绘图画布上项目的基类更多...

#include <qwt_plot_item.h>

类 QwtPlotItem 继承关系图:

类
class	PrivateData

Public 类型
enum	RttiValues { Rtti_PlotItem = 0 , Rtti_PlotGrid , Rtti_PlotScale , Rtti_PlotLegend , Rtti_PlotMarker , Rtti_PlotCurve , Rtti_PlotSpectroCurve , Rtti_PlotIntervalCurve , Rtti_PlotHistogram , Rtti_PlotSpectrogram , Rtti_PlotGraphic , Rtti_PlotTradingCurve , Rtti_PlotBarChart , Rtti_PlotMultiBarChart , Rtti_PlotShape , Rtti_PlotTextLabel , Rtti_PlotZone , Rtti_PlotVectorField , Rtti_PlotArrowMarker , Rtti_PlotBoxChart , Rtti_PlotUserItem = 1000 }
	运行时类型信息更多...

enum	ItemAttribute { Legend = 0x01 , AutoScale = 0x02 , Margins = 0x04 }
	绘图项属性更多...

enum	ItemInterest { ScaleInterest = 0x01 , LegendInterest = 0x02 }
	绘图项关注的事件类型更多...

enum	RenderHint { RenderAntialiased = 0x1 }
	渲染提示更多...

Public 成员函数
	QwtPlotItem ()
	Default constructor

	QwtPlotItem (const QString &title)
	Constructor with title as QString

	QwtPlotItem (const QwtText &title)
	Constructor with title as QwtText

virtual	~QwtPlotItem ()
	Destructor

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

void	detach ()
	Detach the item from the plot

QwtPlot *	plot () const
	Get the plot the item is attached to

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

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

const QwtText &	title () const
	Get the title

virtual int	rtti () const
	Runtime type information

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

bool	testItemAttribute (ItemAttribute) const
	Test an item attribute

void	setItemInterest (ItemInterest, bool on=true)
	Set an item interest

bool	testItemInterest (ItemInterest) const
	Test an item interest

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

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

QSize	legendIconSize () const
	Get the legend icon size

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
	Check if the item is visible

void	setAxes (QwtAxisId xAxis, QwtAxisId yAxis)
	Set both axes

void	setXAxis (QwtAxisId)
	Set the x-axis

QwtAxisId	xAxis () const
	Get the x-axis

void	setYAxis (QwtAxisId)
	Set the y-axis

QwtAxisId	yAxis () const
	Get the y-axis

virtual void	itemChanged ()
	Notify the plot that the item has changed

virtual void	legendChanged ()
	Notify the item that the legend has changed

virtual void	draw (QPainter *painter, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect) const =0
	绘制项目

virtual QRectF	boundingRect () const
	Get the bounding rectangle

virtual void	getCanvasMarginHint (const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, double &left, double &top, double &right, double &bottom) const
	Get margin hints for the canvas

virtual void	updateScaleDiv (const QwtScaleDiv &, const QwtScaleDiv &)
	Update the item with new scale divisions

virtual void	updateLegend (const QwtPlotItem *, const QList< QwtLegendData > &)
	Update the item with changes of the legend

QRectF	scaleRect (const QwtScaleMap &, const QwtScaleMap &) const
	Calculate the scale rectangle

QRectF	paintRect (const QwtScaleMap &, const QwtScaleMap &) const
	Calculate the paint rectangle

virtual QList< QwtLegendData >	legendData () const
	Return legend data

virtual QwtGraphic	legendIcon (int index, const QSizeF &) const
	Return a legend icon

Protected 成员函数
QwtGraphic	defaultIcon (const QBrush &, const QSizeF &) const
	Create a default icon

详细描述

绘图画布上项目的基类

成员枚举类型说明

◆ ItemAttribute

enum QwtPlotItem::ItemAttribute

绘图项属性

枚举值

Legend

The item is represented on the legend.

AutoScale

The boundingRect() of the item is included in the autoscaling calculation as long as its width or height is >= 0.0.

Margins

The item needs extra space to display something outside its bounding rectangle.

