A null paint device doing nothing. More...

#include <qwt_null_paintdevice.h>

Inheritance diagram for QwtNullPaintDevice:

[legend]

Classes
class	PrivateData

Public Types
enum	Mode { NormalMode, PolygonPathMode, PathMode }
	Render mode. More...

Public Member Functions
virtual void	drawEllipse (const QRect &)
	See QPaintEngine::drawEllipse() More...

virtual void	drawEllipse (const QRectF &)
	See QPaintEngine::drawEllipse() More...

virtual void	drawImage (const QRectF &, const QImage &, const QRectF &, Qt::ImageConversionFlags)
	See QPaintEngine::drawImage() More...

virtual void	drawLines (const QLine *, int)
	See QPaintEngine::drawLines() More...

virtual void	drawLines (const QLineF *, int)
	See QPaintEngine::drawLines() More...

virtual void	drawPath (const QPainterPath &)
	See QPaintEngine::drawPath() More...

virtual void	drawPixmap (const QRectF &, const QPixmap &, const QRectF &)
	See QPaintEngine::drawPixmap() More...

virtual void	drawPoints (const QPoint *, int)
	See QPaintEngine::drawPoints() More...

virtual void	drawPoints (const QPointF *, int)
	See QPaintEngine::drawPoints() More...

virtual void	drawPolygon (const QPoint *, int, QPaintEngine::PolygonDrawMode)
	See QPaintEngine::drawPolygon() More...

virtual void	drawPolygon (const QPointF *, int, QPaintEngine::PolygonDrawMode)
	See QPaintEngine::drawPolygon() More...

virtual void	drawRects (const QRect *, int)
	See QPaintEngine::drawRects() More...

virtual void	drawRects (const QRectF *, int)
	See QPaintEngine::drawRects() More...

virtual void	drawTextItem (const QPointF &, const QTextItem &)
	See QPaintEngine::drawTextItem() More...

virtual void	drawTiledPixmap (const QRectF &, const QPixmap &, const QPointF &)
	See QPaintEngine::drawTiledPixmap() More...

virtual int	metric (PaintDeviceMetric) const QWT_OVERRIDE

Mode	mode () const

virtual QPaintEngine *	paintEngine () const QWT_OVERRIDE
	See QPaintDevice::paintEngine() More...

	QwtNullPaintDevice ()
	Constructor. More...

void	setMode (Mode)

virtual void	updateState (const QPaintEngineState &)
	See QPaintEngine::updateState() More...

virtual	~QwtNullPaintDevice ()
	Destructor. More...

Protected Member Functions
virtual QSize	sizeMetrics () const =0

Private Attributes
PrivateData *	m_data

PaintEngine *	m_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 32 of file qwt_null_paintdevice.h.

Member Enumeration Documentation

◆ Mode

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 47 of file qwt_null_paintdevice.h.

Constructor & Destructor Documentation

◆ QwtNullPaintDevice()

QwtNullPaintDevice::QwtNullPaintDevice ( )

Constructor.

Definition at line 367 of file qwt_null_paintdevice.cpp.

◆ ~QwtNullPaintDevice()

QwtNullPaintDevice::~QwtNullPaintDevice ( )

virtual

Destructor.

Definition at line 374 of file qwt_null_paintdevice.cpp.

Member Function Documentation

◆ drawEllipse() [1/2]

void QwtNullPaintDevice::drawEllipse ( const QRect & rect )

virtual

See QPaintEngine::drawEllipse()

Reimplemented in QWT_FINAL.

Definition at line 512 of file qwt_null_paintdevice.cpp.

◆ drawEllipse() [2/2]

void QwtNullPaintDevice::drawEllipse ( const QRectF & rect )

virtual

See QPaintEngine::drawEllipse()

Reimplemented in QWT_FINAL.

Definition at line 506 of file qwt_null_paintdevice.cpp.

◆ drawImage()

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

virtual

See QPaintEngine::drawImage()

Reimplemented in QwtGraphic, and QWT_FINAL.

Definition at line 587 of file qwt_null_paintdevice.cpp.

◆ drawLines() [1/2]

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

virtual

See QPaintEngine::drawLines()

Reimplemented in QWT_FINAL.

Definition at line 490 of file qwt_null_paintdevice.cpp.

◆ drawLines() [2/2]

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

virtual

See QPaintEngine::drawLines()

Reimplemented in QWT_FINAL.

Definition at line 498 of file qwt_null_paintdevice.cpp.

