在绘图画布内绘制图例的类更多...

#include <qwt_plot_legenditem.h>

类 QwtPlotLegendItem 继承关系图:

类
class	PrivateData

Public 类型
enum	BackgroundMode { LegendBackground , ItemBackground }
	背景模式更多...

Public 类型继承自 QwtPlotItem
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
	QwtPlotLegendItem ()
	Constructor

virtual	~QwtPlotLegendItem ()
	Destructor

virtual int	rtti () const override
	Get the runtime type information

void	setAlignmentInCanvas (Qt::Alignment)
	Set the alignment in canvas

Qt::Alignment	alignmentInCanvas () const
	Get the alignment in canvas

void	setOffsetInCanvas (Qt::Orientations, int numPixels)
	Set the offset in canvas

int	offsetInCanvas (Qt::Orientation) const
	Get the offset in canvas

void	setMaxColumns (uint)
	Set the maximum number of columns

uint	maxColumns () const
	Get the maximum number of columns

void	setMargin (int)
	Set the margin

int	margin () const
	Get the margin

void	setSpacing (int)
	Set the spacing

int	spacing () const
	Get the spacing

void	setItemMargin (int)
	Set the item margin

int	itemMargin () const
	Get the item margin

void	setItemSpacing (int)
	Set the item spacing

int	itemSpacing () const
	Get the item spacing

void	setFont (const QFont &)
	Set the font

QFont	font () const
	Get the font

void	setBorderRadius (double)
	Set the border radius

double	borderRadius () const
	Get the border radius

void	setBorderPen (const QPen &)
	Set the border pen

QPen	borderPen () const
	Get the border pen

void	setBackgroundBrush (const QBrush &)
	Set the background brush

QBrush	backgroundBrush () const
	Get the background brush

void	setBackgroundMode (BackgroundMode)
	Set the background mode

BackgroundMode	backgroundMode () const
	Get the background mode

void	setTextPen (const QPen &)
	Set the text pen

QPen	textPen () const
	Get the text pen

virtual void	draw (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect) const override
	Draw the legend item

void	clearLegend ()
	Clear the legend

virtual void	updateLegend (const QwtPlotItem *, const QList< QwtLegendData > &) override
	Update the legend

virtual QRect	geometry (const QRectF &canvasRect) const
	Get the geometry

virtual QSize	minimumSize (const QwtLegendData &) const
	Get the minimum size

virtual int	heightForWidth (const QwtLegendData &, int width) const
	Get the height for width

QList< const QwtPlotItem * >	plotItems () const
	Get the plot items

QList< QRect >	legendGeometries (const QwtPlotItem *) const
	Get the legend geometries

Public 成员函数继承自 QwtPlotItem
	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

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 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

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
virtual void	drawLegendData (QPainter , const QwtPlotItem , const QwtLegendData &, const QRectF &) const
	Draw the legend data

virtual void	drawBackground (QPainter *, const QRectF &rect) const
	Draw the background

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

详细描述

在绘图画布内绘制图例的类

成员枚举类型说明

◆ BackgroundMode

enum QwtPlotLegendItem::BackgroundMode

背景模式

枚举值
LegendBackground	The legend has a background
ItemBackground	Each item has a background

构造及析构函数说明

◆ QwtPlotLegendItem()

QwtPlotLegendItem::QwtPlotLegendItem ( )

explicit

Constructor

构造函数

◆ ~QwtPlotLegendItem()

QwtPlotLegendItem::~QwtPlotLegendItem ( )

virtual

Destructor

析构函数

成员函数说明

◆ alignmentInCanvas()

Qt::Alignment QwtPlotLegendItem::alignmentInCanvas ( ) const

Get the alignment in canvas

获取对齐标志

◆ backgroundBrush()

QBrush QwtPlotLegendItem::backgroundBrush ( ) const

Get the background brush

获取用于填充背景的画刷

◆ backgroundMode()

QwtPlotLegendItem::BackgroundMode QwtPlotLegendItem::backgroundMode ( ) const

Get the background mode

获取背景模式

◆ borderPen()

QPen QwtPlotLegendItem::borderPen ( ) const

Get the border pen

获取用于绘制边框的画笔

◆ borderRadius()

double QwtPlotLegendItem::borderRadius ( ) const

Get the border radius

获取边框半径

◆ clearLegend()

void QwtPlotLegendItem::clearLegend ( )

Clear the legend

从图例中移除所有项目

◆ draw()

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

overridevirtual

Draw the legend item

绘制图例

实现了 QwtPlotItem.

◆ drawBackground()

void QwtPlotLegendItem::drawBackground	(	QPainter *	painter,
		const QRectF &	rect
	)		const

protectedvirtual

Draw the background

Draw a rounded rect

参数

painter	Painter
rect	Bounding rectangle

参见: setBorderRadius(), setBorderPen(), setBackgroundBrush(), setBackgroundMode()

◆ drawLegendData()

void QwtPlotLegendItem::drawLegendData	(	QPainter *	painter,
		const QwtPlotItem *	plotItem,
		const QwtLegendData &	data,
		const QRectF &	rect
	)		const

protectedvirtual

Draw the legend data

Draw an entry on the legend

参数

painter	Qt Painter
plotItem	Plot item, represented by the entry
data	Attributes of the legend entry
rect	Bounding rectangle for the entry

◆ font()

QFont QwtPlotLegendItem::font ( ) const

Get the font

获取用于绘制文本标签的字体

◆ geometry()

