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 }
	\value SliderNoAction \value SliderSingleStepAdd \value SliderSingleStepSub \value SliderPageStepAdd \value SliderPageStepSub \value SliderToMinimum \value SliderToMaximum \value SliderMove More...

Public Types inherited from QWidget
enum	RenderFlag { DrawWindowBackground = 0x1 , DrawChildren = 0x2 , IgnoreMask = 0x4 }
	This enum describes how to render the widget when calling QWidget::render(). More...

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

Public Slots
void	setValue (int)

void	setOrientation (Qt::Orientation)

void	setRange (int min, int max)
	Sets the slider's minimum to min and its maximum to max.

Public Slots inherited from QWidget
void	setEnabled (bool)

void	setDisabled (bool)
	Disables widget input events if disable is true; otherwise enables input events.

void	setWindowModified (bool)

void	setWindowTitle (const QString &)

void	setStyleSheet (const QString &styleSheet)

void	setFocus ()
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Gives the keyboard input focus to this widget (or its focus proxy) if this widget or one of its parents is the \l{isActiveWindow()}{active window}.

void	update ()
	Updates the widget unless updates are disabled or the widget is hidden.

void	repaint ()
	Repaints the widget directly by calling paintEvent() immediately, unless updates are disabled or the widget is hidden.

virtual void	setVisible (bool visible)

void	setHidden (bool hidden)
	Convenience function, equivalent to setVisible(!hidden).

void	show ()
	Shows the widget and its child widgets.

void	hide ()
	Hides the widget.

void	showMinimized ()
	Shows the widget minimized, as an icon.

void	showMaximized ()
	Shows the widget maximized.

void	showFullScreen ()
	Shows the widget in full-screen mode.

void	showNormal ()
	Restores the widget after it has been maximized or minimized.

bool	close ()
	Closes this widget.

void	raise ()
	Raises this widget to the top of the parent widget's stack.

void	lower ()
	Lowers the widget to the bottom of the parent widget's stack.

Public Slots inherited from QObject
void	deleteLater ()
	\threadsafe

Signals
void	valueChanged (int value)
	This signal is emitted when the slider value has changed, with the new slider value as argument.

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

void	sliderMoved (int position)
	This signal is emitted when sliderDown is true and the slider moves.

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

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

void	actionTriggered (int action)
	This signal is emitted when the slider action action is triggered.

Signals inherited from QWidget
void	windowTitleChanged (const QString &title)
	This signal is emitted when the window's title has changed, with the new title as an argument.

void	windowIconChanged (const QIcon &icon)
	This signal is emitted when the window's icon has changed, with the new icon as an argument.

void	windowIconTextChanged (const QString &iconText)
	This signal is emitted when the window's icon text has changed, with the new iconText as an argument.

void	customContextMenuRequested (const QPoint &pos)
	This signal is emitted when the widget's \l contextMenuPolicy is Qt::CustomContextMenu, and the user has requested a context menu on the widget.

Signals inherited from QObject
void	destroyed (QObject *=nullptr)
	This signal is emitted immediately before the object obj is destroyed, after any instances of QPointer have been notified, and cannot be blocked.

void	objectNameChanged (const QString &objectName, QPrivateSignal)
	This signal is emitted after the object's name has been changed.

Public Member Functions
	QAbstractSlider (QWidget *parent=nullptr)
	Constructs an abstract slider.

	~QAbstractSlider ()
	Destroys the slider.

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)
	Triggers a slider action.

Public Member Functions inherited from QWidget
	QWidget (QWidget *parent=nullptr, Qt::WindowFlags f=Qt::WindowFlags())
	Constructs a widget which is a child of parent, with widget flags set to f.

	~QWidget ()
	Destroys the widget.

int	devType () const override

WId	winId () const
	Returns the window system identifier of the widget.

void	createWinId ()

WId	internalWinId () const

WId	effectiveWinId () const

QStyle *	style () const

void	setStyle (QStyle *)
	Sets the widget's GUI style to style.

bool	isWindow () const
	Returns `true` if the widget is an independent window, otherwise returns `false`.

bool	isModal () const

Qt::WindowModality	windowModality () const

void	setWindowModality (Qt::WindowModality windowModality)

bool	isEnabled () const

bool	isEnabledTo (const QWidget *) const
	Returns `true` if this widget would become enabled if ancestor is enabled; otherwise returns `false`.

