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

#include <qabstractslider.h>

Inheritance 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 }
	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 }

Public Slots
void	setOrientation (Qt::Orientation)

void	setValue (int)

Public Slots inherited from QWidget
bool	close ()
	Closes this widget. More...

void	hide ()
	Hides the widget. More...

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

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

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

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

void	setEnabled (bool)

void	setFocus ()
	Gives the keyboard input focus to this widget (or its focus proxy) if this widget or one of its parents is the active window. More...

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

QT_MOC_COMPAT void	setShown (bool shown)
	Use setVisible(shown) instead. More...

void	setStyleSheet (const QString &styleSheet)

virtual void	setVisible (bool visible)

void	setWindowModified (bool)

void	setWindowTitle (const QString &)

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

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

void	showMaximized ()
	Shows the widget maximized. More...

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

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

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

Public Slots inherited from QObject
void	deleteLater ()
	Schedules this object for deletion. More...

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

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. More...

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

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

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

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

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

Signals inherited from QObject
void	destroyed (QObject *=0)
	This signal is emitted immediately before the object obj is destroyed, and can not be blocked. More...

Public Functions
bool	hasTracking () const

bool	invertedAppearance () const

bool	invertedControls () const

bool	isSliderDown () const

int	maximum () const

int	minimum () const

Qt::Orientation	orientation () const

int	pageStep () const

	QAbstractSlider (QWidget *parent=0)
	Constructs an abstract slider. More...

void	setInvertedAppearance (bool)

void	setInvertedControls (bool)

void	setMaximum (int)

void	setMinimum (int)

void	setPageStep (int)

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

void	setSingleStep (int)

void	setSliderDown (bool)

void	setSliderPosition (int)

void	setTracking (bool enable)

int	singleStep () const

int	sliderPosition () const

void	triggerAction (SliderAction action)
	Triggers a slider action. More...

int	value () const

	~QAbstractSlider ()
	Destroys the slider. More...

Public Functions inherited from QWidget
bool	acceptDrops () const

QString	accessibleDescription () const

QString	accessibleName () const

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

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

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

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

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

bool	autoFillBackground () const

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

QSize	baseSize () const

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

QWidget *	childAt (const QPoint &p) const
	Returns the visible child widget at point p in the widget's own coordinate system. More...

QRect	childrenRect () const

QRegion	childrenRegion () const

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

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

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

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

Qt::ContextMenuPolicy	contextMenuPolicy () const

void	createWinId ()

QCursor	cursor () const

int	devType () const

WId	effectiveWinId () const
	Returns the effective window system identifier of the widget, i. More...

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

Qt::FocusPolicy	focusPolicy () const

QWidget *	focusProxy () const
	Returns the focus proxy, or 0 if there is no focus proxy. More...

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

const QFont &	font () const

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

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

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

QRect	frameGeometry () const

QSize	frameSize () const

const QRect &	geometry () const

void	getContentsMargins (int left, int top, int right, int bottom) const
	Returns the widget's contents margins for left, top, right, and bottom. More...

HDC	getDC () const
	Returns the window system handle of the widget, for low-level access. More...

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

void	grabKeyboard ()
	Grabs the keyboard input. More...

void	grabMouse ()
	Grabs the mouse input. More...

void	grabMouse (const QCursor &)

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. More...

QGraphicsEffect *	graphicsEffect () const
	The graphicsEffect function returns a pointer to the widget's graphics effect. More...

QGraphicsProxyWidget *	graphicsProxyWidget () const
	Returns the proxy widget for the corresponding embedded widget in a graphics view; otherwise returns 0. More...

bool	hasFocus () const

bool	hasMouseTracking () const

int	height () const

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

QInputContext *	inputContext ()
	This function returns the QInputContext for this widget. More...

Qt::InputMethodHints	inputMethodHints () const

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

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

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

WId	internalWinId () const
	Returns the window system identifier of the widget, or 0 if the widget is not created yet. More...

bool	isActiveWindow () const

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. More...

bool	isEnabled () const

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

bool	isEnabledToTLW () const
	This function is deprecated. More...

bool	isFullScreen () const

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

bool	isLeftToRight () const

bool	isMaximized () const

bool	isMinimized () const

bool	isModal () const

bool	isRightToLeft () const

bool	isTopLevel () const
	Use isWindow() instead. More...

bool	isVisible () const

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

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

bool	isWindowModified () const

QLayout *	layout () const
	Returns the layout manager that is installed on this widget, or 0 if no layout manager is installed. More...

Qt::LayoutDirection	layoutDirection () const

QLocale	locale () const

Qt::HANDLE	macCGHandle () const
	Returns the CoreGraphics handle of the widget. More...

Qt::HANDLE	macQDHandle () const
	Returns the QuickDraw handle of the widget. More...

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

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

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

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

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

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

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

int	maximumHeight () const

QSize	maximumSize () const

int	maximumWidth () const

int	minimumHeight () const

QSize	minimumSize () const

virtual QSize	minimumSizeHint () const

int	minimumWidth () const

void	move (int x, int y)
	This corresponds to move(QPoint(x, y)). More...

void	move (const QPoint &)

QWidget *	nativeParentWidget () const
	Returns the native parent for this widget, i. More...

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

QRect	normalGeometry () const

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

void	overrideWindowState (Qt::WindowStates state)

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

const QPalette &	palette () const

QWidget *	parentWidget () const
	Returns the parent of this widget, or 0 if it does not have any parent widget. More...

QPoint	pos () const

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

	QWidget (QWidget *parent=0, Qt::WindowFlags f=0)
	Constructs a widget which is a child of parent, with widget flags set to f. More...

QRect	rect () const

void	releaseDC (HDC) const
	Releases the HDC hdc acquired by a previous call to getDC(). More...

void	releaseKeyboard ()
	Releases the keyboard grab. More...

void	releaseMouse ()
	Releases the mouse grab. More...

