极坐标绘图项的基类更多...

#include <qwt_polar_item.h>

类 QwtPolarItem 继承关系图:

类
class	PrivateData

Public 类型
enum	RttiValues { Rtti_PolarItem = 0 , Rtti_PolarGrid , Rtti_PolarMarker , Rtti_PolarCurve , Rtti_PolarSpectrogram , Rtti_PolarUserItem = 1000 }

enum	ItemAttribute { Legend = 0x01 , AutoScale = 0x02 }

enum	RenderHint { RenderAntialiased = 0x01 }

Public 成员函数
	QwtPolarItem (const QwtText &title=QwtText())
	Constructor

virtual	~QwtPolarItem ()
	Destructor

void	attach (QwtPolarPlot *plot)
	Attach the item to a plot

void	detach ()
	Detach the item from its plot

QwtPolarPlot *	plot () const
	Get the attached plot

void	setTitle (const QString &title)
	Set the title from a QString

void	setTitle (const QwtText &title)
	Set the title from a QwtText

const QwtText &	title () const
	Get the title

virtual int	rtti () const
	Get the runtime type information

void	setItemAttribute (ItemAttribute, bool on=true)
	Set an item attribute

bool	testItemAttribute (ItemAttribute) const
	Test an item attribute

void	setRenderHint (RenderHint, bool on=true)
	Set a render hint

bool	testRenderHint (RenderHint) const
	Test a render hint

void	setRenderThreadCount (uint numThreads)
	Set the number of render threads

uint	renderThreadCount () const
	Get the number of render threads

double	z () const
	Get the z value

void	setZ (double z)
	Set the z value

void	show ()
	Show the item

void	hide ()
	Hide the item

virtual void	setVisible (bool)
	Set the visibility

bool	isVisible () const
	Get the visibility

virtual void	itemChanged ()
	Update the item and trigger autoRefresh

virtual void	legendChanged ()
	Update the legend

virtual void	draw (QPainter *painter, const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap, const QPointF &pole, double radius, const QRectF &canvasRect) const =0

virtual QwtInterval	boundingInterval (int scaleId) const
	Get the bounding interval for a scale

virtual void	updateScaleDiv (const QwtScaleDiv &, const QwtScaleDiv &, const QwtInterval &)
	Update the scale division

virtual int	marginHint () const
	Get the margin hint

void	setLegendIconSize (const QSize &)
	Set the legend icon size

QSize	legendIconSize () const
	Get the legend icon size

virtual QList< QwtLegendData >	legendData () const
	Get the legend data

virtual QwtGraphic	legendIcon (int index, const QSizeF &) const
	Get the legend icon

详细描述

极坐标绘图项的基类

成员枚举类型说明

◆ ItemAttribute

enum QwtPolarItem::ItemAttribute

绘图项属性

参见: setItemAttribute(), testItemAttribute()

枚举值
Legend	The item is represented on the legend.
AutoScale	The boundingRect() of the item is included in the autoscaling calculation.

◆ RenderHint

enum QwtPolarItem::RenderHint

渲染提示

参见: setRenderHint(), testRenderHint()

枚举值
RenderAntialiased	Enable antialiasing

◆ RttiValues

enum QwtPolarItem::RttiValues

运行时类型信息

RttiValues 用于转换绘图项，而无需启用编译器的运行时类型信息。

枚举值
Rtti_PolarItem	Unspecific value, that can be used, when it doesn't matter
Rtti_PolarGrid	For QwtPolarGrid
Rtti_PolarMarker	For QwtPolarMarker
Rtti_PolarCurve	For QwtPolarCurve
Rtti_PolarSpectrogram	For QwtPolarSpectrogram
Rtti_PolarUserItem	Values >= Rtti_PolarUserItem are reserved for plot items not implemented in the QwtPolar library.

构造及析构函数说明

◆ QwtPolarItem()

QwtPolarItem::QwtPolarItem ( const QwtText & title = QwtText() )

explicit

Constructor

构造函数

◆ ~QwtPolarItem()

QwtPolarItem::~QwtPolarItem ( )

virtual

Destructor

析构函数

成员函数说明

◆ attach()

void QwtPolarItem::attach ( QwtPolarPlot * plot )

Attach the item to a plot

将项附加到绘图

◆ boundingInterval()

QwtInterval QwtPolarItem::boundingInterval ( int scaleId ) const

virtual

Get the bounding interval for a scale

获取刻度的边界区间

被 QwtPolarCurve, QwtPolarMarker , 以及 QwtPolarSpectrogram 重载.

◆ detach()

void QwtPolarItem::detach ( )

Detach the item from its plot

从关联的绘图分离项

◆ draw()

virtual void QwtPolarItem::draw	(	QPainter *	painter,
		const QwtScaleMap &	azimuthMap,
		const QwtScaleMap &	radialMap,
		const QPointF &	pole,
		double	radius,
		const QRectF &	canvasRect
	)		const

pure virtual

绘制项

参数

[in]	painter	画师
[in]	azimuthMap	将方位角值映射到与 0.0, M_2PI 相关的值
[in]	radialMap	将半径值映射到画师坐标
[in]	pole	画师坐标中极点的位置
[in]	radius	画师坐标中完整绘图区域的半径
[in]	canvasRect	画师坐标中画布的内容矩形

在 QwtPolarCurve, QwtPolarGrid, QwtPolarMarker , 以及 QwtPolarSpectrogram 内被实现.