参见: getCanvasMarginHint()

◆ ItemInterest

enum QwtPlotItem::ItemInterest

绘图项关注的事件类型

枚举值

ScaleInterest

该绘图项关注刻度的更新

参见: updateScaleDiv()

LegendInterest

该绘图项关注图例的更新（其他项的图例）此标志适用于那些希望实现图例以显示其他绘图项条目的绘图项。

注解: 若绘图项自身希望在图例中显示，请启用 QwtPlotItem::Legend 标志。

参见: updateLegend()

◆ RenderHint

enum QwtPlotItem::RenderHint

渲染提示

枚举值
RenderAntialiased	Enable antialiasing

◆ RttiValues

enum QwtPlotItem::RttiValues

运行时类型信息

枚举值
Rtti_PlotItem	Unspecific value, that can be used, when it doesn't matter
Rtti_PlotGrid	For QwtPlotGrid
Rtti_PlotScale	For QwtPlotScaleItem
Rtti_PlotLegend	For QwtPlotLegendItem
Rtti_PlotMarker	For QwtPlotMarker
Rtti_PlotCurve	For QwtPlotCurve
Rtti_PlotSpectroCurve	For QwtPlotSpectroCurve
Rtti_PlotIntervalCurve	For QwtPlotIntervalCurve
Rtti_PlotHistogram	For QwtPlotHistogram
Rtti_PlotSpectrogram	For QwtPlotSpectrogram
Rtti_PlotGraphic	For QwtPlotGraphicItem, QwtPlotSvgItem
Rtti_PlotTradingCurve	For QwtPlotTradingCurve
Rtti_PlotBarChart	For QwtPlotBarChart
Rtti_PlotMultiBarChart	For QwtPlotMultiBarChart
Rtti_PlotShape	For QwtPlotShapeItem
Rtti_PlotTextLabel	For QwtPlotTextLabel
Rtti_PlotZone	For QwtPlotZoneItem
Rtti_PlotVectorField	For QwtPlotVectorField
Rtti_PlotArrowMarker	For QwtPlotArrowMarker
Rtti_PlotBoxChart	Boxplot chart item
Rtti_PlotUserItem	Values >= Rtti_PlotUserItem are reserved for plot items not implemented in the Qwt library.

构造及析构函数说明

◆ QwtPlotItem() [1/3]

QwtPlotItem::QwtPlotItem ( )

explicit

Default constructor

默认构造函数

◆ QwtPlotItem() [2/3]

QwtPlotItem::QwtPlotItem ( const QString & title )

explicit

Constructor with title as QString

使用 QString 标题的构造函数

◆ QwtPlotItem() [3/3]

QwtPlotItem::QwtPlotItem ( const QwtText & title )

explicit

Constructor with title as QwtText

使用 QwtText 标题的构造函数

◆ ~QwtPlotItem()

QwtPlotItem::~QwtPlotItem ( )

virtual

Destructor

析构函数

成员函数说明

◆ attach()

void QwtPlotItem::attach ( QwtPlot * plot )

Attach the item to a plot

将项目附加到绘图

◆ boundingRect()

QRectF QwtPlotItem::boundingRect ( ) const

virtual

Get the bounding rectangle

获取边界矩形

被 QwtPlotArrowMarker, QwtPlotBarChart, QwtPlotBoxChart, QwtPlotGraphicItem, QwtPlotHistogram, QwtPlotIntervalCurve, QwtPlotMarker, QwtPlotMultiBarChart, QwtPlotRasterItem, QwtPlotSeriesItem, QwtPlotShapeItem, QwtPlotTradingCurve, QwtPlotVectorField , 以及 QwtPlotZoneItem 重载.

