A collection of QPainter workarounds. More...

#include <qwt_painter.h>

Static Public Member Functions
static void	setPolylineSplitting (bool)
	Enable/disable line splitting for the raster paint engine.

static bool	polylineSplitting ()

static void	setRoundingAlignment (bool)
	Enable/disable coordinate rounding before painting.

static bool	roundingAlignment ()
	Check whether coordinates should be rounded, before they are painted to a paint engine that rounds to integer values.

static bool	roundingAlignment (const QPainter *)

static void	drawText (QPainter *, qreal x, qreal y, const QString &)
	Wrapper for QPainter::drawText()

static void	drawText (QPainter *, const QPointF &, const QString &)
	Wrapper for QPainter::drawText()

static void	drawText (QPainter *, qreal x, qreal y, qreal w, qreal h, int flags, const QString &)
	Wrapper for QPainter::drawText()

static void	drawText (QPainter *, const QRectF &, int flags, const QString &)
	Wrapper for QPainter::drawText()

static void	drawSimpleRichText (QPainter *, const QRectF &, int flags, const QTextDocument &)
	Draw a text document into a rectangle.

static void	drawRect (QPainter *, qreal x, qreal y, qreal w, qreal h)
	Wrapper for QPainter::drawRect()

static void	drawRect (QPainter *, const QRectF &rect)
	Wrapper for QPainter::drawRect()

static void	fillRect (QPainter *, const QRectF &, const QBrush &)
	Wrapper for QPainter::fillRect()

static void	drawEllipse (QPainter *, const QRectF &)
	Wrapper for QPainter::drawEllipse()

static void	drawPie (QPainter *, const QRectF &r, int a, int alen)
	Wrapper for QPainter::drawPie()

static void	drawLine (QPainter *, qreal x1, qreal y1, qreal x2, qreal y2)
	Wrapper for QPainter::drawLine()

static void	drawLine (QPainter *, const QPointF &p1, const QPointF &p2)
	Wrapper for QPainter::drawLine()

static void	drawLine (QPainter *, const QLineF &)
	Wrapper for QPainter::drawLine()

static void	drawPolygon (QPainter *, const QPolygonF &)
	Wrapper for QPainter::drawPolygon()

static void	drawPolyline (QPainter *, const QPolygonF &)
	Wrapper for QPainter::drawPolyline()

static void	drawPolyline (QPainter , const QPointF , int pointCount)
	Wrapper for QPainter::drawPolyline()

static void	drawPolygon (QPainter *, const QPolygon &)
	Wrapper for QPainter::drawPolygon()

static void	drawPolyline (QPainter *, const QPolygon &)
	Wrapper for QPainter::drawPolyline()

static void	drawPolyline (QPainter , const QPoint , int pointCount)
	Wrapper for QPainter::drawPolyline()

static void	drawPoint (QPainter *, const QPoint &)
	Wrapper for QPainter::drawPoint()

static void	drawPoints (QPainter *, const QPolygon &)
	Wrapper for QPainter::drawPoints()

static void	drawPoints (QPainter , const QPoint , int pointCount)
	Wrapper for QPainter::drawPoints()

static void	drawPoint (QPainter *, qreal x, qreal y)
	Wrapper for QPainter::drawPoint()

static void	drawPoint (QPainter *, const QPointF &)
	Wrapper for QPainter::drawPoint()

static void	drawPoints (QPainter *, const QPolygonF &)
	Wrapper for QPainter::drawPoints()

static void	drawPoints (QPainter , const QPointF , int pointCount)
	Wrapper for QPainter::drawPoints()

static void	drawPath (QPainter *, const QPainterPath &)
	Wrapper for QPainter::drawPath()

static void	drawImage (QPainter *, const QRectF &, const QImage &)
	Wrapper for QPainter::drawImage()

static void	drawPixmap (QPainter *, const QRectF &, const QPixmap &)
	Wrapper for QPainter::drawPixmap()

static void	drawRoundFrame (QPainter *, const QRectF &, const QPalette &, int lineWidth, int frameStyle)
	Draw a round frame.

static void	drawRoundedFrame (QPainter *, const QRectF &, qreal xRadius, qreal yRadius, const QPalette &, int lineWidth, int frameStyle)
	Draw a rectangular frame with rounded borders.

static void	drawFrame (QPainter *, const QRectF &rect, const QPalette &palette, QPalette::ColorRole foregroundRole, int lineWidth, int midLineWidth, int frameStyle)
	Draw a rectangular frame.

static void	drawFocusRect (QPainter , const QWidget )
	Draw a focus rectangle on a widget using its style.

static void	drawFocusRect (QPainter , const QWidget , const QRect &)
	Draw a focus rectangle on a widget using its style.