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

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

void	render (QPaintDevice *target, const QPoint &targetOffset=QPoint(), const QRegion &sourceRegion=QRegion(), RenderFlags renderFlags=RenderFlags(DrawWindowBackground\|DrawChildren))
	Renders the sourceRegion of this widget into the target using renderFlags to determine how to render. More...

void	render (QPainter *painter, const QPoint &targetOffset=QPoint(), const QRegion &sourceRegion=QRegion(), RenderFlags renderFlags=RenderFlags(DrawWindowBackground\|DrawChildren))
	Renders the widget into the painter's QPainter::device(). More...

void	repaint (int x, int y, int w, int h)
	This version repaints a rectangle (x, y, w, h) inside the widget. More...

void	repaint (const QRect &)
	This version repaints a rectangle rect inside the widget. More...

void	repaint (const QRegion &)
	This version repaints a region rgn inside the widget. More...

void	resize (int w, int h)
	This corresponds to resize(QSize(w, h)). More...

void	resize (const QSize &)

bool	restoreGeometry (const QByteArray &geometry)
	Restores the geometry and state top-level widgets stored in the byte array geometry. More...

QByteArray	saveGeometry () const
	Saves the current geometry and state for top-level widgets. More...

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

void	scroll (int dx, int dy, const QRect &)
	This version only scrolls r and does not move the children of the widget. More...

void	setAcceptDrops (bool on)

void	setAccessibleDescription (const QString &description)

void	setAccessibleName (const QString &name)

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

void	setAutoFillBackground (bool enabled)

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

void	setBaseSize (const QSize &)

void	setBaseSize (int basew, int baseh)
	This corresponds to setBaseSize(QSize(basew, baseh)). More...

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. More...

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

void	setContextMenuPolicy (Qt::ContextMenuPolicy policy)

void	setCursor (const QCursor &)

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

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

void	setFixedSize (int w, int h)
	Sets the width of the widget to w and the height to h. More...

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

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 active window. More...

void	setFocusPolicy (Qt::FocusPolicy policy)

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

void	setFont (const QFont &)
	Use the single-argument overload instead. More...

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

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)). More...

void	setGeometry (const QRect &)

void	setGraphicsEffect (QGraphicsEffect *effect)
	The setGraphicsEffect function is for setting the widget's graphics effect. More...

void	setInputContext (QInputContext *)
	This function sets the input context context on this widget. More...

void	setInputMethodHints (Qt::InputMethodHints hints)

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

void	setLayoutDirection (Qt::LayoutDirection direction)

void	setLocale (const QLocale &locale)

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

void	setMask (const QRegion &)
	Causes only the parts of the widget which overlap region to be visible. More...

void	setMaximumHeight (int maxh)

void	setMaximumSize (const QSize &)

void	setMaximumSize (int maxw, int maxh)
	This function corresponds to setMaximumSize(QSize(maxw, maxh)). More...

void	setMaximumWidth (int maxw)

void	setMinimumHeight (int minh)

void	setMinimumSize (const QSize &)

void	setMinimumSize (int minw, int minh)
	This function corresponds to setMinimumSize(QSize(minw, minh)). More...

void	setMinimumWidth (int minw)

void	setMouseTracking (bool enable)

void	setPalette (const QPalette &)
	Use the single-argument overload instead. More...

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

void	setParent (QWidget *parent, Qt::WindowFlags f)
	This function also takes widget flags, f as an argument. More...

void	setShortcutAutoRepeat (int id, bool enable=true)
	If enable is true, auto repeat of the shortcut with the given id is enabled; otherwise it is disabled. More...

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

void	setSizeIncrement (const QSize &)

void	setSizeIncrement (int w, int h)
	Sets the x (width) size increment to w and the y (height) size increment to h. More...

void	setSizePolicy (QSizePolicy)

void	setSizePolicy (QSizePolicy::Policy horizontal, QSizePolicy::Policy vertical)
	Sets the size policy of the widget to horizontal and vertical, with standard stretch and no height-for-width. More...

void	setStatusTip (const QString &)

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

void	setToolTip (const QString &)

void	setUpdatesEnabled (bool enable)

void	setupUi (QWidget *widget)
	Sets up the user interface for the specified widget. More...

void	setWhatsThis (const QString &)

void	setWindowFilePath (const QString &filePath)

void	setWindowFlags (Qt::WindowFlags type)

void	setWindowIcon (const QIcon &icon)

void	setWindowIconText (const QString &)

void	setWindowModality (Qt::WindowModality windowModality)

void	setWindowOpacity (qreal level)

void	setWindowRole (const QString &)
	Sets the window's role to role. More...

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

void	setWindowSurface (QWindowSurface *surface)
	Sets the window surface to be the surface specified. More...

QSize	size () const

virtual QSize	sizeHint () const

QSize	sizeIncrement () const

QSizePolicy	sizePolicy () const

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

QString	statusTip () const

QStyle *	style () const

QString	styleSheet () const

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

QString	toolTip () const

QWidget *	topLevelWidget () const

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

void	ungrabGesture (Qt::GestureType type)
	Unsubscribes the widget from a given gesture type. More...

void	unsetCursor ()

void	unsetLayoutDirection ()

void	unsetLocale ()

void	update (int x, int y, int w, int h)
	This version updates a rectangle (x, y, w, h) inside the widget. More...

void	update (const QRect &)
	This version updates a rectangle rect inside the widget. More...

void	update (const QRegion &)
	This version repaints a region rgn inside the widget. More...

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

bool	updatesEnabled () const

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

QString	whatsThis () const

int	width () const

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

QString	windowFilePath () const

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

QIcon	windowIcon () const

QString	windowIconText () const

Qt::WindowModality	windowModality () const

qreal	windowOpacity () const

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

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

QWindowSurface *	windowSurface () const
	Returns the QWindowSurface this widget will be drawn into. More...

QString	windowTitle () const

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

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

int	x () const

const QX11Info &	x11Info () const
	Returns information about the configuration of the X display used to display the widget. More...

Qt::HANDLE	x11PictureHandle () const
	Returns the X11 Picture handle of the widget for XRender support. More...

int	y () const

	~QWidget ()
	Destroys the widget. More...