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)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.This function corresponds to setMinimumSize(QSize(minw, minh)).

void	setMaximumSize (const QSize &)

void	setMaximumSize (int maxw, int maxh)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.This function corresponds to setMaximumSize(QSize(maxw, 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)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Sets the x (width) size increment to w and the y (height) size increment to h.

QSize	baseSize () const

void	setBaseSize (const QSize &)

void	setBaseSize (int basew, int baseh)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.This corresponds to setBaseSize(QSize(basew, baseh)).

void	setFixedSize (const QSize &)
	Sets both the minimum and maximum sizes of the widget to s, thereby preventing it from ever growing or shrinking.

void	setFixedSize (int w, int h)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Sets the width of the widget to w and the height to h.

void	setFixedWidth (int w)
	Sets both the minimum and maximum width of the widget to w without changing the heights.

void	setFixedHeight (int h)
	Sets both the minimum and maximum heights of the widget to h without changing the widths.

QPointF	mapToGlobal (const QPointF &) const
	Translates the widget coordinate pos to global screen coordinates.

QPoint	mapToGlobal (const QPoint &) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

QPointF	mapFromGlobal (const QPointF &) const
	Translates the global screen coordinate pos to widget coordinates.

QPoint	mapFromGlobal (const QPoint &) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

QPointF	mapToParent (const QPointF &) const
	Translates the widget coordinate pos to a coordinate in the parent widget.

QPoint	mapToParent (const QPoint &) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

QPointF	mapFromParent (const QPointF &) const
	Translates the parent widget coordinate pos to widget coordinates.

QPoint	mapFromParent (const QPoint &) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

QPointF	mapTo (const QWidget *, const QPointF &) const
	Translates the widget coordinate pos to the coordinate system of parent.

QPoint	mapTo (const QWidget *, const QPoint &) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

QPointF	mapFrom (const QWidget *, const QPointF &) const
	Translates the widget coordinate pos from the coordinate system of parent to this widget's coordinate system.

QPoint	mapFrom (const QWidget *, const QPoint &) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

QWidget *	window () const
	Returns the window for this widget, i.e.

QWidget *	nativeParentWidget () const

QWidget *	topLevelWidget () const

const QPalette &	palette () const

void	setPalette (const QPalette &)

void	setBackgroundRole (QPalette::ColorRole)
	Sets the background role of the widget to role.

QPalette::ColorRole	backgroundRole () const
	Returns the background role of the widget.

void	setForegroundRole (QPalette::ColorRole)
	Sets the foreground role of the widget to role.

QPalette::ColorRole	foregroundRole () const
	Returns the foreground role.

const QFont &	font () const

void	setFont (const QFont &)

QFontMetrics	fontMetrics () const
	Returns the font metrics for the widget's current font.

QFontInfo	fontInfo () const
	Returns the font info for the widget's current font.

QCursor	cursor () const

void	setCursor (const QCursor &)

void	unsetCursor ()

void	setMouseTracking (bool enable)

bool	hasMouseTracking () const

bool	underMouse () const
	Returns `true` if the widget is under the mouse cursor; otherwise returns `false`.

void	setTabletTracking (bool enable)

bool	hasTabletTracking () const

void	setMask (const QBitmap &)
	Causes only the pixels of the widget for which bitmap has a corresponding 1 bit to be visible.

void	setMask (const QRegion &)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Causes only the parts of the widget which overlap region to be visible.

QRegion	mask () const
	Returns the mask currently set on a widget.

void	clearMask ()
	Removes any mask set by setMask().

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))
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Renders the widget into the painter's QPainter::device().

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

void	grabGesture (Qt::GestureType type, Qt::GestureFlags flags=Qt::GestureFlags())
	Subscribes the widget to a given gesture with specific flags.

void	ungrabGesture (Qt::GestureType type)
	Unsubscribes the widget from a given gesture 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 &)
	Sets the window's role to role.

QString	windowRole () const
	Returns the window's role, or an empty string.

void	setWindowFilePath (const QString &filePath)

QString	windowFilePath () const

void	setWindowOpacity (qreal level)

qreal	windowOpacity () const

bool	isWindowModified () const

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 ()
	Sets the top-level widget containing this widget to be the active window.

void	clearFocus ()
	Takes keyboard input focus from the widget.

void	setFocus (Qt::FocusReason reason)
	Gives the keyboard input focus to this widget (or its focus proxy) if this widget or one of its parents is the \l{isActiveWindow()}{active window}.

