The Slider Widget 更多...

#include <qwt_slider.h>

类 QwtSlider 继承关系图:

类
class	PrivateData

Public 类型
enum	ScalePosition { NoScale , LeadingScale , TrailingScale }
	Position of the scale 更多...

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

	QwtSlider (Qt::Orientation, QWidget *parent=nullptr)
	Constructor with orientation

	~QwtSlider () override
	Destructor

void	setOrientation (Qt::Orientation)
	Set orientation

Qt::Orientation	orientation () const
	Return orientation

void	setScalePosition (ScalePosition)
	Set scale position

ScalePosition	scalePosition () const
	Return scale position

void	setTrough (bool)
	Enable/disable trough

bool	hasTrough () const
	Check if has trough

void	setGroove (bool)
	Enable/disable groove

bool	hasGroove () const
	Check if has groove

void	setHandleSize (const QSize &)
	Set handle size

QSize	handleSize () const
	Return handle size

void	setBorderWidth (int)
	Set border width

int	borderWidth () const
	Return border width

void	setSpacing (int)
	Set spacing

int	spacing () const
	Return spacing

void	setFlatStyle (bool)
	Set flat style

bool	flatStyle () const
	Return flat style

virtual QSize	sizeHint () const override
	Return size hint

virtual QSize	minimumSizeHint () const override
	Return minimum size hint

void	setScaleDraw (QwtScaleDraw *)
	Set scale draw

const QwtScaleDraw *	scaleDraw () const
	Return scale draw (const version)

void	setUpdateInterval (int)
	Set update interval

int	updateInterval () const
	Return update interval

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

	~QwtAbstractSlider () override
	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)
	Constructor for QwtAbstractScale

void	setScale (double lowerBound, double upperBound)
	Specify a scale by interval bounds

void	setScale (const QwtInterval &)
	Specify a scale by interval

void	setScale (const QwtScaleDiv &)
	Specify a scale by scale division

const QwtScaleDiv &	scaleDiv () const
	Return the scale division

void	setLowerBound (double value)
	Set the lower bound of the scale

double	lowerBound () const
	Return the lower bound of the scale

void	setUpperBound (double value)
	Set the upper bound of the scale

double	upperBound () const
	Return the upper bound of the scale

void	setScaleStepSize (double stepSize)
	Set the step size used for calculating scale division

double	scaleStepSize () const
	Return the step size hint

void	setScaleMaxMajor (int ticks)
	Set the maximum number of major tick intervals

int	scaleMaxMinor () const
	Return the maximum number of minor tick intervals

void	setScaleMaxMinor (int ticks)
	Set the maximum number of minor tick intervals

int	scaleMaxMajor () const
	Return the maximum number of major tick intervals

void	setScaleEngine (QwtScaleEngine *)
	Set the scale engine

const QwtScaleEngine *	scaleEngine () const
	Return the scale engine (const version)

QwtScaleEngine *	scaleEngine ()
	Return the scale engine (non-const version)

int	transform (double) const
	Transform a scale value to widget coordinates

double	invTransform (int) const
	Transform a widget coordinate to scale value

bool	isInverted () const
	Check if scale is inverted

double	minimum () const
	Return the minimum boundary

double	maximum () const
	Return the maximum boundary

const QwtScaleMap &	scaleMap () const
	Return the scale map

Protected 成员函数
virtual double	scrolledTo (const QPoint &) const override
	Calculate scrolled position

virtual bool	isScrollPosition (const QPoint &) const override
	Check if position is scroll position

virtual void	drawSlider (QPainter *, const QRect &) const
	Draw slider

virtual void	drawHandle (QPainter *, const QRect &, int pos) const
	Draw handle

virtual void	mousePressEvent (QMouseEvent *) override
	Mouse press event

virtual void	mouseReleaseEvent (QMouseEvent *) override
	Mouse release event

virtual void	resizeEvent (QResizeEvent *) override
	Resize event

virtual void	paintEvent (QPaintEvent *) override
	Paint event

virtual void	changeEvent (QEvent *) override
	Change event

virtual void	timerEvent (QTimerEvent *) override
	Timer event

virtual bool	event (QEvent *) override
	Event handler

virtual void	scaleChange () override
	Scale change notification

QRect	sliderRect () const
	Return slider rectangle

QRect	handleRect () const
	Return handle rectangle

Protected 成员函数继承自 QwtAbstractSlider
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	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
Qt::Orientation	orientation

