QwtPlotIntervalCurve represents a series of samples, where each value is associated with an interval ( $[y1,y2] = f(x)$ ) 更多...

#include <qwt_plot_intervalcurve.h>

类 QwtPlotIntervalCurve 继承关系图:

类
class	PrivateData

Public 类型
enum	CurveStyle { NoCurve , Tube , UserCurve = 100 }
	Curve styles 更多...

enum	PaintAttribute { ClipPolygons = 0x01 , ClipSymbol = 0x02 }
	Attributes to modify the drawing algorithm 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
	QwtPlotIntervalCurve (const QString &title=QString())

	QwtPlotIntervalCurve (const QwtText &title)
	Constructor

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

void	attach (QwtPlot *plot) override
	Attach the interval curve to a plot

void	setPaintAttribute (PaintAttribute, bool on=true)
	Specify an attribute how to draw the curve

bool	testPaintAttribute (PaintAttribute) const
	Test if a paint attribute is enabled

void	setSamples (const QVector< QwtIntervalSample > &)
	Initialize data with an array of samples

void	setSamples (QwtSeriesData< QwtIntervalSample > *)
	Assign a series of samples

void	setPen (const QColor &, qreal width=0.0, Qt::PenStyle=Qt::SolidLine)
	Build and assign a pen

void	setPen (const QPen &)
	Assign a pen

const QPen &	pen () const
	Get the pen used to draw the lines

void	setBrush (const QBrush &)
	Assign a brush

const QBrush &	brush () const
	Get the brush used to fill the area in Tube style()

void	setStyle (CurveStyle style)
	Set the curve's drawing style

CurveStyle	style () const
	Get the curve's drawing style

void	setSymbol (const QwtIntervalSymbol *)
	Assign a symbol

const QwtIntervalSymbol *	symbol () const
	Get the current symbol

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

virtual QRectF	boundingRect () const override
	Get the bounding rectangle of all samples

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

Public 成员函数继承自 QwtPlotSeriesItem
	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	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

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	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

Public 成员函数继承自 QwtSeriesStore< QwtIntervalSample >
void	setData (QwtSeriesData< QwtIntervalSample > *series)

QwtSeriesData< QwtIntervalSample > *	data ()

const QwtSeriesData< QwtIntervalSample > *	data () const

QwtIntervalSample	sample (size_t index) const

virtual size_t	dataSize () const override

virtual QRectF	dataRect () const override

virtual void	setRectOfInterest (const QRectF &rect) override
	Set a the "rectangle of interest" for the stored series

QwtSeriesData< QwtIntervalSample > *	swapData (QwtSeriesData< QwtIntervalSample > *series)

Protected 成员函数
void	init ()
	Initialize the curve

virtual void	drawTube (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const
	Draw the tube

virtual void	drawSymbols (QPainter *, const QwtIntervalSymbol &, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const
	Draw the symbols

Protected 成员函数继承自 QwtPlotSeriesItem
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

详细描述

QwtPlotIntervalCurve represents a series of samples, where each value is associated with an interval ( $[y1,y2] = f(x)$ )

The representation depends on the style() and an optional symbol() that is displayed for each interval. QwtPlotIntervalCurve might be used to display error bars or the area between 2 curves.

成员枚举类型说明

◆ CurveStyle

enum QwtPlotIntervalCurve::CurveStyle

Curve styles

The default setting is QwtPlotIntervalCurve::Tube.

参见: setStyle(), style()

枚举值
NoCurve	Don't draw a curve. Note: This doesn't affect the symbols.
Tube	Build 2 curves from the upper and lower limits of the intervals and draw them with the pen(). The area between the curves is filled with the brush().
UserCurve	Styles >= QwtPlotIntervalCurve::UserCurve are reserved for derived classes that overload drawSeries() with additional application specific curve types.

◆ PaintAttribute

enum QwtPlotIntervalCurve::PaintAttribute

Attributes to modify the drawing algorithm

参见: setPaintAttribute(), testPaintAttribute()

枚举值
ClipPolygons	Clip polygons before painting them. In situations, where points are far outside the visible area (f.e when zooming deep) this might be a substantial improvement for the painting performance.
ClipSymbol	Check if a symbol is on the plot canvas before painting it

构造及析构函数说明

◆ QwtPlotIntervalCurve()

QwtPlotIntervalCurve::QwtPlotIntervalCurve ( 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

◆ attach()

void QwtPlotIntervalCurve::attach ( QwtPlot * plot )

overridevirtual

Attach the interval curve to a plot

If the pen has not been explicitly set by the user, the interval curve automatically receives a color from the plot's color cycle. The brush is set to a semi-transparent version of the same color.

参数

plot	Plot to attach to (nullptr to detach)

重载 QwtPlotItem .

◆ boundingRect()

QRectF QwtPlotIntervalCurve::boundingRect ( ) const

overridevirtual

Get the bounding rectangle of all samples

返回: Bounding rectangle of all samples. For an empty series the rectangle is invalid.

重载 QwtPlotSeriesItem .

◆ brush()

const QBrush & QwtPlotIntervalCurve::brush ( ) const

Get the brush used to fill the area in Tube style()

返回: Brush used to fill the area in Tube style()

参见: setBrush(), setStyle(), CurveStyle

◆ drawSeries()

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

overridevirtual

Draw a subset of the samples

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
[in]	from	Index of the first sample to be painted
[in]	to	Index of the last sample to be painted. If to < 0, the series will be painted to its last sample.

