可缩放图形的绘制设备更多...

#include <qwt_graphic.h>

类 QwtGraphic 继承关系图:

类
class	PathInfo

class	PrivateData

Public 类型
enum	RenderHint { RenderPensUnscaled = 0x1 }
	渲染图形的提示更多...

enum	CommandType { VectorData = 1 << 0 , RasterData = 1 << 1 , Transformation = 1 << 2 }
	指示图形是否包含特定类型的绘制命令更多...

Public 类型继承自 QwtNullPaintDevice
enum	Mode { NormalMode , PolygonPathMode , PathMode }
	绘制设备的渲染模式更多...

Public 成员函数
	QwtGraphic ()
	构造函数

	QwtGraphic (const QwtGraphic &)
	复制构造函数

virtual	~QwtGraphic ()
	析构函数

QwtGraphic &	operator= (const QwtGraphic &)
	赋值运算符

void	reset ()
	清除所有存储的命令

bool	isNull () const
	检查图形是否为空

bool	isEmpty () const
	检查图形是否为空

CommandTypes	commandTypes () const
	获取正在使用的绘制命令类型

void	render (QPainter *) const
	重放所有记录的绘制命令

void	render (QPainter *, const QSizeF &, Qt::AspectRatioMode=Qt::IgnoreAspectRatio) const
	重放所有记录的绘制命令，缩放以适应给定大小

void	render (QPainter *, const QPointF &, Qt::Alignment=Qt::AlignTop\|Qt::AlignLeft) const
	重放所有记录的绘制命令，对齐到指定位置

void	render (QPainter *, const QRectF &, Qt::AspectRatioMode=Qt::IgnoreAspectRatio) const
	重放所有记录的绘制命令，缩放以适应给定矩形

QPixmap	toPixmap (qreal devicePixelRatio=0.0) const
	将图形转换为默认大小的 QPixmap

QPixmap	toPixmap (const QSize &, Qt::AspectRatioMode=Qt::IgnoreAspectRatio, qreal devicePixelRatio=0.0) const
	将图形转换为指定大小的 QPixmap

QImage	toImage (qreal devicePixelRatio=0.0) const
	将图形转换为默认大小的 QImage

QImage	toImage (const QSize &, Qt::AspectRatioMode=Qt::IgnoreAspectRatio, qreal devicePixelRatio=0.0) const
	将图形转换为指定大小的 QImage

QRectF	scaledBoundingRect (qreal sx, qreal sy) const
	计算缩放图形的目标矩形

QRectF	boundingRect () const
	获取边界矩形

QRectF	controlPointRect () const
	获取控制点矩形

const QVector< QwtPainterCommand > &	commands () const
	获取记录的绘制命令列表

void	setCommands (const QVector< QwtPainterCommand > &)
	追加绘制命令

void	setDefaultSize (const QSizeF &)
	设置默认大小

QSizeF	defaultSize () const
	获取默认大小

qreal	heightForWidth (qreal width) const
	根据给定宽度查找高度

qreal	widthForHeight (qreal height) const
	根据给定高度查找宽度

void	setRenderHint (RenderHint, bool on=true)
	切换渲染提示

bool	testRenderHint (RenderHint) const
	测试渲染提示

RenderHints	renderHints () const
	获取渲染提示

Public 成员函数继承自 QwtNullPaintDevice
	QwtNullPaintDevice ()
	Constructor

virtual	~QwtNullPaintDevice ()
	Destructor

void	setMode (Mode)
	Set the render mode

Mode	mode () const
	Get the render mode

virtual QPaintEngine *	paintEngine () const override
	Return the paint engine

virtual int	metric (PaintDeviceMetric) const override
	Return metric information for the paint device

virtual void	drawRects (const QRect *, int)
	Draw rectangles (integer version)

virtual void	drawRects (const QRectF *, int)
	Draw rectangles (floating point version)

virtual void	drawLines (const QLine *, int)
	Draw lines (integer version)

virtual void	drawLines (const QLineF *, int)
	Draw lines (floating point version)

virtual void	drawEllipse (const QRectF &)
	Draw ellipse (floating point version)

virtual void	drawEllipse (const QRect &)
	Draw ellipse (integer version)

virtual void	drawPoints (const QPointF *, int)
	Draw points (floating point version)

virtual void	drawPoints (const QPoint *, int)
	Draw points (integer version)

virtual void	drawPolygon (const QPointF *, int, QPaintEngine::PolygonDrawMode)
	Draw polygon (floating point version)

virtual void	drawPolygon (const QPoint *, int, QPaintEngine::PolygonDrawMode)
	Draw polygon (integer version)

virtual void	drawTextItem (const QPointF &, const QTextItem &)
	Draw a text item

virtual void	drawTiledPixmap (const QRectF &, const QPixmap &, const QPointF &)
	Draw a tiled pixmap

