The QComboBox widget is a combined button and popup list. More...

#include <qcombobox.h>

Inheritance diagram for QComboBox:

Collaboration diagram for QComboBox:

Public Types
enum	InsertPolicy { NoInsert , InsertAtTop , InsertAtCurrent , InsertAtBottom , InsertAfterCurrent , InsertBeforeCurrent , InsertAlphabetically }

enum	SizeAdjustPolicy { AdjustToContents , AdjustToContentsOnFirstShow , AdjustToMinimumContentsLengthWithIcon }

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

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

Public Slots
void	clear ()

void	clearEditText ()

void	setEditText (const QString &text)

void	setCurrentIndex (int index)

void	setCurrentText (const QString &text)

Public Slots inherited from QWidget
void	setEnabled (bool)

void	setDisabled (bool)

void	setWindowModified (bool)

void	setWindowTitle (const QString &)

void	setStyleSheet (const QString &styleSheet)

void	setFocus ()

void	update ()

void	repaint ()

virtual void	setVisible (bool visible)

void	setHidden (bool hidden)

void	show ()

void	hide ()

void	showMinimized ()

void	showMaximized ()

void	showFullScreen ()

void	showNormal ()

bool	close ()

void	raise ()

void	lower ()

Public Slots inherited from QObject
void	deleteLater ()

Signals
void	editTextChanged (const QString &)

void	activated (int index)

void	textActivated (const QString &)

void	highlighted (int index)

void	textHighlighted (const QString &)

void	currentIndexChanged (int index)

void	currentTextChanged (const QString &)

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

void	windowIconChanged (const QIcon &icon)

void	windowIconTextChanged (const QString &iconText)

void	customContextMenuRequested (const QPoint &pos)

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

void	objectNameChanged (const QString &objectName, QPrivateSignal)

Public Member Functions
	QComboBox (QWidget *parent=nullptr)

	~QComboBox ()

int	maxVisibleItems () const

void	setMaxVisibleItems (int maxItems)

int	count () const

void	setMaxCount (int max)

int	maxCount () const

bool	duplicatesEnabled () const

void	setDuplicatesEnabled (bool enable)

void	setFrame (bool)

bool	hasFrame () const

int	findText (const QString &text, Qt::MatchFlags flags=static_cast< Qt::MatchFlags >(Qt::MatchExactly\|Qt::MatchCaseSensitive)) const

int	findData (const QVariant &data, int role=Qt::UserRole, Qt::MatchFlags flags=static_cast< Qt::MatchFlags >(Qt::MatchExactly\|Qt::MatchCaseSensitive)) const

InsertPolicy	insertPolicy () const

void	setInsertPolicy (InsertPolicy policy)

SizeAdjustPolicy	sizeAdjustPolicy () const

void	setSizeAdjustPolicy (SizeAdjustPolicy policy)

int	minimumContentsLength () const

void	setMinimumContentsLength (int characters)

QSize	iconSize () const

void	setIconSize (const QSize &size)

void	setPlaceholderText (const QString &placeholderText)

QString	placeholderText () const

bool	isEditable () const

void	setEditable (bool editable)

void	setLineEdit (QLineEdit *edit)

QLineEdit *	lineEdit () const

void	setValidator (const QValidator *v)

const QValidator *	validator () const

QAbstractItemDelegate *	itemDelegate () const

void	setItemDelegate (QAbstractItemDelegate *delegate)

QAbstractItemModel *	model () const

virtual void	setModel (QAbstractItemModel *model)

QModelIndex	rootModelIndex () const

void	setRootModelIndex (const QModelIndex &index)

int	modelColumn () const

void	setModelColumn (int visibleColumn)

int	currentIndex () const

QString	currentText () const

QVariant	currentData (int role=Qt::UserRole) const

QString	itemText (int index) const

QIcon	itemIcon (int index) const

QVariant	itemData (int index, int role=Qt::UserRole) const

void	addItem (const QString &text, const QVariant &userData=QVariant())

void	addItem (const QIcon &icon, const QString &text, const QVariant &userData=QVariant())

void	addItems (const QStringList &texts)

void	insertItem (int index, const QString &text, const QVariant &userData=QVariant())

void	insertItem (int index, const QIcon &icon, const QString &text, const QVariant &userData=QVariant())

void	insertItems (int index, const QStringList &texts)

void	insertSeparator (int index)

void	removeItem (int index)

void	setItemText (int index, const QString &text)

void	setItemIcon (int index, const QIcon &icon)

void	setItemData (int index, const QVariant &value, int role=Qt::UserRole)

QAbstractItemView *	view () const

void	setView (QAbstractItemView *itemView)

QSize	sizeHint () const override

QSize	minimumSizeHint () const override

virtual void	showPopup ()

virtual void	hidePopup ()

bool	event (QEvent *event) override

QVariant	inputMethodQuery (Qt::InputMethodQuery) const override

Q_INVOKABLE QVariant	inputMethodQuery (Qt::InputMethodQuery query, const QVariant &argument) const

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

	~QWidget ()

int	devType () const override

WId	winId () const

void	createWinId ()

WId	internalWinId () const

WId	effectiveWinId () const

QStyle *	style () const

void	setStyle (QStyle *)

bool	isWindow () const

bool	isModal () const

Qt::WindowModality	windowModality () const

void	setWindowModality (Qt::WindowModality windowModality)

bool	isEnabled () const

bool	isEnabledTo (const QWidget *) const

QRect	frameGeometry () const

const QRect &	geometry () const

QRect	normalGeometry () const

int	x () const

int	y () const

QPoint	pos () const

QSize	frameSize () const

QSize	size () const

int	width () const

int	height () const

QRect	rect () const

QRect	childrenRect () const

QRegion	childrenRegion () const

QSize	minimumSize () const

QSize	maximumSize () const

int	minimumWidth () const

int	minimumHeight () const

int	maximumWidth () const

int	maximumHeight () const

void	setMinimumSize (const QSize &)

void	setMinimumSize (int minw, int minh)

void	setMaximumSize (const QSize &)

void	setMaximumSize (int maxw, int maxh)

void	setMinimumWidth (int minw)

void	setMinimumHeight (int minh)

void	setMaximumWidth (int maxw)

void	setMaximumHeight (int maxh)

