QwtPlotTradingCurve illustrates movements in the price of a financial instrument over time 更多...

#include <qwt_plot_tradingcurve.h>

类 QwtPlotTradingCurve 继承关系图:

类
class	PrivateData

Public 类型
enum	SymbolStyle { NoSymbol = -1 , Bar , CandleStick , UserSymbol = 100 }
	Symbol styles 更多...

enum	Direction { Increasing , Decreasing }
	Direction of a price movement 更多...

enum	PaintAttribute { ClipSymbols = 0x01 }
	Paint attributes 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
	QwtPlotTradingCurve (const QString &title=QString())

	QwtPlotTradingCurve (const QwtText &title)
	Constructor

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

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

bool	testPaintAttribute (PaintAttribute) const
	Test a paint attribute

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

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

void	setSymbolStyle (SymbolStyle style)
	Set the symbol style

SymbolStyle	symbolStyle () const
	Get the symbol style

void	setSymbolPen (const QColor &, qreal width=0.0, Qt::PenStyle=Qt::SolidLine)
	Build and assign the symbol pen

void	setSymbolPen (const QPen &)
	Set the symbol pen

QPen	symbolPen () const
	Get the symbol pen

void	setSymbolBrush (Direction, const QBrush &)
	Set the symbol brush

QBrush	symbolBrush (Direction) const
	Get the symbol brush

void	setSymbolExtent (double)
	Set the extent of the symbol

double	symbolExtent () const
	Get the extent of the symbol

void	setMinSymbolWidth (double)
	Set a minimum for the symbol width

double	minSymbolWidth () const
	Get the minimum for the symbol width

void	setMaxSymbolWidth (double)
	Set a maximum for the symbol width

double	maxSymbolWidth () const
	Get the maximum for the symbol width

virtual void	drawSeries (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const override
	Draw an interval of the curve

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

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

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

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	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< QwtOHLCSample >
void	setData (QwtSeriesData< QwtOHLCSample > *series)

QwtSeriesData< QwtOHLCSample > *	data ()

const QwtSeriesData< QwtOHLCSample > *	data () const

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

Protected 成员函数
void	init ()
	Initialize internal members

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

virtual void	drawUserSymbol (QPainter *, SymbolStyle, const QwtOHLCSample &, Qt::Orientation, bool inverted, double symbolWidth) const
	Draw a symbol for a symbol style >= UserSymbol

void	drawBar (QPainter *, const QwtOHLCSample &, Qt::Orientation, bool inverted, double width) const
	Draw a bar

void	drawCandleStick (QPainter *, const QwtOHLCSample &, Qt::Orientation, double width) const
	Draw a candle stick

virtual double	scaledSymbolWidth (const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect) const
	Calculate the symbol width in paint coordinates

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

QwtPlotTradingCurve illustrates movements in the price of a financial instrument over time

QwtPlotTradingCurve supports candlestick or bar ( OHLC ) charts that are used in the domain of technical analysis.

While the length ( height or width depending on orientation() ) of each symbol depends on the corresponding OHLC sample the size of the other dimension can be controlled using:

setSymbolExtent()
setSymbolMinWidth()
setSymbolMaxWidth()

The extent is a size in scale coordinates, so that the symbol width is increasing when the plot is zoomed in. Minimum/Maximum width is in widget coordinates independent from the zoom level. When setting the minimum and maximum to the same value, the width of the symbol is fixed.

成员枚举类型说明

◆ Direction

enum QwtPlotTradingCurve::Direction

Direction of a price movement

枚举值
Increasing	The closing price is higher than the opening price
Decreasing	The closing price is lower than the opening price

◆ PaintAttribute

enum QwtPlotTradingCurve::PaintAttribute

Paint attributes

Attributes to modify the drawing algorithm.

参见: setPaintAttribute(), testPaintAttribute()

枚举值
ClipSymbols	Check if a symbol is on the plot canvas before painting it.

◆ SymbolStyle

enum QwtPlotTradingCurve::SymbolStyle

Symbol styles

The default setting is QwtPlotSeriesItem::CandleStick.

参见: setSymbolStyle(), symbolStyle()

枚举值
NoSymbol	Nothing is displayed
Bar	A line on the chart shows the price range (the highest and lowest prices) over one unit of time, e.g. one day or one hour. Tick marks project from each side of the line indicating the opening and closing price.
CandleStick	The range between opening/closing price are displayed as a filled box. The fill brush depends on the direction of the price movement. The box is connected to the highest/lowest values by lines.
UserSymbol	SymbolTypes >= UserSymbol are displayed by drawUserSymbol(), that needs to be overloaded and implemented in derived curve classes. 参见 drawUserSymbol()

构造及析构函数说明

◆ QwtPlotTradingCurve()

QwtPlotTradingCurve::QwtPlotTradingCurve ( 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 QwtPlotTradingCurve::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 .