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

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

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

bool	disconnect (const char signal=0, const QObject receiver=0, const char *member=0)

bool	disconnect (const QObject receiver, const char member=0)

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

void	dumpObjectTree ()
	Dumps a tree of children to the debug output. More...

QList< QByteArray >	dynamicPropertyNames () const
	Returns the names of all properties that were dynamically added to the object using setProperty(). More...

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

template<typename T >
T	findChild (const QString &aName=QString()) const
	Returns the child of this object that can be cast into type T and that is called name, or 0 if there is no such object. More...

template<typename T >
QList< T >	findChildren (const QString &aName=QString()) 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. More...

template<typename T >
QList< T >	findChildren (const QRegExp &re) const

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. More...

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

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

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

virtual const QMetaObject *	metaObject () const
	Returns a pointer to the meta-object of this object. More...

void	moveToThread (QThread *thread)
	Changes the thread affinity for this object and its children. More...

QString	objectName () const

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

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

Q_INVOKABLE	QObject (QObject *parent=0)
	Constructs an object with parent object parent. More...

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

void	setObjectName (const QString &name)

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

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

void	setUserData (uint id, QObjectUserData *data)

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

int	startTimer (int interval)
	Starts a timer and returns a timer identifier, or returns zero if it could not start a timer. More...

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

QObjectUserData *	userData (uint id) const

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

Public Functions inherited from QPaintDevice
int	colorCount () const

int	depth () const

int	height () const

int	heightMM () const

int	logicalDpiX () const

int	logicalDpiY () const

QT_DEPRECATED int	numColors () const

bool	paintingActive () const

int	physicalDpiX () const

int	physicalDpiY () const

int	width () const

int	widthMM () const

virtual	~QPaintDevice ()

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

Protected Functions
void	changeEvent (QEvent *e)
	Reimplemented Function More...

bool	event (QEvent *e)
	Reimplemented Function More...

void	keyPressEvent (QKeyEvent *ev)
	Reimplemented Function More...

	QAbstractSlider (QAbstractSliderPrivate &dd, QWidget *parent=0)

SliderAction	repeatAction () const
	Returns the current repeat action. More...

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. More...

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

void	timerEvent (QTimerEvent *)
	This event handler can be reimplemented in a subclass to receive timer events for the object. More...

void	wheelEvent (QWheelEvent *e)
	Reimplemented Function More...

Protected Functions inherited from QWidget
virtual void	actionEvent (QActionEvent *)
	This event handler is called with the given event whenever the widget's actions are changed. More...

virtual void	closeEvent (QCloseEvent *)
	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. More...

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

void	create (WId=0, bool initializeWindow=true, bool destroyOldWindow=true)
	Creates a new widget window if window is 0, otherwise sets the widget's window to window. More...

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

virtual void	dragEnterEvent (QDragEnterEvent *)
	This event handler is called when a drag is in progress and the mouse enters this widget. More...

virtual void	dragLeaveEvent (QDragLeaveEvent *)
	This event handler is called when a drag is in progress and the mouse leaves this widget. More...

virtual void	dragMoveEvent (QDragMoveEvent *)
	This event handler is called if a drag is in progress, and when any of the following conditions occur: the cursor enters this widget, the cursor moves within this widget, or a modifier key is pressed on the keyboard while this widget has the focus. More...

virtual void	dropEvent (QDropEvent *)
	This event handler is called when the drag is dropped on this widget. More...

virtual void	enabledChange (bool)

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

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

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

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. More...

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

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

virtual void	fontChange (const QFont &)

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

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

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

virtual void	languageChange ()

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

virtual bool	macEvent (EventHandlerCallRef, EventRef)
	This special event handler can be reimplemented in a subclass to receive native Macintosh events. More...

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

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

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

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

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

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

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

virtual void	paletteChange (const QPalette &)

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

virtual bool	qwsEvent (QWSEvent *)
	This special event handler can be reimplemented in a subclass to receive native Qt for Embedded Linux events which are passed in the event parameter. More...

void	resetInputContext ()
	This function can be called on the widget that currently has focus to reset the input method operating on it. More...

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

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

virtual void	styleChange (QStyle &)

virtual void	tabletEvent (QTabletEvent *)
	This event handler, for event event, can be reimplemented in a subclass to receive tablet events for the widget. More...

virtual void	windowActivationChange (bool)

virtual bool	winEvent (MSG message, long result)
	This special event handler can be reimplemented in a subclass to receive native Windows events which are passed in the message parameter. More...

virtual bool	x11Event (XEvent *)
	This special event handler can be reimplemented in a subclass to receive native X11 events passed in the event parameter. More...

Protected Functions inherited from QObject
virtual void	childEvent (QChildEvent *)
	This event handler can be reimplemented in a subclass to receive child events. More...

virtual void	connectNotify (const char *signal)
	This virtual function is called when something has been connected to signal in this object. More...

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

virtual void	disconnectNotify (const char *signal)
	This virtual function is called when something has been disconnected from signal in this object. More...

	QObject (QObjectPrivate &dd, QObject *parent=0)

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

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 0. More...

int	senderSignalIndex () const

Protected Functions inherited from QPaintDevice
	QPaintDevice ()

Properties
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...

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

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

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

int	pageStep
	the page step. More...

int	singleStep
	the single step. More...

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

int	sliderPosition
	the current slider position More...

bool	tracking
	whether slider tracking is enabled More...

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

Additional Inherited Members
Static Public Functions inherited from QWidget
static QWidget *	find (WId)
	Returns a pointer to the widget with window identifer/handle id. More...

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

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

static void	setTabOrder (QWidget , QWidget )
	Puts the second widget after the first widget in the focus order. More...

Static Public Functions inherited from QObject
static bool	connect (const QObject sender, const char signal, const QObject receiver, const char member, Qt::ConnectionType=Qt::AutoConnection)
	Creates a connection of the given type from the signal in the sender object to the method in the receiver object. More...

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

static bool	disconnect (const QObject sender, const char signal, const QObject receiver, const char member)
	Disconnects signal in object sender from method in object receiver. More...