ScalePosition	scalePosition

bool	trough

bool	groove

QSize	handleSize

int	borderWidth

int	spacing

bool	flatStyle

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)
	Notify a change of value

void	sliderPressed ()
	Signal emitted when the user presses the movable part of the slider

void	sliderReleased ()
	Signal emitted when the user releases the movable part of the slider

void	sliderMoved (double value)
	Signal emitted when the user moves the slider with the mouse

详细描述

The Slider Widget

QwtSlider is a slider widget which operates on an interval of type double. Its position is related to a scale showing the current value. The slider can be customized by having a through, a groove - or both.

成员枚举类型说明

◆ ScalePosition

enum QwtSlider::ScalePosition

Position of the scale

参见: QwtSlider(), setScalePosition(), setOrientation()

枚举值
NoScale	The slider has no scale
LeadingScale	The scale is right of a vertical or below a horizontal slider
TrailingScale	The scale is left of a vertical or above a horizontal slider

构造及析构函数说明

◆ QwtSlider() [1/2]

QwtSlider::QwtSlider ( QWidget * parent = nullptr )

explicit

Constructor

Construct vertical slider in QwtSlider::Trough style

Construct vertical slider in QwtSlider::Trough style with a scale to the left. The scale is initialized to [0.0, 100.0] and the value set to 0.0.

参数

parent Parent widget

参见: setOrientation(), setScalePosition()

◆ QwtSlider() [2/2]

QwtSlider::QwtSlider	(	Qt::Orientation	orientation,
		QWidget *	parent = `nullptr`
	)

explicit

Constructor with orientation

Construct a slider in QwtSlider::Trough style

Construct a slider in QwtSlider::Trough style. When orientation is Qt::Vertical the scale will be aligned to the left, otherwise at the top of the slider. The scale is initialized to [0.0, 100.0] and the value set to 0.0.

参数

parent	Parent widget
orientation	Orientation of the slider

参见: setOrientation(), setScalePosition()

◆ ~QwtSlider()

QwtSlider::~QwtSlider ( )

override

Destructor

参见: QwtSlider()

成员函数说明

◆ borderWidth()

int QwtSlider::borderWidth ( ) const

Return border width

Return the border width

参见: setBorderWidth()

◆ changeEvent()

void QwtSlider::changeEvent ( QEvent * event )

overrideprotectedvirtual

Change event

重载 QwtAbstractScale .

◆ flatStyle()

bool QwtSlider::flatStyle ( ) const

Return flat style

Return whether flat style is enabled

参见: setFlatStyle()

◆ handleSize()

QSize QwtSlider::handleSize ( ) const

Return handle size

Return size of the handle

参见: setHandleSize()

◆ hasGroove()

bool QwtSlider::hasGroove ( ) const

Check if has groove

Return true when the groove is visible

参见: setGroove(), hasTrough()

◆ hasTrough()

bool QwtSlider::hasTrough ( ) const

Check if has trough

Return true when the trough is visible

参见: setTrough(), hasGroove()

◆ isScrollPosition()

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

overrideprotectedvirtual

Check if position is scroll position

实现了 QwtAbstractSlider.

◆ minimumSizeHint()

QSize QwtSlider::minimumSizeHint ( ) const

overridevirtual

Return minimum size hint

参见: sizeHint()

◆ mousePressEvent()

void QwtSlider::mousePressEvent ( QMouseEvent * event )

overrideprotectedvirtual

Mouse press event

重载 QwtAbstractSlider .

◆ mouseReleaseEvent()

void QwtSlider::mouseReleaseEvent ( QMouseEvent * event )

overrideprotectedvirtual

Mouse release event

重载 QwtAbstractSlider .

◆ orientation()

Qt::Orientation QwtSlider::orientation ( ) const

Return orientation

参见: setOrientation()

◆ scaleChange()

void QwtSlider::scaleChange ( )

overrideprotectedvirtual

Scale change notification

重载 QwtAbstractSlider .

◆ scaleDraw()

const QwtScaleDraw * QwtSlider::scaleDraw ( ) const

Return scale draw (const version)

Return the scale draw of the slider (const version)

参见: setScaleDraw()

◆ scalePosition()

QwtSlider::ScalePosition QwtSlider::scalePosition ( ) const

Return scale position

Return position of the scale

参见: setScalePosition()

◆ scrolledTo()

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

overrideprotectedvirtual

Calculate scrolled position

实现了 QwtAbstractSlider.

