#include <qwt_knob.h>

类 QwtKnob 继承关系图:

类
class	PrivateData

Public 类型
enum	KnobStyle { Flat , Raised , Sunken , Styled }
	旋钮表面样式更多...

enum	MarkerStyle { NoMarker = -1 , Tick , Triangle , Dot , Nub , Notch }
	标记类型更多...

Public 成员函数
	QwtKnob (QWidget *parent=nullptr)
	Constructor

virtual	~QwtKnob ()
	Destructor

void	setAlignment (Qt::Alignment)
	Set alignment of the knob inside contentsRect()

Qt::Alignment	alignment () const
	Return alignment of the knob

void	setKnobWidth (int)
	Set the knob's width (diameter)

int	knobWidth () const
	Return the knob's width

void	setNumTurns (int)
	Set the number of turns for the knob

int	numTurns () const
	Return the number of turns

void	setTotalAngle (double angle)
	Set the total angle which the knob can be turned

double	totalAngle () const
	Return the total angle

void	setKnobStyle (KnobStyle)
	Set the knob style

KnobStyle	knobStyle () const
	Return the knob style

void	setBorderWidth (int)
	Set the border width

int	borderWidth () const
	Return the border width

void	setMarkerStyle (MarkerStyle)
	Set the marker style

MarkerStyle	markerStyle () const
	Return the marker style

void	setMarkerSize (int)
	Set the marker size

int	markerSize () const
	Return the marker size

virtual QSize	sizeHint () const override
	Return size hint

virtual QSize	minimumSizeHint () const override
	Return minimum size hint

void	setScaleDraw (QwtRoundScaleDraw *)
	Set the scale draw

const QwtRoundScaleDraw *	scaleDraw () const
	Return the scale draw (const version)

QwtRoundScaleDraw *	scaleDraw ()
	Return the scale draw (non-const version)

QRect	knobRect () const
	Return the bounding rectangle of the knob

Public 成员函数继承自 QwtAbstractSlider
	QwtAbstractSlider (QWidget *parent=nullptr)
	Constructor for QwtAbstractSlider (English only)

virtual	~QwtAbstractSlider ()
	Destructor for QwtAbstractSlider (English only)

void	setValid (bool)
	Set whether the slider is valid (English only)

bool	isValid () const
	Return whether the slider is valid (English only)

double	value () const
	Return the current value (English only)

void	setWrapping (bool)
	Set whether wrapping is enabled (English only)

bool	wrapping () const
	Return whether wrapping is enabled (English only)

void	setTotalSteps (uint)
	Set the total number of steps (English only)

uint	totalSteps () const
	Return the total number of steps (English only)

void	setSingleSteps (uint)
	Set the number of single steps (English only)

uint	singleSteps () const
	Return the number of single steps (English only)

void	setPageSteps (uint)
	Set the number of page steps (English only)

uint	pageSteps () const
	Return the number of page steps (English only)

void	setStepAlignment (bool)
	Set whether step alignment is enabled (English only)

bool	stepAlignment () const
	Return whether step alignment is enabled (English only)

void	setTracking (bool)
	Set whether tracking is enabled (English only)

bool	isTracking () const
	Return whether tracking is enabled (English only)

void	setReadOnly (bool)
	Set whether the slider is read-only (English only)

bool	isReadOnly () const
	Return whether the slider is read-only (English only)

void	setInvertedControls (bool)
	Set whether controls are inverted (English only)

bool	invertedControls () const
	Return whether controls are inverted (English only)

