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

#include <qabstractslider.h>

Inheritance diagram for QAbstractSlider:

Collaboration diagram for QAbstractSlider:

Public Types
enum	SliderAction { SliderNoAction , SliderSingleStepAdd , SliderSingleStepSub , SliderPageStepAdd , SliderPageStepSub , SliderToMinimum , SliderToMaximum , SliderMove }

Public Types inherited from QWidget
enum	RenderFlag { DrawWindowBackground = 0x1 , DrawChildren = 0x2 , IgnoreMask = 0x4 }

Public Types inherited from QPaintDevice
enum	PaintDeviceMetric { PdmWidth = 1 , PdmHeight , PdmWidthMM , PdmHeightMM , PdmNumColors , PdmDepth , PdmDpiX , PdmDpiY , PdmPhysicalDpiX , PdmPhysicalDpiY , PdmDevicePixelRatio , PdmDevicePixelRatioScaled }

Public Slots
void	setValue (int)

void	setOrientation (Qt::Orientation)

void	setRange (int min, int max)

Public Slots inherited from QWidget
void	setEnabled (bool)

void	setDisabled (bool)

void	setWindowModified (bool)

void	setWindowTitle (const QString &)

void	setStyleSheet (const QString &styleSheet)

void	setFocus ()

void	update ()

void	repaint ()

virtual void	setVisible (bool visible)

void	setHidden (bool hidden)

void	show ()

void	hide ()

void	showMinimized ()

void	showMaximized ()

void	showFullScreen ()

void	showNormal ()

bool	close ()

void	raise ()

void	lower ()

Public Slots inherited from QObject
void	deleteLater ()

Signals
void	valueChanged (int value)

void	sliderPressed ()

void	sliderMoved (int position)

void	sliderReleased ()

void	rangeChanged (int min, int max)

void	actionTriggered (int action)

Signals inherited from QWidget
void	windowTitleChanged (const QString &title)

void	windowIconChanged (const QIcon &icon)

void	windowIconTextChanged (const QString &iconText)

void	customContextMenuRequested (const QPoint &pos)

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

void	objectNameChanged (const QString &objectName, QPrivateSignal)

Public Member Functions
	QAbstractSlider (QWidget *parent=nullptr)

	~QAbstractSlider ()

Qt::Orientation	orientation () const

void	setMinimum (int)

int	minimum () const

void	setMaximum (int)

int	maximum () const

void	setSingleStep (int)

int	singleStep () const

void	setPageStep (int)

int	pageStep () const

void	setTracking (bool enable)

bool	hasTracking () const

void	setSliderDown (bool)

bool	isSliderDown () const

void	setSliderPosition (int)

int	sliderPosition () const

void	setInvertedAppearance (bool)

bool	invertedAppearance () const

void	setInvertedControls (bool)

bool	invertedControls () const

int	value () const

void	triggerAction (SliderAction action)

Public Member Functions inherited from QWidget
	QWidget (QWidget *parent=nullptr, Qt::WindowFlags f=Qt::WindowFlags())

	~QWidget ()

int	devType () const override

WId	winId () const

void	createWinId ()

WId	internalWinId () const

WId	effectiveWinId () const

QStyle *	style () const

void	setStyle (QStyle *)

bool	isWindow () const

bool	isModal () const

Qt::WindowModality	windowModality () const

void	setWindowModality (Qt::WindowModality windowModality)

bool	isEnabled () const

bool	isEnabledTo (const QWidget *) const

QRect	frameGeometry () const

const QRect &	geometry () const

QRect	normalGeometry () const

int	x () const

int	y () const

QPoint	pos () const

QSize	frameSize () const

QSize	size () const

int	width () const

int	height () const

QRect	rect () const

QRect	childrenRect () const

QRegion	childrenRegion () const

QSize	minimumSize () const

QSize	maximumSize () const

int	minimumWidth () const

int	minimumHeight () const

int	maximumWidth () const

int	maximumHeight () const

void	setMinimumSize (const QSize &)

void	setMinimumSize (int minw, int minh)

void	setMaximumSize (const QSize &)

void	setMaximumSize (int maxw, int maxh)

void	setMinimumWidth (int minw)

void	setMinimumHeight (int minh)

void	setMaximumWidth (int maxw)

void	setMaximumHeight (int maxh)

QSize	sizeIncrement () const

void	setSizeIncrement (const QSize &)

void	setSizeIncrement (int w, int h)

QSize	baseSize () const

void	setBaseSize (const QSize &)

void	setBaseSize (int basew, int baseh)

void	setFixedSize (const QSize &)

void	setFixedSize (int w, int h)

void	setFixedWidth (int w)

void	setFixedHeight (int h)