Qt::FocusPolicy	focusPolicy () const

void	setFocusPolicy (Qt::FocusPolicy policy)

bool	hasFocus () const

void	setFocusProxy (QWidget *)
	Sets the widget's focus proxy to widget w.

QWidget *	focusProxy () const
	Returns the focus proxy, or \nullptr if there is no focus proxy.

Qt::ContextMenuPolicy	contextMenuPolicy () const

void	setContextMenuPolicy (Qt::ContextMenuPolicy policy)

void	grabMouse ()
	Grabs the mouse input.

void	grabMouse (const QCursor &)

void	releaseMouse ()
	Releases the mouse grab.

void	grabKeyboard ()
	Grabs the keyboard input.

void	releaseKeyboard ()
	Releases the keyboard grab.

int	grabShortcut (const QKeySequence &key, Qt::ShortcutContext context=Qt::WindowShortcut)
	Adds a shortcut to Qt's shortcut system that watches for the given key sequence in the given context.

void	releaseShortcut (int id)
	Removes the shortcut with the given id from Qt's shortcut system.

void	setShortcutEnabled (int id, bool enable=true)
	If enable is true, the shortcut with the given id is enabled; otherwise the shortcut is disabled.

void	setShortcutAutoRepeat (int id, bool enable=true)

bool	updatesEnabled () const

void	setUpdatesEnabled (bool enable)

void	update (int x, int y, int w, int h)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.This version updates a rectangle (x, y, w, h) inside the widget.

void	update (const QRect &)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.This version updates a rectangle rect inside the widget.

void	update (const QRegion &)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.This version repaints a region rgn inside the widget.

void	repaint (int x, int y, int w, int h)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.This version repaints a rectangle (x, y, w, h) inside the widget.

void	repaint (const QRect &)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.This version repaints a rectangle rect inside the widget.

void	repaint (const QRegion &)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.This version repaints a region rgn inside the widget.

void	stackUnder (QWidget *)
	Places the widget under w in the parent widget's stack.

void	move (int x, int y)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.This corresponds to move(QPoint(x, y)).

void	move (const QPoint &)

void	resize (int w, int h)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.This corresponds to resize(QSize(w, h)).

void	resize (const QSize &)

void	setGeometry (int x, int y, int w, int h)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.This corresponds to setGeometry(QRect(x, y, w, h)).

void	setGeometry (const QRect &)

QByteArray	saveGeometry () const

bool	restoreGeometry (const QByteArray &geometry)

void	adjustSize ()
	Adjusts the size of the widget to fit its contents.

bool	isVisible () const

bool	isVisibleTo (const QWidget *) const
	Returns `true` if this widget would become visible if ancestor is shown; otherwise returns `false`.

bool	isHidden () const
	Returns `true` if the widget is hidden, otherwise returns `false`.

bool	isMinimized () const

bool	isMaximized () const

bool	isFullScreen () const

Qt::WindowStates	windowState () const
	Returns the current window state.

void	setWindowState (Qt::WindowStates state)
	Sets the window state to windowState.

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)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Sets the size policy of the widget to horizontal and vertical, with standard stretch and no height-for-width.

virtual int	heightForWidth (int) const
	Returns the preferred height for this widget, given the width w.

virtual bool	hasHeightForWidth () const

QRegion	visibleRegion () const
	Returns the unobscured region where paint events can occur.

void	setContentsMargins (int left, int top, int right, int bottom)
	Sets the margins around the contents of the widget to have the sizes left, top, right, and bottom.

void	setContentsMargins (const QMargins &margins)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

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

QRect	contentsRect () const
	Returns the area inside the widget's margins.

QLayout *	layout () const
	Returns the layout manager that is installed on this widget, or \nullptr if no layout manager is installed.

void	setLayout (QLayout *)
	Sets the layout manager for this widget to layout.

void	updateGeometry ()
	Notifies the layout system that this widget has changed and may need to change geometry.

void	setParent (QWidget *parent)
	Sets the parent of the widget to parent, and resets the window flags.

void	setParent (QWidget *parent, Qt::WindowFlags f)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.This function also takes widget flags, f as an argument.

void	scroll (int dx, int dy)
	Scrolls the widget including its children dx pixels to the right and dy downward.

void	scroll (int dx, int dy, const QRect &)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.This version only scrolls r and does not move the children of the widget.