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

static uint	registerUserData ()

static QString	tr (const char sourceText, const char comment=0, int n=-1)

static QString	trUtf8 (const char sourceText, const char comment=0, int n=-1)

Static Public Functions inherited from QPaintDevice
static QWSDisplay *	qwsDisplay ()

Static Public Variables inherited from QObject
static const QMetaObject	staticMetaObject
	This variable stores the meta-object for the class. More...

Protected Slots inherited from QWidget
void	updateMicroFocus ()
	Updates the widget's micro focus. More...

Protected Variables inherited from QObject
QScopedPointer< QObjectData >	d_ptr

Protected Variables inherited from QPaintDevice
ushort	painters

Static Protected Variables inherited from QObject
static const QMetaObject	staticQtMetaObject

Related Functions inherited from QWidget
	QWidgetList

	WId
	Platform dependent window identifier. More...

Related Functions inherited from QObject
T	qFindChildqFindChildren (const QObject *obj, const QString &name)()

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

QList< T >	qFindChildrenqFindChildren (const QObject *obj, const QRegExp &regExp)()

T *	qobject_cast (QObject *object)

	QObjectList

void *	qt_find_obj_child (QObject parent, const char type, const QString &name)
	Returns a pointer to the object named name that inherits type and with a given parent. More...

Related Functions inherited from QPaintDevice
const Q_GUI_EXPORT QX11Info *	qt_x11Info (const QPaintDevice *pd)
	Returns the QX11Info structure for the pd paint device. More...

Detailed Description

The QAbstractSlider class provides an integer value within a range.

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

Here are the main properties of the class:

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

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:

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

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 55 of file qabstractslider.h.

Enumerations

◆ SliderAction

enum QAbstractSlider::SliderAction

SliderNoAction
SliderSingleStepAdd
SliderSingleStepSub
SliderPageStepAdd
SliderPageStepSub
SliderToMinimum
SliderToMaximum
SliderMove

Enumerator
SliderNoAction
SliderSingleStepAdd
SliderSingleStepSub
SliderPageStepAdd
SliderPageStepSub
SliderToMinimum
SliderToMaximum
SliderMove

Definition at line 106 of file qabstractslider.h.

                       {
         SliderNoAction,
         SliderSingleStepAdd,
         SliderSingleStepSub,
         SliderPageStepAdd,
         SliderPageStepSub,
         SliderToMinimum,
         SliderToMaximum,
         SliderMove
     };

◆ SliderChange

enum QAbstractSlider::SliderChange

protected

SliderRangeChange
SliderOrientationChange
SliderStepsChange
SliderValueChange

Enumerator
SliderRangeChange
SliderOrientationChange
SliderStepsChange
SliderValueChange

Definition at line 142 of file qabstractslider.h.

                       {
         SliderRangeChange,
         SliderOrientationChange,
         SliderStepsChange,
         SliderValueChange
     };

Constructors and Destructors

◆ QAbstractSlider() [1/2]

QAbstractSlider::QAbstractSlider ( QWidget * parent = 0 )

explicit

Constructs an abstract slider.

The parent argument is sent to the QWidget constructor.

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

Definition at line 292 of file qabstractslider.cpp.

Referenced by QDial::QDial(), QScrollBar::QScrollBar(), and QSlider::QSlider().

     :QWidget(*new QAbstractSliderPrivate, parent, 0)
 {
 }

◆ ~QAbstractSlider()

QAbstractSlider::~QAbstractSlider ( )

Destroys the slider.

Definition at line 306 of file qabstractslider.cpp.

307 {

308 }

◆ QAbstractSlider() [2/2]

QAbstractSlider::QAbstractSlider	(	QAbstractSliderPrivate &	dd,
		QWidget *	parent = `0`
	)

protected

Warning: This function is not part of the public interface.

Definition at line 298 of file qabstractslider.cpp.

     :QWidget(dd, parent, 0)
 {
 }

Functions

◆ actionTriggered

void QAbstractSlider::actionTriggered ( int action )

signal

This signal is emitted when the slider action action is triggered.

Actions are SliderSingleStepAdd , SliderSingleStepSub , SliderPageStepAdd , SliderPageStepSub , SliderToMinimum , SliderToMaximum , and SliderMove .

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

See also: triggerAction()

Referenced by triggerAction().

◆ changeEvent()

void QAbstractSlider::changeEvent ( QEvent * e )

protectedvirtual

Reimplemented Function

Reimplemented from QWidget.

Definition at line 970 of file qabstractslider.cpp.

 {
     Q_D(QAbstractSlider);
     switch (ev->type()) {
     case QEvent::EnabledChange:
         if (!isEnabled()) {
             d->repeatActionTimer.stop();
             setSliderDown(false);
         }
         // fall through...
     default:
         QWidget::changeEvent(ev);
     }
 }

◆ event()

bool QAbstractSlider::event ( QEvent * e )

protectedvirtual

Reimplemented Function

Reimplemented from QWidget.

Reimplemented in QSlider, QDial, and QScrollBar.

Definition at line 988 of file qabstractslider.cpp.

Referenced by QScrollBar::event(), QDial::event(), and QSlider::event().

 {
 #ifdef QT_KEYPAD_NAVIGATION
     Q_D(QAbstractSlider);
     switch (e->type()) {
     case QEvent::FocusIn:
         d->origValue = d->value;
         break;
     default:
         break;
     }
 #endif
 
     return QWidget::event(e);
 }

◆ hasTracking()

bool QAbstractSlider::hasTracking ( ) const

Definition at line 474 of file qabstractslider.cpp.

Referenced by QAbstractScrollAreaPrivate::replaceScrollBar().

 {
     Q_D(const QAbstractSlider);
     return d->tracking;
 }

◆ invertedAppearance()

bool QAbstractSlider::invertedAppearance ( ) const

Referenced by QAccessibleDial::rect(), QAbstractScrollAreaPrivate::replaceScrollBar(), and setValue().

◆ invertedControls()

bool QAbstractSlider::invertedControls ( ) const

Referenced by QScrollBarPrivate::init(), QAbstractScrollAreaPrivate::replaceScrollBar(), QAbstractSliderPrivate::scrollByDelta(), and setInvertedAppearance().