QSize	sizeIncrement () const

void	setSizeIncrement (const QSize &)

void	setSizeIncrement (int w, int h)

QSize	baseSize () const

void	setBaseSize (const QSize &)

void	setBaseSize (int basew, int baseh)

void	setFixedSize (const QSize &)

void	setFixedSize (int w, int h)

void	setFixedWidth (int w)

void	setFixedHeight (int h)

QPointF	mapToGlobal (const QPointF &) const

QPoint	mapToGlobal (const QPoint &) const

QPointF	mapFromGlobal (const QPointF &) const

QPoint	mapFromGlobal (const QPoint &) const

QPointF	mapToParent (const QPointF &) const

QPoint	mapToParent (const QPoint &) const

QPointF	mapFromParent (const QPointF &) const

QPoint	mapFromParent (const QPoint &) const

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

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

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

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

QWidget *	window () const

QWidget *	nativeParentWidget () const

QWidget *	topLevelWidget () const

const QPalette &	palette () const

void	setPalette (const QPalette &)

void	setBackgroundRole (QPalette::ColorRole)

QPalette::ColorRole	backgroundRole () const

void	setForegroundRole (QPalette::ColorRole)

QPalette::ColorRole	foregroundRole () const

const QFont &	font () const

void	setFont (const QFont &)

QFontMetrics	fontMetrics () const

QFontInfo	fontInfo () const

QCursor	cursor () const

void	setCursor (const QCursor &)

void	unsetCursor ()

void	setMouseTracking (bool enable)

bool	hasMouseTracking () const

bool	underMouse () const

void	setTabletTracking (bool enable)

bool	hasTabletTracking () const

void	setMask (const QBitmap &)

void	setMask (const QRegion &)

QRegion	mask () const

void	clearMask ()

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

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

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

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

void	ungrabGesture (Qt::GestureType type)

QString	styleSheet () const

QString	windowTitle () const

void	setWindowIcon (const QIcon &icon)

QIcon	windowIcon () const

void	setWindowIconText (const QString &)

QString	windowIconText () const

void	setWindowRole (const QString &)

QString	windowRole () const

void	setWindowFilePath (const QString &filePath)

QString	windowFilePath () const

void	setWindowOpacity (qreal level)

qreal	windowOpacity () const

bool	isWindowModified () const

QString	accessibleName () const

void	setAccessibleName (const QString &name)

QString	accessibleDescription () const

void	setAccessibleDescription (const QString &description)

void	setLayoutDirection (Qt::LayoutDirection direction)

Qt::LayoutDirection	layoutDirection () const

void	unsetLayoutDirection ()

void	setLocale (const QLocale &locale)

QLocale	locale () const

void	unsetLocale ()

bool	isRightToLeft () const

bool	isLeftToRight () const

bool	isActiveWindow () const

void	activateWindow ()

void	clearFocus ()

void	setFocus (Qt::FocusReason reason)

Qt::FocusPolicy	focusPolicy () const

void	setFocusPolicy (Qt::FocusPolicy policy)

bool	hasFocus () const

void	setFocusProxy (QWidget *)

QWidget *	focusProxy () const

Qt::ContextMenuPolicy	contextMenuPolicy () const

void	setContextMenuPolicy (Qt::ContextMenuPolicy policy)

void	grabMouse ()

void	grabMouse (const QCursor &)

void	releaseMouse ()

void	grabKeyboard ()

void	releaseKeyboard ()

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

void	releaseShortcut (int id)

void	setShortcutEnabled (int id, bool enable=true)

void	setShortcutAutoRepeat (int id, bool enable=true)

bool	updatesEnabled () const

void	setUpdatesEnabled (bool enable)

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

void	update (const QRect &)

void	update (const QRegion &)

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

void	repaint (const QRect &)

void	repaint (const QRegion &)

void	stackUnder (QWidget *)

void	move (int x, int y)

void	move (const QPoint &)

void	resize (int w, int h)

void	resize (const QSize &)

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

void	setGeometry (const QRect &)

QByteArray	saveGeometry () const

bool	restoreGeometry (const QByteArray &geometry)

void	adjustSize ()

bool	isVisible () const

bool	isVisibleTo (const QWidget *) const

bool	isHidden () const

bool	isMinimized () const

bool	isMaximized () const

bool	isFullScreen () const

Qt::WindowStates	windowState () const

void	setWindowState (Qt::WindowStates state)

void	overrideWindowState (Qt::WindowStates state)

QSizePolicy	sizePolicy () const

void	setSizePolicy (QSizePolicy)

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

virtual int	heightForWidth (int) const

virtual bool	hasHeightForWidth () const

QRegion	visibleRegion () const

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

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

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

QRect	contentsRect () const

QLayout *	layout () const

void	setLayout (QLayout *)

void	updateGeometry ()

void	setParent (QWidget *parent)

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

void	scroll (int dx, int dy)

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

QWidget *	focusWidget () const

QWidget *	nextInFocusChain () const

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

bool	acceptDrops () const

void	setAcceptDrops (bool on)

void	addAction (QAction *action)

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

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

void	insertAction (QAction before, QAction action)

void	removeAction (QAction *action)

QList< QAction * >	actions () const

QAction *	addAction (const QString &text)

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

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

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

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

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

QWidget *	parentWidget () const

void	setWindowFlags (Qt::WindowFlags type)

Qt::WindowFlags	windowFlags () const

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

void	overrideWindowFlags (Qt::WindowFlags type)

Qt::WindowType	windowType () const

QWidget *	childAt (int x, int y) const

QWidget *	childAt (const QPoint &p) const

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

bool	testAttribute (Qt::WidgetAttribute) const

QPaintEngine *	paintEngine () const override

void	ensurePolished () const

bool	isAncestorOf (const QWidget *child) const

bool	autoFillBackground () const

void	setAutoFillBackground (bool enabled)

QBackingStore *	backingStore () const

QWindow *	windowHandle () const

QScreen *	screen () const

void	setScreen (QScreen *)

Qt::InputMethodHints	inputMethodHints () const

void	setInputMethodHints (Qt::InputMethodHints hints)