QPointF	mapToGlobal (const QPointF &) const

QPoint	mapToGlobal (const QPoint &) const

QPointF	mapFromGlobal (const QPointF &) const

QPoint	mapFromGlobal (const QPoint &) const

QPointF	mapToParent (const QPointF &) const

QPoint	mapToParent (const QPoint &) const

QPointF	mapFromParent (const QPointF &) const

QPoint	mapFromParent (const QPoint &) const

QPointF	mapTo (const QWidget *, const QPointF &) const

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

QPointF	mapFrom (const QWidget *, const QPointF &) const

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

QWidget *	window () const

QWidget *	nativeParentWidget () const

QWidget *	topLevelWidget () const

const QPalette &	palette () const

void	setPalette (const QPalette &)

void	setBackgroundRole (QPalette::ColorRole)

QPalette::ColorRole	backgroundRole () const

void	setForegroundRole (QPalette::ColorRole)

QPalette::ColorRole	foregroundRole () const

const QFont &	font () const

void	setFont (const QFont &)

QFontMetrics	fontMetrics () const

QFontInfo	fontInfo () const

QCursor	cursor () const

void	setCursor (const QCursor &)

void	unsetCursor ()

void	setMouseTracking (bool enable)

bool	hasMouseTracking () const

bool	underMouse () const

void	setTabletTracking (bool enable)

bool	hasTabletTracking () const

void	setMask (const QBitmap &)

void	setMask (const QRegion &)

QRegion	mask () const

void	clearMask ()

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))

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

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

void	ungrabGesture (Qt::GestureType type)

QString	styleSheet () const

QString	windowTitle () const

void	setWindowIcon (const QIcon &icon)

QIcon	windowIcon () const

void	setWindowIconText (const QString &)

QString	windowIconText () const

void	setWindowRole (const QString &)

QString	windowRole () const

void	setWindowFilePath (const QString &filePath)

QString	windowFilePath () const

void	setWindowOpacity (qreal level)

qreal	windowOpacity () const

bool	isWindowModified () const

QString	accessibleName () const

void	setAccessibleName (const QString &name)

QString	accessibleDescription () const

void	setAccessibleDescription (const QString &description)

void	setLayoutDirection (Qt::LayoutDirection direction)

Qt::LayoutDirection	layoutDirection () const

void	unsetLayoutDirection ()

void	setLocale (const QLocale &locale)

QLocale	locale () const

void	unsetLocale ()

bool	isRightToLeft () const

bool	isLeftToRight () const

bool	isActiveWindow () const

void	activateWindow ()

void	clearFocus ()

void	setFocus (Qt::FocusReason reason)

Qt::FocusPolicy	focusPolicy () const

void	setFocusPolicy (Qt::FocusPolicy policy)

bool	hasFocus () const

void	setFocusProxy (QWidget *)

QWidget *	focusProxy () const

Qt::ContextMenuPolicy	contextMenuPolicy () const

void	setContextMenuPolicy (Qt::ContextMenuPolicy policy)

void	grabMouse ()

void	grabMouse (const QCursor &)

void	releaseMouse ()

void	grabKeyboard ()

void	releaseKeyboard ()

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

void	releaseShortcut (int id)

void	setShortcutEnabled (int id, bool enable=true)

void	setShortcutAutoRepeat (int id, bool enable=true)

bool	updatesEnabled () const

void	setUpdatesEnabled (bool enable)

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

void	update (const QRect &)

void	update (const QRegion &)

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

void	repaint (const QRect &)

void	repaint (const QRegion &)

void	stackUnder (QWidget *)

void	move (int x, int y)

void	move (const QPoint &)

void	resize (int w, int h)

void	resize (const QSize &)

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

void	setGeometry (const QRect &)

QByteArray	saveGeometry () const

bool	restoreGeometry (const QByteArray &geometry)

void	adjustSize ()

bool	isVisible () const

bool	isVisibleTo (const QWidget *) const

bool	isHidden () const

bool	isMinimized () const

bool	isMaximized () const

bool	isFullScreen () const

Qt::WindowStates	windowState () const

void	setWindowState (Qt::WindowStates state)

void	overrideWindowState (Qt::WindowStates state)

virtual QSize	sizeHint () const

virtual QSize	minimumSizeHint () const

QSizePolicy	sizePolicy () const

void	setSizePolicy (QSizePolicy)

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

virtual int	heightForWidth (int) const

virtual bool	hasHeightForWidth () const

QRegion	visibleRegion () const

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

void	setContentsMargins (const QMargins &margins)
	The setContentsMargins function sets the margins around the widget's contents. More...

