The QSpinBox class provides a spin box widget. More...

Inheritance diagram for QSpinBox:

Public Signals
void	valueChanged (const QString &text)

void	valueChanged (int newValue)

Public Signals inherited from QAbstractSpinBox
void	editingFinished ()

Public Signals inherited from QWidget
void	customContextMenuRequested (const QPoint &pos)

void	windowIconChanged (const QIcon &icon)

void	windowIconTextChanged (const QString &iconText)

void	windowTitleChanged (const QString &title)

Public Signals inherited from QObject
void	destroyed (QObject *obj=nullptr)

void	objectNameChanged (const QString &objectName)

Public Slots
void	setValue (int val)

Public Slots inherited from QAbstractSpinBox
virtual void	clear ()

void	selectAll ()

void	stepDown ()

void	stepUp ()

Public Slots inherited from QWidget
bool	close ()

void	hide ()

void	lower ()

void	raise ()

void	repaint ()

void	setDisabled (bool disable)

void	setEnabled (bool enable)

void	setFocus ()

void	setHidden (bool hidden)

void	setStyleSheet (const QString &styleSheet)

virtual void	setVisible (bool visible)

void	setWindowModified (bool modified)

void	setWindowTitle (const QString &title)

void	show ()

void	showFullScreen ()

void	showMaximized ()

void	showMinimized ()

void	showNormal ()

void	update ()

Public Slots inherited from QObject
void	deleteLater ()

Public Methods
	QSpinBox (QWidget *parent=nullptr)

QString	cleanText () const

int	displayIntegerBase () const

int	maximum () const

int	minimum () const

QString	prefix () const

void	setDisplayIntegerBase (int base)

void	setMaximum (int max)

void	setMinimum (int min)

void	setPrefix (const QString &prefix)

void	setRange (int min, int max)

void	setSingleStep (int val)

void	setSuffix (const QString &suffix)

int	singleStep () const

QString	suffix () const

int	value () const

Public Methods inherited from QAbstractSpinBox
	QAbstractSpinBox (QWidget *parent=nullptr)

	~QAbstractSpinBox ()

Qt::Alignment	alignment () const

ButtonSymbols	buttonSymbols () const

CorrectionMode	correctionMode () const

bool	event (QEvent *event) override

bool	hasAcceptableInput () const

bool	hasFrame () const

QVariant	inputMethodQuery (Qt::InputMethodQuery query) const override

void	interpretText ()

bool	isAccelerated () const

bool	isGroupSeparatorShown () const

bool	isReadOnly () const

bool	keyboardTracking () const

QSize	minimumSizeHint () const override

void	setAccelerated (bool on)

void	setAlignment (Qt::Alignment flag)

void	setButtonSymbols (ButtonSymbols symbols)

void	setCorrectionMode (CorrectionMode cm)

void	setFrame (bool enable)

void	setGroupSeparatorShown (bool shown)

void	setKeyboardTracking (bool enable)

void	setReadOnly (bool enable)

void	setSpecialValueText (const QString &txt)

void	setWrapping (bool wrapping)

QSize	sizeHint () const override

QString	specialValueText () const

virtual void	stepBy (int steps)

QString	text () const

bool	wrapping () const

Public Methods inherited from QWidget
	QWidget (QWidget *parent=nullptr, Qt::WindowFlags flags=Qt::EmptyFlag)

	~QWidget ()

bool	acceptDrops () const

QString	accessibleDescription () const

QString	accessibleName () const

QList< QAction * >	actions () const

void	activateWindow ()

void	addAction (QAction *action)

void	addActions (const QList< QAction * > &actions)

void	adjustSize ()

bool	autoFillBackground () const

QPalette::ColorRole	backgroundRole () const

QBackingStore *	backingStore () const

QSize	baseSize () const

QWidget *	childAt (const QPoint &position) const

QWidget *	childAt (int x, int y) const

QRect	childrenRect () const

QRegion	childrenRegion () const

void	clearFocus ()

void	clearMask ()