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

virtual	~QObject ()

virtual bool	eventFilter (QObject watched, QEvent event)

QString	objectName () const

void	setObjectName (const QString &name)

QBindable< QString >	bindableObjectName ()

bool	isWidgetType () const

bool	isWindowType () const

bool	signalsBlocked () const noexcept

bool	blockSignals (bool b) noexcept

QThread *	thread () const

void	moveToThread (QThread *thread)

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

void	killTimer (int id)

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

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

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

const QObjectList &	children () const

void	setParent (QObject *parent)

void	installEventFilter (QObject *filterObj)

void	removeEventFilter (QObject *obj)

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

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

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

void	dumpObjectTree () const

void	dumpObjectInfo () const

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

QVariant	property (const char *name) const

QList< QByteArray >	dynamicPropertyNames () const

QBindingStorage *	bindingStorage ()

const QBindingStorage *	bindingStorage () const

QObject *	parent () const

bool	inherits (const char *classname) const

Public Member Functions inherited from QPaintDevice
virtual	~QPaintDevice ()

bool	paintingActive () const

int	width () const

int	height () const

int	widthMM () const

int	heightMM () const

int	logicalDpiX () const

int	logicalDpiY () const

int	physicalDpiX () const

int	physicalDpiY () const

qreal	devicePixelRatio () const

qreal	devicePixelRatioF () const

int	colorCount () const

int	depth () const

Protected Member Functions
void	focusInEvent (QFocusEvent *e) override

void	focusOutEvent (QFocusEvent *e) override

void	changeEvent (QEvent *e) override

void	resizeEvent (QResizeEvent *e) override

void	paintEvent (QPaintEvent *e) override

void	showEvent (QShowEvent *e) override

void	hideEvent (QHideEvent *e) override

void	mousePressEvent (QMouseEvent *e) override

void	mouseReleaseEvent (QMouseEvent *e) override

void	keyPressEvent (QKeyEvent *e) override

void	keyReleaseEvent (QKeyEvent *e) override

void	contextMenuEvent (QContextMenuEvent *e) override

void	inputMethodEvent (QInputMethodEvent *) override

virtual void	initStyleOption (QStyleOptionComboBox *option) const

	QComboBox (QComboBoxPrivate &, QWidget *)

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

virtual void	mouseMoveEvent (QMouseEvent *event)

virtual void	enterEvent (QEnterEvent *event)

virtual void	leaveEvent (QEvent *event)

virtual void	moveEvent (QMoveEvent *event)

virtual void	closeEvent (QCloseEvent *event)

virtual void	actionEvent (QActionEvent *event)

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

int	metric (PaintDeviceMetric) const override

void	initPainter (QPainter *painter) const override

QPaintDevice *	redirected (QPoint *offset) const override

QPainter *	sharedPainter () const override

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

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

virtual bool	focusNextPrevChild (bool next)

bool	focusNextChild ()

bool	focusPreviousChild ()

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

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

int	senderSignalIndex () const

int	receivers (const char *signal) const

bool	isSignalConnected (const QMetaMethod &signal) const

virtual void	timerEvent (QTimerEvent *event)

virtual void	childEvent (QChildEvent *event)

virtual void	customEvent (QEvent *event)

virtual void	connectNotify (const QMetaMethod &signal)

virtual void	disconnectNotify (const QMetaMethod &signal)

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

Protected Member Functions inherited from QPaintDevice
	QPaintDevice () noexcept

Properties
bool	editable
	whether the combo box can be edited by the user More...

int	count
	the number of items in the combobox More...

QString	currentText
	the current text More...

int	currentIndex
	the index of the current item in the combobox. More...

QVariant	currentData
	the data for the current item More...

int	maxVisibleItems
	the maximum allowed size on screen of the combo box, measured in items More...

int	maxCount
	the maximum number of items allowed in the combobox More...

InsertPolicy	insertPolicy
	the policy used to determine where user-inserted items should appear in the combobox More...

SizeAdjustPolicy	sizeAdjustPolicy
	the policy describing how the size of the combobox changes when the content changes More...

int	minimumContentsLength
	the minimum number of characters that should fit into the combobox. More...

QSize	iconSize
	the size of the icons shown in the combobox. More...

QString	placeholderText
	Sets a placeholderText text shown when no valid index is set. More...

bool	duplicatesEnabled
	whether the user can enter duplicate items into the combobox More...

bool	frame
	whether the combo box draws itself with a frame More...

int	modelColumn
	the column in the model that is visible. More...

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

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

bool	enabled
	whether the widget is enabled More...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

QPalette	palette
	the widget's palette More...

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

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

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

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

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

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

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

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

bool	updatesEnabled
	whether updates are enabled More...

bool	visible
	whether the widget is visible More...

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

bool	maximized
	whether this widget is maximized More...

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

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

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

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

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

QIcon	windowIcon
	the widget's icon More...

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

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

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

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

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

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

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

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

QLocale	locale
	the widget's locale More...

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

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

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

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

static QWidget *	mouseGrabber ()

static QWidget *	keyboardGrabber ()

static QWidget *	find (WId)

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

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

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

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

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

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

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

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

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

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

static bool	disconnect (const QMetaObject::Connection &)

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

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

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

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

Protected Attributes inherited from QObject
QScopedPointer< QObjectData >	d_ptr

Protected Attributes inherited from QPaintDevice
ushort	painters

Related Functions inherited from QWidget
	setupUi (QWidget *widget)

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

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

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

	QObjectList

Detailed Description

The QComboBox widget is a combined button and popup list.

\inmodule QtWidgets

A QComboBox provides a means of presenting a list of options to the user in a way that takes up the minimum amount of screen space.

A combobox is a selection widget that displays the current item, and can pop up a list of selectable items. A combobox may be editable, allowing the user to modify each item in the list.

Comboboxes can contain pixmaps as well as strings; the insertItem() and setItemText() functions are suitably overloaded. For editable comboboxes, the function clearEditText() is provided, to clear the displayed string without changing the combobox's contents.

