A null paint device doing nothing. More...

#include <qwt_null_paintdevice.h>

Inheritance diagram for QwtNullPaintDevice:

Classes
class	PaintEngine
class	PrivateData
Public Types
enum	Mode { NormalMode, PolygonPathMode, PathMode }
	Render mode. More...
Public Member Functions
virtual void	drawEllipse (const QRectF &)
	See QPaintEngine::drawEllipse()
virtual void	drawEllipse (const QRect &)
	See QPaintEngine::drawEllipse()
virtual void	drawImage (const QRectF &, const QImage &, const QRectF &, Qt::ImageConversionFlags)
	See QPaintEngine::drawImage()
virtual void	drawLines (const QLine *, int)
	See QPaintEngine::drawLines()
virtual void	drawLines (const QLineF *, int)
	See QPaintEngine::drawLines()
virtual void	drawPath (const QPainterPath &)
	See QPaintEngine::drawPath()
virtual void	drawPixmap (const QRectF &, const QPixmap &, const QRectF &)
	See QPaintEngine::drawPixmap()
virtual void	drawPoints (const QPointF *, int)
	See QPaintEngine::drawPoints()
virtual void	drawPoints (const QPoint *, int)
	See QPaintEngine::drawPoints()
virtual void	drawPolygon (const QPointF *, int, QPaintEngine::PolygonDrawMode)
	See QPaintEngine::drawPolygon()
virtual void	drawPolygon (const QPoint *, int, QPaintEngine::PolygonDrawMode)
	See QPaintEngine::drawPolygon()
virtual void	drawRects (const QRect *, int)
	See QPaintEngine::drawRects()
virtual void	drawRects (const QRectF *, int)
	See QPaintEngine::drawRects()
virtual void	drawTextItem (const QPointF &, const QTextItem &)
	See QPaintEngine::drawTextItem()
virtual void	drawTiledPixmap (const QRectF &, const QPixmap &, const QPointF &s)
	See QPaintEngine::drawTiledPixmap()
virtual int	metric (PaintDeviceMetric metric) const
Mode	mode () const
virtual QPaintEngine *	paintEngine () const
	See QPaintDevice::paintEngine()
	QwtNullPaintDevice ()
	Constructor.
void	setMode (Mode)
virtual void	updateState (const QPaintEngineState &state)
	See QPaintEngine::updateState()
virtual	~QwtNullPaintDevice ()
	Destructor.
Protected Member Functions
virtual QSize	sizeMetrics () const =0
Private Attributes
PrivateData *	d_data
PaintEngine *	d_engine

Detailed Description

A null paint device doing nothing.

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

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

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

Definition at line 31 of file qwt_null_paintdevice.h.

Member Enumeration Documentation

enum QwtNullPaintDevice::Mode

Render mode.

See also:: setMode(), mode()

Enumerator:

NormalMode

All vector graphic primitives are painted by the corresponding draw methods

PolygonPathMode

Vector graphic primitives ( beside polygons ) are mapped to a QPainterPath and are painted by drawPath. In PathMode mode only a few draw methods are called:

PathMode

Vector graphic primitives are mapped to a QPainterPath and are painted by drawPath. In PathMode mode only a few draw methods are called:

Definition at line 39 of file qwt_null_paintdevice.h.

Constructor & Destructor Documentation

QwtNullPaintDevice::QwtNullPaintDevice ( )

Constructor.

Definition at line 358 of file qwt_null_paintdevice.cpp.

QwtNullPaintDevice::~QwtNullPaintDevice ( ) [virtual]

Destructor.

Definition at line 365 of file qwt_null_paintdevice.cpp.

Member Function Documentation

void QwtNullPaintDevice::drawEllipse ( const QRectF & rect ) [virtual]

See QPaintEngine::drawEllipse()

Definition at line 497 of file qwt_null_paintdevice.cpp.

void QwtNullPaintDevice::drawEllipse ( const QRect & rect ) [virtual]

See QPaintEngine::drawEllipse()

Definition at line 503 of file qwt_null_paintdevice.cpp.

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

See QPaintEngine::drawImage()

Reimplemented in QwtGraphic.

Definition at line 578 of file qwt_null_paintdevice.cpp.

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

See QPaintEngine::drawLines()

Definition at line 481 of file qwt_null_paintdevice.cpp.

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

See QPaintEngine::drawLines()

Definition at line 489 of file qwt_null_paintdevice.cpp.

void QwtNullPaintDevice::drawPath ( const QPainterPath & path ) [virtual]

See QPaintEngine::drawPath()

Reimplemented in QwtGraphic, and QwtStyleSheetRecorder.

Definition at line 509 of file qwt_null_paintdevice.cpp.

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

See QPaintEngine::drawPixmap()

Reimplemented in QwtGraphic.

Definition at line 551 of file qwt_null_paintdevice.cpp.

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

See QPaintEngine::drawPoints()

Definition at line 515 of file qwt_null_paintdevice.cpp.

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

See QPaintEngine::drawPoints()

Definition at line 523 of file qwt_null_paintdevice.cpp.

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

See QPaintEngine::drawPolygon()

Definition at line 531 of file qwt_null_paintdevice.cpp.

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

See QPaintEngine::drawPolygon()

Definition at line 541 of file qwt_null_paintdevice.cpp.

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

See QPaintEngine::drawRects()

Reimplemented in QwtStyleSheetRecorder.

Definition at line 465 of file qwt_null_paintdevice.cpp.

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

See QPaintEngine::drawRects()

Reimplemented in QwtStyleSheetRecorder.

Definition at line 473 of file qwt_null_paintdevice.cpp.

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

See QPaintEngine::drawTextItem()

Definition at line 560 of file qwt_null_paintdevice.cpp.

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

See QPaintEngine::drawTiledPixmap()

Definition at line 568 of file qwt_null_paintdevice.cpp.

int QwtNullPaintDevice::metric ( PaintDeviceMetric deviceMetric ) const [virtual]

See QPaintDevice::metric()

Parameters:

deviceMetric Type of metric

Returns:: Metric information for the given paint device metric.

See also:: sizeMetrics()

Definition at line 413 of file qwt_null_paintdevice.cpp.

QwtNullPaintDevice::Mode QwtNullPaintDevice::mode ( ) const

Returns:: Render mode

See also:: setMode()

Definition at line 386 of file qwt_null_paintdevice.cpp.

QPaintEngine * QwtNullPaintDevice::paintEngine ( ) const [virtual]

See QPaintDevice::paintEngine()

Definition at line 392 of file qwt_null_paintdevice.cpp.

void QwtNullPaintDevice::setMode ( Mode mode )

Set the render mode

Parameters:

mode New mode

See also:: mode()

Definition at line 377 of file qwt_null_paintdevice.cpp.

virtual QSize QwtNullPaintDevice::sizeMetrics ( ) const [protected, pure virtual]

Returns:: Size needed to implement metric()

Implemented in QwtGraphic, and QwtStyleSheetRecorder.

void QwtNullPaintDevice::updateState ( const QPaintEngineState & state ) [virtual]

See QPaintEngine::updateState()

Reimplemented in QwtGraphic, and QwtStyleSheetRecorder.

Definition at line 589 of file qwt_null_paintdevice.cpp.

Member Data Documentation

PrivateData* QwtNullPaintDevice::d_data [private]

Reimplemented in QwtGraphic.

Definition at line 122 of file qwt_null_paintdevice.h.

PaintEngine* QwtNullPaintDevice::d_engine [private]

Definition at line 119 of file qwt_null_paintdevice.h.

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

Classes

Public Types

Public Member Functions

Protected Member Functions

Private Attributes

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation