The QAbstractSlider class provides an integer value within a range. More...

Inheritance diagram for QAbstractSlider:

Public Types
enum	SliderAction

Public Types inherited from QWidget
enum	RenderFlag

Public Types inherited from QPaintDevice
enum	PaintDeviceMetric

Public Signals
void	actionTriggered (int action)

void	rangeChanged (int min, int max)

void	sliderMoved (int pos)

void	sliderPressed ()

void	sliderReleased ()

void	valueChanged (int value)

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	setOrientation (Qt::Orientation orientation)

void	setRange (int min, int max)

void	setValue (int value)

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
	QAbstractSlider (QWidget *parent=nullptr)

	~QAbstractSlider ()

bool	hasTracking () const

bool	invertedAppearance () const

bool	invertedControls () const

bool	isSliderDown () const

int	maximum () const

int	minimum () const

Qt::Orientation	orientation () const

int	pageStep () const

void	setInvertedAppearance (bool enable)

void	setInvertedControls (bool enable)

void	setMaximum (int value)

void	setMinimum (int value)

void	setPageStep (int value)

void	setSingleStep (int value)

void	setSliderDown (bool enable)

void	setSliderPosition (int value)

void	setTracking (bool enable)

int	singleStep () const

int	sliderPosition () const

void	triggerAction (SliderAction action)

int	value () 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

virtual QVariant	inputMethodQuery (Qt::InputMethodQuery query) 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

virtual QSize	minimumSizeHint () 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

virtual QSize	sizeHint () 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 Types
enum	SliderChange

Protected Methods
void	changeEvent (QEvent *event) override

bool	event (QEvent *event) override

void	keyPressEvent (QKeyEvent *event) override

SliderAction	repeatAction () const

void	setRepeatAction (SliderAction action, int thresholdTime=500, int repeatTime=50)

virtual void	sliderChange (SliderChange change)

void	timerEvent (QTimerEvent *event) override

void	wheelEvent (QWheelEvent *event) override

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

virtual void	closeEvent (QCloseEvent *event)

virtual void	contextMenuEvent (QContextMenuEvent *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

virtual void	focusInEvent (QFocusEvent *event)

bool	focusNextChild ()

virtual bool	focusNextPrevChild (bool next)

virtual void	focusOutEvent (QFocusEvent *event)

bool	focusPreviousChild ()

virtual void	hideEvent (QHideEvent *event)

void	initPainter (QPainter *painter) const override

virtual void	inputMethodEvent (QInputMethodEvent *event)

virtual void	keyReleaseEvent (QKeyEvent *event)

virtual void	leaveEvent (QEvent *event)

int	metric (PaintDeviceMetric metric) const override

virtual void	mouseDoubleClickEvent (QMouseEvent *event)

virtual void	mouseMoveEvent (QMouseEvent *event)

virtual void	mousePressEvent (QMouseEvent *event)

virtual void	mouseReleaseEvent (QMouseEvent *event)

virtual void	moveEvent (QMoveEvent *event)

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

virtual void	paintEvent (QPaintEvent *event)

virtual void	resizeEvent (QResizeEvent *event)

virtual void	showEvent (QShowEvent *event)

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
	invertedAppearance

	invertedControls

	maximum

	minimum

	orientation

	pageStep

	singleStep

	sliderDown

	sliderPosition

	tracking

	value

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 QWidget
using	RenderFlags = QFlags< RenderFlag >

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 QAbstractSlider class provides an integer value within a range. The class is designed as a common super class for widgets like QScrollBar, QSlider and QDial. These are the main properties of the class.

The setValue() method is used to set the current value to any integer in the allowed range. Some widgets may allow the user to set any value. Other widgets may require the value to be a multiple of singleStep() or pageStep().

QAbstractSlider::value: Bounded integer that QAbstractSlider maintains.
QAbstractSlider::minimum: Lowest possible value.
QAbstractSlider::maximum: Highest possible value.
QAbstractSlider::singleStep: The smaller of two natural steps that an abstract sliders provides and typically corresponds to the user pressing an arrow key.
QAbstractSlider::pageStep: The larger of two natural steps that an abstract slider provides and typically corresponds to the user pressing PageUp or PageDown.
QAbstractSlider::tracking: Whether slider tracking is enabled.
QAbstractSlider::sliderPosition: The current position of the slider. If tracking is enabled (the default), this is identical to value.

Methods and Signals

This class provides the sliderChange() method which is used to update the on screen representation of sliders. Inherited classes can simulate a slider action by calling triggerAction(). The two methods QStyle::sliderPositionFromValue() and QStyle::sliderValueFromPosition() can be used by inherited classes or style classes to map screen coordinates to logical range values.

QAbstractSlider emits a comprehensive set of signals as shown below.

Signal	Emitted When
valueChanged()	Value has changed. The tracking determines whether this signal is emitted during user interaction.
sliderPressed()	User starts to drag the slider.
sliderMoved()	User drags the slider.
sliderReleased()	User releases the slider.
actionTriggered()	Slider action was triggered.
rangeChanged()	Range changed.