There are three signals emitted if the current item of a combobox changes, currentIndexChanged(), currentTextChanged() and activated(). currentIndexChanged() and currentTextChanged() are always emitted regardless if the change was done programmatically or by user interaction, while activated() is only emitted when the change is caused by user interaction. The highlighted() signal is emitted when the user highlights an item in the combobox popup list. All three signals exist in two versions, one with a QString argument and one with an int argument. If the user selects or highlights a pixmap, only the int signals are emitted. Whenever the text of an editable combobox is changed the editTextChanged() signal is emitted.

When the user enters a new string in an editable combobox, the widget may or may not insert it, and it can insert it in several locations. The default policy is \l InsertAtBottom but you can change this using setInsertPolicy().

It is possible to constrain the input to an editable combobox using QValidator; see setValidator(). By default, any input is accepted.

A combobox can be populated using the insert functions, insertItem() and insertItems() for example. Items can be changed with setItemText(). An item can be removed with removeItem() and all items can be removed with clear(). The text of the current item is returned by currentText(), and the text of a numbered item is returned with text(). The current item can be set with setCurrentIndex(). The number of items in the combobox is returned by count(); the maximum number of items can be set with setMaxCount(). You can allow editing using setEditable(). For editable comboboxes you can set auto-completion using setCompleter() and whether or not the user can add duplicates is set with setDuplicatesEnabled().

QComboBox uses the \l{Model/View Programming}{model/view framework} for its popup list and to store its items. By default a QStandardItemModel stores the items and a QListView subclass displays the popuplist. You can access the model and view directly (with model() and view()), but QComboBox also provides functions to set and get item data (e.g., setItemData() and itemText()). You can also set a new model and view (with setModel() and setView()). For the text and icon in the combobox label, the data in the model that has the Qt::DisplayRole and Qt::DecorationRole is used. Note that you cannot alter the \l{QAbstractItemView::}{SelectionMode} of the view(), e.g., by using \l{QAbstractItemView::}{setSelectionMode()}.

See also: QLineEdit, QSpinBox, QRadioButton, QButtonGroup

Definition at line 59 of file qcombobox.h.

Member Enumeration Documentation

◆ InsertPolicy

enum QComboBox::InsertPolicy

This enum specifies what the QComboBox should do when a new string is entered by the user.

\value NoInsert The string will not be inserted into the combobox. \value InsertAtTop The string will be inserted as the first item in the combobox. \value InsertAtCurrent The current item will be replaced by the string. \value InsertAtBottom The string will be inserted after the last item in the combobox. \value InsertAfterCurrent The string is inserted after the current item in the combobox. \value InsertBeforeCurrent The string is inserted before the current item in the combobox. \value InsertAlphabetically The string is inserted in the alphabetic order in the combobox.

Enumerator
NoInsert
InsertAtTop
InsertAtCurrent
InsertAtBottom
InsertAfterCurrent
InsertBeforeCurrent
InsertAlphabetically

Definition at line 103 of file qcombobox.h.

◆ SizeAdjustPolicy

enum QComboBox::SizeAdjustPolicy

This enum specifies how the size hint of the QComboBox should adjust when new content is added or content changes.

\value AdjustToContents The combobox will always adjust to the contents \value AdjustToContentsOnFirstShow The combobox will adjust to its contents the first time it is shown. \value AdjustToMinimumContentsLengthWithIcon The combobox will adjust to \l minimumContentsLength plus space for an icon. For performance reasons use this policy on large models.

Enumerator
AdjustToContents
AdjustToContentsOnFirstShow
AdjustToMinimumContentsLengthWithIcon

Definition at line 117 of file qcombobox.h.

Constructor & Destructor Documentation

◆ QComboBox() [1/2]

QComboBox::QComboBox ( QWidget * parent = nullptr )

explicit

Constructs a combobox with the given parent, using the default model QStandardItemModel.

Definition at line 958 of file qcombobox.cpp.

◆ ~QComboBox()

QComboBox::~QComboBox ( )

Destroys the combobox.

Definition at line 1442 of file qcombobox.cpp.

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◆ QComboBox() [2/2]

QComboBox::QComboBox	(	QComboBoxPrivate &	dd,
		QWidget *	parent
	)

protected

Definition at line 968 of file qcombobox.cpp.

Member Function Documentation

◆ activated

void QComboBox::activated ( int index )

signal

This signal is sent when the user chooses an item in the combobox. The item's index is passed. Note that this signal is sent even when the choice is not changed. If you need to know when the choice actually changes, use signal currentIndexChanged() or currentTextChanged().

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◆ addItem() [1/2]

void QComboBox::addItem	(	const QIcon &	icon,
		const QString &	text,
		const QVariant &	userData = `QVariant()`
	)

inline

Adds an item to the combobox with the given icon and text, and containing the specified userData (stored in the Qt::UserRole). The item is appended to the list of existing items.

Definition at line 262 of file qcombobox.h.

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◆ addItem() [2/2]

void QComboBox::addItem	(	const QString &	text,
		const QVariant &	userData = `QVariant()`
	)

inline

Adds an item to the combobox with the given text, and containing the specified userData (stored in the Qt::UserRole). The item is appended to the list of existing items.

Definition at line 260 of file qcombobox.h.

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◆ addItems()

void QComboBox::addItems ( const QStringList & texts )

inline

Adds each of the strings in the given texts to the combobox. Each item is appended to the list of existing items in turn.

Definition at line 171 of file qcombobox.h.

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◆ changeEvent()

void QComboBox::changeEvent ( QEvent * e )

overrideprotectedvirtual

\reimp

Reimplemented from QWidget.

Definition at line 2967 of file qcombobox.cpp.

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◆ clear

void QComboBox::clear ( )

slot

Clears the combobox, removing all items.

Note: If you have set an external model on the combobox this model will still be cleared when calling this function.

Definition at line 2901 of file qcombobox.cpp.

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◆ clearEditText

void QComboBox::clearEditText ( )

slot

Clears the contents of the line edit used for editing in the combobox.

Definition at line 2914 of file qcombobox.cpp.

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◆ contextMenuEvent()

void QComboBox::contextMenuEvent ( QContextMenuEvent * e )

overrideprotectedvirtual

\reimp

Reimplemented from QWidget.

Definition at line 3370 of file qcombobox.cpp.

◆ count()

int QComboBox::count ( ) const

Definition at line 1487 of file qcombobox.cpp.