◆ hide()

void QwtPolarItem::hide ( )

Hide the item

隐藏项

◆ isVisible()

bool QwtPolarItem::isVisible ( ) const

Get the visibility

检查项是否可见

◆ itemChanged()

void QwtPolarItem::itemChanged ( )

virtual

Update the item and trigger autoRefresh

更新图例并调用父绘图的 QwtPolarPlot::autoRefresh

◆ legendChanged()

void QwtPolarItem::legendChanged ( )

virtual

Update the legend

更新父绘图的图例

◆ legendData()

QList< QwtLegendData > QwtPolarItem::legendData ( ) const

virtual

Get the legend data

返回在图例上表示项所需的所有信息

◆ legendIcon()

QwtGraphic QwtPolarItem::legendIcon	(	int	index,
		const QSizeF &	size
	)		const

virtual

Get the legend icon

获取在图例上表示项的图标

被 QwtPolarCurve 重载.

◆ legendIconSize()

QSize QwtPolarItem::legendIconSize ( ) const

Get the legend icon size

获取图例图标大小

◆ marginHint()

int QwtPolarItem::marginHint ( ) const

virtual

Get the margin hint

获取边距提示

被 QwtPolarGrid 重载.

◆ plot()

QwtPolarPlot * QwtPolarItem::plot ( ) const

Get the attached plot

获取附加的绘图

◆ renderThreadCount()

uint QwtPolarItem::renderThreadCount ( ) const

Get the number of render threads

获取渲染线程数

◆ rtti()

int QwtPolarItem::rtti ( ) const

virtual

Get the runtime type information

获取所表示的特定类的运行时类型信息

被 QwtPolarCurve, QwtPolarGrid, QwtPolarMarker , 以及 QwtPolarSpectrogram 重载.

◆ setItemAttribute()

void QwtPolarItem::setItemAttribute	(	ItemAttribute	attribute,
		bool	on = `true`
	)

Set an item attribute

切换项属性

◆ setLegendIconSize()

void QwtPolarItem::setLegendIconSize ( const QSize & size )

Set the legend icon size

设置图例图标的大小

◆ setRenderHint()

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

Set a render hint

切换渲染提示

◆ setRenderThreadCount()

void QwtPolarItem::setRenderThreadCount ( uint numThreads )

Set the number of render threads

设置渲染线程数

◆ setTitle() [1/2]

void QwtPolarItem::setTitle ( const QString & title )

Set the title from a QString

设置新标题

◆ setTitle() [2/2]

void QwtPolarItem::setTitle ( const QwtText & title )

Set the title from a QwtText

设置新标题

◆ setVisible()

void QwtPolarItem::setVisible ( bool on )

virtual

Set the visibility

显示/隐藏项

◆ setZ()

void QwtPolarItem::setZ ( double z )

Set the z value

设置 z 值

◆ show()

void QwtPolarItem::show ( )

Show the item

显示项

◆ testItemAttribute()

bool QwtPolarItem::testItemAttribute ( ItemAttribute attribute ) const

Test an item attribute

测试项属性

◆ testRenderHint()

bool QwtPolarItem::testRenderHint ( RenderHint hint ) const

Test a render hint

测试渲染提示

◆ title()

const QwtText & QwtPolarItem::title ( ) const

Get the title

获取项的标题

◆ updateScaleDiv()

void QwtPolarItem::updateScaleDiv	(	const QwtScaleDiv &	azimuthScaleDiv,
		const QwtScaleDiv &	radialScaleDiv,
		const QwtInterval &	interval
	)

virtual

Update the scale division

更新项以适应轴刻度划分的变化

被 QwtPolarGrid 重载.

◆ z()

double QwtPolarItem::z ( ) const

Get the z value

获取 z 值

该类的文档由以下文件生成:

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

类

Public 类型

Public 成员函数

详细描述

成员枚举类型说明

◆ ItemAttribute

◆ RenderHint

◆ RttiValues

构造及析构函数说明

◆ QwtPolarItem()

◆ ~QwtPolarItem()

成员函数说明

◆ attach()

◆ boundingInterval()

◆ detach()

◆ draw()

◆ hide()

◆ isVisible()

◆ itemChanged()

◆ legendChanged()

◆ legendData()

◆ legendIcon()

◆ legendIconSize()

◆ marginHint()

◆ plot()

◆ renderThreadCount()

◆ rtti()

◆ setItemAttribute()

◆ setLegendIconSize()

◆ setRenderHint()

◆ setRenderThreadCount()

◆ setTitle() [1/2]

◆ setTitle() [2/2]

◆ setVisible()

◆ setZ()

◆ show()

◆ testItemAttribute()

◆ testRenderHint()

◆ title()

◆ updateScaleDiv()

◆ z()