Painter object trying to paint incrementally. More...

#include <qwt_plot_directpainter.h>

Inheritance diagram for QwtPlotDirectPainter:

Classes
class	PrivateData

Public Types
enum	Attribute { AtomicPainter = 0x01 , FullRepaint = 0x02 , CopyBackingStore = 0x04 }
	Paint attributes. More...

Public Member Functions
	QwtPlotDirectPainter (QObject *parent=nullptr)
	Constructor .

virtual	~QwtPlotDirectPainter ()
	Destructor .

void	setAttribute (Attribute, bool on)
	Set attribute .

bool	testAttribute (Attribute) const
	Test attribute .

void	setClipping (bool)
	Set clipping .

bool	hasClipping () const
	Check if clipping is enabled .

void	setClipRegion (const QRegion &)
	Set clip region .

QRegion	clipRegion () const
	Get clip region .

void	drawSeries (QwtPlotSeriesItem *, int from, int to)
	Draw series .

void	reset ()
	Reset the painter .

virtual bool	eventFilter (QObject , QEvent ) override
	Event filter .

Detailed Description

Painter object trying to paint incrementally.

Member Enumeration Documentation

◆ Attribute

enum QwtPlotDirectPainter::Attribute

Paint attributes.

Enumerator
AtomicPainter	Initializing a QPainter is an expensive operation. When AtomicPainter is set each call of drawSeries() opens/closes a temporary QPainter. Otherwise QwtPlotDirectPainter tries to use the same QPainter as long as possible.
FullRepaint	When FullRepaint is set the plot canvas is explicitly repainted after the samples have been rendered.
CopyBackingStore	When QwtPlotCanvas::BackingStore is enabled the painter has to paint to the backing store and the widget. In certain situations/environments it might be faster to paint to the backing store only and then copy the backing store to the canvas. This flag can also be useful for settings, where Qt fills the the clip region with the widget background.

Constructor & Destructor Documentation

◆ QwtPlotDirectPainter()

QwtPlotDirectPainter::QwtPlotDirectPainter ( QObject * parent = nullptr )

explicit

Constructor .

Constructor.

◆ ~QwtPlotDirectPainter()

QwtPlotDirectPainter::~QwtPlotDirectPainter ( )

virtual

Destructor .

Destructor

.

Member Function Documentation

◆ clipRegion()

QRegion QwtPlotDirectPainter::clipRegion ( ) const

Get clip region .

Get the currently set clip region.

◆ drawSeries()

void QwtPlotDirectPainter::drawSeries	(	QwtPlotSeriesItem *	seriesItem,
		int	from,
		int	to
	)

Draw series .

Draw a set of points of a seriesItem.

◆ eventFilter()

bool QwtPlotDirectPainter::eventFilter	(	QObject *	,
		QEvent *	event
	)

overridevirtual

Event filter .

Event filter.

◆ hasClipping()

bool QwtPlotDirectPainter::hasClipping ( ) const

Check if clipping is enabled .

Check if clipping is enabled.

◆ reset()

void QwtPlotDirectPainter::reset ( )

Reset the painter .

Close the internal QPainter

.

◆ setAttribute()

void QwtPlotDirectPainter::setAttribute	(	Attribute	attribute,
		bool	on
	)

Set attribute .

Change an attribute.

◆ setClipping()

void QwtPlotDirectPainter::setClipping ( bool enable )

Set clipping .

Enable or disable clipping.

◆ setClipRegion()

void QwtPlotDirectPainter::setClipRegion ( const QRegion & region )

Set clip region .

Assign a clip region and enable clipping.

◆ testAttribute()

bool QwtPlotDirectPainter::testAttribute ( Attribute attribute ) const

Test attribute .

Test an attribute.

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

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

Classes

Public Types

Public Member Functions