◆ currentData()

QVariant QComboBox::currentData ( int role = Qt::UserRole ) const

Definition at line 2211 of file qcombobox.cpp.

◆ currentIndex()

int QComboBox::currentIndex ( ) const

Definition at line 2127 of file qcombobox.cpp.

◆ currentIndexChanged

void QComboBox::currentIndexChanged ( int index )

signal

Since: 4.1

This signal is sent whenever the currentIndex in the combobox changes either through user interaction or programmatically. The item's index is passed or -1 if the combobox becomes empty or the currentIndex was reset.

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◆ currentText()

QString QComboBox::currentText ( ) const

Definition at line 2193 of file qcombobox.cpp.

◆ currentTextChanged

void QComboBox::currentTextChanged ( const QString & text )

signal

Since: 5.0

This signal is sent whenever currentText changes. The new value is passed as text.

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◆ duplicatesEnabled()

bool QComboBox::duplicatesEnabled ( ) const

Definition at line 1535 of file qcombobox.cpp.

◆ editTextChanged

void QComboBox::editTextChanged ( const QString & text )

signal

This signal is emitted when the text in the combobox's line edit widget is changed. The new text is specified by text.

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◆ event()

bool QComboBox::event ( QEvent * event )

overridevirtual

\reimp

Reimplemented from QWidget.

Reimplemented in QFontComboBox.

Definition at line 3077 of file qcombobox.cpp.

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◆ findData()

int QComboBox::findData	(	const QVariant &	data,
		int	role = `Qt::UserRole`,
		Qt::MatchFlags	flags = `static_cast<Qt::MatchFlags>(Qt::MatchExactly\|Qt::MatchCaseSensitive)`
	)		const

Returns the index of the item containing the given data for the given role; otherwise returns -1.

The flags specify how the items in the combobox are searched.

Definition at line 1561 of file qcombobox.cpp.

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◆ findText()

int QComboBox::findText	(	const QString &	text,
		Qt::MatchFlags	flags = `static_cast<Qt::MatchFlags>(Qt::MatchExactly\|Qt::MatchCaseSensitive)`
	)		const

inline

Returns the index of the item containing the given text; otherwise returns -1.

The flags specify how the items in the combobox are searched.

Definition at line 97 of file qcombobox.h.

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◆ focusInEvent()

void QComboBox::focusInEvent ( QFocusEvent * e )

overrideprotectedvirtual

\reimp

Reimplemented from QWidget.

Definition at line 2942 of file qcombobox.cpp.

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◆ focusOutEvent()

void QComboBox::focusOutEvent ( QFocusEvent * e )

overrideprotectedvirtual

\reimp

Reimplemented from QWidget.

Definition at line 2958 of file qcombobox.cpp.

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◆ hasFrame()

bool QComboBox::hasFrame ( ) const

Definition at line 3482 of file qcombobox.cpp.

◆ hideEvent()

void QComboBox::hideEvent ( QHideEvent * e )

overrideprotectedvirtual

\reimp

Reimplemented from QWidget.

Definition at line 3069 of file qcombobox.cpp.

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◆ hidePopup()

void QComboBox::hidePopup ( )

virtual

Hides the list of items in the combobox if it is currently visible and resets the internal state, so that if the custom pop-up was shown inside the reimplemented showPopup(), then you also need to reimplement the hidePopup() function to hide your custom pop-up and call the base class implementation to reset the internal state whenever your custom pop-up widget is hidden.

See also: showPopup()

Definition at line 2836 of file qcombobox.cpp.

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◆ highlighted

void QComboBox::highlighted ( int index )

signal

This signal is sent when an item in the combobox popup list is highlighted by the user. The item's index is passed.

◆ iconSize()

QSize QComboBox::iconSize ( ) const

Definition at line 1664 of file qcombobox.cpp.

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◆ initStyleOption()

void QComboBox::initStyleOption ( QStyleOptionComboBox * option ) const

protectedvirtual

Initialize option with the values from this QComboBox. This method is useful for subclasses when they need a QStyleOptionComboBox, but don't want to fill in all the information themselves.

See also: QStyleOption::initFrom()

Definition at line 1226 of file qcombobox.cpp.

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◆ inputMethodEvent()

void QComboBox::inputMethodEvent ( QInputMethodEvent * e )

overrideprotectedvirtual

\reimp

Reimplemented from QWidget.

Definition at line 3409 of file qcombobox.cpp.

◆ inputMethodQuery() [1/2]

QVariant QComboBox::inputMethodQuery	(	Qt::InputMethodQuery	query,
		const QVariant &	argument
	)		const

Definition at line 3435 of file qcombobox.cpp.

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◆ inputMethodQuery() [2/2]

QVariant QComboBox::inputMethodQuery ( Qt::InputMethodQuery query ) const

overridevirtual

\reimp

Reimplemented from QWidget.

Definition at line 3425 of file qcombobox.cpp.

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◆ insertItem() [1/2]

void QComboBox::insertItem	(	int	index,
		const QIcon &	icon,
		const QString &	text,
		const QVariant &	userData = `QVariant()`
	)

Inserts the icon, text and userData (stored in the Qt::UserRole) into the combobox at the given index.

If the index is equal to or higher than the total number of items, the new item is appended to the list of existing items. If the index is zero or negative, the new item is prepended to the list of existing items.

See also: insertItems()

Definition at line 2274 of file qcombobox.cpp.

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◆ insertItem() [2/2]

void QComboBox::insertItem	(	int	index,
		const QString &	text,
		const QVariant &	userData = `QVariant()`
	)

inline

Inserts the text and userData (stored in the Qt::UserRole) into the combobox at the given index.

If the index is equal to or higher than the total number of items, the new item is appended to the list of existing items. If the index is zero or negative, the new item is prepended to the list of existing items.

See also: insertItems()

Definition at line 266 of file qcombobox.h.

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◆ insertItems()

void QComboBox::insertItems	(	int	index,
		const QStringList &	list
	)

Inserts the strings from the list into the combobox as separate items, starting at the index specified.

If the index is equal to or higher than the total number of items, the new items are appended to the list of existing items. If the index is zero or negative, the new items are prepended to the list of existing items.