QMargins	contentsMargins () const

QRect	contentsRect () const

Qt::ContextMenuPolicy	contextMenuPolicy () const

QCursor	cursor () const

WId	effectiveWinId () const

void	ensurePolished () const

Qt::FocusPolicy	focusPolicy () const

QWidget *	focusProxy () const

QWidget *	focusWidget () const

const QFont &	font () const

QFontInfo	fontInfo () const

QFontMetrics	fontMetrics () const

QPalette::ColorRole	foregroundRole () const

QRect	frameGeometry () const

QSize	frameSize () const

const QRect &	geometry () const

void	getContentsMargins (int left, int top, int right, int bottom) const

QPixmap	grab (const QRect &rectangle=QRect (QPoint (0, 0), QSize (-1,-1)))

void	grabGesture (Qt::GestureType gestureType, Qt::GestureFlags flags=Qt::GestureFlags ())

void	grabKeyboard ()

void	grabMouse ()

void	grabMouse (const QCursor &cursor)

int	grabShortcut (const QKeySequence &key, Qt::ShortcutContext context=Qt::WindowShortcut)

QGraphicsEffect *	graphicsEffect () const

QGraphicsProxyWidget *	graphicsProxyWidget () const

bool	hasEditFocus () const

bool	hasFocus () const

virtual bool	hasHeightForWidth () const

bool	hasMouseTracking () const

int	height () const

virtual int	heightForWidth (int width) const

Qt::InputMethodHints	inputMethodHints () const

void	insertAction (QAction before, QAction action)

void	insertActions (QAction before, QList< QAction > actions)

bool	isActiveWindow () const

bool	isAncestorOf (const QWidget *child) const

bool	isEnabled () const

bool	isEnabledTo (const QWidget *parent) const

bool	isEnabledToTLW () const

bool	isFullScreen () const

bool	isHidden () const

bool	isMaximized () const

bool	isMinimized () const

bool	isModal () const

bool	isTopLevel () const

bool	isVisible () const

bool	isVisibleTo (const QWidget *parent) const

bool	isWindow () const

bool	isWindowModified () const

QLayout *	layout () const

Qt::LayoutDirection	layoutDirection () const

QLocale	locale () const

QPoint	mapFrom (const QWidget *parent, const QPoint &pos) const

QPoint	mapFromGlobal (const QPoint &pos) const

QPoint	mapFromParent (const QPoint &pos) const

QPoint	mapTo (const QWidget *parent, const QPoint &pos) const

QPoint	mapToGlobal (const QPoint &pos) const

QPoint	mapToParent (const QPoint &pos) const

QRegion	mask () const

int	maximumHeight () const

QSize	maximumSize () const

int	maximumWidth () const

int	minimumHeight () const

QSize	minimumSize () const

int	minimumWidth () const

void	move (const QPoint &point)

void	move (int x, int y)

QWidget *	nativeParentWidget () const

QWidget *	nextInFocusChain () const

QRect	normalGeometry () const

void	overrideWindowFlags (Qt::WindowFlags flags)

QPaintEngine *	paintEngine () const override

const QPalette &	palette () const

QWidget *	parentWidget () const

QPoint	pos () const

QWidget *	previousInFocusChain () const

QRect	rect () const

void	releaseKeyboard ()

void	releaseMouse ()

void	releaseShortcut (int id)

void	removeAction (QAction *action)

void	render (QPaintDevice *target, const QPoint &targetOffset=QPoint (), const QRegion &sourceRegion=QRegion (), RenderFlags renderFlags=RenderFlags (DrawWindowBackground\|DrawChildren))

void	render (QPainter *painter, const QPoint &targetOffset=QPoint (), const QRegion &sourceRegion=QRegion (), RenderFlags renderFlags=RenderFlags (DrawWindowBackground\|DrawChildren))

void	repaint (const QRect &rect)

void	repaint (const QRegion &region)

void	repaint (int x, int y, int w, int h)

void	resize (const QSize &size)

void	resize (int w, int h)

bool	restoreGeometry (const QByteArray &geometry)

QByteArray	saveGeometry () const

void	scroll (int dx, int dy)

void	scroll (int dx, int dy, const QRect &rect)

void	setAcceptDrops (bool on)

void	setAccessibleDescription (const QString &description)

void	setAccessibleName (const QString &name)

void	setAttribute (Qt::WidgetAttribute attribute, bool enable=true)

void	setAutoFillBackground (bool enable)

void	setBackgroundRole (QPalette::ColorRole role)

void	setBaseSize (const QSize &size)

void	setBaseSize (int basew, int baseh)

void	setContentsMargins (const QMargins &margins)

void	setContentsMargins (int left, int top, int right, int bottom)

void	setContextMenuPolicy (Qt::ContextMenuPolicy policy)

void	setCursor (const QCursor &cursor)