QMargins	contentsMargins () const
	The contentsMargins function returns the widget's contents margins. More...

QRect	contentsRect () const

QLayout *	layout () const

void	setLayout (QLayout *)

void	updateGeometry ()

void	setParent (QWidget *parent)

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

void	scroll (int dx, int dy)

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

QWidget *	focusWidget () const

QWidget *	nextInFocusChain () const

QWidget *	previousInFocusChain () const
	The previousInFocusChain function returns the previous widget in this widget's focus chain. More...

bool	acceptDrops () const

void	setAcceptDrops (bool on)

void	addAction (QAction *action)

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

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

void	insertAction (QAction before, QAction action)

void	removeAction (QAction *action)

QList< QAction * >	actions () const

QAction *	addAction (const QString &text)

QAction *	addAction (const QIcon &icon, const QString &text)

QAction *	addAction (const QString &text, const QObject receiver, const char member, Qt::ConnectionType type=Qt::AutoConnection)

QAction *	addAction (const QIcon &icon, const QString &text, const QObject receiver, const char member, Qt::ConnectionType type=Qt::AutoConnection)

template<typename... Args, typename = compatible_action_slot_args<Args...>>
QAction *	addAction (const QString &text, Args &&...args)

template<typename... Args, typename = compatible_action_slot_args<Args...>>
QAction *	addAction (const QIcon &icon, const QString &text, Args &&...args)

QWidget *	parentWidget () const

void	setWindowFlags (Qt::WindowFlags type)

Qt::WindowFlags	windowFlags () const

void	setWindowFlag (Qt::WindowType, bool on=true)

void	overrideWindowFlags (Qt::WindowFlags type)

Qt::WindowType	windowType () const

QWidget *	childAt (int x, int y) const

QWidget *	childAt (const QPoint &p) const

void	setAttribute (Qt::WidgetAttribute, bool on=true)

bool	testAttribute (Qt::WidgetAttribute) const

QPaintEngine *	paintEngine () const override

void	ensurePolished () const

bool	isAncestorOf (const QWidget *child) const

bool	autoFillBackground () const

void	setAutoFillBackground (bool enabled)

QBackingStore *	backingStore () const

QWindow *	windowHandle () const

QScreen *	screen () const

void	setScreen (QScreen *)

virtual QVariant	inputMethodQuery (Qt::InputMethodQuery) const

Qt::InputMethodHints	inputMethodHints () const

void	setInputMethodHints (Qt::InputMethodHints hints)

Public Member Functions inherited from QObject
Q_INVOKABLE	QObject (QObject *parent=nullptr)

virtual	~QObject ()

virtual bool	eventFilter (QObject watched, QEvent event)

QString	objectName () const

void	setObjectName (const QString &name)

QBindable< QString >	bindableObjectName ()

bool	isWidgetType () const

bool	isWindowType () const

bool	signalsBlocked () const noexcept

bool	blockSignals (bool b) noexcept

QThread *	thread () const

void	moveToThread (QThread *thread)

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

void	killTimer (int id)

template<typename T >
T	findChild (const QString &aName=QString(), Qt::FindChildOptions options=Qt::FindChildrenRecursively) const

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

template<typename T >
QList< T >	findChildren (Qt::FindChildOptions options=Qt::FindChildrenRecursively) const

const QObjectList &	children () const

void	setParent (QObject *parent)

void	installEventFilter (QObject *filterObj)

void	removeEventFilter (QObject *obj)

QMetaObject::Connection	connect (const QObject sender, const char signal, const char *member, Qt::ConnectionType type=Qt::AutoConnection) const

bool	disconnect (const char signal=nullptr, const QObject receiver=nullptr, const char *member=nullptr) const

bool	disconnect (const QObject receiver, const char member=nullptr) const

void	dumpObjectTree () const

void	dumpObjectInfo () const

bool	setProperty (const char *name, const QVariant &value)

QVariant	property (const char *name) const

QList< QByteArray >	dynamicPropertyNames () const

QBindingStorage *	bindingStorage ()

const QBindingStorage *	bindingStorage () const

QObject *	parent () const

bool	inherits (const char *classname) const

Public Member Functions inherited from QPaintDevice
virtual	~QPaintDevice ()

bool	paintingActive () const

int	width () const

int	height () const

int	widthMM () const

int	heightMM () const

int	logicalDpiX () const

int	logicalDpiY () const

int	physicalDpiX () const

int	physicalDpiY () const

qreal	devicePixelRatio () const

qreal	devicePixelRatioF () const

int	colorCount () const

int	depth () const

Protected Types
enum	SliderChange { SliderRangeChange , SliderOrientationChange , SliderStepsChange , SliderValueChange }