See also: insertItem()

Definition at line 2325 of file qcombobox.cpp.

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◆ insertPolicy()

QComboBox::InsertPolicy QComboBox::insertPolicy ( ) const

Definition at line 1582 of file qcombobox.cpp.

◆ insertSeparator()

void QComboBox::insertSeparator ( int index )

Since: 4.4

Inserts a separator item into the combobox at the given index.

If the index is equal to or higher than the total number of items, the new item is appended to the list of existing items. If the index is zero or negative, the new item is prepended to the list of existing items.

See also: insertItem()

Definition at line 2374 of file qcombobox.cpp.

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◆ isEditable()

bool QComboBox::isEditable ( ) const

Definition at line 1737 of file qcombobox.cpp.

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◆ itemData()

QVariant QComboBox::itemData	(	int	index,
		int	role = `Qt::UserRole`
	)		const

Returns the data for the given role in the given index in the combobox, or an invalid QVariant if there is no data for this role.

Definition at line 2241 of file qcombobox.cpp.

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◆ itemDelegate()

QAbstractItemDelegate * QComboBox::itemDelegate ( ) const

Returns the item delegate used by the popup list view.

See also: setItemDelegate()

Definition at line 1970 of file qcombobox.cpp.

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◆ itemIcon()

QIcon QComboBox::itemIcon ( int index ) const

Returns the icon for the given index in the combobox.

Definition at line 2230 of file qcombobox.cpp.

◆ itemText()

QString QComboBox::itemText ( int index ) const

Returns the text for the given index in the combobox.

Definition at line 2220 of file qcombobox.cpp.

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◆ keyPressEvent()

void QComboBox::keyPressEvent ( QKeyEvent * e )

overrideprotectedvirtual

\reimp

Reimplemented from QWidget.

Definition at line 3180 of file qcombobox.cpp.

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◆ keyReleaseEvent()

void QComboBox::keyReleaseEvent ( QKeyEvent * e )

overrideprotectedvirtual

\reimp

Reimplemented from QWidget.

Definition at line 3323 of file qcombobox.cpp.

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◆ lineEdit()

QLineEdit * QComboBox::lineEdit ( ) const

Returns the line edit used to edit items in the combobox, or \nullptr if there is no line edit.

Only editable combo boxes have a line edit.

Definition at line 1884 of file qcombobox.cpp.

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◆ maxCount()

int QComboBox::maxCount ( ) const

Definition at line 1520 of file qcombobox.cpp.

◆ maxVisibleItems()

int QComboBox::maxVisibleItems ( ) const

Definition at line 1464 of file qcombobox.cpp.

◆ minimumContentsLength()

int QComboBox::minimumContentsLength ( ) const

Definition at line 1633 of file qcombobox.cpp.

◆ minimumSizeHint()

QSize QComboBox::minimumSizeHint ( ) const

overridevirtual

\reimp

Reimplemented from QWidget.

Definition at line 2470 of file qcombobox.cpp.

◆ model()

QAbstractItemModel * QComboBox::model ( ) const

Returns the model used by the combobox.

Definition at line 2003 of file qcombobox.cpp.

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◆ modelColumn()

int QComboBox::modelColumn ( ) const

Definition at line 3510 of file qcombobox.cpp.

◆ mousePressEvent()

void QComboBox::mousePressEvent ( QMouseEvent * e )

overrideprotectedvirtual

\reimp

Reimplemented from QWidget.

Definition at line 3117 of file qcombobox.cpp.

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◆ mouseReleaseEvent()

void QComboBox::mouseReleaseEvent ( QMouseEvent * e )

overrideprotectedvirtual

\reimp

Reimplemented from QWidget.

Definition at line 3169 of file qcombobox.cpp.

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◆ paintEvent()

void QComboBox::paintEvent ( QPaintEvent * e )

overrideprotectedvirtual

\reimp

Reimplemented from QWidget.

Definition at line 3033 of file qcombobox.cpp.

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◆ placeholderText()

QString QComboBox::placeholderText ( ) const

Definition at line 1719 of file qcombobox.cpp.

◆ removeItem()

void QComboBox::removeItem ( int index )

Removes the item at the given index from the combobox. This will update the current index if the index is removed.

This function does nothing if index is out of range.

Definition at line 2391 of file qcombobox.cpp.

◆ resizeEvent()

void QComboBox::resizeEvent ( QResizeEvent * e )

overrideprotectedvirtual

\reimp

Reimplemented from QWidget.

Definition at line 3024 of file qcombobox.cpp.

◆ rootModelIndex()

QModelIndex QComboBox::rootModelIndex ( ) const

Returns the root model item index for the items in the combobox.

See also: setRootModelIndex()

Definition at line 2097 of file qcombobox.cpp.

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◆ setCurrentIndex

void QComboBox::setCurrentIndex ( int index )

slot

Definition at line 2133 of file qcombobox.cpp.

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◆ setCurrentText

void QComboBox::setCurrentText ( const QString & text )

slot

Definition at line 2140 of file qcombobox.cpp.

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◆ setDuplicatesEnabled()

void QComboBox::setDuplicatesEnabled ( bool enable )

Definition at line 1541 of file qcombobox.cpp.

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◆ setEditable()

void QComboBox::setEditable ( bool editable )

Definition at line 1773 of file qcombobox.cpp.

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◆ setEditText

void QComboBox::setEditText ( const QString & text )

slot

Sets the text in the combobox's text edit.

Definition at line 2928 of file qcombobox.cpp.

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◆ setFrame()

void QComboBox::setFrame ( bool enable )

Definition at line 3489 of file qcombobox.cpp.

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◆ setIconSize()

void QComboBox::setIconSize ( const QSize & size )

Definition at line 1674 of file qcombobox.cpp.

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◆ setInsertPolicy()

void QComboBox::setInsertPolicy ( InsertPolicy policy )

Definition at line 1588 of file qcombobox.cpp.

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◆ setItemData()

void QComboBox::setItemData	(	int	index,
		const QVariant &	value,
		int	role = `Qt::UserRole`
	)

Sets the data role for the item on the given index in the combobox to the specified value.

Definition at line 2427 of file qcombobox.cpp.