◆ defaultIcon()

QwtGraphic QwtPlotItem::defaultIcon	(	const QBrush &	brush,
		const QSizeF &	size
	)		const

protected

Create a default icon

Return a default icon from a brush

◆ detach()

void QwtPlotItem::detach ( )

Detach the item from the plot

将项目从绘图分离

◆ draw()

virtual void QwtPlotItem::draw	(	QPainter *	painter,
		const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRectF &	canvasRect
	)		const

pure virtual

绘制项目

在 QwtPlotTextLabel, QwtPlotZoneItem, QwtPlotMarker, QwtPlotGraphicItem, QwtPlotGrid, QwtPlotLegendItem, QwtPlotRasterItem, QwtPlotScaleItem, QwtPlotSeriesItem, QwtPlotShapeItem, QwtPlotSpectrogram , 以及 QwtPlotArrowMarker 内被实现.

◆ getCanvasMarginHint()

void QwtPlotItem::getCanvasMarginHint	(	const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRectF &	canvasRect,
		double &	left,
		double &	top,
		double &	right,
		double &	bottom
	)		const

virtual

Get margin hints for the canvas

计算画布边距提示

被 QwtPlotAbstractBarChart 重载.

◆ hide()

void QwtPlotItem::hide ( )

Hide the item

隐藏项目

◆ isVisible()

bool QwtPlotItem::isVisible ( ) const

Check if the item is visible

检查项目是否可见

◆ itemChanged()

void QwtPlotItem::itemChanged ( )

virtual

Notify the plot that the item has changed

通知绘图项目已更改

◆ legendChanged()

void QwtPlotItem::legendChanged ( )

virtual

Notify the item that the legend has changed

通知图例已更改

◆ legendData()

QList< QwtLegendData > QwtPlotItem::legendData ( ) const

virtual

Return legend data

返回在图例中表示项目所需的所有信息

被 QwtPlotBarChart , 以及 QwtPlotMultiBarChart 重载.

◆ legendIcon()

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

virtual

Return a legend icon

获取表示项目的图例图标

被 QwtPlotBarChart, QwtPlotBoxChart, QwtPlotCurve, QwtPlotHistogram, QwtPlotIntervalCurve, QwtPlotMarker, QwtPlotMultiBarChart, QwtPlotShapeItem, QwtPlotTradingCurve, QwtPlotVectorField , 以及 QwtPlotArrowMarker 重载.

◆ legendIconSize()

QSize QwtPlotItem::legendIconSize ( ) const

Get the legend icon size

获取图例图标大小

◆ paintRect()

QRectF QwtPlotItem::paintRect	(	const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap
	)		const

Calculate the paint rectangle

计算 2 个映射的边界绘制矩形

◆ plot()

QwtPlot * QwtPlotItem::plot ( ) const

Get the plot the item is attached to

获取项目附加的绘图

◆ renderThreadCount()

uint QwtPlotItem::renderThreadCount ( ) const

Get the number of render threads

获取渲染线程数

◆ rtti()

int QwtPlotItem::rtti ( ) const

virtual

Runtime type information

获取运行时类型信息

被 QwtPlotArrowMarker, QwtPlotBarChart, QwtPlotBoxChart, QwtPlotCurve, QwtPlotGraphicItem, QwtPlotGrid, QwtPlotHistogram, QwtPlotIntervalCurve, QwtPlotLegendItem, QwtPlotMarker, QwtPlotMultiBarChart, QwtPlotScaleItem, QwtPlotShapeItem, QwtPlotSpectroCurve, QwtPlotSpectrogram, QwtPlotTextLabel, QwtPlotTradingCurve, QwtPlotVectorField , 以及 QwtPlotZoneItem 重载.

◆ scaleRect()

QRectF QwtPlotItem::scaleRect	(	const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap
	)		const

Calculate the scale rectangle

计算 2 个映射的边界刻度矩形

◆ setAxes()

void QwtPlotItem::setAxes	(	QwtAxisId	xAxisId,
		QwtAxisId	yAxisId
	)

Set both axes

设置 X 轴和 Y 轴

◆ setItemAttribute()

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

Set an item attribute

设置项目属性

◆ setItemInterest()

void QwtPlotItem::setItemInterest	(	ItemInterest	interest,
		bool	on = `true`
	)

Set an item interest

设置项目关注事件

◆ setLegendIconSize()

void QwtPlotItem::setLegendIconSize ( const QSize & size )