void	setEditFocus (bool enable)

void	setFixedHeight (int h)

void	setFixedSize (const QSize &size)

void	setFixedSize (int w, int h)

void	setFixedWidth (int w)

void	setFocus (Qt::FocusReason reason)

void	setFocusPolicy (Qt::FocusPolicy policy)

void	setFocusProxy (QWidget *widget)

void	setFont (const QFont &font)

void	setForegroundRole (QPalette::ColorRole role)

void	setGeometry (const QRect &rect)

void	setGeometry (int x, int y, int w, int h)

void	setGraphicsEffect (QGraphicsEffect *effect)

void	setInputMethodHints (Qt::InputMethodHints hints)

void	setLayout (QLayout *layout)

void	setLayoutDirection (Qt::LayoutDirection direction)

void	setLocale (const QLocale &locale)

void	setMask (const QBitmap &bitmap)

void	setMask (const QRegion &region)

void	setMaximumHeight (int maxh)

void	setMaximumSize (const QSize &size)

void	setMaximumSize (int maxw, int maxh)

void	setMaximumWidth (int maxw)

void	setMinimumHeight (int minh)

void	setMinimumSize (const QSize &size)

void	setMinimumSize (int minw, int minh)

void	setMinimumWidth (int minw)

void	setMouseTracking (bool enable)

void	setPalette (const QPalette &palette)

void	setParent (QWidget *parent)

void	setParent (QWidget *parent, Qt::WindowFlags flags)

void	setShortcutAutoRepeat (int id, bool enable=true)

void	setShortcutEnabled (int id, bool enable=true)

void	setSizeIncrement (const QSize &size)

void	setSizeIncrement (int w, int h)

void	setSizePolicy (QSizePolicy policy)

void	setSizePolicy (QSizePolicy::Policy horizontal, QSizePolicy::Policy vertical)

void	setStatusTip (const QString &data)

void	setStyle (QStyle *style)

void	setToolTip (const QString &data)

void	setToolTipDuration (int msec)

void	setUpdatesEnabled (bool enable)

void	setWhatsThis (const QString &str)

void	setWindowFilePath (const QString &filePath)

void	setWindowFlags (Qt::WindowFlags flags)

void	setWindowIcon (const QIcon &icon)

void	setWindowModality (Qt::WindowModality windowModality)

void	setWindowOpacity (qreal level)

void	setWindowRole (const QString &role)

void	setWindowState (Qt::WindowStates windowState)

QSize	size () const

QSize	sizeIncrement () const

QSizePolicy	sizePolicy () const

void	stackUnder (QWidget *widget)

QString	statusTip () const

QStyle *	style () const

QString	styleSheet () const

bool	testAttribute (Qt::WidgetAttribute attribute) const

QString	toolTip () const

int	toolTipDuration () const

QWidget *	topLevelWidget () const

bool	underMouse () const

void	ungrabGesture (Qt::GestureType gestureType)

void	unsetCursor ()

void	unsetLayoutDirection ()

void	unsetLocale ()

void	update (const QRect &rect)

void	update (const QRegion &region)

void	update (int x, int y, int w, int h)

void	updateGeometry ()

bool	updatesEnabled () const

QRegion	visibleRegion () const

QString	whatsThis () const

int	width () const

QWidget *	window () const

QString	windowFilePath () const

Qt::WindowFlags	windowFlags () const

QWindow *	windowHandle () const

QIcon	windowIcon () const

Qt::WindowModality	windowModality () const

qreal	windowOpacity () const

QString	windowRole () const

Qt::WindowStates	windowState () const

QString	windowTitle () const

Qt::WindowType	windowType () const

WId	winId () const

int	x () const

int	y () const

Public Methods inherited from QObject
	QObject (QObject *parent=nullptr)

	~QObject ()

bool	blockSignals (bool block)

const QList< QObject * > &	children () const

bool	connect (const QObject *sender, const QString &signalMethod, const QString &location, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)

bool	connect (const QObject *sender, const QString &signalMethod, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)

bool	disconnect (const QObject *receiver, const QString &slotMethod=QString ()) const

bool	disconnect (const QString &signalMethod, const QString &location, const QObject *receiver=nullptr, const QString &slotMethod=QString ()) const

bool	disconnect (const QString &signalMethod=QString (), const QObject *receiver=nullptr, const QString &slotMethod=QString ()) const

void	dumpObjectInfo ()

void	dumpObjectTree ()

