QwtIntervalSymbol类 参考

A drawing primitive for displaying an interval like an error bar 更多...

#include <qwt_interval_symbol.h>

类
class	PrivateData

Public 类型
enum	Style { NoSymbol = -1 , Bar , Box , UserSymbol = 1000 }
	Symbol style 更多...

Public 成员函数
	QwtIntervalSymbol (Style=NoSymbol)
	Constructor
	QwtIntervalSymbol (const QwtIntervalSymbol &)
QwtIntervalSymbol &	operator= (const QwtIntervalSymbol &)
	Assignment operator
bool	operator== (const QwtIntervalSymbol &) const
	Compare two symbols
bool	operator!= (const QwtIntervalSymbol &) const
	Compare two symbols
void	setWidth (int)
	Specify the width of the symbol
int	width () const
	Get the width of the symbol
void	setBrush (const QBrush &)
	Assign a brush
const QBrush &	brush () const
	Get the brush
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
void	setStyle (Style)
	Specify the symbol style
Style	style () const
	Get the current symbol style
virtual void	draw (QPainter *, Qt::Orientation, const QPointF &from, const QPointF &to) const
	Draw a symbol depending on its style

详细描述

A drawing primitive for displaying an interval like an error bar

参见

QwtPlotIntervalCurve

成员枚举类型说明

Style

enum QwtIntervalSymbol::Style

Symbol style

枚举值
NoSymbol	No Style. The symbol cannot be drawn.
Bar	The symbol displays a line with caps at the beginning/end. The size of the caps depends on the symbol width().
Box	The symbol displays a plain rectangle using pen() and brush(). The size of the rectangle depends on the translated interval and the width().
UserSymbol	Styles >= UserSymbol are reserved for derived classes of QwtIntervalSymbol that overload draw() with additional application specific symbol types.

构造及析构函数说明

QwtIntervalSymbol()

QwtIntervalSymbol::QwtIntervalSymbol ( Style  style = NoSymbol )

explicit

Constructor

参数

[in]

style

Style of the symbol

参见

setStyle(), style(), Style

Copy constructor

参数

[in]

other

Symbol to copy

Destructor

成员函数说明

brush()

const QBrush & QwtIntervalSymbol::brush

(

)

const

Get the brush

返回

Brush

参见

setBrush()

draw()

void QwtIntervalSymbol::draw ( QPainter *  painter, Qt::Orientation  orientation, const QPointF &  from, const QPointF &  to  ) const

virtual

Draw a symbol depending on its style

参数

[in]	painter	Painter
[in]	orientation	Orientation
[in]	from	Start point of the interval in target device coordinates
[in]	to	End point of the interval in target device coordinates

参见

setStyle()

operator!=()

bool QwtIntervalSymbol::operator!=

(

const QwtIntervalSymbol &

other

)

const

Compare two symbols

参数

[in]

other

Symbol to compare

返回

True if symbols are not equal

operator=()

QwtIntervalSymbol & QwtIntervalSymbol::operator=

(

const QwtIntervalSymbol &

other

)

Assignment operator

参数

[in]

other

Symbol to assign

返回

Reference to this symbol

operator==()

bool QwtIntervalSymbol::operator==

(

const QwtIntervalSymbol &

other

)

const

Compare two symbols

参数

[in]

other

Symbol to compare

返回

True if symbols are equal

pen()

const QPen & QwtIntervalSymbol::pen

(

)

const

Get the pen

返回

Pen

参见

setPen(), brush()

setBrush()

void QwtIntervalSymbol::setBrush

(

const QBrush &

brush

)

Assign a brush

The brush is used for the Box style.

参数

[in]

brush

Brush

参见

brush()

setPen() [1/2]

void QwtIntervalSymbol::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 QwtIntervalSymbol::setPen

(

const QPen &

pen

)

Assign a pen

参数

[in]

pen

Pen

参见

pen(), setBrush()

setStyle()

void QwtIntervalSymbol::setStyle

(

Style

style

)

Specify the symbol style

参数

[in]

style

Style

参见

style(), Style

setWidth()

void QwtIntervalSymbol::setWidth

(

int

width

)

Specify the width of the symbol

It is used depending on the style.

参数

[in]

width

Width

参见

width(), setStyle()

style()

QwtIntervalSymbol::Style QwtIntervalSymbol::style

(

)

const

Get the current symbol style

返回

Current symbol style

参见

setStyle()

width()

int QwtIntervalSymbol::width

(

)

const

Get the width of the symbol

返回

Width of the symbol

参见

setWidth(), setStyle()

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该类的文档由以下文件生成:

• /home/runner/work/QWT/QWT/src/plot/qwt_interval_symbol.h
• /home/runner/work/QWT/QWT/src/plot/qwt_interval_symbol.cpp