参见: drawTube(), drawSymbols()

实现了 QwtPlotSeriesItem.

◆ drawSymbols()

void QwtPlotIntervalCurve::drawSymbols	(	QPainter *	painter,
		const QwtIntervalSymbol &	symbol,
		const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRectF &	canvasRect,
		int	from,
		int	to
	)		const

protectedvirtual

Draw the symbols

Draw symbols for a subset of the samples

参数

painter	Painter
symbol	Interval symbol
xMap	x map
yMap	y map
canvasRect	Contents rectangle of the canvas
from	Index of the first sample to be painted
to	Index of the last sample to be painted

参见: setSymbol(), drawSeries(), drawTube()

◆ drawTube()

void QwtPlotIntervalCurve::drawTube	(	QPainter *	painter,
		const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRectF &	canvasRect,
		int	from,
		int	to
	)		const

protectedvirtual

Draw the tube

Draw a tube

Builds 2 curves from the upper and lower limits of the intervals and draws them with the pen(). The area between the curves is filled with the brush().

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 sample to be painted
to	Index of the last sample to be painted. If to < 0 the series will be painted to its last sample.

参见: drawSeries(), drawSymbols()

◆ init()

void QwtPlotIntervalCurve::init ( )

protected

Initialize the curve

Initialize internal members

◆ legendIcon()

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

overridevirtual

Get the icon for the legend

In case of Tube style() the icon is a plain rectangle filled with the brush(). If a symbol is assigned it is scaled to size.

参数

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

返回: Icon for the legend

参见: QwtPlotItem::setLegendIconSize(), QwtPlotItem::legendData()

重载 QwtPlotItem .

◆ pen()

const QPen & QwtPlotIntervalCurve::pen ( ) const

Get the pen used to draw the lines

返回: Pen used to draw the lines

参见: setPen(), brush()

◆ rtti()

int QwtPlotIntervalCurve::rtti ( ) const

overridevirtual

Get the runtime type information

返回: QwtPlotItem::Rtti_PlotIntervalCurve

重载 QwtPlotItem .

◆ setBrush()

void QwtPlotIntervalCurve::setBrush ( const QBrush & brush )

Assign a brush

The brush is used to fill the area in Tube style().

参数

[in] brush Brush

参见: brush(), pen(), setStyle(), CurveStyle

◆ setPaintAttribute()

void QwtPlotIntervalCurve::setPaintAttribute	(	PaintAttribute	attribute,
		bool	on = `true`
	)

Specify an attribute how to draw the curve

参数

[in]	attribute	Paint attribute
[in]	on	On/Off

参见: testPaintAttribute()

◆ setPen() [1/2]

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

Build and assign a pen

In Qt5 the default pen width is 1.0 (0.0 in Qt4) what 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()

◆ setPen() [2/2]

void QwtPlotIntervalCurve::setPen ( const QPen & pen )

Assign a pen

参数

[in] pen New pen

参见: pen(), brush()

◆ setSamples() [1/2]

void QwtPlotIntervalCurve::setSamples ( const QVector< QwtIntervalSample > & samples )

Initialize data with an array of samples

参数

[in] samples Vector of samples

◆ setSamples() [2/2]

void QwtPlotIntervalCurve::setSamples ( QwtSeriesData< QwtIntervalSample > * data )

Assign a series of samples

setSamples() is just a wrapper for setData() without any additional value - beside that it is easier to find for the developer.

参数

[in] data Data

警告: The item takes ownership of the data object, deleting it when its not used anymore.

◆ setStyle()

void QwtPlotIntervalCurve::setStyle ( CurveStyle style )

Set the curve's drawing style

参数

[in] style Curve style

参见: CurveStyle, style()

◆ setSymbol()

void QwtPlotIntervalCurve::setSymbol ( const QwtIntervalSymbol * symbol )

Assign a symbol

参数

[in] symbol Symbol

参见: symbol()

◆ style()

QwtPlotIntervalCurve::CurveStyle QwtPlotIntervalCurve::style ( ) const

Get the curve's drawing style

返回: Style of the curve

参见: setStyle()

◆ symbol()

const QwtIntervalSymbol * QwtPlotIntervalCurve::symbol ( ) const

Get the current symbol

返回: Current symbol or nullptr when no symbol has been assigned

参见: setSymbol()

◆ testPaintAttribute()

bool QwtPlotIntervalCurve::testPaintAttribute ( PaintAttribute attribute ) const

Test if a paint attribute is enabled

返回: True when attribute is enabled

参见: PaintAttribute, setPaintAttribute()

该类的文档由以下文件生成:

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

◆ CurveStyle

◆ PaintAttribute

构造及析构函数说明

◆ QwtPlotIntervalCurve()

成员函数说明

◆ attach()

◆ boundingRect()

◆ brush()

◆ drawSeries()

◆ drawSymbols()

◆ drawTube()

◆ init()

◆ legendIcon()

◆ pen()

◆ rtti()

◆ setBrush()

◆ setPaintAttribute()

◆ setPen() [1/2]

◆ setPen() [2/2]

◆ setSamples() [1/2]

◆ setSamples() [2/2]

◆ setStyle()

◆ setSymbol()

◆ style()

◆ symbol()

◆ testPaintAttribute()