QwtCounter Class Reference

The Counter Widget. More...

#include <qwt_counter.h>

Inheritance diagram for QwtCounter:

Classes
class	PrivateData

Public Types
enum	Button { Button1 , Button2 , Button3 , ButtonCnt }
	Button index . More...

Public Slots
void	setValue (double)
	Set a new value without adjusting to the step raster.

Signals
void	buttonReleased (double value)
	Signal emitted when a button has been released.
void	valueChanged (double value)
	Signal emitted when the counter's value has changed.

Public Member Functions
	QwtCounter (QWidget *parent=nullptr)
	Constructor.
virtual	~QwtCounter ()
	Destructor.
void	setValid (bool)
	Set the counter to be in valid/invalid state.
bool	isValid () const
	Return true if the value is valid.
void	setWrapping (bool)
	Enable or disable wrapping.
bool	wrapping () const
	Return true if wrapping is enabled.
bool	isReadOnly () const
	Return true if the counter is read only.
void	setReadOnly (bool)
	Set the counter to read only mode.
void	setNumButtons (int)
	Set the number of buttons on each side.
int	numButtons () const
	Return the number of buttons.
void	setIncSteps (QwtCounter::Button, int numSteps)
	Set the number of increment steps for a button.
int	incSteps (QwtCounter::Button) const
	Return the number of increment steps for a button.
virtual QSize	sizeHint () const override
	Return a size hint.
double	singleStep () const
	Return the single step size.
void	setSingleStep (double stepSize)
	Set the single step size.
void	setRange (double min, double max)
	Set the range of the counter.
double	minimum () const
	Return the minimum value.
void	setMinimum (double)
	Set the minimum value.
double	maximum () const
	Return the maximum value.
void	setMaximum (double)
	Set the maximum value.
void	setStepButton1 (int nSteps)
	Set the number of increment steps for button 1.
int	stepButton1 () const
	Return the number of increment steps for button 1.
void	setStepButton2 (int nSteps)
	Set the number of increment steps for button 2.
int	stepButton2 () const
	Return the number of increment steps for button 2.
void	setStepButton3 (int nSteps)
	Set the number of increment steps for button 3.
int	stepButton3 () const
	Return the number of increment steps for button 3.
double	value () const
	Return the current value.

Protected Member Functions
virtual bool	event (QEvent *) override
	Handle QEvent::PolishRequest events.
virtual void	wheelEvent (QWheelEvent *) override
	Handle wheel events.
virtual void	keyPressEvent (QKeyEvent *) override
	Handle key events.

Properties
double	value
double	minimum
double	maximum
double	singleStep
int	numButtons
int	stepButton1
int	stepButton2
int	stepButton3
bool	readOnly
bool	wrapping

Detailed Description

The Counter Widget.

Member Enumeration Documentation

Button

enum QwtCounter::Button

Button index .

Enumerator
Button1	Button intended for minor steps.
Button2	Button intended for medium steps.
Button3	Button intended for large steps.
ButtonCnt	Number of buttons.

Constructor & Destructor Documentation

QwtCounter()

QwtCounter::QwtCounter ( QWidget *  parent = nullptr )

explicit

Constructor.

~QwtCounter()

QwtCounter::~QwtCounter ( )

virtual

Destructor.

Destructor .

Member Function Documentation

buttonReleased

void QwtCounter::buttonReleased ( double  value )

signal

Signal emitted when a button has been released.

event()

bool QwtCounter::event ( QEvent *  event )

overrideprotectedvirtual

Handle QEvent::PolishRequest events.

Parameters

event

Event

Returns

see QWidget::event()

incSteps()

int QwtCounter::incSteps

(

QwtCounter::Button

button

)

const

Return the number of increment steps for a button.

Return the number of steps by which a specified button increments the value, or 0 if the button is invalid.

isReadOnly()

bool QwtCounter::isReadOnly

(

)

const

Return true if the counter is read only.

Return true when the line edit is read only.

isValid()

bool QwtCounter::isValid

(

)

const

Return true if the value is valid.

keyPressEvent()

void QwtCounter::keyPressEvent ( QKeyEvent *  event )

overrideprotectedvirtual

Handle key events.

