Base class for plot items representing a series of samples 更多...

#include <qwt_plot_seriesitem.h>

类 QwtPlotSeriesItem 继承关系图:

类
class	PrivateData

Public 成员函数
	QwtPlotSeriesItem (const QString &title=QString())

	QwtPlotSeriesItem (const QwtText &title)
	Constructor

void	setOrientation (Qt::Orientation)
	Set the orientation of the item

Qt::Orientation	orientation () const
	Get the orientation of the plot item

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

virtual void	drawSeries (QPainter *painter, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const =0
	Draw a subset of the samples

virtual QRectF	boundingRect () const override
	Get the bounding rectangle

virtual void	updateScaleDiv (const QwtScaleDiv &, const QwtScaleDiv &) override
	Update the scale divisions

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

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	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	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
virtual void	dataChanged () override
	dataChanged() indicates, that the series has been changed.

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

Protected 成员函数继承自 QwtAbstractSeriesStore
virtual void	setRectOfInterest (const QRectF &)=0
	Set a the "rectangle of interest" for the stored series

virtual QRectF	dataRect () const =0

virtual size_t	dataSize () const =0

额外继承的成员函数
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...

详细描述

Base class for plot items representing a series of samples

QwtPlotSeriesItem is the base class for plot items that represent a series of samples, such as curves, bars, and other data visualization elements.

构造及析构函数说明

◆ QwtPlotSeriesItem()

QwtPlotSeriesItem::QwtPlotSeriesItem ( const QwtText & title )

explicit

Constructor

参数

[in] title Title of the curve

Constructor

参数

[in] title Title of the curve

Destructor

成员函数说明

◆ boundingRect()

QRectF QwtPlotSeriesItem::boundingRect ( ) const

overridevirtual

Get the bounding rectangle

返回: Bounding rectangle

重载 QwtPlotItem .

被 QwtPlotBarChart, QwtPlotBoxChart, QwtPlotHistogram, QwtPlotIntervalCurve, QwtPlotMultiBarChart, QwtPlotTradingCurve , 以及 QwtPlotVectorField 重载.

◆ dataChanged()

void QwtPlotSeriesItem::dataChanged ( )

overrideprotectedvirtual

dataChanged() indicates, that the series has been changed.

实现了 QwtAbstractSeriesStore.

被 QwtPlotVectorField 重载.

◆ draw()

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

overridevirtual

Draw the complete series

参数

[in]	painter	Painter
[in]	xMap	Maps x-values into pixel coordinates.
[in]	yMap	Maps y-values into pixel coordinates.
[in]	canvasRect	Contents rectangle of the canvas

实现了 QwtPlotItem.

◆ drawSeries()

virtual void QwtPlotSeriesItem::drawSeries	(	QPainter *	painter,
		const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRectF &	canvasRect,
		int	from,
		int	to
	)		const

pure virtual

Draw a subset of the samples

参数

painter	Painter
xMap	Maps x-values into pixel coordinates.
yMap	Maps y-values into pixel coordinates.
canvasRect	Contents rectangle of the canvas
from	Index of the first point to be painted
to	Index of the last point to be painted. If to < 0 the curve will be painted to its last point.

在 QwtPlotBarChart, QwtPlotBoxChart, QwtPlotCurve, QwtPlotHistogram, QwtPlotIntervalCurve, QwtPlotMultiBarChart, QwtPlotSpectroCurve, QwtPlotTradingCurve , 以及 QwtPlotVectorField 内被实现.

◆ orientation()

Qt::Orientation QwtPlotSeriesItem::orientation ( ) const

Get the orientation of the plot item

返回: Orientation of the plot item

参见: setOrientation()

◆ setOrientation()

void QwtPlotSeriesItem::setOrientation ( Qt::Orientation orientation )

Set the orientation of the item

The orientation() might be used in specific way by a plot item. F.e. a QwtPlotCurve uses it to identify how to display the curve in QwtPlotCurve::Steps or QwtPlotCurve::Sticks style.

参数

[in] orientation Orientation

参见: orientation()

◆ updateScaleDiv()

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

overridevirtual

Update the scale divisions

参数

[in]	xScaleDiv	X scale division
[in]	yScaleDiv	Y scale division

重载 QwtPlotItem .

该类的文档由以下文件生成:

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

类

Public 成员函数

Protected 成员函数

额外继承的成员函数

详细描述

构造及析构函数说明

◆ QwtPlotSeriesItem()

成员函数说明

◆ boundingRect()

◆ dataChanged()

◆ draw()

◆ drawSeries()

◆ orientation()

◆ setOrientation()

◆ updateScaleDiv()