Public 成员函数继承自 QwtAbstractScale
	QwtAbstractScale (QWidget *parent=nullptr)
	QwtAbstractScale 构造函数

virtual	~QwtAbstractScale ()
	QwtAbstractScale 析构函数

void	setScale (double lowerBound, double upperBound)
	通过区间边界指定刻度

void	setScale (const QwtInterval &)
	通过区间对象指定刻度

void	setScale (const QwtScaleDiv &)
	通过刻度划分指定刻度

const QwtScaleDiv &	scaleDiv () const
	返回刻度划分

void	setLowerBound (double value)
	设置刻度的下界

double	lowerBound () const
	返回刻度的下界

void	setUpperBound (double value)
	设置刻度的上界

double	upperBound () const
	返回刻度的上界

void	setScaleStepSize (double stepSize)
	设置用于计算刻度划分的步长

double	scaleStepSize () const
	返回步长提示值

void	setScaleMaxMajor (int ticks)
	设置主刻度间隔的最大数量

int	scaleMaxMinor () const
	返回次刻度间隔的最大数量

void	setScaleMaxMinor (int ticks)
	设置次刻度间隔的最大数量

int	scaleMaxMajor () const
	返回主刻度间隔的最大数量

void	setScaleEngine (QwtScaleEngine *)
	设置刻度引擎

const QwtScaleEngine *	scaleEngine () const
	返回刻度引擎（常量版本）

QwtScaleEngine *	scaleEngine ()
	返回刻度引擎（非常量版本）

int	transform (double) const
	将刻度值转换为控件坐标

double	invTransform (int) const
	将控件坐标转换为刻度值

bool	isInverted () const
	检查刻度是否反向

double	minimum () const
	返回最小边界

double	maximum () const
	返回最大边界

const QwtScaleMap &	scaleMap () const
	返回刻度映射

Protected 成员函数
virtual void	paintEvent (QPaintEvent *) override
	Repaint the knob

virtual void	changeEvent (QEvent *) override
	Handle QEvent::StyleChange and QEvent::FontChange;

virtual void	drawKnob (QPainter *, const QRectF &) const
	Draw the knob

virtual void	drawFocusIndicator (QPainter *) const
	Draw the focus indicator

virtual void	drawMarker (QPainter *, const QRectF &, double angle) const
	Draw the marker at the knob's front

virtual double	scrolledTo (const QPoint &) const override
	Determine the value for a new position of the mouse

virtual bool	isScrollPosition (const QPoint &) const override
	Determine what to do when the user presses a mouse button.

Protected 成员函数继承自 QwtAbstractSlider
virtual void	mousePressEvent (QMouseEvent *) override
	Handle mouse press events (English only)

virtual void	mouseReleaseEvent (QMouseEvent *) override
	Handle mouse release events (English only)

virtual void	mouseMoveEvent (QMouseEvent *) override
	Handle mouse move events (English only)

virtual void	keyPressEvent (QKeyEvent *) override
	Handle key press events (English only)

virtual void	wheelEvent (QWheelEvent *) override
	Handle wheel events (English only)

void	incrementValue (int stepCount)
	Increment the value by a number of steps (English only)

virtual void	scaleChange () override
	Handle scale changes (English only)

virtual void	sliderChange ()
	Handle slider changes (English only)

double	incrementedValue (double value, int stepCount) const
	Calculate incremented value (English only)

Protected 成员函数继承自 QwtAbstractScale
void	rescale (double lowerBound, double upperBound, double stepSize)
	Recalculate scale and update scale draw (English only)

void	setAbstractScaleDraw (QwtAbstractScaleDraw *)
	Set the scale draw object (English only)

const QwtAbstractScaleDraw *	abstractScaleDraw () const
	Return the scale draw (const version) (English only)

QwtAbstractScaleDraw *	abstractScaleDraw ()
	Return the scale draw (non-const version) (English only)

void	updateScaleDraw ()
	Update the scale draw (English only)

属性
KnobStyle	knobStyle

int	knobWidth

Qt::Alignment	alignment

double	totalAngle

int	numTurns

MarkerStyle	markerStyle

int	markerSize

int	borderWidth

属性继承自 QwtAbstractSlider
double	value

uint	totalSteps

uint	singleSteps

uint	pageSteps

bool	stepAlignment

bool	readOnly

bool	tracking

bool	wrapping

bool	invertedControls

属性继承自 QwtAbstractScale
double	lowerBound

double	upperBound

int	scaleMaxMajor

int	scaleMaxMinor

double	scaleStepSize

额外继承的成员函数
Public 槽继承自 QwtAbstractSlider
void	setValue (double value)
	Set the slider value (English only)