static void	drawColorBar (QPainter *, const QwtColorMap &, const QwtInterval &, const QwtScaleMap &, Qt::Orientation, const QRectF &)
	Draw a color bar into a rectangle.

static bool	isAligning (const QPainter *)
	Check if the painter is using a paint engine that aligns coordinates to integers.

static bool	isX11GraphicsSystem ()
	Check if the application is running with the X11 graphics system.

static void	fillPixmap (const QWidget *, QPixmap &, const QPoint &offset=QPoint())
	Fill a pixmap with the content of a widget.

static void	fillRegion (QPainter *painter, const QRegion &region)
	Fill a region by drawing all its rectangles.

static void	fillBackground (QPainter painter, QWidget widget, const QVector< QRectF > &fillRects)
	Fill specified rectangular areas of a widget with its parent's background.

static void	fillBackground (QPainter painter, QWidget canvas)
	Auto-detect and fill a widget's background.

static void	drawBackgound (QPainter , const QRectF &, const QWidget )
	Fill rect with the background of a widget.

static void	drawCanvasBackgound (QPainter painter, QWidget canvas)
	Draw a widget's canvas background.

static void	drawStyledBackground (QWidget w, QPainter painter)
	Ensure widget background is drawn correctly per current GUI style.

static QPixmap	backingStore (QWidget *, const QSize &)
	Create a pixmap that can be used as backing store.

static qreal	devicePixelRatio (const QPaintDevice *)
	Get pixel ratio for a paint device.

static qreal	effectivePenWidth (const QPen &)

static int	horizontalAdvance (const QFontMetrics &, const QString &)
	Distance appropriate for drawing a subsequent character after text.

static qreal	horizontalAdvance (const QFontMetricsF &, const QString &)
	Distance appropriate for drawing a subsequent character after text.

static int	horizontalAdvance (const QFontMetrics &, QChar)
	Distance appropriate for drawing a subsequent character after ch.

static qreal	horizontalAdvance (const QFontMetricsF &, QChar)
	Distance appropriate for drawing a subsequent character after ch.

static QFont	scaledFont (const QFont &, const QPaintDevice *=nullptr)
	Adjust the DPI value of font according to the DPI value of the paint device.

static QWidget *	findBackgroundWidget (QWidget *w)
	Find the top-level widget with a visible background.

Detailed Description

A collection of QPainter workarounds.

Member Function Documentation

◆ backingStore()

QPixmap QwtPainter::backingStore	(	QWidget *	widget,
		const QSize &	size
	)

static

Create a pixmap that can be used as backing store.

◆ devicePixelRatio()

qreal QwtPainter::devicePixelRatio ( const QPaintDevice * paintDevice )

static

Get pixel ratio for a paint device.

◆ drawBackgound()

void QwtPainter::drawBackgound	(	QPainter *	painter,
		const QRectF &	rect,
		const QWidget *	widget
	)

static

Fill rect with the background of a widget.

◆ drawCanvasBackgound()

void QwtPainter::drawCanvasBackgound	(	QPainter *	painter,
		QWidget *	canvas
	)

static

Draw a widget's canvas background.

◆ drawColorBar()

void QwtPainter::drawColorBar	(	QPainter *	painter,
		const QwtColorMap &	colorMap,
		const QwtInterval &	interval,
		const QwtScaleMap &	scaleMap,
		Qt::Orientation	orientation,
		const QRectF &	rect
	)

static

Draw a color bar into a rectangle.

◆ drawFrame()

void QwtPainter::drawFrame	(	QPainter *	painter,
		const QRectF &	rect,
		const QPalette &	palette,
		QPalette::ColorRole	foregroundRole,
		int	frameWidth,
		int	midLineWidth,
		int	frameStyle
	)

static

Draw a rectangular frame.

◆ drawRoundedFrame()

void QwtPainter::drawRoundedFrame	(	QPainter *	painter,
		const QRectF &	rect,
		qreal	xRadius,
		qreal	yRadius,
		const QPalette &	palette,
		int	lineWidth,
		int	frameStyle
	)

static

Draw a rectangular frame with rounded borders.

◆ drawRoundFrame()

void QwtPainter::drawRoundFrame	(	QPainter *	painter,
		const QRectF &	rect,
		const QPalette &	palette,
		int	lineWidth,
		int	frameStyle
	)

static

Draw a round frame.

◆ drawSimpleRichText()

void QwtPainter::drawSimpleRichText	(	QPainter *	painter,
		const QRectF &	rect,
		int	flags,
		const QTextDocument &	text
	)

static

Draw a text document into a rectangle.

◆ drawStyledBackground()

void QwtPainter::drawStyledBackground	(	QWidget *	w,
		QPainter *	painter
	)

static

Ensure widget background is drawn correctly per current GUI style.