Protected 成员函数
virtual QSize	sizeMetrics () const override

virtual void	drawPath (const QPainterPath &) override
	Store a path command in the command list

virtual void	drawPixmap (const QRectF &, const QPixmap &, const QRectF &) override
	Store a pixmap command in the command list

virtual void	drawImage (const QRectF &, const QImage &, const QRectF &, Qt::ImageConversionFlags) override
	Store a image command in the command list

virtual void	updateState (const QPaintEngineState &) override
	Store a state command in the command list

详细描述

可缩放图形的绘制设备

成员枚举类型说明

◆ CommandType

enum QwtGraphic::CommandType

指示图形是否包含特定类型的绘制命令

枚举值
VectorData	图形包含可缩放的矢量数据
RasterData	图形包含光栅数据（QPixmap 或 QImage）
Transformation	图形包含超出简单平移的变换

◆ RenderHint

enum QwtGraphic::RenderHint

渲染图形的提示

枚举值

RenderPensUnscaled

渲染 QwtGraphic 时，在 render() 内部设置 controlPointRect() 与目标矩形坐标之间的特定缩放。

设置 RenderPensUnscaled 时，此特定缩放仅应用于控制点，不应用于画笔。所有其他绘制变换（由应用程序代码设置）按常规方式工作。

构造及析构函数说明

◆ QwtGraphic() [1/2]

QwtGraphic::QwtGraphic ( )

构造函数

◆ QwtGraphic() [2/2]

QwtGraphic::QwtGraphic ( const QwtGraphic & other )

复制构造函数

◆ ~QwtGraphic()

QwtGraphic::~QwtGraphic ( )

virtual

析构函数

成员函数说明

◆ boundingRect()

QRectF QwtGraphic::boundingRect ( ) const

获取边界矩形

◆ commands()

const QVector< QwtPainterCommand > & QwtGraphic::commands ( ) const

获取记录的绘制命令列表

◆ commandTypes()

QwtGraphic::CommandTypes QwtGraphic::commandTypes ( ) const

获取正在使用的绘制命令类型

◆ controlPointRect()

QRectF QwtGraphic::controlPointRect ( ) const

获取控制点矩形

◆ defaultSize()

QSizeF QwtGraphic::defaultSize ( ) const

获取默认大小

◆ drawImage()

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

overrideprotectedvirtual

Store a image command in the command list

参数

rect	target rectangle
image	Image to be painted
subRect	Reactangle of the pixmap to be painted
flags	Image conversion flags

参见: QPaintEngine::drawImage()

重载 QwtNullPaintDevice .

◆ drawPath()

void QwtGraphic::drawPath ( const QPainterPath & path )

overrideprotectedvirtual

Store a path command in the command list

参数

path	Painter path

参见: QPaintEngine::drawPath()

重载 QwtNullPaintDevice .

◆ drawPixmap()

void QwtGraphic::drawPixmap	(	const QRectF &	rect,
		const QPixmap &	pixmap,
		const QRectF &	subRect
	)

overrideprotectedvirtual

Store a pixmap command in the command list

参数

rect	target rectangle
pixmap	Pixmap to be painted
subRect	Reactangle of the pixmap to be painted

参见: QPaintEngine::drawPixmap()

重载 QwtNullPaintDevice .

◆ heightForWidth()

qreal QwtGraphic::heightForWidth ( qreal width ) const

根据给定宽度查找高度

◆ isEmpty()

bool QwtGraphic::isEmpty ( ) const

检查图形是否为空

◆ isNull()

bool QwtGraphic::isNull ( ) const

检查图形是否为空

◆ operator=()

QwtGraphic & QwtGraphic::operator= ( const QwtGraphic & other )

赋值运算符

◆ render() [1/4]

void QwtGraphic::render ( QPainter * painter ) const

重放所有记录的绘制命令

◆ render() [2/4]

void QwtGraphic::render	(	QPainter *	painter,
		const QPointF &	pos,
		Qt::Alignment	alignment = `Qt::AlignTop \| Qt::AlignLeft`
	)		const

