A class for drawing markers 更多...

#include <qwt_plot_marker.h>

类 QwtPlotMarker 继承关系图:

类
class	PrivateData

Public 类型
enum	LineStyle { NoLine , HLine , VLine , Cross }
	Line styles 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 }
	Runtime type information 更多...

enum	ItemAttribute { Legend = 0x01 , AutoScale = 0x02 , Margins = 0x04 }
	Plot Item Attributes 更多...

enum	ItemInterest { ScaleInterest = 0x01 , LegendInterest = 0x02 }
	Plot Item Interests 更多...

enum	RenderHint { RenderAntialiased = 0x1 }
	Render hints 更多...

Public 成员函数
	QwtPlotMarker ()
	Constructor

	QwtPlotMarker (const QString &title)
	Constructor with title

	QwtPlotMarker (const QwtText &title)
	Constructor with QwtText title

	~QwtPlotMarker () override
	Destructor

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

double	xValue () const
	Get the x-value

double	yValue () const
	Get the y-value

QPointF	value () const
	Get the value as a point

void	setXValue (double)
	Set the x-value

void	setYValue (double)
	Set the y-value

void	setValue (double, double)
	Set the value

void	setValue (const QPointF &)
	Set the value from a point

void	setLineStyle (LineStyle)
	Set the line style

LineStyle	lineStyle () const
	Get the line style

void	setLinePen (const QColor &, qreal width=0.0, Qt::PenStyle=Qt::SolidLine)
	Set the line pen

void	setLinePen (const QPen &)
	Set the line pen

const QPen &	linePen () const
	Get the line pen

void	setSymbol (const QwtSymbol *)
	Set the symbol

const QwtSymbol *	symbol () const
	Get the symbol

void	setLabel (const QwtText &)
	Set the label

QwtText	label () const
	Get the label

void	setLabelAlignment (Qt::Alignment)
	Set the label alignment

Qt::Alignment	labelAlignment () const
	Get the label alignment

void	setLabelOrientation (Qt::Orientation)
	Set the label orientation

Qt::Orientation	labelOrientation () const
	Get the label orientation

void	setSpacing (int)
	Set the spacing

int	spacing () const
	Get the spacing

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

virtual QRectF	boundingRect () const override
	Get the bounding rectangle

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

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

virtual 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 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

Protected 成员函数
virtual void	drawLines (QPainter *, const QRectF &, const QPointF &) const
	Draw the lines

virtual void	drawSymbol (QPainter *, const QRectF &, const QPointF &) const
	Draw the symbol

virtual void	drawLabel (QPainter *, const QRectF &, const QPointF &) const
	Draw the label

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

详细描述

A class for drawing markers

A marker can be a horizontal line, a vertical line, a symbol, a label or any combination of them, which can be drawn around a center point inside a bounding rectangle.

The setSymbol() member assigns a symbol to the marker. The symbol is drawn at the specified point.

With setLabel(), a label can be assigned to the marker. The setLabelAlignment() member specifies where the label is drawn. All the Align*-constants in Qt::AlignmentFlags (see Qt documentation) are valid. The interpretation of the alignment depends on the marker's line style. The alignment refers to the center point of the marker, which means, for example, that the label would be printed left above the center point if the alignment was set to Qt::AlignLeft | Qt::AlignTop.

注解: QwtPlotTextLabel is intended to align a text label according to the geometry of canvas ( unrelated to plot coordinates )

成员枚举类型说明

◆ LineStyle

enum QwtPlotMarker::LineStyle

Line styles

参见: setLineStyle(), lineStyle()

枚举值
NoLine	No line
HLine	A horizontal line
VLine	A vertical line
Cross	A crosshair

构造及析构函数说明

◆ QwtPlotMarker()

QwtPlotMarker::QwtPlotMarker ( )

explicit

Constructor

Sets alignment to Qt::AlignCenter, and style to QwtPlotMarker::NoLine

Constructor with QString title

Sets alignment to Qt::AlignCenter, and style to QwtPlotMarker::NoLine

参数

[in] title Title of the marker

Constructor with QwtText title

Sets alignment to Qt::AlignCenter, and style to QwtPlotMarker::NoLine

参数

[in] title Title of the marker

Destructor

成员函数说明

◆ boundingRect()

QRectF QwtPlotMarker::boundingRect ( ) const

overridevirtual

Get the bounding rectangle

返回: Bounding rectangle

width/height of -1 does not affect the autoscale calculation

重载 QwtPlotItem .

