Dokumentacja klasy QCPPaintBufferPixmap

A paint buffer based on QPixmap, using software raster rendering. Więcej...

#include <qcustomplot.hh>

Diagram dziedziczenia dla QCPPaintBufferPixmap

Diagram współpracy dla QCPPaintBufferPixmap:

Metody publiczne
	QCPPaintBufferPixmap (const QSize &size, double devicePixelRatio)
virtual	~QCPPaintBufferPixmap ()
virtual QCPPainter *	startPainting () Q_DECL_OVERRIDE
virtual void	draw (QCPPainter *painter) const Q_DECL_OVERRIDE
void	clear (const QColor &color) Q_DECL_OVERRIDE
Metody publiczne dziedziczone z QCPAbstractPaintBuffer
	QCPAbstractPaintBuffer (const QSize &size, double devicePixelRatio)
virtual	~QCPAbstractPaintBuffer ()
QSize	size () const
bool	invalidated () const
double	devicePixelRatio () const
void	setSize (const QSize &size)
void	setInvalidated (bool invalidated=true)
void	setDevicePixelRatio (double ratio)
virtual void	donePainting ()

Metody chronione
virtual void	reallocateBuffer () Q_DECL_OVERRIDE

Atrybuty chronione
QPixmap	mBuffer
Atrybuty chronione dziedziczone z QCPAbstractPaintBuffer
QSize	mSize
double	mDevicePixelRatio
bool	mInvalidated

Opis szczegółowy

This paint buffer is the default and fall-back paint buffer which uses software rendering and QPixmap as internal buffer. It is used if QCustomPlot::setOpenGl is false.

Dokumentacja konstruktora i destruktora

QCPPaintBufferPixmap::QCPPaintBufferPixmap ( const QSize &  size, double  devicePixelRatio  )

explicit

Creates a pixmap paint buffer instancen with the specified size and devicePixelRatio, if applicable.

QCPPaintBufferPixmap::~QCPPaintBufferPixmap ( )

virtual

Dokumentacja funkcji składowych

void QCPPaintBufferPixmap::clear ( const QColor &  color )

virtual

Fills the entire buffer with the provided color. To have an empty transparent buffer, use the named color Qt::transparent.

This method must not be called if there is currently a painter (acquired with startPainting) active.

Implementuje QCPAbstractPaintBuffer.

void QCPPaintBufferPixmap::draw ( QCPPainter *  painter ) const

virtual

Draws the contents of this buffer with the provided painter. This is the method that is used to finally join all paint buffers and draw them onto the screen.

Implementuje QCPAbstractPaintBuffer.

void QCPPaintBufferPixmap::reallocateBuffer ( )

protectedvirtual

Reallocates the internal buffer with the currently configured size (setSize) and device pixel ratio, if applicable (setDevicePixelRatio). It is called as soon as any of those properties are changed on this paint buffer.

Nota

Subclasses of QCPAbstractPaintBuffer must call their reimplementation of this method in their constructor, to perform the first allocation (this can not be done by the base class because calling pure virtual methods in base class constructors is not possible).

Implementuje QCPAbstractPaintBuffer.

QCPPainter * QCPPaintBufferPixmap::startPainting ( )

virtual

Returns a QCPPainter which is ready to draw to this buffer. The ownership and thus the responsibility to delete the painter after the painting operations are complete is given to the caller of this method.

Once you are done using the painter, delete the painter and call donePainting.

While a painter generated with this method is active, you must not call setSize, setDevicePixelRatio or clear.

This method may return 0, if a painter couldn't be activated on the buffer. This usually indicates a problem with the respective painting backend.

Implementuje QCPAbstractPaintBuffer.

Dokumentacja atrybutów składowych

QPixmap QCPPaintBufferPixmap::mBuffer

protected

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Dokumentacja dla tej klasy została wygenerowana z plików:

• qcustomplot.hh
• qcustomplot.cpp