◆ drawPath()

void QwtNullPaintDevice::drawPath ( const QPainterPath & path )

virtual

See QPaintEngine::drawPath()

Reimplemented in QwtGraphic, and QWT_FINAL.

Definition at line 518 of file qwt_null_paintdevice.cpp.

◆ drawPixmap()

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

virtual

See QPaintEngine::drawPixmap()

Reimplemented in QwtGraphic, and QWT_FINAL.

Definition at line 560 of file qwt_null_paintdevice.cpp.

◆ drawPoints() [1/2]

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

virtual

See QPaintEngine::drawPoints()

Reimplemented in QWT_FINAL.

Definition at line 532 of file qwt_null_paintdevice.cpp.

◆ drawPoints() [2/2]

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

virtual

See QPaintEngine::drawPoints()

Reimplemented in QWT_FINAL.

Definition at line 524 of file qwt_null_paintdevice.cpp.

◆ drawPolygon() [1/2]

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

virtual

See QPaintEngine::drawPolygon()

Definition at line 550 of file qwt_null_paintdevice.cpp.

◆ drawPolygon() [2/2]

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

virtual

See QPaintEngine::drawPolygon()

Definition at line 540 of file qwt_null_paintdevice.cpp.

◆ drawRects() [1/2]

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

virtual

See QPaintEngine::drawRects()

Reimplemented in QWT_FINAL.

Definition at line 474 of file qwt_null_paintdevice.cpp.

◆ drawRects() [2/2]

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

virtual

See QPaintEngine::drawRects()

Reimplemented in QWT_FINAL.

Definition at line 482 of file qwt_null_paintdevice.cpp.

◆ drawTextItem()

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

virtual

See QPaintEngine::drawTextItem()

Reimplemented in QWT_FINAL.

Definition at line 569 of file qwt_null_paintdevice.cpp.

◆ drawTiledPixmap()

void QwtNullPaintDevice::drawTiledPixmap	(	const QRectF &	rect,
		const QPixmap &	pixmap,
		const QPointF &	subRect
	)

virtual

See QPaintEngine::drawTiledPixmap()

Reimplemented in QWT_FINAL.

Definition at line 577 of file qwt_null_paintdevice.cpp.

◆ metric()

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 422 of file qwt_null_paintdevice.cpp.

◆ mode()

QwtNullPaintDevice::Mode QwtNullPaintDevice::mode ( ) const

Returns: Render mode

See also: setMode()

Definition at line 395 of file qwt_null_paintdevice.cpp.

◆ paintEngine()

QPaintEngine * QwtNullPaintDevice::paintEngine ( ) const

virtual

See QPaintDevice::paintEngine()

Definition at line 401 of file qwt_null_paintdevice.cpp.

◆ setMode()

void QwtNullPaintDevice::setMode ( Mode mode )

Set the render mode

Parameters

mode New mode

See also: mode()

Definition at line 386 of file qwt_null_paintdevice.cpp.

◆ sizeMetrics()

virtual QSize QwtNullPaintDevice::sizeMetrics ( ) const

protectedpure virtual

Returns: Size needed to implement metric()

Implemented in QwtGraphic.

◆ updateState()

void QwtNullPaintDevice::updateState ( const QPaintEngineState & state )

virtual

See QPaintEngine::updateState()

Reimplemented in QwtGraphic, and QWT_FINAL.

Definition at line 598 of file qwt_null_paintdevice.cpp.

Member Data Documentation

◆ m_data

PrivateData* QwtNullPaintDevice::m_data

private

Definition at line 130 of file qwt_null_paintdevice.h.

◆ m_engine

PaintEngine* QwtNullPaintDevice::m_engine

private

Definition at line 127 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

◆ Mode

Constructor & Destructor Documentation

◆ QwtNullPaintDevice()

◆ ~QwtNullPaintDevice()

Member Function Documentation

◆ drawEllipse() [1/2]

◆ drawEllipse() [2/2]

◆ drawImage()

◆ drawLines() [1/2]

◆ drawLines() [2/2]

◆ drawPath()

◆ drawPixmap()

◆ drawPoints() [1/2]

◆ drawPoints() [2/2]

◆ drawPolygon() [1/2]

◆ drawPolygon() [2/2]

◆ drawRects() [1/2]

◆ drawRects() [2/2]

◆ drawTextItem()

◆ drawTiledPixmap()

◆ metric()

◆ mode()

◆ paintEngine()

◆ setMode()

◆ sizeMetrics()

◆ updateState()

Member Data Documentation

◆ m_data

◆ m_engine