• Ctrl + Qt::Key_Home
  Step to minimum()
• Ctrl + Qt::Key_End
  Step to maximum()
• Qt::Key_Up
  Increment by incSteps(QwtCounter::Button1)
• Qt::Key_Down
  Decrement by incSteps(QwtCounter::Button1)
• Qt::Key_PageUp
  Increment by incSteps(QwtCounter::Button2)
• Qt::Key_PageDown
  Decrement by incSteps(QwtCounter::Button2)
• Shift + Qt::Key_PageUp
  Increment by incSteps(QwtCounter::Button3)
• Shift + Qt::Key_PageDown
  Decrement by incSteps(QwtCounter::Button3)

Parameters

event

Key event

maximum()

double QwtCounter::maximum

(

)

const

Return the maximum value.

Return the maximum of the range.

minimum()

double QwtCounter::minimum

(

)

const

Return the minimum value.

Return the minimum of the range.

numButtons()

int QwtCounter::numButtons

(

)

const

Return the number of buttons.

Return the number of buttons on each side of the widget.

setIncSteps()

void QwtCounter::setIncSteps	(	QwtCounter::Button	button,
		int	numSteps
	)

Set the number of increment steps for a button.

Specify the number of steps by which the value is incremented or decremented when a specified button is pushed.

setMaximum()

void QwtCounter::setMaximum

(

double

value

)

Set the maximum value.

Set the maximum value of the range.

setMinimum()

void QwtCounter::setMinimum

(

double

value

)

Set the minimum value.

Set the minimum value of the range.

setNumButtons()

void QwtCounter::setNumButtons

(

int

numButtons

)

Set the number of buttons on each side.

Specify the number of buttons on each side of the label.

setRange()

void QwtCounter::setRange	(	double	min,
		double	max
	)

Set the range of the counter.

Set the minimum and maximum values.

setReadOnly()

void QwtCounter::setReadOnly

(

bool

on

)

Set the counter to read only mode.

Allow/disallow the user to manually edit the value.

setSingleStep()

void QwtCounter::setSingleStep

(

double

stepSize

)

Set the single step size.

Set the step size of the counter.

setStepButton1()

void QwtCounter::setStepButton1

(

int

nSteps

)

Set the number of increment steps for button 1.

setStepButton2()

void QwtCounter::setStepButton2

(

int

nSteps

)

Set the number of increment steps for button 2.

setStepButton3()

void QwtCounter::setStepButton3

(

int

nSteps

)

Set the number of increment steps for button 3.

setValid()

void QwtCounter::setValid

(

bool

on

)

Set the counter to be in valid/invalid state.

setValue

void QwtCounter::setValue ( double  value )

slot

Set a new value without adjusting to the step raster.

setWrapping()

void QwtCounter::setWrapping

(

bool

on

)

Enable or disable wrapping.

Enable/disable wrapping.

singleStep()

double QwtCounter::singleStep

(

)

const

Return the single step size.

Return single step size.

sizeHint()

QSize QwtCounter::sizeHint ( ) const

overridevirtual

Return a size hint.

Return a size hint .

stepButton1()

int QwtCounter::stepButton1

(

)

const

Return the number of increment steps for button 1.

stepButton2()

int QwtCounter::stepButton2

(

)

const

Return the number of increment steps for button 2.

stepButton3()

int QwtCounter::stepButton3

(

)

const

Return the number of increment steps for button 3.

value()

double QwtCounter::value

(

)

const

Return the current value.

Return current value of the counter.

valueChanged

void QwtCounter::valueChanged ( double  value )

signal

Signal emitted when the counter's value has changed.

wheelEvent()

void QwtCounter::wheelEvent ( QWheelEvent *  event )

overrideprotectedvirtual

Handle wheel events.

Parameters

event

Wheel event

wrapping()

bool QwtCounter::wrapping

(

)

const

Return true if wrapping is enabled.

Return true when wrapping is set.

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

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