QWidget *	focusWidget () const
	Returns the last child of this widget that setFocus had been called on.

QWidget *	nextInFocusChain () const
	Returns the next widget in this widget's focus chain.

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

bool	acceptDrops () const

void	setAcceptDrops (bool on)

void	addAction (QAction *action)
	Appends the action action to this widget's list of actions.

void	addActions (const QList< QAction * > &actions)
	Appends the actions actions to this widget's list of actions.

void	insertActions (QAction before, const QList< QAction > &actions)
	Inserts the actions actions to this widget's list of actions, before the action before.

void	insertAction (QAction before, QAction action)
	Inserts the action action to this widget's list of actions, before the action before.

void	removeAction (QAction *action)
	Removes the action action from this widget's list of actions.

QList< QAction * >	actions () const
	Returns the (possibly empty) list of this widget's actions.

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
	Returns the parent of this widget, or \nullptr if it does not have any parent widget.

void	setWindowFlags (Qt::WindowFlags type)

Qt::WindowFlags	windowFlags () const
	Window flags are a combination of a type (e.g.

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

void	overrideWindowFlags (Qt::WindowFlags type)
	Sets the window flags for the widget to flags, without telling the window system.

Qt::WindowType	windowType () const
	Returns the window type of this widget.

QWidget *	childAt (int x, int y) const
	Returns the visible child widget at the position ({x}, {y}) in the widget's coordinate system.

QWidget *	childAt (const QPoint &p) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Returns the visible child widget at point p in the widget's own coordinate system.

QWidget *	childAt (const QPointF &p) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

void	setAttribute (Qt::WidgetAttribute, bool on=true)
	Sets the attribute attribute on this widget if on is true; otherwise clears the attribute.

bool	testAttribute (Qt::WidgetAttribute) const
	Returns `true` if attribute attribute is set on this widget; otherwise returns `false`.

QPaintEngine *	paintEngine () const override
	Returns the widget's paint engine.

void	ensurePolished () const
	Ensures that the widget and its children have been polished by QStyle (i.e., have a proper font and palette).

bool	isAncestorOf (const QWidget *child) const
	Returns `true` if this widget is a parent, (or grandparent and so on to any level), of the given child, and both widgets are within the same window; otherwise returns `false`.

bool	autoFillBackground () const

void	setAutoFillBackground (bool enabled)

QBackingStore *	backingStore () const

QWindow *	windowHandle () const
	If this is a native widget, return the associated QWindow.

QScreen *	screen () const
	Returns the screen the widget is on.

void	setScreen (QScreen *)
	Sets the screen on which the widget should be shown to screen.

virtual QVariant	inputMethodQuery (Qt::InputMethodQuery) const
	This method is only relevant for input widgets.

Qt::InputMethodHints	inputMethodHints () const

void	setInputMethodHints (Qt::InputMethodHints hints)

Public Member Functions inherited from QObject
Q_INVOKABLE	QObject (QObject *parent=nullptr)
	Constructs an object with parent object parent.

virtual	~QObject ()
	Destroys the object, deleting all its child objects.

virtual bool	eventFilter (QObject watched, QEvent event)
	Filters events if this object has been installed as an event filter for the watched object.

QString	objectName () const

Q_WEAK_OVERLOAD void	setObjectName (const QString &name)
	Sets the object's name to name.

void	setObjectName (QAnyStringView name)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

QBindable< QString >	bindableObjectName ()

bool	isWidgetType () const
	Returns `true` if the object is a widget; otherwise returns `false`.

bool	isWindowType () const
	Returns `true` if the object is a window; otherwise returns `false`.

bool	isQuickItemType () const
	Returns `true` if the object is a QQuickItem; otherwise returns `false`.

bool	signalsBlocked () const noexcept
	Returns `true` if signals are blocked; otherwise returns `false`.

bool	blockSignals (bool b) noexcept
	If block is true, signals emitted by this object are blocked (i.e., emitting a signal will not invoke anything connected to it).