QList< QString >	dynamicPropertyNames () const

virtual bool	event (QEvent *event)

virtual bool	eventFilter (QObject watched, QEvent event)

template<typename T >
T	findChild (const QString &childName=QString ()) const

template<class T >
QList< T >	findChildren (const QRegularExpression &regExp, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const

template<class T >
QList< T >	findChildren (const QString &childName=QString (), Qt::FindChildOptions options=Qt::FindChildrenRecursively) const

bool	inherits (const QString &className) const

void	installEventFilter (QObject *filterObj)

bool	isWidgetType () const

bool	isWindowType () const

void	killTimer (int id)

const QMetaObject *	metaObject () const

void	moveToThread (QThread *targetThread)

QString	objectName () const

QObject *	parent () const

template<class T = QVariant>
T	property (const QString &name) const

void	removeEventFilter (QObject *obj)

void	setObjectName (const QString &name)

void	setParent (QObject *parent)

bool	setProperty (const QString &name, const QVariant &value)

bool	signalsBlocked () const

int	startTimer (int interval, Qt::TimerType timerType=Qt::CoarseTimer)

QThread *	thread () const

Public Methods inherited from QPaintDevice
virtual	~QPaintDevice ()

int	colorCount () const

int	depth () const

int	devicePixelRatio () const

qreal	devicePixelRatioF () const

int	height () const

int	heightMM () const

int	logicalDpiX () const

int	logicalDpiY () const

bool	paintingActive () const

int	physicalDpiX () const

int	physicalDpiY () const

int	width () const

int	widthMM () const

Protected Methods
bool	event (QEvent *event) override

void	fixup (QString &input) const override

virtual QString	textFromValue (int value) const

QValidator::State	validate (QString &input, int &pos) const override

virtual int	valueFromText (const QString &text) const

Protected Methods inherited from QAbstractSpinBox
void	changeEvent (QEvent *event) override

void	closeEvent (QCloseEvent *event) override

void	contextMenuEvent (QContextMenuEvent *event) override

void	focusInEvent (QFocusEvent *event) override

void	focusOutEvent (QFocusEvent *event) override

void	hideEvent (QHideEvent *event) override

void	initStyleOption (QStyleOptionSpinBox *option) const

void	keyPressEvent (QKeyEvent *event) override

void	keyReleaseEvent (QKeyEvent *event) override

QLineEdit *	lineEdit () const

void	mouseMoveEvent (QMouseEvent *event) override

void	mousePressEvent (QMouseEvent *event) override

void	mouseReleaseEvent (QMouseEvent *event) override

void	paintEvent (QPaintEvent *event) override

void	resizeEvent (QResizeEvent *event) override

void	setLineEdit (QLineEdit *lineEdit)

void	showEvent (QShowEvent *event) override

virtual StepEnabled	stepEnabled () const

void	timerEvent (QTimerEvent *event) override

void	wheelEvent (QWheelEvent *event) override

Protected Methods inherited from QWidget
virtual void	actionEvent (QActionEvent *event)

void	create (WId window=0, bool initializeWindow=true, bool destroyOldWindow=true)

void	destroy (bool destroyWindow=true, bool destroySubWindows=true)

virtual void	dragEnterEvent (QDragEnterEvent *event)

virtual void	dragLeaveEvent (QDragLeaveEvent *event)

virtual void	dragMoveEvent (QDragMoveEvent *event)

virtual void	dropEvent (QDropEvent *event)

virtual void	enterEvent (QEvent *event)

bool	event (QEvent *event) override

bool	focusNextChild ()

virtual bool	focusNextPrevChild (bool next)

bool	focusPreviousChild ()

void	initPainter (QPainter *painter) const override

virtual void	inputMethodEvent (QInputMethodEvent *event)

virtual void	leaveEvent (QEvent *event)

int	metric (PaintDeviceMetric metric) const override

virtual void	mouseDoubleClickEvent (QMouseEvent *event)

virtual void	moveEvent (QMoveEvent *event)

virtual bool	nativeEvent (const QByteArray &eventType, void message, long result)

virtual void	tabletEvent (QTabletEvent *event)

Protected Methods inherited from QObject
virtual void	childEvent (QChildEvent *event)

virtual void	connectNotify (const QMetaMethod &signalMethod) const

virtual void	customEvent (QEvent *event)

virtual void	disconnectNotify (const QMetaMethod &signalMethod) const

bool	isSignalConnected (const QMetaMethod &signalMethod) const

int	receivers (const QString &signal) const

QObject *	sender () const

int	senderSignalIndex () const

virtual void	timerEvent (QTimerEvent *event)