◆ setItemDelegate()

void QComboBox::setItemDelegate ( QAbstractItemDelegate * delegate )

Sets the item delegate for the popup list view. The combobox takes ownership of the delegate.

Any existing delegate will be removed, but not deleted. QComboBox does not take ownership of delegate.

Warning: You should not share the same instance of a delegate between comboboxes, widget mappers or views. Doing so can cause incorrect or unintuitive editing behavior since each view connected to a given delegate may receive the \l{QAbstractItemDelegate::}{closeEditor()} signal, and attempt to access, modify or close an editor that has already been closed.

See also: itemDelegate()

Definition at line 1990 of file qcombobox.cpp.

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◆ setItemIcon()

void QComboBox::setItemIcon	(	int	index,
		const QIcon &	icon
	)

Sets the icon for the item on the given index in the combobox.

Definition at line 2414 of file qcombobox.cpp.

◆ setItemText()

void QComboBox::setItemText	(	int	index,
		const QString &	text
	)

Sets the text for the item on the given index in the combobox.

Definition at line 2402 of file qcombobox.cpp.

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◆ setLineEdit()

void QComboBox::setLineEdit ( QLineEdit * edit )

Sets the line edit to use instead of the current line edit widget.

The combo box takes ownership of the line edit.

Note: Since the combobox's line edit owns the QCompleter, any previous call to setCompleter() will no longer have any effect.

Definition at line 1816 of file qcombobox.cpp.

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◆ setMaxCount()

void QComboBox::setMaxCount ( int max )

Definition at line 1505 of file qcombobox.cpp.

◆ setMaxVisibleItems()

void QComboBox::setMaxVisibleItems ( int maxItems )

Definition at line 1470 of file qcombobox.cpp.

◆ setMinimumContentsLength()

void QComboBox::setMinimumContentsLength ( int characters )

Definition at line 1639 of file qcombobox.cpp.

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◆ setModel()

void QComboBox::setModel ( QAbstractItemModel * model )

virtual

Sets the model to be model. model must not be \nullptr. If you want to clear the contents of a model, call clear().

Note: If the combobox is editable, then the model will also be set on the completer of the line edit.

See also: clear() setCompleter()

Definition at line 2022 of file qcombobox.cpp.

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◆ setModelColumn()

void QComboBox::setModelColumn ( int visibleColumn )

Definition at line 3516 of file qcombobox.cpp.

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◆ setPlaceholderText()

void QComboBox::setPlaceholderText ( const QString & placeholderText )

Definition at line 1702 of file qcombobox.cpp.

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◆ setRootModelIndex()

void QComboBox::setRootModelIndex ( const QModelIndex & index )

Sets the root model item index for the items in the combobox.

See also: rootModelIndex()

Definition at line 2108 of file qcombobox.cpp.

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◆ setSizeAdjustPolicy()

void QComboBox::setSizeAdjustPolicy ( QComboBox::SizeAdjustPolicy policy )

Definition at line 1610 of file qcombobox.cpp.

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◆ setValidator()

void QComboBox::setValidator ( const QValidator * validator )

Sets the validator to use instead of the current validator.

Note: The validator is removed when the \l editable property becomes false.

Definition at line 1899 of file qcombobox.cpp.

◆ setView()

void QComboBox::setView ( QAbstractItemView * itemView )

Sets the view to be used in the combobox popup to the given itemView. The combobox takes ownership of the view.

Note: If you want to use the convenience views (like QListWidget, QTableWidget or QTreeWidget), make sure to call setModel() on the combobox with the convenience widgets model before calling this function.

Definition at line 2454 of file qcombobox.cpp.

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◆ showEvent()

void QComboBox::showEvent ( QShowEvent * e )

overrideprotectedvirtual

\reimp

Reimplemented from QWidget.

Definition at line 3055 of file qcombobox.cpp.

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◆ showPopup()

void QComboBox::showPopup ( )

virtual

Displays the list of items in the combobox. If the list is empty then no items will be shown.

If you reimplement this function to show a custom pop-up, make sure you call hidePopup() to reset the internal state.

See also: hidePopup()

Reimplemented in QFileDialogComboBox.

Definition at line 2580 of file qcombobox.cpp.

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◆ sizeAdjustPolicy()

QComboBox::SizeAdjustPolicy QComboBox::sizeAdjustPolicy ( ) const

Definition at line 1604 of file qcombobox.cpp.

◆ sizeHint()

QSize QComboBox::sizeHint ( ) const

overridevirtual

\reimp

This implementation caches the size hint to avoid resizing when the contents change dynamically. To invalidate the cached value change the \l sizeAdjustPolicy.

Reimplemented from QWidget.

Reimplemented in QFontComboBox.

Definition at line 2483 of file qcombobox.cpp.

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◆ textActivated

void QComboBox::textActivated ( const QString & text )

signal

Since: 5.14

This signal is sent when the user chooses an item in the combobox. The item's text is passed. Note that this signal is sent even when the choice is not changed. If you need to know when the choice actually changes, use signal currentIndexChanged() or currentTextChanged().

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◆ textHighlighted

void QComboBox::textHighlighted ( const QString & text )

signal

Since: 5.14

This signal is sent when an item in the combobox popup list is highlighted by the user. The item's text is passed.

◆ validator()

const QValidator * QComboBox::validator ( ) const

Returns the validator that is used to constrain text input for the combobox.

See also: editable

Definition at line 1912 of file qcombobox.cpp.

◆ view()

QAbstractItemView * QComboBox::view ( ) const

Returns the list view used for the combobox popup.

Definition at line 2439 of file qcombobox.cpp.

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Property Documentation

◆ count

QComboBox::count

read

the number of items in the combobox

By default, for an empty combo box, this property has a value of 0.

Definition at line 270 of file qcombobox.h.

◆ currentData

QComboBox::currentData

read

the data for the current item

Since: 5.2

By default, for an empty combo box or a combo box in which no current item is set, this property contains an invalid QVariant.

Definition at line 270 of file qcombobox.h.

◆ currentIndex

QComboBox::currentIndex

readwrite

the index of the current item in the combobox.

The current index can change when inserting or removing items.

By default, for an empty combo box or a combo box in which no current item is set, this property has a value of -1.