Protected Member Functions
bool	event (QEvent *e) override

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

SliderAction	repeatAction () const

virtual void	sliderChange (SliderChange change)

void	keyPressEvent (QKeyEvent *ev) override

void	timerEvent (QTimerEvent *) override

void	changeEvent (QEvent *e) override

	QAbstractSlider (QAbstractSliderPrivate &dd, QWidget *parent=nullptr)

Protected Member Functions inherited from QWidget
virtual void	mousePressEvent (QMouseEvent *event)

virtual void	mouseReleaseEvent (QMouseEvent *event)

virtual void	mouseDoubleClickEvent (QMouseEvent *event)

virtual void	mouseMoveEvent (QMouseEvent *event)

virtual void	keyReleaseEvent (QKeyEvent *event)

virtual void	focusInEvent (QFocusEvent *event)

virtual void	focusOutEvent (QFocusEvent *event)

virtual void	enterEvent (QEnterEvent *event)

virtual void	leaveEvent (QEvent *event)

virtual void	paintEvent (QPaintEvent *event)

virtual void	moveEvent (QMoveEvent *event)

virtual void	resizeEvent (QResizeEvent *event)

virtual void	closeEvent (QCloseEvent *event)

virtual void	contextMenuEvent (QContextMenuEvent *event)

virtual void	actionEvent (QActionEvent *event)

virtual void	showEvent (QShowEvent *event)

virtual void	hideEvent (QHideEvent *event)

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

int	metric (PaintDeviceMetric) const override

void	initPainter (QPainter *painter) const override

QPaintDevice *	redirected (QPoint *offset) const override

QPainter *	sharedPainter () const override

virtual void	inputMethodEvent (QInputMethodEvent *)

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

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

virtual bool	focusNextPrevChild (bool next)

bool	focusNextChild ()

bool	focusPreviousChild ()

	QWidget (QWidgetPrivate &d, QWidget *parent, Qt::WindowFlags f)

Protected Member Functions inherited from QObject
QObject *	sender () const

int	senderSignalIndex () const

int	receivers (const char *signal) const

bool	isSignalConnected (const QMetaMethod &signal) const

virtual void	childEvent (QChildEvent *event)

virtual void	customEvent (QEvent *event)

virtual void	connectNotify (const QMetaMethod &signal)

virtual void	disconnectNotify (const QMetaMethod &signal)

	QObject (QObjectPrivate &dd, QObject *parent=nullptr)

Protected Member Functions inherited from QPaintDevice
	QPaintDevice () noexcept

Properties
int	minimum
	the sliders's minimum value More...

int	maximum
	the slider's maximum value More...

int	singleStep
	the single step. More...

int	pageStep
	the page step. More...

int	value
	the slider's current value More...

int	sliderPosition
	the current slider position More...

bool	tracking
	whether slider tracking is enabled More...

Qt::Orientation	orientation
	the orientation of the slider More...

bool	invertedAppearance
	whether or not a slider shows its values inverted. More...

bool	invertedControls
	whether or not the slider inverts its wheel and key events. More...

bool	sliderDown
	whether the slider is pressed down. More...

Properties inherited from QWidget
bool	modal
	whether the widget is a modal widget More...

Qt::WindowModality	windowModality
	which windows are blocked by the modal widget More...

bool	enabled
	whether the widget is enabled More...

QRect	geometry
	the geometry of the widget relative to its parent and excluding the window frame More...

QRect	frameGeometry
	geometry of the widget relative to its parent including any window frame More...

QRect	normalGeometry
	the geometry of the widget as it will appear when shown as a normal (not maximized or full screen) top-level widget More...

int	x
	the x coordinate of the widget relative to its parent including any window frame More...

int	y
	the y coordinate of the widget relative to its parent and including any window frame More...

QPoint	pos
	the position of the widget within its parent widget More...

QSize	frameSize
	the size of the widget including any window frame More...

QSize	size
	the size of the widget excluding any window frame More...

int	width
	the width of the widget excluding any window frame More...

int	height
	the height of the widget excluding any window frame More...

QRect	rect
	the internal geometry of the widget excluding any window frame More...

QRect	childrenRect
	the bounding rectangle of the widget's children More...

QRegion	childrenRegion
	the combined region occupied by the widget's children More...

QSizePolicy	sizePolicy
	the default layout behavior of the widget More...

QSize	minimumSize
	the widget's minimum size More...