QThread *	thread () const
	Returns the thread in which the object lives.

bool	moveToThread (QThread *thread QT6_DECL_NEW_OVERLOAD_TAIL)
	Changes the thread affinity for this object and its children and returns `true` on success.

int	startTimer (int interval, Qt::TimerType timerType=Qt::CoarseTimer)
	This is an overloaded function that will start a timer of type timerType and a timeout of interval milliseconds.

int	startTimer (std::chrono::nanoseconds time, Qt::TimerType timerType=Qt::CoarseTimer)

void	killTimer (int id)
	Kills the timer with timer identifier, id.

void	killTimer (Qt::TimerId id)

template<typename T >
T	findChild (QAnyStringView aName, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
	Returns the child of this object that can be cast into type T and that is called name, or \nullptr if there is no such object.

template<typename T >
QList< T >	findChildren (QAnyStringView aName, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
	Returns all children of this object with the given name that can be cast to type T, or an empty list if there are no such objects.

template<typename T >
T	findChild (Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

template<typename T >
QList< T >	findChildren (Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

const QObjectList &	children () const
	Returns a list of child objects.

void	setParent (QObject *parent)
	Makes the object a child of parent.

void	installEventFilter (QObject *filterObj)
	Installs an event filter filterObj on this object.

void	removeEventFilter (QObject *obj)
	Removes an event filter object obj from this object.

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
	Dumps a tree of children to the debug output.

void	dumpObjectInfo () const
	Dumps information about signal connections, etc.

bool	setProperty (const char *name, const QVariant &value)
	Sets the value of the object's name property to value.

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

QVariant	property (const char *name) const
	Returns the value of the object's name property.

QList< QByteArray >	dynamicPropertyNames () const

QBindingStorage *	bindingStorage ()

const QBindingStorage *	bindingStorage () const

QObject *	parent () const
	Returns a pointer to the parent object.

bool	inherits (const char *classname) const
	Returns `true` if this object is an instance of a class that inherits className or a QObject subclass that inherits className; otherwise returns `false`.

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 }
	\value SliderRangeChange \value SliderOrientationChange \value SliderStepsChange \value SliderValueChange More...

Protected Member Functions
bool	event (QEvent *e) override
	\reimp

void	setRepeatAction (SliderAction action, int thresholdTime=500, int repeatTime=50)
	Sets action action to be triggered repetitively in intervals of repeatTime, after an initial delay of thresholdTime.

SliderAction	repeatAction () const
	Returns the current repeat action.

virtual void	sliderChange (SliderChange change)
	Reimplement this virtual function to track slider changes such as \l SliderRangeChange, \l SliderOrientationChange, \l SliderStepsChange, or \l SliderValueChange.

void	keyPressEvent (QKeyEvent *ev) override
	\reimp

void	timerEvent (QTimerEvent *) override
	\reimp

void	changeEvent (QEvent *e) override
	\reimp

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

Protected Member Functions inherited from QWidget
bool	event (QEvent *event) override
	This is the main event handler; it handles event event.

virtual void	mousePressEvent (QMouseEvent *event)
	This event handler, for event event, can be reimplemented in a subclass to receive mouse press events for the widget.

virtual void	mouseReleaseEvent (QMouseEvent *event)
	This event handler, for event event, can be reimplemented in a subclass to receive mouse release events for the widget.

virtual void	mouseDoubleClickEvent (QMouseEvent *event)
	This event handler, for event event, can be reimplemented in a subclass to receive mouse double click events for the widget.

virtual void	mouseMoveEvent (QMouseEvent *event)
	This event handler, for event event, can be reimplemented in a subclass to receive mouse move events for the widget.

virtual void	keyReleaseEvent (QKeyEvent *event)
	This event handler, for event event, can be reimplemented in a subclass to receive key release events for the widget.

virtual void	focusInEvent (QFocusEvent *event)
	This event handler can be reimplemented in a subclass to receive keyboard focus events (focus received) for the widget.

virtual void	focusOutEvent (QFocusEvent *event)
	This event handler can be reimplemented in a subclass to receive keyboard focus events (focus lost) for the widget.

virtual void	enterEvent (QEnterEvent *event)
	This event handler can be reimplemented in a subclass to receive widget enter events which are passed in the event parameter.

virtual void	leaveEvent (QEvent *event)
	This event handler can be reimplemented in a subclass to receive widget leave events which are passed in the event parameter.

virtual void	paintEvent (QPaintEvent *event)
	This event handler can be reimplemented in a subclass to receive paint events passed in event.

virtual void	moveEvent (QMoveEvent *event)
	This event handler can be reimplemented in a subclass to receive widget move events which are passed in the event parameter.