◆ draw()

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

overridevirtual

Draw the marker

参数

[in]	painter	Painter
[in]	xMap	X Scale Map
[in]	yMap	Y Scale Map
[in]	canvasRect	Contents rectangle of the canvas in painter coordinates

实现了 QwtPlotItem.

◆ drawLabel()

void QwtPlotMarker::drawLabel	(	QPainter *	painter,
		const QRectF &	canvasRect,
		const QPointF &	pos
	)		const

protectedvirtual

Draw the label

Align and draw the text label of the marker

参数

painter	Painter
canvasRect	Contents rectangle of the canvas in painter coordinates
pos	Position of the marker, translated into widget coordinates

参见: drawLabel(), drawSymbol()

◆ drawLines()

void QwtPlotMarker::drawLines	(	QPainter *	painter,
		const QRectF &	canvasRect,
		const QPointF &	pos
	)		const

protectedvirtual

Draw the lines

Draw the lines marker

参数

painter	Painter
canvasRect	Contents rectangle of the canvas in painter coordinates
pos	Position of the marker, translated into widget coordinates

参见: drawLabel(), drawSymbol()

◆ drawSymbol()

void QwtPlotMarker::drawSymbol	(	QPainter *	painter,
		const QRectF &	canvasRect,
		const QPointF &	pos
	)		const

protectedvirtual

Draw the symbol

Draw the symbol of the marker

参数

painter	Painter
canvasRect	Contents rectangle of the canvas in painter coordinates
pos	Position of the marker, translated into widget coordinates

参见: drawLabel(), QwtSymbol::drawSymbol()

◆ label()

QwtText QwtPlotMarker::label ( ) const

Get the label

返回: Label text

参见: setLabel()

◆ labelAlignment()

Qt::Alignment QwtPlotMarker::labelAlignment ( ) const

Get the label alignment

返回: Label alignment

参见: setLabelAlignment(), setLabelOrientation()

◆ labelOrientation()

Qt::Orientation QwtPlotMarker::labelOrientation ( ) const

Get the label orientation

返回: Label orientation

参见: setLabelOrientation(), labelAlignment()

◆ legendIcon()

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

overridevirtual

Get the legend icon

Get the icon representing the marker on the legend

参数

[in]	index	Index of the legend entry (usually there is only one)
[in]	size	Icon size

返回: Icon representing the marker on the legend

参见: setLegendIconSize(), legendData()

重载 QwtPlotItem .

◆ linePen()

const QPen & QwtPlotMarker::linePen ( ) const

Get the line pen

返回: Line pen

参见: setLinePen()

◆ lineStyle()

QwtPlotMarker::LineStyle QwtPlotMarker::lineStyle ( ) const

Get the line style

返回: Line style

参见: setLineStyle()

◆ rtti()

int QwtPlotMarker::rtti ( ) const

overridevirtual

Get the runtime type information

返回: QwtPlotItem::Rtti_PlotMarker

重载 QwtPlotItem .

◆ setLabel()

void QwtPlotMarker::setLabel ( const QwtText & label )

Set the label

参数

[in] label Label text

参见: label()

◆ setLabelAlignment()

void QwtPlotMarker::setLabelAlignment ( Qt::Alignment align )

Set the label alignment

Set the alignment of the label

In case of QwtPlotMarker::HLine the alignment is relative to the y position of the marker, but the horizontal flags correspond to the canvas rectangle. In case of QwtPlotMarker::VLine the alignment is relative to the x position of the marker, but the vertical flags correspond to the canvas rectangle. In all other styles the alignment is relative to the marker's position.

