QwtSlider Class Reference

The Slider Widget. More...

#include <qwt_slider.h>

Inheritance diagram for QwtSlider:

Classes
class	PrivateData

Public Types
enum	ScalePosition { NoScale , LeadingScale , TrailingScale }
	Position of the scale. More...

Public Member Functions
	QwtSlider (QWidget *parent=nullptr)
	Constructor.
	QwtSlider (Qt::Orientation, QWidget *parent=nullptr)
	Constructor with orientation.
virtual	~QwtSlider ()
	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.
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 Member Functions inherited from 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 Member Functions inherited from QwtAbstractScale
	QwtAbstractScale (QWidget *parent=nullptr)
	Constructor for QwtAbstractScale.
virtual	~QwtAbstractScale ()
	Destructor 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 Member Functions
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 Member Functions inherited from 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 Member Functions inherited from 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)

Properties
Qt::Orientation	orientation
ScalePosition	scalePosition
bool	trough
bool	groove
QSize	handleSize
int	borderWidth
int	spacing
Properties inherited from QwtAbstractSlider
double	value
uint	totalSteps
uint	singleSteps
uint	pageSteps
bool	stepAlignment
bool	readOnly
bool	tracking
bool	wrapping
bool	invertedControls
Properties inherited from QwtAbstractScale
double	lowerBound
double	upperBound
int	scaleMaxMajor
int	scaleMaxMinor
double	scaleStepSize

Additional Inherited Members
Public Slots inherited from QwtAbstractSlider
void	setValue (double value)
	Set the slider value (English only)
Signals inherited from 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.

Detailed Description

The Slider Widget.

Member Enumeration Documentation

ScalePosition

enum QwtSlider::ScalePosition

Position of the scale.

Enumerator
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.

Constructor & Destructor Documentation

QwtSlider() [1/2]

QwtSlider::QwtSlider ( QWidget *  parent = nullptr )

explicit

Constructor.

Construct vertical slider in QwtSlider::Trough style.

QwtSlider() [2/2]

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

explicit

Constructor with orientation.

Construct a slider in QwtSlider::Trough style.

~QwtSlider()

QwtSlider::~QwtSlider ( )

virtual

Destructor.

Member Function Documentation

borderWidth()

int QwtSlider::borderWidth

(

)

const

Return border width.

Return the border width.

changeEvent()

void QwtSlider::changeEvent ( QEvent *  event )

overrideprotectedvirtual

Change event.

Reimplemented from QwtAbstractScale.

handleSize()

QSize QwtSlider::handleSize

(

)

const

Return handle size.

Return size of the handle.

hasGroove()

bool QwtSlider::hasGroove

(

)

const

Check if has groove.

Return true when the groove is visible.

hasTrough()

bool QwtSlider::hasTrough

(

)

const

Check if has trough.

Return true when the trough is visible.

isScrollPosition()

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

overrideprotectedvirtual

Check if position is scroll position.

Implements QwtAbstractSlider.

minimumSizeHint()

QSize QwtSlider::minimumSizeHint ( ) const

overridevirtual

Return minimum size hint.

mousePressEvent()

void QwtSlider::mousePressEvent ( QMouseEvent *  event )

overrideprotectedvirtual

Mouse press event.

Reimplemented from QwtAbstractSlider.

mouseReleaseEvent()

void QwtSlider::mouseReleaseEvent ( QMouseEvent *  event )

overrideprotectedvirtual

Mouse release event.

Reimplemented from QwtAbstractSlider.

orientation()

Qt::Orientation QwtSlider::orientation

(

)

const

Return orientation.

scaleChange()

void QwtSlider::scaleChange ( )

overrideprotectedvirtual

Scale change notification.

Reimplemented from QwtAbstractSlider.

scaleDraw()

const QwtScaleDraw * QwtSlider::scaleDraw

(

)

const

Return scale draw (const version)

Return the scale draw of the slider (const version)

scalePosition()

QwtSlider::ScalePosition QwtSlider::scalePosition

(

)

const

Return scale position.

Return position of the scale.

scrolledTo()

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

overrideprotectedvirtual

Calculate scrolled position.

Implements QwtAbstractSlider.

setBorderWidth()

void QwtSlider::setBorderWidth

(

int

width

)

Set border width.

Change the slider's border width.

setGroove()

void QwtSlider::setGroove

(

bool

on

)

Enable/disable groove.

En/Disable the groove.

setHandleSize()

void QwtSlider::setHandleSize

(

const QSize &

size

)

Set handle size.

Set the slider's handle size.

setOrientation()

void QwtSlider::setOrientation

(

Qt::Orientation

orientation

)

Set orientation.

Set the orientation.

setScaleDraw()

void QwtSlider::setScaleDraw

(

QwtScaleDraw *

scaleDraw

)

Set scale draw.

Set a scale draw.

setScalePosition()

void QwtSlider::setScalePosition

(

ScalePosition

scalePosition

)

Set scale position.

Change the position of the scale.

setSpacing()

void QwtSlider::setSpacing

(

int

spacing

)

Set spacing.

Change the spacing between trough and scale.

setTrough()

void QwtSlider::setTrough

(

bool

on

)

Enable/disable trough.

En/Disable the trough.

setUpdateInterval()

void QwtSlider::setUpdateInterval

(

int

interval

)

Set update interval.

Specify the update interval for automatic scrolling.

sizeHint()

QSize QwtSlider::sizeHint ( ) const

overridevirtual

Return size hint.

spacing()

int QwtSlider::spacing

(

)

const

Return spacing.

Return number of pixels between slider and scale.

updateInterval()

int QwtSlider::updateInterval

(

)

const

Return update interval.

Return update interval in milliseconds for automatic scrolling.

---

The documentation for this class was generated from the following files:

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