QSize	maximumSize
	the widget's maximum size in pixels More...

int	minimumWidth
	the widget's minimum width in pixels More...

int	minimumHeight
	the widget's minimum height in pixels More...

int	maximumWidth
	the widget's maximum width in pixels More...

int	maximumHeight
	the widget's maximum height in pixels More...

QSize	sizeIncrement
	the size increment of the widget More...

QSize	baseSize
	the base size of the widget More...

QPalette	palette
	the widget's palette More...

QFont	font
	the font currently set for the widget More...

QCursor	cursor
	the cursor shape for this widget More...

bool	mouseTracking
	whether mouse tracking is enabled for the widget More...

bool	tabletTracking
	whether tablet tracking is enabled for the widget More...

bool	isActiveWindow
	whether this widget's window is the active window More...

Qt::FocusPolicy	focusPolicy
	the way the widget accepts keyboard focus More...

bool	focus
	whether this widget (or its focus proxy) has the keyboard input focus More...

Qt::ContextMenuPolicy	contextMenuPolicy
	how the widget shows a context menu More...

bool	updatesEnabled
	whether updates are enabled More...

bool	visible
	whether the widget is visible More...

bool	minimized
	whether this widget is minimized (iconified) More...

bool	maximized
	whether this widget is maximized More...

bool	fullScreen
	whether the widget is shown in full screen mode More...

QSize	sizeHint
	the recommended size for the widget More...

QSize	minimumSizeHint
	the recommended minimum size for the widget More...

bool	acceptDrops
	whether drop events are enabled for this widget More...

QString	windowTitle
	the window title (caption) More...

QIcon	windowIcon
	the widget's icon More...

QString	windowIconText
	the text to be displayed on the icon of a minimized window More...

double	windowOpacity
	The level of opacity for the window. More...

bool	windowModified
	whether the document shown in the window has unsaved changes More...

QString	accessibleName
	the widget's name as seen by assistive technologies More...

QString	accessibleDescription
	the widget's description as seen by assistive technologies More...

Qt::LayoutDirection	layoutDirection
	the layout direction for this widget. More...

bool	autoFillBackground
	whether the widget background is filled automatically More...

QString	styleSheet
	the widget's style sheet More...

QLocale	locale
	the widget's locale More...

QString	windowFilePath
	the file path associated with a widget More...

Qt::InputMethodHints	inputMethodHints
	What input method specific hints the widget has. More...

Properties inherited from QObject
QString	objectName
	the name of this object More...

Additional Inherited Members
Static Public Member Functions inherited from QWidget
static void	setTabOrder (QWidget , QWidget )

static QWidget *	mouseGrabber ()

static QWidget *	keyboardGrabber ()

static QWidget *	find (WId)

static QWidget *	createWindowContainer (QWindow window, QWidget parent=nullptr, Qt::WindowFlags flags=Qt::WindowFlags())

Static Public Member Functions inherited from QObject
static QMetaObject::Connection	connect (const QObject sender, const char signal, const QObject receiver, const char member, Qt::ConnectionType=Qt::AutoConnection)

static QMetaObject::Connection	connect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &method, Qt::ConnectionType type=Qt::AutoConnection)

template<typename Func1 , typename Func2 >
static QMetaObject::Connection	connect (const typename QtPrivate::FunctionPointer< Func1 >::Object sender, Func1 signal, const typename QtPrivate::FunctionPointer< Func2 >::Object receiver, Func2 slot, Qt::ConnectionType type=Qt::AutoConnection)

static QMetaObject::Connection ::type	connect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, Func2 slot)

static QMetaObject::Connection ::type	connect (const typename QtPrivate::FunctionPointer< Func1 >::Object sender, Func1 signal, const QObject context, Func2 slot, Qt::ConnectionType type=Qt::AutoConnection)

template<typename Func1 , typename Func2 >
static std::enable_if< QtPrivate::FunctionPointer< Func2 >::ArgumentCount==-1 &&!std::is_convertible_v< Func2, const char * >, QMetaObject::Connection >::type	connect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, Func2 slot)

template<typename Func1 , typename Func2 >
static std::enable_if< QtPrivate::FunctionPointer< Func2 >::ArgumentCount==-1 &&!std::is_convertible_v< Func2, const char * >, QMetaObject::Connection >::type	connect (const typename QtPrivate::FunctionPointer< Func1 >::Object sender, Func1 signal, const QObject context, Func2 slot, Qt::ConnectionType type=Qt::AutoConnection)

static bool	disconnect (const QObject sender, const char signal, const QObject receiver, const char member)

static bool	disconnect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &member)

static bool	disconnect (const QMetaObject::Connection &)

template<typename Func1 , typename Func2 >
static bool	disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object sender, Func1 signal, const typename QtPrivate::FunctionPointer< Func2 >::Object receiver, Func2 slot)

template<typename Func1 >
static bool	disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object sender, Func1 signal, const QObject receiver, void **zero)