◆ isSliderDown()

bool QAbstractSlider::isSliderDown ( ) const

Definition at line 513 of file qabstractslider.cpp.

Referenced by QAbstractScrollAreaPrivate::replaceScrollBar().

 {
     Q_D(const QAbstractSlider);
     return d->pressed;
 }

◆ keyPressEvent()

void QAbstractSlider::keyPressEvent ( QKeyEvent * ev )

protectedvirtual

Reimplemented Function

Reimplemented from QWidget.

Definition at line 824 of file qabstractslider.cpp.

 {
     Q_D(QAbstractSlider);
     SliderAction action = SliderNoAction;
 #ifdef QT_KEYPAD_NAVIGATION
     if (ev->isAutoRepeat()) {
         if (!d->firstRepeat.isValid())
             d->firstRepeat.start();
         else if (1 == d->repeatMultiplier) {
             // This is the interval in milli seconds which one key repetition
             // takes.
             const int repeatMSecs = d->firstRepeat.elapsed();
 
             const qreal currentTimeElapse = (qreal(maximum()) / singleStep()) * repeatMSecs;
 
             const int SliderRepeatElapse = 2500;
 
             d->repeatMultiplier = currentTimeElapse / SliderRepeatElapse;
         }
 
     }
     else if (d->firstRepeat.isValid()) {
         d->firstRepeat.invalidate();
         d->repeatMultiplier = 1;
     }
 
 #endif
 
     switch (ev->key()) {
 #ifdef QT_KEYPAD_NAVIGATION
         case Qt::Key_Select:
             if (QApplication::keypadNavigationEnabled())
                 setEditFocus(!hasEditFocus());
             else
                 ev->ignore();
             break;
         case Qt::Key_Back:
             if (QApplication::keypadNavigationEnabled() && hasEditFocus()) {
                 setValue(d->origValue);
                 setEditFocus(false);
             } else
                 ev->ignore();
             break;
 #endif
 
         // It seems we need to use invertedAppearance for Left and right, otherwise, things look weird.
         case Qt::Key_Left:
 #ifdef QT_KEYPAD_NAVIGATION
             // In QApplication::KeypadNavigationDirectional, we want to change the slider
             // value if there is no left/right navigation possible and if this slider is not
             // inside a tab widget.
             if (QApplication::keypadNavigationEnabled()
                     && (!hasEditFocus() && QApplication::navigationMode() == Qt::NavigationModeKeypadTabOrder
                     || d->orientation == Qt::Vertical
                     || !hasEditFocus()
                     && (QWidgetPrivate::canKeypadNavigate(Qt::Horizontal) || QWidgetPrivate::inTabWidget(this)))) {
                 ev->ignore();
                 return;
             }
             if (QApplication::keypadNavigationEnabled() && d->orientation == Qt::Vertical)
                 action = d->invertedControls ? SliderSingleStepSub : SliderSingleStepAdd;
             else
 #endif
             if (isRightToLeft())
                 action = d->invertedAppearance ? SliderSingleStepSub : SliderSingleStepAdd;
             else
                 action = !d->invertedAppearance ? SliderSingleStepSub : SliderSingleStepAdd;
             break;
         case Qt::Key_Right:
 #ifdef QT_KEYPAD_NAVIGATION
             // Same logic as in Qt::Key_Left
             if (QApplication::keypadNavigationEnabled()
                     && (!hasEditFocus() && QApplication::navigationMode() == Qt::NavigationModeKeypadTabOrder
                     || d->orientation == Qt::Vertical
                     || !hasEditFocus()
                     && (QWidgetPrivate::canKeypadNavigate(Qt::Horizontal) || QWidgetPrivate::inTabWidget(this)))) {
                 ev->ignore();
                 return;
             }
             if (QApplication::keypadNavigationEnabled() && d->orientation == Qt::Vertical)
                 action = d->invertedControls ? SliderSingleStepAdd : SliderSingleStepSub;
             else
 #endif
             if (isRightToLeft())
                 action = d->invertedAppearance ? SliderSingleStepAdd : SliderSingleStepSub;
             else
                 action = !d->invertedAppearance ? SliderSingleStepAdd : SliderSingleStepSub;
             break;
         case Qt::Key_Up:
 #ifdef QT_KEYPAD_NAVIGATION
             // In QApplication::KeypadNavigationDirectional, we want to change the slider
             // value if there is no up/down navigation possible.
             if (QApplication::keypadNavigationEnabled()
                     && (QApplication::navigationMode() == Qt::NavigationModeKeypadTabOrder
                     || d->orientation == Qt::Horizontal
                     || !hasEditFocus() && QWidgetPrivate::canKeypadNavigate(Qt::Vertical))) {
                 ev->ignore();
                 break;
             }
 #endif
             action = d->invertedControls ? SliderSingleStepSub : SliderSingleStepAdd;
             break;
         case Qt::Key_Down:
 #ifdef QT_KEYPAD_NAVIGATION
             // Same logic as in Qt::Key_Up
             if (QApplication::keypadNavigationEnabled()
                     && (QApplication::navigationMode() == Qt::NavigationModeKeypadTabOrder
                     || d->orientation == Qt::Horizontal
                     || !hasEditFocus() && QWidgetPrivate::canKeypadNavigate(Qt::Vertical))) {
                 ev->ignore();
                 break;
             }
 #endif
             action = d->invertedControls ? SliderSingleStepAdd : SliderSingleStepSub;
             break;
         case Qt::Key_PageUp:
             action = d->invertedControls ? SliderPageStepSub : SliderPageStepAdd;
             break;
         case Qt::Key_PageDown:
             action = d->invertedControls ? SliderPageStepAdd : SliderPageStepSub;
             break;
         case Qt::Key_Home:
             action = SliderToMinimum;
             break;
         case Qt::Key_End:
             action = SliderToMaximum;
             break;
         default:
             ev->ignore();
             break;
     }
     if (action)
         triggerAction(action);
 }

◆ maximum()

int QAbstractSlider::maximum ( ) const

Referenced by QTextEditPrivate::_q_ensureVisible(), QGraphicsView::centerOn(), QTableView::doItemsLayout(), QTextEditPrivate::horizontalOffset(), keyPressEvent(), QPlainTextEdit::paintEvent(), QScrollBarPrivate::pixelPosToRangeValue(), QScrollBar::QScrollBar(), QAccessibleDial::rect(), QAbstractScrollAreaPrivate::replaceScrollBar(), setMaximum(), QTextBrowserPrivate::setSource(), QComboBox::showPopup(), QAccessibleScrollBar::state(), QAccessibleSlider::state(), QGraphicsViewPrivate::updateScroll(), and QComboBoxPrivateContainer::updateScrollers().