◆ effectivePenWidth()

qreal QwtPainter::effectivePenWidth ( const QPen & pen )

inlinestatic

Returns: pen.widthF() expanded to at least 1.0

Parameters

pen Pen

◆ fillBackground() [1/2]

void QwtPainter::fillBackground	(	QPainter *	painter,
		QWidget *	canvas
	)

static

Auto-detect and fill a widget's background.

◆ fillBackground() [2/2]

void QwtPainter::fillBackground	(	QPainter *	painter,
		QWidget *	widget,
		const QVector< QRectF > &	fillRects
	)

static

Fill specified rectangular areas of a widget with its parent's background.

◆ fillPixmap()

void QwtPainter::fillPixmap	(	const QWidget *	widget,
		QPixmap &	pixmap,
		const QPoint &	offset = `QPoint()`
	)

static

Fill a pixmap with the content of a widget.

◆ fillRegion()

void QwtPainter::fillRegion	(	QPainter *	painter,
		const QRegion &	region
	)

static

Fill a region by drawing all its rectangles.

◆ findBackgroundWidget()

QWidget * QwtPainter::findBackgroundWidget ( QWidget * w )

static

Find the top-level widget with a visible background.

◆ horizontalAdvance() [1/4]

int QwtPainter::horizontalAdvance	(	const QFontMetrics &	fontMetrics,
		const QString &	text
	)

static

Distance appropriate for drawing a subsequent character after text.

◆ horizontalAdvance() [2/4]

int QwtPainter::horizontalAdvance	(	const QFontMetrics &	fontMetrics,
		QChar	ch
	)

static

Distance appropriate for drawing a subsequent character after ch.

◆ horizontalAdvance() [3/4]

qreal QwtPainter::horizontalAdvance	(	const QFontMetricsF &	fontMetrics,
		const QString &	text
	)

static

Distance appropriate for drawing a subsequent character after text.

◆ horizontalAdvance() [4/4]

qreal QwtPainter::horizontalAdvance	(	const QFontMetricsF &	fontMetrics,
		QChar	ch
	)

static

Distance appropriate for drawing a subsequent character after ch.

◆ isAligning()

bool QwtPainter::isAligning ( const QPainter * painter )

static

Check if the painter is using a paint engine that aligns coordinates to integers.

◆ isX11GraphicsSystem()

bool QwtPainter::isX11GraphicsSystem ( )

static

Check if the application is running with the X11 graphics system.

◆ polylineSplitting()

bool QwtPainter::polylineSplitting ( )

inlinestatic

Returns: True, when line splitting for the raster paint engine is enabled.

See also: setPolylineSplitting()

◆ roundingAlignment() [1/2]

bool QwtPainter::roundingAlignment ( )

inlinestatic

Check whether coordinates should be rounded, before they are painted to a paint engine that rounds to integer values.

For other paint engines ( PDF, SVG ), this flag has no effect.

Returns: True, when rounding is enabled

See also: setRoundingAlignment(), isAligning()

◆ roundingAlignment() [2/2]

bool QwtPainter::roundingAlignment ( const QPainter * painter )

inlinestatic

Returns: roundingAlignment() && isAligning(painter);

Parameters

painter Painter

◆ scaledFont()

QFont QwtPainter::scaledFont	(	const QFont &	font,
		const QPaintDevice *	paintDevice = `nullptr`
	)

static

Adjust the DPI value of font according to the DPI value of the paint device.

◆ setPolylineSplitting()

void QwtPainter::setPolylineSplitting ( bool enable )

static

Enable/disable line splitting for the raster paint engine.

◆ setRoundingAlignment()

void QwtPainter::setRoundingAlignment ( bool enable )

static

Enable/disable coordinate rounding before painting.

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

/home/runner/work/QWT/QWT/src/plot/qwt_painter.h
/home/runner/work/QWT/QWT/src/plot/qwt_painter.cpp

Static Public Member Functions

Detailed Description

Member Function Documentation

◆ backingStore()

◆ devicePixelRatio()

◆ drawBackgound()

◆ drawCanvasBackgound()

◆ drawColorBar()

◆ drawFrame()

◆ drawRoundedFrame()

◆ drawRoundFrame()

◆ drawSimpleRichText()

◆ drawStyledBackground()

◆ effectivePenWidth()

◆ fillBackground() [1/2]

◆ fillBackground() [2/2]

◆ fillPixmap()

◆ fillRegion()

◆ findBackgroundWidget()

◆ horizontalAdvance() [1/4]

◆ horizontalAdvance() [2/4]

◆ horizontalAdvance() [3/4]

◆ horizontalAdvance() [4/4]

◆ isAligning()

◆ isX11GraphicsSystem()

◆ polylineSplitting()

◆ roundingAlignment() [1/2]

◆ roundingAlignment() [2/2]

◆ scaledFont()

◆ setPolylineSplitting()

◆ setRoundingAlignment()