Static Public Member Functions inherited from QPaintDevice
static qreal	devicePixelRatioFScale ()

Protected Slots inherited from QWidget
void	updateMicroFocus (Qt::InputMethodQuery query=Qt::ImQueryAll)

Protected Attributes inherited from QObject
QScopedPointer< QObjectData >	d_ptr

Protected Attributes inherited from QPaintDevice
ushort	painters

Related Functions inherited from QWidget
	setupUi (QWidget *widget)

Related Functions inherited from QObject
template< class T > T	qobject_cast (const QObject *object)

template< typename T > T	qFindChildqFindChildren (const QObject *obj, const QString &name)()

template< typename T > QList< T >	qFindChildrenqFindChildren (const QObject *obj, const QString &name)()

	QObjectList

Detailed Description

The QAbstractSlider class provides an integer value within a range.

\inmodule QtWidgets

The class is designed as a common super class for widgets like QScrollBar, QSlider and QDial.

Here are the main properties of the class:

\list 1

\l value: The bounded integer that QAbstractSlider maintains.

\l minimum: The lowest possible value.

\l maximum: The highest possible value.

\l singleStep: The smaller of two natural steps that an abstract sliders provides and typically corresponds to the user pressing an arrow key.

\l pageStep: The larger of two natural steps that an abstract slider provides and typically corresponds to the user pressing PageUp or PageDown.

\l tracking: Whether slider tracking is enabled.

\l sliderPosition: The current position of the slider. If \l tracking is enabled (the default), this is identical to \l value.

\endlist

Unity (1) may be viewed as a third step size. setValue() lets you set the current value to any integer in the allowed range, not just minimum() + n * singleStep() for integer values of n. Some widgets may allow the user to set any value at all; others may just provide multiples of singleStep() or pageStep().

QAbstractSlider emits a comprehensive set of signals:

\table \header

Signal
Emitted when \row
\l valueChanged()
the value has changed. The \l tracking determines whether this signal is emitted during user interaction. \row
\l sliderPressed()
the user starts to drag the slider. \row
\l sliderMoved()
the user drags the slider. \row
\l sliderReleased()
the user releases the slider. \row
\l actionTriggered()
a slider action was triggered. \row
\l rangeChanged()
a the range has changed. \endtable

QAbstractSlider provides a virtual sliderChange() function that is well suited for updating the on-screen representation of sliders. By calling triggerAction(), subclasses trigger slider actions. Two helper functions QStyle::sliderPositionFromValue() and QStyle::sliderValueFromPosition() help subclasses and styles to map screen coordinates to logical range values.

See also: QAbstractSpinBox, QSlider, QDial, QScrollBar, {Sliders Example}

Definition at line 53 of file qabstractslider.h.

Member Enumeration Documentation

◆ SliderAction

enum QAbstractSlider::SliderAction

\value SliderNoAction \value SliderSingleStepAdd \value SliderSingleStepSub \value SliderPageStepAdd \value SliderPageStepSub \value SliderToMinimum \value SliderToMaximum \value SliderMove

Enumerator
SliderNoAction
SliderSingleStepAdd
SliderSingleStepSub
SliderPageStepAdd
SliderPageStepSub
SliderToMinimum
SliderToMaximum
SliderMove

Definition at line 102 of file qabstractslider.h.

◆ SliderChange

enum QAbstractSlider::SliderChange

protected

\value SliderRangeChange \value SliderOrientationChange \value SliderStepsChange \value SliderValueChange

Enumerator
SliderRangeChange
SliderOrientationChange
SliderStepsChange
SliderValueChange

Definition at line 139 of file qabstractslider.h.

Constructor & Destructor Documentation

◆ QAbstractSlider() [1/2]

QAbstractSlider::QAbstractSlider ( QWidget * parent = nullptr )

explicit

Constructs an abstract slider.

The parent argument is sent to the QWidget constructor.

The \l minimum defaults to 0, the \l maximum to 99, with a \l singleStep size of 1 and a \l pageStep size of 10, and an initial \l value of 0.

Definition at line 275 of file qabstractslider.cpp.

◆ ~QAbstractSlider()

QAbstractSlider::~QAbstractSlider ( )

Destroys the slider.

Definition at line 289 of file qabstractslider.cpp.

◆ QAbstractSlider() [2/2]

QAbstractSlider::QAbstractSlider	(	QAbstractSliderPrivate &	dd,
		QWidget *	parent = `nullptr`
	)

protected

Definition at line 281 of file qabstractslider.cpp.