Definition at line 270 of file qcombobox.h.

◆ currentText

QComboBox::currentText

readwrite

the current text

If the combo box is editable, the current text is the value displayed by the line edit. Otherwise, it is the value of the current item or an empty string if the combo box is empty or no current item is set.

The setter setCurrentText() simply calls setEditText() if the combo box is editable. Otherwise, if there is a matching text in the list, currentIndex is set to the corresponding index.

See also: editable, setEditText()

Definition at line 270 of file qcombobox.h.

◆ duplicatesEnabled

QComboBox::duplicatesEnabled

readwrite

whether the user can enter duplicate items into the combobox

Note that it is always possible to programmatically insert duplicate items into the combobox.

By default, this property is false (duplicates are not allowed).

Definition at line 270 of file qcombobox.h.

◆ editable

QComboBox::editable

readwrite

whether the combo box can be edited by the user

By default, this property is false. The effect of editing depends on the insert policy.

Note: When disabling the editable state, the validator and completer are removed.

See also: InsertPolicy

Definition at line 270 of file qcombobox.h.

◆ frame

QComboBox::frame

readwrite

whether the combo box draws itself with a frame

If enabled (the default) the combo box draws itself inside a frame, otherwise the combo box draws itself without any frame.

Definition at line 270 of file qcombobox.h.

◆ iconSize

QComboBox::iconSize

readwrite

the size of the icons shown in the combobox.

Unless explicitly set this returns the default value of the current style. This size is the maximum size that icons can have; icons of smaller size are not scaled up.

Definition at line 270 of file qcombobox.h.

◆ insertPolicy

QComboBox::insertPolicy

readwrite

the policy used to determine where user-inserted items should appear in the combobox

The default value is \l InsertAtBottom, indicating that new items will appear at the bottom of the list of items.

See also: InsertPolicy

Definition at line 270 of file qcombobox.h.

◆ maxCount

QComboBox::maxCount

readwrite

the maximum number of items allowed in the combobox

Note: If you set the maximum number to be less then the current amount of items in the combobox, the extra items will be truncated. This also applies if you have set an external model on the combobox.

By default, this property's value is derived from the highest signed integer available (typically 2147483647).

Definition at line 270 of file qcombobox.h.

◆ maxVisibleItems

QComboBox::maxVisibleItems

readwrite

the maximum allowed size on screen of the combo box, measured in items

By default, this property has a value of 10.

Note: This property is ignored for non-editable comboboxes in styles that returns true for QStyle::SH_ComboBox_Popup such as the Mac style or the Gtk+ Style.

Definition at line 270 of file qcombobox.h.

◆ minimumContentsLength

QComboBox::minimumContentsLength

readwrite

the minimum number of characters that should fit into the combobox.

The default value is 0.

If this property is set to a positive value, the minimumSizeHint() and sizeHint() take it into account.

See also: sizeAdjustPolicy

Definition at line 270 of file qcombobox.h.

◆ modelColumn

QComboBox::modelColumn

readwrite

the column in the model that is visible.

If set prior to populating the combo box, the pop-up view will not be affected and will show the first column (using this property's default value).

By default, this property has a value of 0.

Note: In an editable combobox, the visible column will also become the \l{QCompleter::completionColumn}{completion column}.

Definition at line 270 of file qcombobox.h.

◆ placeholderText

QComboBox::placeholderText

readwrite

Sets a placeholderText text shown when no valid index is set.

The placeholderText will be shown when an invalid index is set. The text is not accessible in the dropdown list. When this function is called before items are added the placeholder text will be shown, otherwise you have to call setCurrentIndex(-1) programmatically if you want to show the placeholder text. Set an empty placeholder text to reset the setting.

When the QComboBox is editable, use QLineEdit::setPlaceholderText() instead.

Since: 5.15

Definition at line 270 of file qcombobox.h.

◆ sizeAdjustPolicy

QComboBox::sizeAdjustPolicy

readwrite

the policy describing how the size of the combobox changes when the content changes

The default value is \l AdjustToContentsOnFirstShow.

See also: SizeAdjustPolicy

Definition at line 270 of file qcombobox.h.

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

src/widgets/widgets/qcombobox.h
src/widgets/widgets/qcombobox.cpp

Public Types

Public Slots

Signals

Public Member Functions

Protected Member Functions

Properties

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ InsertPolicy

◆ SizeAdjustPolicy

Constructor & Destructor Documentation

◆ QComboBox() [1/2]

◆ ~QComboBox()

◆ QComboBox() [2/2]

Member Function Documentation

◆ activated

◆ addItem() [1/2]

◆ addItem() [2/2]

◆ addItems()

◆ changeEvent()

◆ clear

◆ clearEditText

◆ contextMenuEvent()

◆ count()

◆ currentData()

◆ currentIndex()

◆ currentIndexChanged

◆ currentText()

◆ currentTextChanged

◆ duplicatesEnabled()

◆ editTextChanged

◆ event()

◆ findData()

◆ findText()

◆ focusInEvent()

◆ focusOutEvent()

◆ hasFrame()

◆ hideEvent()

◆ hidePopup()

◆ highlighted

◆ iconSize()

◆ initStyleOption()

◆ inputMethodEvent()

◆ inputMethodQuery() [1/2]

◆ inputMethodQuery() [2/2]

◆ insertItem() [1/2]

◆ insertItem() [2/2]

◆ insertItems()

◆ insertPolicy()

◆ insertSeparator()

◆ isEditable()

◆ itemData()

◆ itemDelegate()

◆ itemIcon()

◆ itemText()

◆ keyPressEvent()

◆ keyReleaseEvent()

◆ lineEdit()

◆ maxCount()

◆ maxVisibleItems()

◆ minimumContentsLength()

◆ minimumSizeHint()

◆ model()

◆ modelColumn()

◆ mousePressEvent()

◆ mouseReleaseEvent()

◆ paintEvent()

◆ placeholderText()

◆ removeItem()

◆ resizeEvent()

◆ rootModelIndex()

◆ setCurrentIndex

◆ setCurrentText

◆ setDuplicatesEnabled()

◆ setEditable()

◆ setEditText

◆ setFrame()

◆ setIconSize()

◆ setInsertPolicy()