信号继承自 QwtAbstractSlider
void	valueChanged (double value)
	通知值变化

void	sliderPressed ()
	当用户按下滑块的可移动部分时发出的信号

void	sliderReleased ()
	当用户释放滑块的可移动部分时发出的信号

void	sliderMoved (double value)
	当用户用鼠标移动滑块时发出的信号

详细描述

旋钮控件

成员枚举类型说明

◆ KnobStyle

enum QwtKnob::KnobStyle

旋钮表面样式

枚举值
Flat	Fill the knob with a brush from QPalette::Button
Raised	Build a gradient from QPalette::Midlight and QPalette::Button
Sunken	Build a gradient from QPalette::Midlight, QPalette::Button and QPalette::Midlight
Styled	Build a radial gradient from QPalette::Button like QDial in various Qt styles

◆ MarkerStyle

enum QwtKnob::MarkerStyle

标记类型

枚举值
NoMarker	Don't paint any marker
Tick	Paint a single tick in QPalette::ButtonText color
Triangle	Paint a triangle in QPalette::ButtonText color
Dot	Paint a circle in QPalette::ButtonText color
Nub	Draw a raised ellipse with a gradient from QPalette::Light and QPalette::Mid
Notch	Draw a sunken ellipse with a gradient from QPalette::Light and QPalette::Mid

构造及析构函数说明

◆ QwtKnob()

QwtKnob::QwtKnob ( QWidget * parent = nullptr )

explicit

Constructor

构造函数

成员函数说明

◆ alignment()

Qt::Alignment QwtKnob::alignment ( ) const

Return alignment of the knob

返回旋钮在 contentsRect() 内的对齐方式

◆ changeEvent()

void QwtKnob::changeEvent ( QEvent * event )

overrideprotectedvirtual

Handle QEvent::StyleChange and QEvent::FontChange;

参数

event Change event

重载 QwtAbstractScale .

◆ drawFocusIndicator()

void QwtKnob::drawFocusIndicator ( QPainter * painter ) const

protectedvirtual

Draw the focus indicator

参数

painter Painter

◆ drawKnob()

void QwtKnob::drawKnob	(	QPainter *	painter,
		const QRectF &	knobRect
	)		const

protectedvirtual

Draw the knob

参数

painter	painter
knobRect	Bounding rectangle of the knob (without scale)

◆ drawMarker()

void QwtKnob::drawMarker	(	QPainter *	painter,
		const QRectF &	rect,
		double	angle
	)		const

protectedvirtual

Draw the marker at the knob's front

参数

painter	Painter
rect	Bounding rectangle of the knob without scale
angle	Angle of the marker in degrees ( clockwise, 0 at the 12 o'clock position )

◆ isScrollPosition()

bool QwtKnob::isScrollPosition ( const QPoint & pos ) const

overrideprotectedvirtual

Determine what to do when the user presses a mouse button.

参数

pos	Mouse position

返回值

True,when pos is inside the circle of the knob.

参见: scrolledTo()

实现了 QwtAbstractSlider.

◆ knobRect()

QRect QwtKnob::knobRect ( ) const

Return the bounding rectangle of the knob

计算不含刻度的旋钮边界矩形

◆ knobStyle()

QwtKnob::KnobStyle QwtKnob::knobStyle ( ) const

Return the knob style

返回旋钮样式

◆ knobWidth()

int QwtKnob::knobWidth ( ) const

Return the knob's width

Return the width of the knob

◆ markerSize()

int QwtKnob::markerSize ( ) const

Return the marker size

返回标记大小

◆ markerStyle()

QwtKnob::MarkerStyle QwtKnob::markerStyle ( ) const

Return the marker style

返回标记样式

◆ minimumSizeHint()