◆ drawBar()

void QwtPlotTradingCurve::drawBar	(	QPainter *	painter,
		const QwtOHLCSample &	sample,
		Qt::Orientation	orientation,
		bool	inverted,
		double	width
	)		const

protected

Draw a bar

参数

[in]	painter	Qt painter, initialized with pen/brush
[in]	sample	Sample, already translated into paint device coordinates
[in]	orientation	Vertical or horizontal
[in]	inverted	When inverted is false the open tick is painted to the left/top, otherwise it is painted right/bottom. The close tick is painted in the opposite direction of the open tick.
[in]	width	Width or height of the candle, depending on the orientation

参见: Bar

◆ drawCandleStick()

void QwtPlotTradingCurve::drawCandleStick	(	QPainter *	painter,
		const QwtOHLCSample &	sample,
		Qt::Orientation	orientation,
		double	width
	)		const

protected

Draw a candle stick

参数

[in]	painter	Qt painter, initialized with pen/brush
[in]	sample	Samples already translated into paint device coordinates
[in]	orientation	Vertical or horizontal
[in]	width	Width or height of the candle, depending on the orientation

参见: CandleStick

◆ drawSeries()

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

overridevirtual

Draw an interval of the curve

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 point to be painted
[in]	to	Index of the last point to be painted. If to < 0 the curve will be painted to its last point.

参见: drawSymbols()

实现了 QwtPlotSeriesItem.

◆ drawSymbols()

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

protectedvirtual

Draw symbols

参数

[in]	painter	Painter
[in]	xMap	x map
[in]	yMap	y map
[in]	canvasRect	Contents rectangle of the canvas
[in]	from	Index of the first point to be painted
[in]	to	Index of the last point to be painted

参见: drawSeries()

◆ drawUserSymbol()

void QwtPlotTradingCurve::drawUserSymbol	(	QPainter *	painter,
		SymbolStyle	symbolStyle,
		const QwtOHLCSample &	sample,
		Qt::Orientation	orientation,
		bool	inverted,
		double	symbolWidth
	)		const

protectedvirtual

Draw a symbol for a symbol style >= UserSymbol

The implementation does nothing and is intended to be overloaded

参数

[in]	painter	Qt painter, initialized with pen/brush
[in]	symbolStyle	Symbol style
[in]	sample	Samples already translated into paint device coordinates
[in]	orientation	Vertical or horizontal
[in]	inverted	True, when the opposite scale ( Qt::Vertical: x, Qt::Horizontal: y ) is increasing in the opposite direction as QPainter coordinates.
[in]	symbolWidth	Width of the symbol in paint device coordinates

◆ init()

void QwtPlotTradingCurve::init ( )

protected

Initialize internal members

Sets default attributes and creates internal data storage.

◆ legendIcon()

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

overridevirtual

Get a legend icon

Returns a rectangle filled with the color of the symbol pen

参数

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

返回: Legend icon

参见: setLegendIconSize(), legendData()

重载 QwtPlotItem .

◆ maxSymbolWidth()

double QwtPlotTradingCurve::maxSymbolWidth ( ) const

Get the maximum for the symbol width

返回: Maximum for the symbol width

参见: setMaxSymbolWidth(), minSymbolWidth(), symbolExtent()

◆ minSymbolWidth()

double QwtPlotTradingCurve::minSymbolWidth ( ) const

Get the minimum for the symbol width

返回: Minimum for the symbol width

参见: setMinSymbolWidth(), maxSymbolWidth(), symbolExtent()

◆ rtti()

int QwtPlotTradingCurve::rtti ( ) const

overridevirtual

Get the runtime type information

返回: QwtPlotItem::Rtti_PlotTradingCurve

重载 QwtPlotItem .

◆ scaledSymbolWidth()

double QwtPlotTradingCurve::scaledSymbolWidth	(	const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRectF &	canvasRect
	)		const

protectedvirtual

Calculate the symbol width in paint coordinates

The width is calculated by scaling the symbol extent into paint device coordinates bounded by the minimum/maximum symbol width.