重放所有记录的绘制命令，对齐到指定位置

◆ render() [3/4]

void QwtGraphic::render	(	QPainter *	painter,
		const QRectF &	rect,
		Qt::AspectRatioMode	aspectRatioMode = `Qt::IgnoreAspectRatio`
	)		const

重放所有记录的绘制命令，缩放以适应给定矩形

◆ render() [4/4]

void QwtGraphic::render	(	QPainter *	painter,
		const QSizeF &	size,
		Qt::AspectRatioMode	aspectRatioMode = `Qt::IgnoreAspectRatio`
	)		const

重放所有记录的绘制命令，缩放以适应给定大小

◆ renderHints()

QwtGraphic::RenderHints QwtGraphic::renderHints ( ) const

获取渲染提示

◆ reset()

void QwtGraphic::reset ( )

清除所有存储的命令

◆ scaledBoundingRect()

QRectF QwtGraphic::scaledBoundingRect	(	qreal	sx,
		qreal	sy
	)		const

计算缩放图形的目标矩形

◆ setCommands()

void QwtGraphic::setCommands ( const QVector< QwtPainterCommand > & commands )

追加绘制命令

◆ setDefaultSize()

void QwtGraphic::setDefaultSize ( const QSizeF & size )

设置默认大小

◆ setRenderHint()

void QwtGraphic::setRenderHint	(	RenderHint	hint,
		bool	on = `true`
	)

切换渲染提示

◆ sizeMetrics()

QSize QwtGraphic::sizeMetrics ( ) const

overrideprotectedvirtual

返回: Ceiled defaultSize()

实现了 QwtNullPaintDevice.

◆ testRenderHint()

bool QwtGraphic::testRenderHint ( RenderHint hint ) const

测试渲染提示

◆ toImage() [1/2]

QImage QwtGraphic::toImage	(	const QSize &	size,
		Qt::AspectRatioMode	aspectRatioMode = `Qt::IgnoreAspectRatio`,
		qreal	devicePixelRatio = `0.0`
	)		const

将图形转换为指定大小的 QImage

◆ toImage() [2/2]

QImage QwtGraphic::toImage ( qreal devicePixelRatio = 0.0 ) const

将图形转换为默认大小的 QImage

◆ toPixmap() [1/2]

QPixmap QwtGraphic::toPixmap	(	const QSize &	size,
		Qt::AspectRatioMode	aspectRatioMode = `Qt::IgnoreAspectRatio`,
		qreal	devicePixelRatio = `0.0`
	)		const

将图形转换为指定大小的 QPixmap

◆ toPixmap() [2/2]

QPixmap QwtGraphic::toPixmap ( qreal devicePixelRatio = 0.0 ) const

将图形转换为默认大小的 QPixmap

◆ updateState()

void QwtGraphic::updateState ( const QPaintEngineState & state )

overrideprotectedvirtual

Store a state command in the command list

参数

state State to be stored

参见: QPaintEngine::updateState()

重载 QwtNullPaintDevice .

◆ widthForHeight()

qreal QwtGraphic::widthForHeight ( qreal height ) const

根据给定高度查找宽度

该类的文档由以下文件生成:

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

类

Public 类型

Public 成员函数

Protected 成员函数

详细描述

成员枚举类型说明

◆ CommandType

◆ RenderHint

构造及析构函数说明

◆ QwtGraphic() [1/2]

◆ QwtGraphic() [2/2]

◆ ~QwtGraphic()

成员函数说明

◆ boundingRect()

◆ commands()

◆ commandTypes()

◆ controlPointRect()

◆ defaultSize()

◆ drawImage()

◆ drawPath()

◆ drawPixmap()

◆ heightForWidth()

◆ isEmpty()

◆ isNull()

◆ operator=()

◆ render() [1/4]

◆ render() [2/4]

◆ render() [3/4]

◆ render() [4/4]

◆ renderHints()

◆ reset()

◆ scaledBoundingRect()

◆ setCommands()

◆ setDefaultSize()

◆ setRenderHint()

◆ sizeMetrics()

◆ testRenderHint()

◆ toImage() [1/2]

◆ toImage() [2/2]

◆ toPixmap() [1/2]

◆ toPixmap() [2/2]

◆ updateState()

◆ widthForHeight()