◆ minimum()

int QAbstractSlider::minimum ( ) const

Referenced by QGraphicsView::centerOn(), QTreeView::moveCursor(), QPlainTextEdit::paintEvent(), QScrollBarPrivate::pixelPosToRangeValue(), QScrollBar::QScrollBar(), QAccessibleDial::rect(), QAbstractScrollAreaPrivate::replaceScrollBar(), setMinimum(), QComboBox::showPopup(), QAccessibleScrollBar::state(), QAccessibleSlider::state(), QGraphicsViewPrivate::updateScroll(), and QComboBoxPrivateContainer::updateScrollers().

◆ orientation()

Qt::Orientation QAbstractSlider::orientation ( ) const

Referenced by QScrollBarPrivate::init(), QScrollBarPrivate::pixelPosToRangeValue(), QScrollBar::QScrollBar(), QSlider::QSlider(), qt_aqua_get_known_size(), QAccessibleSlider::rect(), QAbstractScrollAreaPrivate::replaceScrollBar(), setOrientation(), and QAccessibleSlider::text().

◆ pageStep()

int QAbstractSlider::pageStep ( ) const

Referenced by QAbstractItemView::doAutoScroll(), QDial::QDial(), QScrollBar::QScrollBar(), QSlider::QSlider(), QAbstractScrollAreaPrivate::replaceScrollBar(), QAbstractSliderPrivate::scrollByDelta(), QTreeView::scrollTo(), and setPageStep().

◆ 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()em>Reimplemented Function

Definition at line 702 of file qabstractslider.cpp.

◆ setInvertedAppearance()

void QAbstractSlider::setInvertedAppearance ( bool invert )

Definition at line 612 of file qabstractslider.cpp.

Referenced by QAbstractScrollAreaPrivate::replaceScrollBar().

 {
     Q_D(QAbstractSlider);
     d->invertedAppearance = invert;
     update();
 }

◆ setInvertedControls()

void QAbstractSlider::setInvertedControls ( bool invert )

Definition at line 639 of file qabstractslider.cpp.

Referenced by QAbstractScrollAreaPrivate::replaceScrollBar().

 {
     Q_D(QAbstractSlider);
     d->invertedControls = invert;
 }

◆ setMaximum()

void QAbstractSlider::setMaximum ( int max )

Definition at line 383 of file qabstractslider.cpp.

Referenced by QColumnView::resizeEvent().

 {
     Q_D(QAbstractSlider);
     setRange(qMin(d->minimum, max), max);
 }

◆ setMinimum()

void QAbstractSlider::setMinimum ( int min )

Definition at line 356 of file qabstractslider.cpp.

 {
     Q_D(QAbstractSlider);
     setRange(min, qMax(d->maximum, min));
 }

◆ setOrientation

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

slot

Definition at line 319 of file qabstractslider.cpp.

Referenced by QAbstractScrollAreaPrivate::replaceScrollBar().

 {
     Q_D(QAbstractSlider);
     if (d->orientation == orientation)
         return;
 
     d->orientation = orientation;
     if (!testAttribute(Qt::WA_WState_OwnSizePolicy)) {
         QSizePolicy sp = sizePolicy();
         sp.transpose();
         setSizePolicy(sp);
         setAttribute(Qt::WA_WState_OwnSizePolicy, false);
     }
     update();
     updateGeometry();
 }

◆ setPageStep()

void QAbstractSlider::setPageStep ( int step )

Definition at line 441 of file qabstractslider.cpp.

Referenced by QTextEditPrivate::_q_adjustScrollbars(), QPlainTextEditPrivate::_q_adjustScrollbars(), QGraphicsViewPrivate::recalculateContentSize(), QAbstractScrollAreaPrivate::replaceScrollBar(), QColumnViewPreviewColumn::resizeEvent(), QTableView::updateGeometries(), and QMdiAreaPrivate::updateScrollBars().

 {
     Q_D(QAbstractSlider);
     if (step != d->pageStep)
         d->setSteps(d->singleStep, step);
 }

◆ setRange()

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

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 261 of file qabstractslider.cpp.

Referenced by QTextEditPrivate::_q_adjustScrollbars(), QPlainTextEditPrivate::_q_adjustScrollbars(), QAbstractItemViewPrivate::init(), QGraphicsViewPrivate::recalculateContentSize(), QAbstractScrollAreaPrivate::replaceScrollBar(), QColumnViewPreviewColumn::resizeEvent(), setMaximum(), setMinimum(), QTableView::updateGeometries(), QListView::updateGeometries(), and QMdiAreaPrivate::updateScrollBars().

 {
     Q_D(QAbstractSlider);
     int oldMin = d->minimum;
     int oldMax = d->maximum;
     d->minimum = min;
     d->maximum = qMax(min, max);
     if (oldMin != d->minimum || oldMax != d->maximum) {
         sliderChange(SliderRangeChange);
         emit rangeChanged(d->minimum, d->maximum);
         setValue(d->value); // re-bound
     }
 }

◆ 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 687 of file qabstractslider.cpp.

Referenced by QScrollBar::hideEvent(), QScrollBar::mouseMoveEvent(), QSlider::mousePressEvent(), and QSlider::mouseReleaseEvent().

 {
     Q_D(QAbstractSlider);
     if ((d->repeatAction = action) == SliderNoAction) {
         d->repeatActionTimer.stop();
     } else {
         d->repeatActionTime = repeatTime;
         d->repeatActionTimer.start(thresholdTime, this);
     }
 }

◆ setSingleStep()

void QAbstractSlider::setSingleStep ( int step )

Definition at line 414 of file qabstractslider.cpp.

