwtNullPaintDevice::~QwtNullPaintDevice

(

)

[virtual]

Destructor.

---

Member Function Documentation

void QwtNullPaintDevice::drawEllipse

(

const QRectF &

rect

)

[virtual]

See QPaintEngine::drawEllipse()

void QwtNullPaintDevice::drawEllipse

(

const QRect &

rect

)

[virtual]

See QPaintEngine::drawEllipse()

void QwtNullPaintDevice::drawImage	(	const QRectF &	rect,
		const QImage &	image,
		const QRectF &	subRect,
		Qt::ImageConversionFlags	flags
	)		[virtual]

See QPaintEngine::drawImage()

void QwtNullPaintDevice::drawLines	(	const QLine *	lines,
		int	lineCount
	)		[virtual]

See QPaintEngine::drawLines()

void QwtNullPaintDevice::drawLines	(	const QLineF *	lines,
		int	lineCount
	)		[virtual]

See QPaintEngine::drawLines()

void QwtNullPaintDevice::drawPath

(

const QPainterPath &

path

)

[virtual]

See QPaintEngine::drawPath()

void QwtNullPaintDevice::drawPixmap	(	const QRectF &	rect,
		const QPixmap &	pm,
		const QRectF &	subRect
	)		[virtual]

See QPaintEngine::drawPixmap()

void QwtNullPaintDevice::drawPoints	(	const QPointF *	points,
		int	pointCount
	)		[virtual]

See QPaintEngine::drawPoints()

void QwtNullPaintDevice::drawPoints	(	const QPoint *	points,
		int	pointCount
	)		[virtual]

See QPaintEngine::drawPoints()

void QwtNullPaintDevice::drawPolygon	(	const QPointF *	points,
		int	pointCount,
		QPaintEngine::PolygonDrawMode	mode
	)		[virtual]

See QPaintEngine::drawPolygon()

void QwtNullPaintDevice::drawPolygon	(	const QPoint *	points,
		int	pointCount,
		QPaintEngine::PolygonDrawMode	mode
	)		[virtual]

See QPaintEngine::drawPolygon()

void QwtNullPaintDevice::drawRects	(	const QRect *	rects,
		int	rectCount
	)		[virtual]

See QPaintEngine::drawRects()

void QwtNullPaintDevice::drawRects	(	const QRectF *	rects,
		int	rectCount
	)		[virtual]

See QPaintEngine::drawRects()

void QwtNullPaintDevice::drawTextItem	(	const QPointF &	pos,
		const QTextItem &	textItem
	)		[virtual]

See QPaintEngine::drawTextItem()

void QwtNullPaintDevice::drawTiledPixmap	(	const QRectF &	rect,
		const QPixmap &	pixmap,
		const QPointF &	s
	)		[virtual]

See QPaintEngine::drawTiledPixmap()

int QwtNullPaintDevice::metric

(

PaintDeviceMetric

metric

)

const [virtual]

See QPaintDevice::metric()

See also:

setSize()

QPaintEngine * QwtNullPaintDevice::paintEngine

(

)

const [virtual]

See QPaintDevice::paintEngine()

void QwtNullPaintDevice::setSize

(

const QSize &

size

)

Set the size of the paint device

Parameters:

size

Size

See also:

size()

QSize QwtNullPaintDevice::size

(

)

const

Returns:

Size of the paint device

See also:

setSize()

void QwtNullPaintDevice::updateState

(

const QPaintEngineState &

state

)

[virtual]

See QPaintEngine::updateState()