◆ setBorderWidth()

void QwtSlider::setBorderWidth ( int width )

Set border width

Change the slider's border width

The border width is used for drawing the slider handle and the trough.

参数

width Border width

参见: borderWidth()

◆ setFlatStyle()

void QwtSlider::setFlatStyle ( bool on )

Set flat style

When enabled (default), the slider is drawn with flat colors instead of 3D embossed effects (qDrawShadePanel/qDrawShadeLine).

参数

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

参见: flatStyle()

◆ setGroove()

void QwtSlider::setGroove ( bool on )

Enable/disable groove

En/Disable the groove

The slider can be customized by showing a groove for the handle.

参数

on	When true, the groove is visible

参见: hasGroove(), setTrough()

◆ setHandleSize()

void QwtSlider::setHandleSize ( const QSize & size )

Set handle size

Set the slider's handle size

When the size is empty the slider handle will be painted with a default size depending on its orientation().

参数

size New size

参见: handleSize()

◆ setOrientation()

void QwtSlider::setOrientation ( Qt::Orientation orientation )

Set orientation

Set the orientation

参数

orientation Allowed values are Qt::Horizontal and Qt::Vertical

参见: orientation(), scalePosition()

◆ setScaleDraw()

void QwtSlider::setScaleDraw ( QwtScaleDraw * scaleDraw )

Set scale draw

Set a scale draw

For changing the labels of the scales, it is necessary to derive from QwtScaleDraw and overload QwtScaleDraw::label().

参数

scaleDraw ScaleDraw object that has to be created with new and will be deleted in ~QwtSlider() or the next call of setScaleDraw()

参见: scaleDraw()

◆ setScalePosition()

void QwtSlider::setScalePosition ( ScalePosition scalePosition )

Set scale position

Change the position of the scale

参数

scalePosition Position of the scale

参见: ScalePosition, scalePosition()

◆ setSpacing()

void QwtSlider::setSpacing ( int spacing )

Set spacing

Change the spacing between trough and scale

A spacing of 0 means that the backbone of the scale is covered by the trough. The default setting is 4 pixels.

参数

spacing Number of pixels

参见: spacing()

◆ setTrough()

void QwtSlider::setTrough ( bool on )

Enable/disable trough

En/Disable the trough

The slider can be customized by showing a trough for the handle.

参数

on	When true, the trough is visible

参见: hasTrough(), setGroove()

◆ setUpdateInterval()

void QwtSlider::setUpdateInterval ( int interval )

Set update interval

Specify the update interval for automatic scrolling

The minimal accepted value is 50 ms.

参数

interval Update interval in milliseconds

参见: updateInterval()

◆ sizeHint()

QSize QwtSlider::sizeHint ( ) const

overridevirtual

Return size hint

返回: minimumSizeHint()

参见: minimumSizeHint()

◆ spacing()

int QwtSlider::spacing ( ) const

Return spacing

Return number of pixels between slider and scale

参见: setSpacing()

◆ updateInterval()

int QwtSlider::updateInterval ( ) const

Return update interval

Return update interval in milliseconds for automatic scrolling

参见: setUpdateInterval()

该类的文档由以下文件生成:

/home/runner/work/QWT/QWT/src/plot/qwt_slider.h
/home/runner/work/QWT/QWT/src/plot/qwt_slider.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

◆ ScalePosition

构造及析构函数说明

◆ QwtSlider() [1/2]

◆ QwtSlider() [2/2]

◆ ~QwtSlider()

成员函数说明

◆ borderWidth()

◆ changeEvent()

◆ flatStyle()

◆ handleSize()

◆ hasGroove()

◆ hasTrough()

◆ isScrollPosition()

◆ minimumSizeHint()

◆ mousePressEvent()

◆ mouseReleaseEvent()

◆ orientation()

◆ scaleChange()

◆ scaleDraw()

◆ scalePosition()

◆ scrolledTo()

◆ setBorderWidth()

◆ setFlatStyle()

◆ setGroove()

◆ setHandleSize()

◆ setOrientation()

◆ setScaleDraw()

◆ setScalePosition()

◆ setSpacing()

◆ setTrough()

◆ setUpdateInterval()

◆ sizeHint()

◆ spacing()

◆ updateInterval()