QRect QwtPlotLegendItem::geometry ( const QRectF & canvasRect ) const

virtual

Get the geometry

计算图例在画布上的几何形状

◆ heightForWidth()

int QwtPlotLegendItem::heightForWidth	(	const QwtLegendData &	data,
		int	width
	)		const

virtual

Get the height for width

获取给定宽度的首选高度

◆ itemMargin()

int QwtPlotLegendItem::itemMargin ( ) const

Get the item margin

获取每个项目周围的边距

◆ itemSpacing()

int QwtPlotLegendItem::itemSpacing ( ) const

Get the item spacing

获取每个项目内部的间距

◆ legendGeometries()

QList< QRect > QwtPlotLegendItem::legendGeometries ( const QwtPlotItem * plotItem ) const

Get the legend geometries

获取绘图项的项目的几何形状

◆ margin()

int QwtPlotLegendItem::margin ( ) const

Get the margin

获取图例项周围的边距

◆ maxColumns()

uint QwtPlotLegendItem::maxColumns ( ) const

Get the maximum number of columns

获取最大列数

◆ minimumSize()

QSize QwtPlotLegendItem::minimumSize ( const QwtLegendData & data ) const

virtual

Get the minimum size

获取显示条目所需的最小尺寸提示

◆ offsetInCanvas()

int QwtPlotLegendItem::offsetInCanvas ( Qt::Orientation orientation ) const

Get the offset in canvas

获取图例与画布边缘之间的距离

◆ plotItems()

QList< const QwtPlotItem * > QwtPlotLegendItem::plotItems ( ) const

Get the plot items

获取图例上有条目的所有绘图项

◆ rtti()

int QwtPlotLegendItem::rtti ( ) const

overridevirtual

Get the runtime type information

获取运行时类型信息

重载 QwtPlotItem .

◆ setAlignmentInCanvas()

void QwtPlotLegendItem::setAlignmentInCanvas ( Qt::Alignment alignment )

Set the alignment in canvas

设置图例在画布内的对齐方式

◆ setBackgroundBrush()

void QwtPlotLegendItem::setBackgroundBrush ( const QBrush & brush )

Set the background brush

设置背景画刷

◆ setBackgroundMode()

void QwtPlotLegendItem::setBackgroundMode ( BackgroundMode mode )

Set the background mode

设置背景模式

◆ setBorderPen()

void QwtPlotLegendItem::setBorderPen ( const QPen & pen )

Set the border pen

设置用于绘制边框的画笔

◆ setBorderRadius()

void QwtPlotLegendItem::setBorderRadius ( double radius )

Set the border radius

设置边框半径

◆ setFont()

void QwtPlotLegendItem::setFont ( const QFont & font )

Set the font

更改用于绘制文本标签的字体

◆ setItemMargin()

void QwtPlotLegendItem::setItemMargin ( int margin )

Set the item margin

设置每个项目周围的边距

◆ setItemSpacing()

void QwtPlotLegendItem::setItemSpacing ( int spacing )

Set the item spacing

设置每个项目内部的间距

◆ setMargin()

void QwtPlotLegendItem::setMargin ( int margin )

Set the margin

设置图例项周围的边距

◆ setMaxColumns()

void QwtPlotLegendItem::setMaxColumns ( uint maxColumns )

Set the maximum number of columns

限制列数

◆ setOffsetInCanvas()

void QwtPlotLegendItem::setOffsetInCanvas	(	Qt::Orientations	orientations,
		int	numPixels
	)

Set the offset in canvas

设置图例与画布边缘之间的距离

◆ setSpacing()

void QwtPlotLegendItem::setSpacing ( int spacing )

Set the spacing

设置图例项之间的间距

◆ setTextPen()

void QwtPlotLegendItem::setTextPen ( const QPen & pen )

Set the text pen

设置用于绘制文本标签的画笔

◆ spacing()

int QwtPlotLegendItem::spacing ( ) const

Get the spacing

获取图例项之间的间距

◆ textPen()

QPen QwtPlotLegendItem::textPen ( ) const

Get the text pen

获取用于绘制文本标签的画笔

◆ updateLegend()

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

overridevirtual

Update the legend

根据绘图项的修改更新图例项

重载 QwtPlotItem .

该类的文档由以下文件生成:

/home/runner/work/QWT/QWT/src/plot/qwt_plot_legenditem.h
/home/runner/work/QWT/QWT/src/plot/qwt_plot_legenditem.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

◆ BackgroundMode

构造及析构函数说明

◆ QwtPlotLegendItem()

◆ ~QwtPlotLegendItem()

成员函数说明

◆ alignmentInCanvas()

◆ backgroundBrush()

◆ backgroundMode()

◆ borderPen()

◆ borderRadius()

◆ clearLegend()

◆ draw()

◆ drawBackground()

◆ drawLegendData()

◆ font()

◆ geometry()

◆ heightForWidth()

◆ itemMargin()

◆ itemSpacing()

◆ legendGeometries()

◆ margin()

◆ maxColumns()

◆ minimumSize()

◆ offsetInCanvas()

◆ plotItems()

◆ rtti()

◆ setAlignmentInCanvas()

◆ setBackgroundBrush()

◆ setBackgroundMode()

◆ setBorderPen()

◆ setBorderRadius()

◆ setFont()

◆ setItemMargin()

◆ setItemSpacing()

◆ setMargin()

◆ setMaxColumns()

◆ setOffsetInCanvas()

◆ setSpacing()

◆ setTextPen()

◆ spacing()

◆ textPen()

◆ updateLegend()