Protected Methods inherited from QPaintDevice
	QPaintDevice ()

Properties
	cleanText

	displayIntegerBase

	maximum

	minimum

	prefix

	singleStep

	suffix

	value

Properties inherited from QAbstractSpinBox
	accelerated

	acceptableInput

	alignment

	buttonSymbols

	correctionMode

	frame

	keyboardTracking

	readOnly

	specialValueText

	text

	wrapping

Properties inherited from QWidget
	acceptDrops

	accessibleDescription

	accessibleName

	autoFillBackground

	baseSize

	childrenRect

	childrenRegion

	contextMenuPolicy

	cursor

	enabled

	focus

	focusPolicy

	font

	frameGeometry

	frameSize

	fullScreen

	geometry

	height

	inputMethodHints

	isActiveWindow

	layoutDirection

	locale

	maximized

	maximumHeight

	maximumSize

	maximumWidth

	minimized

	minimumHeight

	minimumSize

	minimumSizeHint

	minimumWidth

	modal

	mouseTracking

	normalGeometry

	palette

	pos

	rect

	size

	sizeHint

	sizeIncrement

	sizePolicy

	statusTip

	styleSheet

	toolTip

	updatesEnabled

	visible

	whatsThis

	width

	windowFilePath

	windowFlags

	windowIcon

	windowIconText

	windowModality

	windowModified

	windowOpacity

	windowTitle

	x

	y

Properties inherited from QObject
	objectName

Additional Inherited Members
Public Typedefs inherited from QAbstractSpinBox
using	StepEnabled = QFlags< StepEnabledFlag >

Public Typedefs inherited from QWidget
using	RenderFlags = QFlags< RenderFlag >

Public Types inherited from QAbstractSpinBox
enum	ButtonSymbols

enum	CorrectionMode

enum	StepEnabledFlag

Public Types inherited from QWidget
enum	RenderFlag

Public Types inherited from QPaintDevice
enum	PaintDeviceMetric

Static Public Methods inherited from QWidget
static QWidget *	createWindowContainer (QWindow window, QWidget parent=nullptr, Qt::WindowFlags flags=Qt::EmptyFlag)

static QWidget *	find (WId id)

static QWidget *	keyboardGrabber ()

static QWidget *	mouseGrabber ()

static void	setTabOrder (QWidget firstWidget, QWidget secondWidget)

Static Public Methods inherited from QObject
static bool	connect (const QObject sender, const QMetaMethod &signalMethod, const QObject receiver, const QMetaMethod &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)

static bool	connect (const QObject sender, const QString &signalMethod, const QObject receiver, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection, const QString &location=QString ())

static bool	connect (const QObject sender, const QString &signalMethod, const QString &location, const QObject receiver, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)

template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class SlotClass , class... SlotArgs, class SlotReturn >
static bool	connect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver receiver, SlotReturn (SlotClass::slotMethod)(SlotArgs...), Qt::ConnectionType type=Qt::AutoConnection)

template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class T >
static bool	connect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver *receiver, T slotLambda, Qt::ConnectionType type=Qt::AutoConnection)

static bool	disconnect (const QObject sender, const QMetaMethod &signalMethod, const QObject receiver, const QMetaMethod &slotMethod)

static bool	disconnect (const QObject sender, const QString &signalMethod, const QObject receiver, const QString &slotMethod)

static bool	disconnect (const QObject sender, const QString &signalMethod, const QString &location, const QObject receiver, const QString &slotMethod)

static bool	disconnect (const QObject sender, std::nullptr_t, const QObject receiver, std::nullptr_t)

template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class SlotClass , class... SlotArgs, class SlotReturn >
static bool	disconnect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver receiver, SlotReturn (SlotClass::slotMethod)(SlotArgs...))

template<class Sender , class SignalClass , class... SignalArgs, class Receiver >
static bool	disconnect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver *receiver, std::nullptr_t slotMethod=nullptr)

template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class T >
static bool	disconnect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver *receiver, T slotMethod)

static QMetaObject &	staticMetaObject ()

static QString	tr (const char text, const char comment=nullptr, std::optional< int > numArg=std::optional< int >())

Protected Slots inherited from QWidget
void	updateMicroFocus ()

Related Functions inherited from QWidget
	QWidgetList

	WId

Related Functions inherited from QObject
T	qobject_cast (QObject *object)

	QObjectList

Detailed Description

The QSpinBox class provides a spin box widget designed to handle integers and discrete sets of values like month names. Use QDoubleSpinBox for floating point values.