virtual void	resizeEvent (QResizeEvent *event)
	This event handler can be reimplemented in a subclass to receive widget resize events which are passed in the event parameter.

virtual void	closeEvent (QCloseEvent *event)
	This event handler is called with the given event when Qt receives a window close request for a top-level widget from the window system.

virtual void	contextMenuEvent (QContextMenuEvent *event)
	This event handler, for event event, can be reimplemented in a subclass to receive widget context menu events.

virtual void	actionEvent (QActionEvent *event)
	This event handler is called with the given event whenever the widget's actions are changed.

virtual void	showEvent (QShowEvent *event)
	This event handler can be reimplemented in a subclass to receive widget show events which are passed in the event parameter.

virtual void	hideEvent (QHideEvent *event)
	This event handler can be reimplemented in a subclass to receive widget hide events.

virtual bool	nativeEvent (const QByteArray &eventType, void message, qintptr result)
	This special event handler can be reimplemented in a subclass to receive native platform events identified by eventType which are passed in the message parameter.

int	metric (PaintDeviceMetric) const override
	Internal implementation of the virtual QPaintDevice::metric() function.

void	initPainter (QPainter *painter) const override
	Initializes the painter pen, background and font to the same as the given widget's.

QPaintDevice *	redirected (QPoint *offset) const override

QPainter *	sharedPainter () const override

virtual void	inputMethodEvent (QInputMethodEvent *)
	This event handler, for event event, can be reimplemented in a subclass to receive Input Method composition events.

void	create (WId=0, bool initializeWindow=true, bool destroyOldWindow=true)
	Creates a new widget window.

void	destroy (bool destroyWindow=true, bool destroySubWindows=true)
	Frees up window system resources.

virtual bool	focusNextPrevChild (bool next)
	Finds a new widget to give the keyboard focus to, as appropriate for Tab and Shift+Tab, and returns `true` if it can find a new widget, or false if it can't.

bool	focusNextChild ()
	Finds a new widget to give the keyboard focus to, as appropriate for \uicontrol Tab, and returns `true` if it can find a new widget, or false if it can't.

bool	focusPreviousChild ()
	Finds a new widget to give the keyboard focus to, as appropriate for \uicontrol Shift+Tab, and returns `true` if it can find a new widget, or false if it can't.

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

Protected Member Functions inherited from QObject
QObject *	sender () const
	Returns a pointer to the object that sent the signal, if called in a slot activated by a signal; otherwise it returns \nullptr.

int	senderSignalIndex () const

int	receivers (const char *signal) const
	Returns the number of receivers connected to the signal.

bool	isSignalConnected (const QMetaMethod &signal) const

virtual void	childEvent (QChildEvent *event)
	This event handler can be reimplemented in a subclass to receive child events.

virtual void	customEvent (QEvent *event)
	This event handler can be reimplemented in a subclass to receive custom events.

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

double	getDecodedMetricF (PaintDeviceMetric metricA, PaintDeviceMetric metricB) const

Properties
int	minimum
	the sliders's minimum value

int	maximum
	the slider's maximum value

int	singleStep
	the single step.

int	pageStep
	the page step.

int	value
	the slider's current value

int	sliderPosition
	the current slider position

bool	tracking
	whether slider tracking is enabled

Qt::Orientation	orientation
	the orientation of the slider

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

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

bool	sliderDown
	whether the slider is pressed down.

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

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

bool	enabled
	whether the widget is enabled

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

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

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

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

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

QPoint	pos
	the position of the widget within its parent widget

QSize	frameSize
	the size of the widget including any window frame

QSize	size
	the size of the widget excluding any window frame

int	width
	the width of the widget excluding any window frame

int	height
	the height of the widget excluding any window frame

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

QRect	childrenRect
	the bounding rectangle of the widget's children

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

QSizePolicy	sizePolicy
	the default layout behavior of the widget

QSize	minimumSize
	the widget's minimum size

QSize	maximumSize
	the widget's maximum size in pixels

int	minimumWidth
	the widget's minimum width in pixels

int	minimumHeight
	the widget's minimum height in pixels

int	maximumWidth
	the widget's maximum width in pixels

int	maximumHeight
	the widget's maximum height in pixels

QSize	sizeIncrement
	the size increment of the widget

QSize	baseSize
	the base size of the widget

QPalette	palette
	the widget's palette

QFont	font
	the font currently set for the widget

QCursor	cursor
	the cursor shape for this widget

bool	mouseTracking
	whether mouse tracking is enabled for the widget

bool	tabletTracking
	whether tablet tracking is enabled for the widget

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

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

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

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

bool	updatesEnabled
	whether updates are enabled

bool	visible
	whether the widget is visible

bool	minimized
	whether this widget is minimized (iconified)