参数

[in] align Alignment

参见: labelAlignment(), labelOrientation()

◆ setLabelOrientation()

void QwtPlotMarker::setLabelOrientation ( Qt::Orientation orientation )

Set the label orientation

Set the orientation of the label

When orientation is Qt::Vertical the label is rotated by 90.0 degrees (from bottom to top).

参数

[in] orientation Orientation of the label

参见: labelOrientation(), setLabelAlignment()

◆ setLinePen() [1/2]

void QwtPlotMarker::setLinePen	(	const QColor &	color,
		qreal	width = `0.0`,
		Qt::PenStyle	style = `Qt::SolidLine`
	)

Set the line pen

Build and assign a line pen

In Qt5 the default pen width is 1.0 (0.0 in Qt4) which makes it non cosmetic (see QPen::isCosmetic()). This method has been introduced to hide this incompatibility.

参数

[in]	color	Pen color
[in]	width	Pen width
[in]	style	Pen style

参见: pen(), brush()

◆ setLinePen() [2/2]

void QwtPlotMarker::setLinePen ( const QPen & pen )

Set the line pen

Specify a pen for the line

参数

[in] pen New pen

参见: linePen()

◆ setLineStyle()

void QwtPlotMarker::setLineStyle ( LineStyle style )

Set the line style

参数

[in] style Line style

参见: lineStyle()

◆ setSpacing()

void QwtPlotMarker::setSpacing ( int spacing )

Set the spacing

When the label is not centered on the marker position, the spacing is the distance between the position and the label.

参数

[in] spacing Spacing

参见: spacing(), setLabelAlignment()

◆ setSymbol()

void QwtPlotMarker::setSymbol ( const QwtSymbol * symbol )

Set the symbol

Assign a symbol

参数

[in] symbol New symbol

参见: symbol()

◆ setValue() [1/2]

void QwtPlotMarker::setValue ( const QPointF & pos )

Set the value from a point

参数

[in] pos Position as QPointF

◆ setValue() [2/2]

void QwtPlotMarker::setValue	(	double	x,
		double	y
	)

Set the value

参数

[in]	x	X value
[in]	y	Y value

◆ setXValue()

void QwtPlotMarker::setXValue ( double x )

Set the x-value

参数

[in] x X value

◆ setYValue()

void QwtPlotMarker::setYValue ( double y )

Set the y-value

参数

[in] y Y value

◆ spacing()

int QwtPlotMarker::spacing ( ) const

Get the spacing

返回: Spacing

参见: setSpacing()

◆ symbol()

const QwtSymbol * QwtPlotMarker::symbol ( ) const

Get the symbol

返回: The symbol

参见: setSymbol(), QwtSymbol

◆ value()

QPointF QwtPlotMarker::value ( ) const

Get the value as a point

返回: Value as QPointF

◆ xValue()

double QwtPlotMarker::xValue ( ) const

Get the x-value

返回: X value

◆ yValue()

double QwtPlotMarker::yValue ( ) const

Get the y-value

返回: Y value

该类的文档由以下文件生成:

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

◆ LineStyle

构造及析构函数说明

◆ QwtPlotMarker()

成员函数说明

◆ boundingRect()

◆ draw()

◆ drawLabel()

◆ drawLines()

◆ drawSymbol()

◆ label()

◆ labelAlignment()

◆ labelOrientation()

◆ legendIcon()

◆ linePen()

◆ lineStyle()

◆ rtti()

◆ setLabel()

◆ setLabelAlignment()

◆ setLabelOrientation()

◆ setLinePen() [1/2]

◆ setLinePen() [2/2]

◆ setLineStyle()

◆ setSpacing()

◆ setSymbol()

◆ setValue() [1/2]

◆ setValue() [2/2]

◆ setXValue()

◆ setYValue()

◆ spacing()

◆ symbol()

◆ value()

◆ xValue()

◆ yValue()