QSize QwtKnob::minimumSizeHint ( ) const

overridevirtual

Return minimum size hint

返回最小大小提示

◆ numTurns()

int QwtKnob::numTurns ( ) const

Return the number of turns

返回圈数

◆ paintEvent()

void QwtKnob::paintEvent ( QPaintEvent * event )

overrideprotectedvirtual

Repaint the knob

参数

event Paint event

◆ scaleDraw() [1/2]

QwtRoundScaleDraw * QwtKnob::scaleDraw ( )

Return the scale draw (non-const version)

返回旋钮的刻度绘制器 (非 const 版本)

◆ scaleDraw() [2/2]

const QwtRoundScaleDraw * QwtKnob::scaleDraw ( ) const

Return the scale draw (const version)

返回旋钮的刻度绘制器 (const 版本)

◆ scrolledTo()

double QwtKnob::scrolledTo ( const QPoint & pos ) const

overrideprotectedvirtual

Determine the value for a new position of the mouse

参数

pos	Mouse position

返回: Value for the mouse position

参见: isScrollPosition()

实现了 QwtAbstractSlider.

◆ setAlignment()

void QwtKnob::setAlignment ( Qt::Alignment alignment )

Set alignment of the knob inside contentsRect()

设置旋钮的对齐方式

◆ setBorderWidth()

void QwtKnob::setBorderWidth ( int borderWidth )

Set the border width

设置旋钮边框宽度

◆ setKnobStyle()

void QwtKnob::setKnobStyle ( KnobStyle knobStyle )

Set the knob style

设置旋钮类型

◆ setKnobWidth()

void QwtKnob::setKnobWidth ( int width )

Set the knob's width (diameter)

更改旋钮宽度

◆ setMarkerSize()

void QwtKnob::setMarkerSize ( int size )

Set the marker size

设置标记大小

◆ setMarkerStyle()

void QwtKnob::setMarkerStyle ( MarkerStyle markerStyle )

Set the marker style

设置旋钮的标记类型

◆ setNumTurns()

void QwtKnob::setNumTurns ( int numTurns )

Set the number of turns for the knob

设置圈数

◆ setScaleDraw()

void QwtKnob::setScaleDraw ( QwtRoundScaleDraw * scaleDraw )

Set the scale draw

更改旋钮的刻度绘制器

◆ setTotalAngle()

void QwtKnob::setTotalAngle ( double angle )

Set the total angle which the knob can be turned

设置旋钮可转动的总角度

◆ sizeHint()

QSize QwtKnob::sizeHint ( ) const

overridevirtual

Return size hint

返回大小提示

◆ totalAngle()

double QwtKnob::totalAngle ( ) const

Return the total angle

返回总角度

该类的文档由以下文件生成:

/home/runner/work/QWT/QWT/src/plot/qwt_knob.h
/home/runner/work/QWT/QWT/src/plot/qwt_knob.cpp

类

Public 类型

Public 成员函数

Protected 成员函数

属性

额外继承的成员函数

详细描述

成员枚举类型说明

◆ KnobStyle

◆ MarkerStyle

构造及析构函数说明

◆ QwtKnob()

成员函数说明

◆ alignment()

◆ changeEvent()

◆ drawFocusIndicator()

◆ drawKnob()

◆ drawMarker()

◆ isScrollPosition()

◆ knobRect()

◆ knobStyle()

◆ knobWidth()

◆ markerSize()

◆ markerStyle()

◆ minimumSizeHint()

◆ numTurns()

◆ paintEvent()

◆ scaleDraw() [1/2]

◆ scaleDraw() [2/2]

◆ scrolledTo()

◆ setAlignment()

◆ setBorderWidth()

◆ setKnobStyle()

◆ setKnobWidth()

◆ setMarkerSize()

◆ setMarkerStyle()

◆ setNumTurns()

◆ setScaleDraw()

◆ setTotalAngle()

◆ sizeHint()

◆ totalAngle()