bool	maximized
	whether this widget is maximized

bool	fullScreen
	whether the widget is shown in full screen mode

QSize	sizeHint
	the recommended size for the widget

QSize	minimumSizeHint
	the recommended minimum size for the widget

bool	acceptDrops
	whether drop events are enabled for this widget

QString	windowTitle
	the window title (caption)

QIcon	windowIcon
	the widget's icon

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

double	windowOpacity
	The level of opacity for the window.

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

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

bool	autoFillBackground
	whether the widget background is filled automatically

QString	styleSheet
	the widget's style sheet

QLocale	locale
	the widget's locale

QString	windowFilePath
	the file path associated with a widget

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

Properties inherited from QObject
QString	objectName
	the name of this object

Additional Inherited Members
Static Public Member Functions inherited from QWidget
static void	setTabOrder (QWidget , QWidget )
	Puts the second widget after the first widget in the focus order.

static void	setTabOrder (std::initializer_list< QWidget * > widgets)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

static QWidget *	mouseGrabber ()
	Returns the widget that is currently grabbing the mouse input.

static QWidget *	keyboardGrabber ()
	Returns the widget that is currently grabbing the keyboard input.

static QWidget *	find (WId)
	Returns a pointer to the widget with window identifier/handle id.

static QWidget *	createWindowContainer (QWindow window, QWidget parent=nullptr, Qt::WindowFlags flags=Qt::WindowFlags())
	Creates a QWidget that makes it possible to embed window into a QWidget-based application.

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)
	\threadsafe

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::ContextTypeForFunctor< Func2 >::ContextType context, Func2 &&slot, Qt::ConnectionType type=Qt::AutoConnection)

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

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

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

static bool	disconnect (const QMetaObject::Connection &)
	Disconnect a 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 ()

static int	encodeMetricF (PaintDeviceMetric metric, double value)

Protected Slots inherited from QWidget
void	updateMicroFocus (Qt::InputMethodQuery query=Qt::ImQueryAll)
	Updates the widget's micro focus and informs input methods that the state specified by query has changed.

Protected Attributes inherited from QObject
QScopedPointer< QObjectData >	d_ptr

Protected Attributes inherited from QPaintDevice
ushort	painters

Related Symbols inherited from QWidget
	setupUi (QWidget *widget)
	\macro QWIDGETSIZE_MAX

Related Symbols inherited from QObject
template< class T > T	qobject_cast (const QObject *object)
	Returns the given object cast to type T if the object is of type T (or of a subclass); otherwise returns \nullptr.

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

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

	QObjectList
	\macro Q_CLASSINFO(Name, Value)

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 17 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 66 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 103 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 239 of file qabstractslider.cpp.

◆ ~QAbstractSlider()

QAbstractSlider::~QAbstractSlider ( )

Destroys the slider.

Definition at line 253 of file qabstractslider.cpp.

◆ QAbstractSlider() [2/2]

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

protected

Definition at line 245 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()

◆ changeEvent()

void QAbstractSlider::changeEvent ( QEvent * e )

overrideprotectedvirtual

\reimp

Reimplemented from QWidget.

Definition at line 893 of file qabstractslider.cpp.

◆ event()

bool QAbstractSlider::event ( QEvent * e )

overrideprotectedvirtual

\reimp

Reimplemented from QObject.

Reimplemented in QDial, QScrollBar, and QSlider.

Definition at line 911 of file qabstractslider.cpp.

◆ hasTracking()

bool QAbstractSlider::hasTracking ( ) const

Definition at line 407 of file qabstractslider.cpp.

◆ invertedAppearance()

bool QAbstractSlider::invertedAppearance ( ) const

Definition at line 536 of file qabstractslider.cpp.

◆ invertedControls()

bool QAbstractSlider::invertedControls ( ) const

Definition at line 560 of file qabstractslider.cpp.