Referenced by QTextEditPrivate::init(), QPlainTextEditPrivate::init(), QGraphicsViewPrivate::recalculateContentSize(), QAbstractScrollAreaPrivate::replaceScrollBar(), QTableView::updateGeometries(), and QMdiAreaPrivate::updateScrollBars().

 {
     Q_D(QAbstractSlider);
     if (step != d->singleStep)
         d->setSteps(step, d->pageStep);
 }

◆ setSliderDown()

void QAbstractSlider::setSliderDown ( bool down )

Definition at line 495 of file qabstractslider.cpp.

Referenced by changeEvent(), QScrollBar::mousePressEvent(), QDial::mousePressEvent(), QSlider::mousePressEvent(), QDial::mouseReleaseEvent(), QSlider::mouseReleaseEvent(), and QAbstractScrollAreaPrivate::replaceScrollBar().

 {
     Q_D(QAbstractSlider);
     bool doEmit = d->pressed != down;
 
     d->pressed = down;
 
     if (doEmit) {
         if (down)
             emit sliderPressed();
         else
             emit sliderReleased();
     }
 
     if (!down && d->position != d->value)
         triggerAction(SliderMove);
 }

◆ setSliderPosition()

void QAbstractSlider::setSliderPosition ( int position )

Definition at line 529 of file qabstractslider.cpp.

Referenced by QScrollBar::mouseMoveEvent(), QDial::mouseMoveEvent(), QSlider::mouseMoveEvent(), QScrollBar::mousePressEvent(), QDial::mousePressEvent(), QSlider::mousePressEvent(), QAbstractScrollAreaPrivate::replaceScrollBar(), and triggerAction().

 {
     Q_D(QAbstractSlider);
     position = d->bound(position);
     if (position == d->position)
         return;
     d->position = position;
     if (!d->tracking)
         update();
     if (d->pressed)
         emit sliderMoved(position);
     if (d->tracking && !d->blocktracking)
         triggerAction(SliderMove);
 }

◆ setTracking()

void QAbstractSlider::setTracking ( bool enable )

Definition at line 468 of file qabstractslider.cpp.

Referenced by QAbstractScrollAreaPrivate::replaceScrollBar().

 {
     Q_D(QAbstractSlider);
     d->tracking = enable;
 }

◆ setValue

void QAbstractSlider::setValue ( int value )

slot

Definition at line 570 of file qabstractslider.cpp.

Referenced by QPlainTextEditPrivate::_q_adjustScrollbars(), QTextEditPrivate::_q_ensureVisible(), QGraphicsView::centerOn(), QScrollBar::contextMenuEvent(), QAbstractItemView::doAutoScroll(), QGraphicsView::ensureVisible(), QAbstractScrollArea::event(), QPlainTextEdit::event(), keyPressEvent(), QGraphicsView::mouseMoveEvent(), QDial::mouseReleaseEvent(), QTreeView::moveCursor(), QAbstractScrollAreaPrivate::replaceScrollBar(), QMdiAreaPrivate::resizeToMinimumTileSize(), QTextBrowserPrivate::restoreHistoryEntry(), QColumnView::scrollTo(), QTableView::scrollTo(), QListView::scrollTo(), QTreeView::scrollTo(), QAbstractItemView::scrollToBottom(), QAbstractItemView::scrollToTop(), QPrintPreviewWidgetPrivate::setCurrentPage(), QAccessibleAbstractSlider::setCurrentValue(), QTextBrowserPrivate::setSource(), triggerAction(), and QMdiAreaPrivate::updateScrollBars().

 {
     Q_D(QAbstractSlider);
     value = d->bound(value);
     if (d->value == value && d->position == value)
         return;
     d->value = value;
     if (d->position != value) {
         d->position = value;
         if (d->pressed)
             emit sliderMoved((d->position = value));
     }
 #ifndef QT_NO_ACCESSIBILITY
     QAccessible::updateAccessibility(this, 0, QAccessible::ValueChanged);
 #endif
     sliderChange(SliderValueChange);
     emit valueChanged(value);
 }

◆ singleStep()

int QAbstractSlider::singleStep ( ) const

Referenced by keyPressEvent(), QTreeView::moveCursor(), QAbstractScrollAreaPrivate::replaceScrollBar(), and setSingleStep().

◆ sliderChange()

void QAbstractSlider::sliderChange ( SliderChange change )

protectedvirtual

Reimplement this virtual function to track slider changes such as SliderRangeChange , SliderOrientationChange , SliderStepsChange , or SliderValueChange .

The default implementation only updates the display and ignores the change parameter.

Reimplemented in QDial, and QScrollBar.

Definition at line 733 of file qabstractslider.cpp.

Referenced by setValue(), QScrollBar::sliderChange(), and QDial::sliderChange().

 {
     update();
 }

◆ 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()

Referenced by setSliderPosition(), and setValue().

◆ sliderPosition()

int QAbstractSlider::sliderPosition ( ) const

Referenced by QAbstractScrollAreaPrivate::replaceScrollBar(), and setSliderPosition().

◆ 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()

Referenced by setSliderDown().

◆ 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

Referenced by setSliderDown().

◆ timerEvent()

void QAbstractSlider::timerEvent ( QTimerEvent * event )

protectedvirtual

This event handler can be reimplemented in a subclass to receive timer events for the object.

QTimer provides a higher-level interface to the timer functionality, and also more general information about timers. The timer event is passed in the event parameter.

See also: startTimer(), killTimer(), event()

Reimplemented from QObject.

Definition at line 710 of file qabstractslider.cpp.

 {
     Q_D(QAbstractSlider);
     if (e->timerId() == d->repeatActionTimer.timerId()) {
         if (d->repeatActionTime) { // was threshold time, use repeat time next time
             d->repeatActionTimer.start(d->repeatActionTime, this);
             d->repeatActionTime = 0;
         }
         if (d->repeatAction == SliderPageStepAdd)
             d->setAdjustedSliderPosition(d->overflowSafeAdd(d->pageStep));
         else if (d->repeatAction == SliderPageStepSub)
             d->setAdjustedSliderPosition(d->overflowSafeAdd(-d->pageStep));
         else
             triggerAction(d->repeatAction);
     }
 }

◆ triggerAction()

void QAbstractSlider::triggerAction ( SliderAction action )

Triggers a slider action.