See also: QAbstractSpinBox, QDial, QScrollBar, QSlider

Member Enumeration Documentation

enum QAbstractSlider::SliderAction

This enum describes the possible actions for a slider.

Constant	Value
`QAbstractSlider::SliderNoAction`	`0`
`QAbstractSlider::SliderSingleStepAdd`	`1`
`QAbstractSlider::SliderSingleStepSub`	`2`
`QAbstractSlider::SliderPageStepAdd`	`3`
`QAbstractSlider::SliderPageStepSub`	`4`
`QAbstractSlider::SliderToMinimum`	`5`
`QAbstractSlider::SliderToMaximum`	`6`
`QAbstractSlider::SliderMove`	`7`

enum QAbstractSlider::SliderChange

protected

This enum describes the attributes which can be modified on a slider.

Constant	Value
`QAbstractSlider::SliderRangeChange`	`0`
`QAbstractSlider::SliderOrientationChange`	`1`
`QAbstractSlider::SliderStepsChange`	`2`
`QAbstractSlider::SliderValueChange`	`3`

Constructor & Destructor Documentation

QAbstractSlider::QAbstractSlider ( QWidget * parent = nullptr )

explicit

Constructs an abstract slider. The parent argument is sent to the QWidget constructor. The minimum defaults to 0, the maximum to 99, with a singleStep size of 1 and a pageStep size of 10, and an initial value of 0.

QAbstractSlider::~QAbstractSlider ( )

Destroys the slider.

Method Documentation

void QAbstractSlider::actionTriggered ( int action )

signal

This signal is emitted when the given action is triggered. Actions are SliderSingleStepAdd, SliderSingleStepSub, SliderPageStepAdd, SliderPageStepSub, SliderToMinimum, SliderToMaximum, and SliderMove.

When the signal is emitted, the sliderPosition has been adjusted according to the action, but the value has not yet been propagated (meaning the valueChanged() signal was not yet emitted), and the visual display has not been updated. In slots connected to this signal you can thus safely adjust any action by calling setSliderPosition() yourself, based on both the action and the slider's value.

See also: triggerAction()

void QAbstractSlider::changeEvent ( QEvent * event )

overrideprotectedvirtual

Reimplemented from QWidget::changeEvent()

bool QAbstractSlider::event ( QEvent * event )

overrideprotected

Reimplemented from QWidget::event()

bool QAbstractSlider::hasTracking ( ) const

Returns the value of the property.

bool QAbstractSlider::invertedAppearance ( ) const

Returns the value of the property.

bool QAbstractSlider::invertedControls ( ) const

Returns the value of the property.

bool QAbstractSlider::isSliderDown ( ) const

Returns the value of the property.

void QAbstractSlider::keyPressEvent ( QKeyEvent * event )

overrideprotectedvirtual

Reimplemented from QWidget::keyPressEvent()

int QAbstractSlider::maximum ( ) const

Returns the value of the property.

int QAbstractSlider::minimum ( ) const

Returns the value of the property.

Qt::Orientation QAbstractSlider::orientation ( ) const

Returns the value of the property.

int QAbstractSlider::pageStep ( ) const

Returns the value of the property.

void QAbstractSlider::rangeChanged	(	int	min,
		int	max
	)

signal

This signal is emitted when the slider range has changed, with min being the new minimum, and max being the new maximum.

See also: minimum, maximum

SliderAction QAbstractSlider::repeatAction ( ) const

protected

Returns the current repeat action.

See also: setRepeatAction()

void QAbstractSlider::setInvertedAppearance ( bool enable )

Sets the value of the property to enable.

void QAbstractSlider::setInvertedControls ( bool enable )

Sets the value of the property to enable.

void QAbstractSlider::setMaximum ( int value )

Sets the value of the property to value.

void QAbstractSlider::setMinimum ( int value )

Sets the value of the property to value.

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

slot

Sets the value of the property to orientation.

void QAbstractSlider::setPageStep ( int value )

Sets the value of the property to value.

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

slot

Sets the slider's minimum to min and its maximum to max. If max is smaller than min then >min becomes the only valid value.

See also: minimum, maximum

void QAbstractSlider::setRepeatAction	(	SliderAction	action,
		int	thresholdTime = `500`,
		int	repeatTime = `50`
	)

protected

Sets action to be triggered repetitively in intervals of repeatTime, after an initial delay of thresholdTime.

See also: triggerAction(), repeatAction()

void QAbstractSlider::setSingleStep ( int value )

Sets the value of the property to value.

void QAbstractSlider::setSliderDown ( bool enable )

Sets the value of the property to enable.

void QAbstractSlider::setSliderPosition ( int value )

Sets the value of the property to value.

void QAbstractSlider::setTracking ( bool enable )

Sets the value of the property to enable.

void QAbstractSlider::setValue ( int value )

slot

Sets the value of the property to value.

int QAbstractSlider::singleStep ( ) const

Returns the value of the property.

void QAbstractSlider::sliderChange ( SliderChange change )

protectedvirtual

Reimplement this method to track slider changes such as SliderRangeChange, SliderOrientationChange, SliderStepsChange, or SliderValueChange. The default implementation only updates the display and ignores the change parameter.