Member Function Documentation

◆ actionTriggered

void QAbstractSlider::actionTriggered ( int action )

signal

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

When the signal is emitted, the \l sliderPosition has been adjusted according to the action, but the \l 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()

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◆ changeEvent()

void QAbstractSlider::changeEvent ( QEvent * ev )

overrideprotectedvirtual

\reimp

Reimplemented from QWidget.

Definition at line 922 of file qabstractslider.cpp.

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◆ event()

bool QAbstractSlider::event ( QEvent * e )

overrideprotectedvirtual

\reimp

Reimplemented from QWidget.

Reimplemented in QSlider, QScrollBar, Slider, and QDial.

Definition at line 940 of file qabstractslider.cpp.

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◆ hasTracking()

bool QAbstractSlider::hasTracking ( ) const

Definition at line 443 of file qabstractslider.cpp.

◆ invertedAppearance()

bool QAbstractSlider::invertedAppearance ( ) const

Definition at line 565 of file qabstractslider.cpp.

◆ invertedControls()

bool QAbstractSlider::invertedControls ( ) const

Definition at line 589 of file qabstractslider.cpp.

◆ isSliderDown()

bool QAbstractSlider::isSliderDown ( ) const

Definition at line 479 of file qabstractslider.cpp.

◆ keyPressEvent()

void QAbstractSlider::keyPressEvent ( QKeyEvent * ev )

overrideprotectedvirtual

\reimp

Reimplemented from QWidget.

Definition at line 777 of file qabstractslider.cpp.

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◆ maximum()

int QAbstractSlider::maximum ( ) const

Definition at line 362 of file qabstractslider.cpp.

◆ minimum()

int QAbstractSlider::minimum ( ) const

Definition at line 338 of file qabstractslider.cpp.

◆ orientation()

Qt::Orientation QAbstractSlider::orientation ( ) const

Definition at line 315 of file qabstractslider.cpp.

◆ pageStep()

int QAbstractSlider::pageStep ( ) const

Definition at line 420 of file qabstractslider.cpp.

◆ rangeChanged

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

◆ repeatAction()

QAbstractSlider::SliderAction QAbstractSlider::repeatAction ( ) const

protected

Returns the current repeat action.

See also: setRepeatAction()

Definition at line 660 of file qabstractslider.cpp.

◆ setInvertedAppearance()

void QAbstractSlider::setInvertedAppearance ( bool invert )

Definition at line 571 of file qabstractslider.cpp.

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◆ setInvertedControls()

void QAbstractSlider::setInvertedControls ( bool invert )

Definition at line 595 of file qabstractslider.cpp.

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◆ setMaximum()

void QAbstractSlider::setMaximum ( int max )

Definition at line 356 of file qabstractslider.cpp.

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◆ setMinimum()

void QAbstractSlider::setMinimum ( int min )

Definition at line 332 of file qabstractslider.cpp.

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◆ setOrientation

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

slot

Definition at line 300 of file qabstractslider.cpp.

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◆ setPageStep()

void QAbstractSlider::setPageStep ( int step )

Definition at line 413 of file qabstractslider.cpp.

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◆ setRange

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, min becomes the only legal value.

See also: minimum, maximum

Definition at line 243 of file qabstractslider.cpp.

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◆ setRepeatAction()

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

protected

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

See also: triggerAction(), repeatAction()

Definition at line 645 of file qabstractslider.cpp.

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◆ setSingleStep()

void QAbstractSlider::setSingleStep ( int step )

Definition at line 384 of file qabstractslider.cpp.

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◆ setSliderDown()

void QAbstractSlider::setSliderDown ( bool down )

Definition at line 461 of file qabstractslider.cpp.

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◆ setSliderPosition()

void QAbstractSlider::setSliderPosition ( int position )

Definition at line 492 of file qabstractslider.cpp.

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◆ setTracking()

void QAbstractSlider::setTracking ( bool enable )

Definition at line 437 of file qabstractslider.cpp.

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◆ setValue

void QAbstractSlider::setValue ( int value )

slot

Definition at line 531 of file qabstractslider.cpp.

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◆ singleStep()

int QAbstractSlider::singleStep ( ) const

Definition at line 396 of file qabstractslider.cpp.

◆ sliderChange()

void QAbstractSlider::sliderChange ( SliderChange change )

protectedvirtual

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

Reimplemented in QScrollBar, and QDial.

Definition at line 692 of file qabstractslider.cpp.

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◆ sliderMoved

void QAbstractSlider::sliderMoved ( int value )

signal

This signal is emitted when sliderDown is true and the slider moves. This usually happens when the user is dragging the slider. The value is the new slider position.