Possible actions are SliderSingleStepAdd , SliderSingleStepSub , SliderPageStepAdd , SliderPageStepSub , SliderToMinimum , SliderToMaximum , and SliderMove .

See also: actionTriggered()

Definition at line 650 of file qabstractslider.cpp.

Referenced by QScrollBar::contextMenuEvent(), keyPressEvent(), QSlider::mousePressEvent(), QTextEditPrivate::pageUpDown(), QComboBoxPrivateContainer::scrollItemView(), setSliderDown(), setSliderPosition(), and timerEvent().

 {
     Q_D(QAbstractSlider);
     d->blocktracking = true;
     switch (action) {
     case SliderSingleStepAdd:
         setSliderPosition(d->overflowSafeAdd(d->effectiveSingleStep()));
         break;
     case SliderSingleStepSub:
         setSliderPosition(d->overflowSafeAdd(-d->effectiveSingleStep()));
         break;
     case SliderPageStepAdd:
         setSliderPosition(d->overflowSafeAdd(d->pageStep));
         break;
     case SliderPageStepSub:
         setSliderPosition(d->overflowSafeAdd(-d->pageStep));
         break;
     case SliderToMinimum:
         setSliderPosition(d->minimum);
         break;
     case SliderToMaximum:
         setSliderPosition(d->maximum);
         break;
     case SliderMove:
     case SliderNoAction:
         break;
     };
     emit actionTriggered(action);
     d->blocktracking = false;
     setValue(d->position);
 }

◆ value()

int QAbstractSlider::value ( ) const

Referenced by QPlainTextEditPrivate::_q_adjustScrollbars(), QTextBrowserPrivate::createHistoryEntry(), QAbstractItemView::doAutoScroll(), QAbstractScrollArea::event(), QPlainTextEdit::event(), QTextEditPrivate::horizontalOffset(), QGraphicsView::mouseMoveEvent(), QSlider::mousePressEvent(), QTreeView::moveCursor(), QDial::QDial(), QScrollBar::QScrollBar(), QSlider::QSlider(), QAccessibleTextEdit::rect(), QAccessibleDial::rect(), QAbstractScrollAreaPrivate::replaceScrollBar(), QTextBrowserPrivate::restoreHistoryEntry(), QAbstractSliderPrivate::scrollByDelta(), QTreeView::scrollContentsBy(), QTreeView::scrollTo(), QAccessibleTextEdit::scrollToSubstring(), QMdiSubWindowPrivate::setMaximizeMode(), setSliderPosition(), QTextBrowserPrivate::setSource(), setValue(), QAccessibleScrollBar::state(), QAccessibleSlider::state(), QGraphicsViewPrivate::updateScroll(), QMdiAreaPrivate::updateScrollBars(), QComboBoxPrivateContainer::updateScrollers(), QTextEditPrivate::verticalOffset(), and QTreeView::verticalOffset().

◆ valueChanged

void QAbstractSlider::valueChanged ( int value )

signal

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

Referenced by setValue().

◆ wheelEvent()

void QAbstractSlider::wheelEvent ( QWheelEvent * e )

protectedvirtual

Reimplemented Function

Reimplemented from QWidget.

Definition at line 810 of file qabstractslider.cpp.

 {
     Q_D(QAbstractSlider);
     e->ignore();
     int delta = e->delta();
     if (d->scrollByDelta(e->orientation(), e->modifiers(), delta))
         e->accept();
 }

Properties

◆ invertedAppearance

bool QAbstractSlider::invertedAppearance

private

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 67 of file qabstractslider.h.

◆ invertedControls

bool QAbstractSlider::invertedControls

private

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 68 of file qabstractslider.h.

◆ maximum

int QAbstractSlider::maximum

private

the slider's maximum value

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

Definition at line 60 of file qabstractslider.h.

Referenced by QAccessibleAbstractSlider::maximumValue().

◆ minimum

int QAbstractSlider::minimum

private

the sliders's minimum value

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

Definition at line 59 of file qabstractslider.h.

Referenced by QAccessibleAbstractSlider::minimumValue().

◆ orientation

Qt::Orientation QAbstractSlider::orientation

private

the orientation of the slider

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

Definition at line 66 of file qabstractslider.h.

Referenced by QScrollBar::QScrollBar(), and QSlider::QSlider().

◆ pageStep

int QAbstractSlider::pageStep

private

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 62 of file qabstractslider.h.

◆ singleStep

int QAbstractSlider::singleStep

private

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 61 of file qabstractslider.h.

◆ sliderDown

QAbstractSlider::sliderDown

private

whether the slider is pressed down.

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

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

Definition at line 69 of file qabstractslider.h.

◆ sliderPosition

int QAbstractSlider::sliderPosition

private

the current slider position

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

Definition at line 64 of file qabstractslider.h.

◆ tracking

QAbstractSlider::tracking

private

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 65 of file qabstractslider.h.

◆ value

int QAbstractSlider::value

private

the slider's current value

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

Changing the value also changes the sliderPosition .

Definition at line 63 of file qabstractslider.h.

Referenced by QAccessibleAbstractSlider::currentValue().

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

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

Public Types

Public Slots

Signals

Public Functions

Protected Types

Protected Functions

Properties

Additional Inherited Members

Detailed Description

Enumerations

◆ SliderAction

◆ SliderChange

Constructors and Destructors

◆ QAbstractSlider() [1/2]

◆ ~QAbstractSlider()

◆ QAbstractSlider() [2/2]

Functions

◆ 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

◆ wheelEvent()

Properties

◆ invertedAppearance

◆ invertedControls

◆ maximum

◆ minimum

◆ orientation

◆ pageStep

◆ singleStep

◆ sliderDown

◆ sliderPosition

◆ tracking

◆ value