QwtDialNeedle类 参考

Base class for needles that can be used in a QwtDial 更多...

#include <qwt_dial_needle.h>

类 QwtDialNeedle 继承关系图:

Public 成员函数
	QwtDialNeedle ()
	Constructor
virtual	~QwtDialNeedle ()
	Destructor
virtual void	setPalette (const QPalette &)
	Set the palette for the needle
const QPalette &	palette () const
	Return the palette of the needle
void	setFlatStyle (bool)
	Set flat style
bool	flatStyle () const
	Return flat style
virtual void	draw (QPainter *, const QPointF &center, double length, double direction, QPalette::ColorGroup=QPalette::Active) const
	Draw the needle

Protected 成员函数
virtual void	drawNeedle (QPainter *painter, double length, QPalette::ColorGroup colorGroup) const =0
	Draw the needle
virtual void	drawKnob (QPainter *, double width, const QBrush &, bool sunken) const
	Draw the knob

Protected 属性
QPalette	m_palette
bool	m_flatStyle

详细描述

Base class for needles that can be used in a QwtDial

QwtDialNeedle is a pointer that indicates a value by pointing to a specific direction.

参见

QwtDial, QwtCompass

成员函数说明

draw()

void QwtDialNeedle::draw ( QPainter *  painter, const QPointF &  center, double  length, double  direction, QPalette::ColorGroup  colorGroup = QPalette::Active  ) const

virtual

Draw the needle

参数

[in]	painter	Painter
[in]	center	Center of the dial, start position for the needle
[in]	length	Length of the needle
[in]	direction	Direction of the needle, in degrees counter clockwise
[in]	colorGroup	Color group, used for painting

drawNeedle()

virtual void QwtDialNeedle::drawNeedle ( QPainter *  painter, double  length, QPalette::ColorGroup  colorGroup  ) const

protectedpure virtual

Draw the needle

The origin of the needle is at position (0.0, 0.0 ) pointing in direction 0.0 ( = east ).

The painter is already initialized with translation and rotation.

参数

painter	Painter
length	Length of the needle
colorGroup	Color group, used for painting

参见

setPalette(), palette()

在 QwtDialSimpleNeedle, QwtCompassMagnetNeedle , 以及 QwtCompassWindArrow 内被实现.

flatStyle()

bool QwtDialNeedle::flatStyle

(

)

const

Return flat style

Return whether flat style is enabled

参见

setFlatStyle()

palette()

const QPalette & QwtDialNeedle::palette

(

)

const

Return the palette of the needle

返回

Palette of the needle

setFlatStyle()

void QwtDialNeedle::setFlatStyle

(

bool

on

)

Set flat style

When enabled (default), needles and knobs are drawn with flat colors instead of 3D shaded effects (Light/Dark gradients).

参数

on	true for flat style, false for classic 3D style

参见

flatStyle()

setPalette()

void QwtDialNeedle::setPalette ( const QPalette &  palette )

virtual

Set the palette for the needle

Sets the palette for the needle

参数

[in]

palette

New Palette

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该类的文档由以下文件生成:

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