This signal is emitted even when tracking is turned off.

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

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◆ sliderPosition()

int QAbstractSlider::sliderPosition ( ) const

Definition at line 507 of file qabstractslider.cpp.

◆ sliderPressed

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()

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◆ sliderReleased

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

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◆ timerEvent()

void QAbstractSlider::timerEvent ( QTimerEvent * e )

overrideprotectedvirtual

\reimp

Reimplemented from QObject.

Definition at line 668 of file qabstractslider.cpp.

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◆ triggerAction()

void QAbstractSlider::triggerAction ( SliderAction action )

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

See also: actionTriggered()

Definition at line 608 of file qabstractslider.cpp.

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◆ value()

int QAbstractSlider::value ( ) const

Definition at line 525 of file qabstractslider.cpp.

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◆ valueChanged

void QAbstractSlider::valueChanged ( int value )

signal

This signal is emitted when the slider value has changed, with the new slider value as argument.

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Property Documentation

◆ invertedAppearance

QAbstractSlider::invertedAppearance

readwrite

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.

Note: 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.

Definition at line 163 of file qabstractslider.h.

◆ invertedControls

QAbstractSlider::invertedControls

readwrite

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.

Definition at line 163 of file qabstractslider.h.

◆ maximum

QAbstractSlider::maximum

readwrite

the slider's maximum value

When setting this property, the \l 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.

Definition at line 163 of file qabstractslider.h.

◆ minimum

QAbstractSlider::minimum

readwrite

the sliders's minimum value

When setting this property, the \l 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.

Definition at line 163 of file qabstractslider.h.

◆ orientation

QAbstractSlider::orientation

readwrite

the orientation of the slider

The orientation must be \l Qt::Vertical (the default) or \l Qt::Horizontal.

Definition at line 163 of file qabstractslider.h.

◆ pageStep

QAbstractSlider::pageStep

readwrite

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

Definition at line 163 of file qabstractslider.h.

◆ singleStep

QAbstractSlider::singleStep

readwrite

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

Definition at line 163 of file qabstractslider.h.

◆ sliderDown

QAbstractSlider::sliderDown

readwrite

whether the slider is pressed down.

The property is set by subclasses in order to let the abstract slider know whether or not \l tracking has any effect.

Changing the slider down property emits the sliderPressed() and sliderReleased() signals.

Definition at line 163 of file qabstractslider.h.

◆ sliderPosition

QAbstractSlider::sliderPosition

readwrite

the current slider position

If \l tracking is enabled (the default), this is identical to \l value.

Definition at line 163 of file qabstractslider.h.

◆ tracking

QAbstractSlider::tracking

readwrite

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

Definition at line 163 of file qabstractslider.h.

◆ value

QAbstractSlider::value

readwrite

the slider's current value

The slider forces the value to be within the legal range: \l minimum <= value <= \l maximum.

Changing the value also changes the \l sliderPosition.

Definition at line 163 of file qabstractslider.h.

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

src/widgets/widgets/qabstractslider.h
src/widgets/widgets/qabstractslider.cpp

Public Types

Public Slots

Signals

Public Member Functions

Protected Types

Protected Member Functions

Properties

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ SliderAction

◆ SliderChange

Constructor & Destructor Documentation

◆ QAbstractSlider() [1/2]

◆ ~QAbstractSlider()

◆ QAbstractSlider() [2/2]

Member Function Documentation

◆ actionTriggered

◆ changeEvent()

◆ event()

◆ hasTracking()

◆ invertedAppearance()

◆ invertedControls()

◆ isSliderDown()

◆ keyPressEvent()

◆ maximum()

◆ minimum()

◆ orientation()

◆ pageStep()

◆ rangeChanged

◆ repeatAction()

◆ setInvertedAppearance()

◆ setInvertedControls()

◆ setMaximum()

◆ setMinimum()

◆ setOrientation

◆ setPageStep()

◆ setRange

◆ setRepeatAction()

◆ setSingleStep()

◆ setSliderDown()

◆ setSliderPosition()

◆ setTracking()

◆ setValue

◆ singleStep()

◆ sliderChange()

◆ sliderMoved

◆ sliderPosition()

◆ sliderPressed

◆ sliderReleased

◆ timerEvent()

◆ triggerAction()

◆ value()

◆ valueChanged

Property Documentation

◆ invertedAppearance

◆ invertedControls

◆ maximum

◆ minimum

◆ orientation

◆ pageStep

◆ singleStep

◆ sliderDown

◆ sliderPosition

◆ tracking

◆ value