QSpinBox allows the user to choose a value by clicking the up/down buttons or pressing up/down on the keyboard to increase/decrease the value currently displayed. The user can also type the value in manually. The spin box supports integer values but can be extended to use different strings with validate(), textFromValue() and valueFromText().

Every time the value changes QSpinBox emits the valueChanged() signals. The current value can be fetched with value() and set with setValue().

Clicking the up/down buttons or using the keyboard accelerator's up and down arrows will increase or decrease the current value in steps of size singleStep(). If you want to change this behavior you can reimplement the virtual function stepBy(). The minimum and maximum value and the step size can be set using one of the constructors, and can be changed later with setMinimum(), setMaximum() and setSingleStep().

Most spin boxes are directional, but QSpinBox can also operate as a circular spin box, i.e. if the range is 0-99 and the current value is 99, clicking "up" will give 0 if wrapping() is set to true. Use setWrapping() if you want circular behavior.

The displayed value can be prepended and appended with arbitrary strings indicating, for example, currency or the unit of measurement. See setPrefix() and setSuffix(). The text in the spin box is retrieved with text() (which includes any prefix() and suffix()), or with cleanText() (which has no prefix(), no suffix() and no leading or trailing whitespace).

It is often desirable to give user a default value in addition to the range of acceptable numeric values. Refer to the setSpecialValueText() method for more information.

	Spin box shown in the Windows XP widget style.
	Spin box shown in the Mac OS X widget style.
	Spin box shown in the Fusion widget style.

Subclassing QSpinBox

If using prefix(), suffix(), and specialValueText() do not provide enough control you subclass QSpinBox and reimplement valueFromText() and textFromValue(). The following example show code for a custom spin box which allows the user to enter icon sizes such as "32 x 32".

int IconSizeSpinBox::valueFromText(const QString &text) const {
    QRegularExpression regExp(tr("(\\d+)(\\s*x\\s*\\d+)?"), QPatternOption::ExactMatchOption);
    QRegularExpressionMatch match = regExp.match(text);
 
    if (match.hasMatch())) {
        return regExp.captured(1).toInteger<int>();
    } else {
        return 0;
    }
}
 
QString IconSizeSpinBox::textFromValue(int value) const {
    return tr("%1 x %1").formatArg(value);
}

See also: QDoubleSpinBox, QDateTimeEdit, QSlider

Constructor & Destructor Documentation

QSpinBox::QSpinBox ( QWidget * parent = nullptr )

explicit

Constructs a spin box with the given parent. The minimum value is 0 and the maximum value is 99, using a step value of 1. The value of the QSpinbox is initially set to 0.

See also: setMinimum(), setMaximum(), setSingleStep()

Method Documentation

QString QSpinBox::cleanText ( ) const

Returns the value of the property.

int QSpinBox::displayIntegerBase ( ) const

Returns the value of the property.

bool QSpinBox::event ( QEvent * event )

overrideprotected

Reimplemented from QAbstractSpinBox::event()

void QSpinBox::fixup ( QString & input ) const

overrideprotectedvirtual

Reimplemented from QAbstractSpinBox::fixup()

int QSpinBox::maximum ( ) const

Returns the value of the property.

int QSpinBox::minimum ( ) const

Returns the value of the property.

QString QSpinBox::prefix ( ) const

Returns the value of the property.

void QSpinBox::setDisplayIntegerBase ( int base )

Sets the value of the property to base.

void QSpinBox::setMaximum ( int max )

Sets the value of the property to max.

void QSpinBox::setMinimum ( int min )

Sets the value of the property to min.

void QSpinBox::setPrefix ( const QString & prefix )

Sets the value of the property to prefix.

void QSpinBox::setRange	(	int	min,
		int	max
	)

This method is used to set the min and max values with a single call.

setRange(min, max);
 
// equivalent to calling
setMinimum(min);
setMaximum(max);

See also: QSpinBox::minimum, QSpinBox::maximum

void QSpinBox::setSingleStep ( int val )

Sets the value of the property to val.

void QSpinBox::setSuffix ( const QString & suffix )

Sets the value of the property to suffix.

void QSpinBox::setValue ( int val )

slot

Sets the value of the property to val.

int QSpinBox::singleStep ( ) const

Returns the value of the property.

