QwtVectorFieldThinArrow类 参考

Arrow implementation that only used lines, with optionally a filled arrow or only lines. 更多...

#include <qwt_vectorfield_symbol.h>

类 QwtVectorFieldThinArrow 继承关系图:

类
class	PrivateData

Public 成员函数
	QwtVectorFieldThinArrow (qreal headWidth=6.0)
	Constructor with head width parameter
virtual	~QwtVectorFieldThinArrow () override
	Destructor
virtual void	setLength (qreal length) override
	Set the length of the arrow
virtual qreal	length () const override
	Return the length of the arrow
virtual void	paint (QPainter *) const override
	Draw the arrow
Public 成员函数 继承自 QwtVectorFieldSymbol
	QwtVectorFieldSymbol ()
	Constructor
virtual	~QwtVectorFieldSymbol ()
	Destructor

详细描述

Arrow implementation that only used lines, with optionally a filled arrow or only lines.

构造及析构函数说明

QwtVectorFieldThinArrow()

QwtVectorFieldThinArrow::QwtVectorFieldThinArrow

(

qreal

headWidth = 6.0

)

Constructor with head width parameter

Constructor

The length is initialized by headWidth + 4

参数

headWidth

Width of the triangular head

参见

setLength()

成员函数说明

length()

qreal QwtVectorFieldThinArrow::length ( ) const

overridevirtual

Return the length of the arrow

返回

Length of the arrow in pixels

参见

setLength()

实现了 QwtVectorFieldSymbol.

paint()

void QwtVectorFieldThinArrow::paint ( QPainter *  p ) const

overridevirtual

Draw the arrow

Draw the arrow using QPainter

参数

[in]

p

Painter to use for drawing

实现了 QwtVectorFieldSymbol.

setLength()

void QwtVectorFieldThinArrow::setLength ( qreal  length )

overridevirtual

Set the length of the arrow

Adjusts the head width proportionally when length is very small

参数

[in]

length

Length of the arrow in pixels

参见

length()

实现了 QwtVectorFieldSymbol.

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该类的文档由以下文件生成:

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