Set the legend icon size

设置图例图标大小

◆ setRenderHint()

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

Set a render hint

设置渲染提示

◆ setRenderThreadCount()

void QwtPlotItem::setRenderThreadCount ( uint numThreads )

Set the number of render threads

设置渲染线程数

◆ setTitle() [1/2]

void QwtPlotItem::setTitle ( const QString & title )

Set the title using a QString

使用 QString 设置标题

◆ setTitle() [2/2]

void QwtPlotItem::setTitle ( const QwtText & title )

Set the title using a QwtText

使用 QwtText 设置标题

◆ setVisible()

void QwtPlotItem::setVisible ( bool on )

virtual

Set the visibility

设置项目的可见性

◆ setXAxis()

void QwtPlotItem::setXAxis ( QwtAxisId axisId )

Set the x-axis

设置 X 轴

◆ setYAxis()

void QwtPlotItem::setYAxis ( QwtAxisId axisId )

Set the y-axis

设置 Y 轴

◆ setZ()

void QwtPlotItem::setZ ( double z )

Set the z-value

设置 z 值

◆ show()

void QwtPlotItem::show ( )

Show the item

显示项目

◆ testItemAttribute()

bool QwtPlotItem::testItemAttribute ( ItemAttribute attribute ) const

Test an item attribute

测试项目属性

◆ testItemInterest()

bool QwtPlotItem::testItemInterest ( ItemInterest interest ) const

Test an item interest

测试项目关注事件

◆ testRenderHint()

bool QwtPlotItem::testRenderHint ( RenderHint hint ) const

Test a render hint

测试渲染提示

◆ title()

const QwtText & QwtPlotItem::title ( ) const

Get the title

获取项目的标题

◆ updateLegend()

void QwtPlotItem::updateLegend	(	const QwtPlotItem *	item,
		const QList< QwtLegendData > &	data
	)

virtual

Update the item with changes of the legend

更新项目以响应图例信息的变化

被 QwtPlotLegendItem 重载.

◆ updateScaleDiv()

void QwtPlotItem::updateScaleDiv	(	const QwtScaleDiv &	xScaleDiv,
		const QwtScaleDiv &	yScaleDiv
	)

virtual

Update the item with new scale divisions

更新项目以响应坐标轴刻度划分的变化

被 QwtPlotScaleItem, QwtPlotSeriesItem , 以及 QwtPlotGrid 重载.

◆ xAxis()

QwtAxisId QwtPlotItem::xAxis ( ) const

Get the x-axis

获取 X 轴

◆ yAxis()

QwtAxisId QwtPlotItem::yAxis ( ) const

Get the y-axis

获取 Y 轴

◆ z()

double QwtPlotItem::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_plot_item.h
/home/runner/work/QWT/QWT/src/plot/qwt_plot_item.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

◆ ItemAttribute

◆ ItemInterest

◆ RenderHint

◆ RttiValues

构造及析构函数说明

◆ QwtPlotItem() [1/3]

◆ QwtPlotItem() [2/3]

◆ QwtPlotItem() [3/3]

◆ ~QwtPlotItem()

成员函数说明

◆ attach()

◆ boundingRect()

◆ defaultIcon()

◆ detach()

◆ draw()

◆ getCanvasMarginHint()

◆ hide()

◆ isVisible()

◆ itemChanged()

◆ legendChanged()

◆ legendData()

◆ legendIcon()

◆ legendIconSize()

◆ paintRect()

◆ plot()

◆ renderThreadCount()

◆ rtti()

◆ scaleRect()

◆ setAxes()

◆ setItemAttribute()

◆ setItemInterest()

◆ setLegendIconSize()

◆ setRenderHint()

◆ setRenderThreadCount()

◆ setTitle() [1/2]

◆ setTitle() [2/2]

◆ setVisible()

◆ setXAxis()

◆ setYAxis()

◆ setZ()

◆ show()

◆ testItemAttribute()

◆ testItemInterest()

◆ testRenderHint()

◆ title()

◆ updateLegend()

◆ updateScaleDiv()

◆ xAxis()

◆ yAxis()

◆ z()