参数

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

返回: Symbol width in paint coordinates

参见: symbolExtent(), minSymbolWidth(), maxSymbolWidth()

◆ setMaxSymbolWidth()

void QwtPlotTradingCurve::setMaxSymbolWidth ( double width )

Set a maximum for the symbol width

A value <= 0.0 means an unlimited width

参数

[in] width Width in paint device coordinates

参见: maxSymbolWidth(), setMinSymbolWidth(), setSymbolExtent()

◆ setMinSymbolWidth()

void QwtPlotTradingCurve::setMinSymbolWidth ( double width )

Set a minimum for the symbol width

参数

[in] width Width in paint device coordinates

参见: minSymbolWidth(), setMaxSymbolWidth(), setSymbolExtent()

◆ setPaintAttribute()

void QwtPlotTradingCurve::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()

◆ setSamples() [1/2]

void QwtPlotTradingCurve::setSamples ( const QVector< QwtOHLCSample > & samples )

Initialize data with an array of samples

参数

[in] samples Vector of samples

参见: QwtPlotSeriesItem::setData()

◆ setSamples() [2/2]

void QwtPlotTradingCurve::setSamples ( QwtSeriesData< QwtOHLCSample > * 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.

◆ setSymbolBrush()

void QwtPlotTradingCurve::setSymbolBrush	(	Direction	direction,
		const QBrush &	brush
	)

Set the symbol brush

参数

[in]	direction	Direction type
[in]	brush	Brush used to fill the body of all candlestick symbols with the direction

参见: symbolBrush(), setSymbolPen()

◆ setSymbolExtent()

void QwtPlotTradingCurve::setSymbolExtent ( double extent )

Set the extent of the symbol

The width of the symbol is given in scale coordinates. When painting a symbol the width is scaled into paint device coordinates by scaledSymbolWidth(). The scaled width is bounded by minSymbolWidth(), maxSymbolWidth()

参数

[in] extent Symbol width in scale coordinates

参见: symbolExtent(), scaledSymbolWidth(), setMinSymbolWidth(), setMaxSymbolWidth()

◆ setSymbolPen() [1/2]

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

Build and assign the symbol 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()

◆ setSymbolPen() [2/2]

void QwtPlotTradingCurve::setSymbolPen ( const QPen & pen )

Set the symbol pen

The symbol pen is used for rendering the lines of the bar or candlestick symbols

参数

[in] pen Pen

参见: symbolPen(), setSymbolBrush()

◆ setSymbolStyle()

void QwtPlotTradingCurve::setSymbolStyle ( SymbolStyle style )

Set the symbol style

参数

[in] style Symbol style

参见: symbolStyle(), setSymbolExtent(), setSymbolPen(), setSymbolBrush()

◆ symbolBrush()

QBrush QwtPlotTradingCurve::symbolBrush ( Direction direction ) const

Get the symbol brush

参数

[in] direction Direction type

返回: Brush used to fill the body of all candlestick symbols with the direction

参见: setSymbolPen(), symbolBrush()

◆ symbolExtent()

double QwtPlotTradingCurve::symbolExtent ( ) const

Get the extent of the symbol

返回: Extent of a symbol in scale coordinates

参见: setSymbolExtent(), scaledSymbolWidth(), minSymbolWidth(), maxSymbolWidth()

◆ symbolPen()

QPen QwtPlotTradingCurve::symbolPen ( ) const

Get the symbol pen

返回: Symbol pen

参见: setSymbolPen(), symbolBrush()

◆ symbolStyle()

QwtPlotTradingCurve::SymbolStyle QwtPlotTradingCurve::symbolStyle ( ) const

Get the symbol style

返回: Symbol style

参见: setSymbolStyle(), symbolExtent(), symbolPen(), symbolBrush()

◆ testPaintAttribute()

bool QwtPlotTradingCurve::testPaintAttribute ( PaintAttribute attribute ) const

Test a paint attribute

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_tradingcurve.h
/home/runner/work/QWT/QWT/src/plot/qwt_plot_tradingcurve.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

◆ Direction

◆ PaintAttribute

◆ SymbolStyle

构造及析构函数说明

◆ QwtPlotTradingCurve()

成员函数说明

◆ boundingRect()

◆ drawBar()

◆ drawCandleStick()

◆ drawSeries()

◆ drawSymbols()

◆ drawUserSymbol()

◆ init()

◆ legendIcon()

◆ maxSymbolWidth()

◆ minSymbolWidth()

◆ rtti()

◆ scaledSymbolWidth()

◆ setMaxSymbolWidth()

◆ setMinSymbolWidth()

◆ setPaintAttribute()

◆ setSamples() [1/2]

◆ setSamples() [2/2]

◆ setSymbolBrush()

◆ setSymbolExtent()

◆ setSymbolPen() [1/2]

◆ setSymbolPen() [2/2]

◆ setSymbolStyle()

◆ symbolBrush()

◆ symbolExtent()

◆ symbolPen()

◆ symbolStyle()

◆ testPaintAttribute()