Reimplemented in QDial::sliderChange(), QScrollBar::sliderChange()

void QAbstractSlider::sliderMoved ( int pos )

signal

This signal is emitted when sliderDown is true and the slider moves. This usually happens when the user is dragging the slider. The pos is the new slider position. This signal is emitted even when tracking is turned off.

See also: setTracking(), valueChanged(), isSliderDown(), sliderPressed(), sliderReleased()

int QAbstractSlider::sliderPosition ( ) const

Returns the value of the property.

void QAbstractSlider::sliderPressed ( )

signal

This signal is emitted when the user presses the slider with the mouse, or programmatically when setSliderDown(true) is called.

See also: sliderReleased(), sliderMoved(), isSliderDown()

void QAbstractSlider::sliderReleased ( )

signal

This signal is emitted when the user releases the slider with the mouse, or programmatically when setSliderDown(false) is called.

See also: sliderPressed(), sliderMoved(), sliderDown

void QAbstractSlider::timerEvent ( QTimerEvent * event )

overrideprotected

Reimplemented from QObject::timerEvent()

void QAbstractSlider::triggerAction ( SliderAction action )

Triggers a slider action. Possible actions are SliderSingleStepAdd, SliderSingleStepSub, SliderPageStepAdd, SliderPageStepSub, SliderToMinimum, SliderToMaximum, and SliderMove.

See also: actionTriggered()

int QAbstractSlider::value ( ) const

Returns the value of the property.

void QAbstractSlider::valueChanged ( int value )

signal

This signal is emitted when the given slider value has changed.

void QAbstractSlider::wheelEvent ( QWheelEvent * event )

overrideprotectedvirtual

Reimplemented from QWidget::wheelEvent()

Reimplemented in QScrollBar::wheelEvent()

Property Documentation

QAbstractSlider::invertedAppearance

This property holds whether or not a slider shows its values inverted. If this property is false (the default), the minimum and maximum will be shown in its classic position for the inherited widget. If the value is true, the minimum and maximum appear at their opposite location.

This property makes most sense for sliders and dials. For scroll bars, the visual effect of the scroll bar subcontrols depends on whether or not the styles understand inverted appearance; most styles ignore this property for scroll bars.

Properties	Class Methods
read	invertedAppearance
write	setInvertedAppearance

QAbstractSlider::invertedControls

This property holds whether or not the slider inverts its wheel and key events.

If this property is false, scrolling the mouse wheel "up" and using keys like page up will increase the slider's value towards its maximum. Otherwise pressing page up will move value towards the slider's minimum.

Properties	Class Methods
read	invertedControls
write	setInvertedControls

QAbstractSlider::maximum

This property holds the slider's maximum value.

When setting this property, the minimum is adjusted if necessary to ensure that the range remains valid. Also the slider's current value is adjusted to be within the new range.

Properties	Class Methods
read	maximum
write	setMaximum

QAbstractSlider::minimum

This property holds the slider's minimum value.

When setting this property, the maximum is adjusted if necessary to ensure that the range remains valid. Also the slider's current value is adjusted to be within the new range.

Properties	Class Methods
read	minimum
write	setMinimum

QAbstractSlider::orientation

This property holds the orientation of the slider. The orientation must be Qt::Vertical (the default) or Qt::Horizontal.

Properties	Class Methods
read	orientation
write	setOrientation

QAbstractSlider::pageStep

This property holds the page step. The larger of two natural steps that an abstract slider provides and typically corresponds to the user pressing PageUp or PageDown.

See also: singleStep

Properties	Class Methods
read	pageStep
write	setPageStep

QAbstractSlider::singleStep

This property holds the single step. The smaller of two natural steps that an abstract sliders provides and typically corresponds to the user pressing an arrow key. If the property is modified during an auto repeating key event, behavior is undefined.

See also: pageStep

Properties	Class Methods
read	singleStep
write	setSingleStep

QAbstractSlider::sliderDown

This property holds whether the slider is pressed down. The property is set by subclasses in order to let the abstract slider know whether or not tracking has any effect. Changing the slider down property emits the sliderPressed() and sliderReleased() signals.

Properties	Class Methods
read	isSliderDown
write	setSliderDown
designable	true

QAbstractSlider::sliderPosition

This property holds the current slider position. If tracking is enabled (the default), this is identical to value.

Properties	Class Methods
read	sliderPosition
write	setSliderPosition
notify	sliderMoved

QAbstractSlider::tracking

This property holds whether slider tracking is enabled.

If tracking is enabled (the default), the slider emits the valueChanged() signal while the slider is being dragged. If tracking is disabled, the slider emits the valueChanged() signal only when the user releases the slider.

See also: sliderDown

Properties	Class Methods
read	hasTracking
write	setTracking

QAbstractSlider::value

This property holds the slider's current value. The slider forces the value to be within the legal range: minimum <= value <= maximum. Changing the value also changes the sliderPosition.

Properties	Class Methods
read	value
write	setValue
notify	valueChanged
user	true

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