◆ isSliderDown()

bool QAbstractSlider::isSliderDown ( ) const

Definition at line 443 of file qabstractslider.cpp.

◆ keyPressEvent()

void QAbstractSlider::keyPressEvent ( QKeyEvent * ev )

overrideprotectedvirtual

\reimp

Reimplemented from QWidget.

Definition at line 748 of file qabstractslider.cpp.

◆ maximum()

int QAbstractSlider::maximum ( ) const

Definition at line 326 of file qabstractslider.cpp.

◆ minimum()

int QAbstractSlider::minimum ( ) const

Definition at line 302 of file qabstractslider.cpp.

◆ orientation()

Qt::Orientation QAbstractSlider::orientation ( ) const

Definition at line 279 of file qabstractslider.cpp.

◆ pageStep()

int QAbstractSlider::pageStep ( ) const

Definition at line 384 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 631 of file qabstractslider.cpp.

◆ setInvertedAppearance()

void QAbstractSlider::setInvertedAppearance ( bool invert )

Definition at line 542 of file qabstractslider.cpp.

◆ setInvertedControls()

void QAbstractSlider::setInvertedControls ( bool invert )

Definition at line 566 of file qabstractslider.cpp.

◆ setMaximum()

void QAbstractSlider::setMaximum ( int max )

Definition at line 320 of file qabstractslider.cpp.

◆ setMinimum()

void QAbstractSlider::setMinimum ( int min )

Definition at line 296 of file qabstractslider.cpp.

◆ setOrientation

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

slot

Definition at line 264 of file qabstractslider.cpp.

◆ setPageStep()

void QAbstractSlider::setPageStep ( int step )

Definition at line 377 of file qabstractslider.cpp.

◆ 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 207 of file qabstractslider.cpp.

◆ 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 616 of file qabstractslider.cpp.

◆ setSingleStep()

void QAbstractSlider::setSingleStep ( int step )

Definition at line 348 of file qabstractslider.cpp.

◆ setSliderDown()

void QAbstractSlider::setSliderDown ( bool down )

Definition at line 425 of file qabstractslider.cpp.

◆ setSliderPosition()

void QAbstractSlider::setSliderPosition ( int position )

Definition at line 456 of file qabstractslider.cpp.

◆ setTracking()

void QAbstractSlider::setTracking ( bool enable )

Definition at line 401 of file qabstractslider.cpp.

◆ setValue

void QAbstractSlider::setValue ( int value )

slot

Definition at line 495 of file qabstractslider.cpp.

◆ singleStep()

int QAbstractSlider::singleStep ( ) const

Definition at line 360 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 QDial, and QScrollBar.

Definition at line 663 of file qabstractslider.cpp.

◆ 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()

◆ sliderPosition()

int QAbstractSlider::sliderPosition ( ) const

Definition at line 471 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()

◆ 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

◆ timerEvent()

void QAbstractSlider::timerEvent ( QTimerEvent * e )

overrideprotectedvirtual

\reimp

Reimplemented from QObject.

Definition at line 639 of file qabstractslider.cpp.

◆ 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 579 of file qabstractslider.cpp.

◆ value()

int QAbstractSlider::value ( ) const

Definition at line 489 of file qabstractslider.cpp.

◆ valueChanged

void QAbstractSlider::valueChanged ( int value )

signal

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

Property Documentation

◆ invertedAppearance

bool 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 29 of file qabstractslider.h.

◆ invertedControls

bool 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 30 of file qabstractslider.h.

◆ maximum

int 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 22 of file qabstractslider.h.

◆ minimum

int 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 21 of file qabstractslider.h.

◆ orientation

Qt::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 28 of file qabstractslider.h.

◆ pageStep

int 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 24 of file qabstractslider.h.

◆ singleStep

int 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 23 of file qabstractslider.h.

◆ sliderDown

bool 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 31 of file qabstractslider.h.

◆ sliderPosition

int QAbstractSlider::sliderPosition

readwrite

the current slider position

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

Definition at line 26 of file qabstractslider.h.

◆ tracking

bool 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 27 of file qabstractslider.h.

◆ value

int 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 25 of file qabstractslider.h.

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

qtbase/src/widgets/widgets/qabstractslider.h (05fc3aef53348fb58be6308076e000825b704e58)
qtbase/src/widgets/widgets/qabstractslider.cpp (8b84374892512faa43e5deeeef22ca558ac5543a)

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