QString QSpinBox::suffix ( ) const

Returns the value of the property.

QString QSpinBox::textFromValue ( int value ) const

protectedvirtual

This method is used by the spin box when it needs to display the given value. The default implementation returns a string containing value using QWidget::locale().toString(), but with the thousand separator removed.

If you reimplement this method you may also need to reimplement valueFromText() and validate(). QSpinBox does not call this method in the implementation of specialValueText(). This method should not return a value which includes the prefix() or suffix().

See also: valueFromText(), validate(), QLocale::groupSeparator()

QValidator::State QSpinBox::validate	(	QString &	input,
		int &	pos
	)		const

overrideprotectedvirtual

Reimplemented from QAbstractSpinBox::validate()

int QSpinBox::value ( ) const

Returns the value of the property.

void QSpinBox::valueChanged ( const QString & text )

signal

This signal is emitted when the spin box value is changed. The new value for the spin box is the given text with no prefix() or suffix().

void QSpinBox::valueChanged ( int newValue )

signal

This signal is emitted when the spin box value is changed. The new value for the spin box is the given newValue.

int QSpinBox::valueFromText ( const QString & text ) const

protectedvirtual

This method is used by the spin box whenever it needs to interpret text entered by the user as a value. Subclasses that need to display spin box values in a non-numeric way need to reimplement this function.

QSpinBox handles specialValueText() separately; this function is only concerned with the other values.

See also: textFromValue(), validate()

Property Documentation

QSpinBox::cleanText

This property holds the text of the spin box excluding any prefix, suffix, or leading or trailing whitespace.

See also: text, QSpinBox::prefix, QSpinBox::suffix

Properties	Class Methods
read	cleanText

QSpinBox::displayIntegerBase

This property holds the base used to display the value of the spin box. The default displayIntegerBase value is 10.

See also: textFromValue(), valueFromText()

Properties	Class Methods
read	displayIntegerBase
write	setDisplayIntegerBase

QSpinBox::maximum

This property holds the maximum value of the spin box. When setting this property the minimum is adjusted if necessary, to ensure that the range remains valid. The default maximum value is 99.

See also: setRange(), specialValueText

Properties	Class Methods
read	maximum
write	setMaximum

QSpinBox::minimum

This property holds the minimum value of the spin box. When setting this property the maximum is adjusted if necessary to ensure that the range remains valid. The default minimum value is 0.

See also: setRange(), specialValueText

Properties	Class Methods
read	minimum
write	setMinimum

QSpinBox::prefix

This property holds the spin box's prefix. The prefix is prepended to the start of the displayed value. Typical use is to display a unit of measurement or a currency symbol.

sb->setPrefix("$");

To turn off the prefix display, set this property to an empty string. The default is no prefix. The prefix is not displayed when value() == minimum() and specialValueText() is set.

If no prefix is set, prefix() returns an empty string.

See also: suffix(), setSuffix(), specialValueText(), setSpecialValueText()

Properties	Class Methods
read	prefix
write	setPrefix

QSpinBox::singleStep

This property holds the step value.

When the user uses the arrows to change the spin box's value the value will be incremented/decremented by the amount of the singleStep. The default value is 1. Setting a singleStep value of less than 0 does nothing.

Properties	Class Methods
read	singleStep
write	setSingleStep

QSpinBox::suffix

This property holds the suffix of the spin box. The suffix is appended to the end of the displayed value. Typical use is to display a unit of measurement or a currency symbol.

sb->setSuffix(" km");

To turn off the suffix display, set this property to an empty string. The default is no suffix. The suffix is not displayed for the minimum() if specialValueText() is set. If no suffix is set suffix() returns an empty string.

See also: prefix(), setPrefix(), specialValueText(), setSpecialValueText()

Properties	Class Methods
read	suffix
write	setSuffix

QSpinBox::value

This property holds the value of the spin box.

setValue() will emit valueChanged() if the new value is different from the old one.

Properties	Class Methods
read	value
write	setValue
notify	valueChanged
user	true

Public Signals

Public Slots

Public Methods

Protected Methods

Properties

Additional Inherited Members

Detailed Description

Subclassing QSpinBox

Constructor & Destructor Documentation

Method Documentation

Property Documentation