#include <qquickitem_p.h>

Inheritance diagram for QQuickKeyNavigationAttached:

Collaboration diagram for QQuickKeyNavigationAttached:

Public Types
enum	Priority { BeforeItem , AfterItem }

Signals
void	leftChanged ()

void	rightChanged ()

void	upChanged ()

void	downChanged ()

void	tabChanged ()

void	backtabChanged ()

void	priorityChanged ()

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

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

Public Member Functions
	QQuickKeyNavigationAttached (QObject *=nullptr)
	\qmltype KeyNavigation \instantiates QQuickKeyNavigationAttached \inqmlmodule QtQuick

QQuickItem *	left () const

void	setLeft (QQuickItem *)

QQuickItem *	right () const

void	setRight (QQuickItem *)

QQuickItem *	up () const

void	setUp (QQuickItem *)

QQuickItem *	down () const

void	setDown (QQuickItem *)

QQuickItem *	tab () const

void	setTab (QQuickItem *)

QQuickItem *	backtab () const

void	setBacktab (QQuickItem *)

Priority	priority () const
	\qmlattachedproperty enumeration QtQuick::KeyNavigation::priority

void	setPriority (Priority)

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

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

virtual bool	event (QEvent *event)
	This virtual function receives events to an object and should return true if the event e was recognized and processed.

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

QString	objectName () const

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

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

QBindable< QString >	bindableObjectName ()

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

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

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

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

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

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

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

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

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

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

void	killTimer (Qt::TimerId id)

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

QList< QByteArray >	dynamicPropertyNames () const

QBindingStorage *	bindingStorage ()

const QBindingStorage *	bindingStorage () const

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

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

Public Member Functions inherited from QQuickItemKeyFilter
	QQuickItemKeyFilter (QQuickItem *=nullptr)

virtual	~QQuickItemKeyFilter ()

virtual void	shortcutOverrideEvent (QKeyEvent *event)

virtual void	componentComplete ()

Static Public Member Functions
static QQuickKeyNavigationAttached *	qmlAttachedProperties (QObject *)

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

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

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

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

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

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

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

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

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

Properties
QQuickItem *	left

QQuickItem *	right

QQuickItem *	up

QQuickItem *	down

QQuickItem *	tab

QQuickItem *	backtab

Priority	priority

Properties inherited from QObject
QString	objectName
	the name of this object

Private Member Functions
void	keyPressed (QKeyEvent *event, bool post) override

void	keyReleased (QKeyEvent *event, bool post) override

Additional Inherited Members
Public Slots inherited from QObject
void	deleteLater ()
	\threadsafe

Public Attributes inherited from QQuickItemKeyFilter
bool	m_processPost

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

int	senderSignalIndex () const

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

bool	isSignalConnected (const QMetaMethod &signal) const

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

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

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

virtual void	connectNotify (const QMetaMethod &signal)

virtual void	disconnectNotify (const QMetaMethod &signal)

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

Protected Attributes inherited from QObject
QScopedPointer< QObjectData >	d_ptr

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

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

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

	QObjectList
	\macro Q_CLASSINFO(Name, Value)

Detailed Description

Definition at line 769 of file qquickitem_p.h.

Member Enumeration Documentation

◆ Priority

enum QQuickKeyNavigationAttached::Priority

Enumerator
BeforeItem
AfterItem

Definition at line 803 of file qquickitem_p.h.

Constructor & Destructor Documentation

◆ QQuickKeyNavigationAttached()

QQuickKeyNavigationAttached::QQuickKeyNavigationAttached ( QObject * parent = nullptr )

\qmltype KeyNavigation \instantiates QQuickKeyNavigationAttached \inqmlmodule QtQuick

Supports key navigation by arrow keys.

Key-based user interfaces commonly allow the use of arrow keys to navigate between focusable items. The KeyNavigation attached property enables this behavior by providing a convenient way to specify the item that should gain focus when an arrow or tab key is pressed.

The following example provides key navigation for a 2x2 grid of items:

import QtQuick
 
Grid {
    width: 100; height: 100
    columns: 2
 
    Rectangle {
        id: topLeft
        width: 50; height: 50
        color: focus ? "red" : "lightgray"
        focus: true
 
        KeyNavigation.right: topRight
        KeyNavigation.down: bottomLeft
    }
 
    Rectangle {
        id: topRight
        width: 50; height: 50
        color: focus ? "red" : "lightgray"
 
        KeyNavigation.left: topLeft
        KeyNavigation.down: bottomRight
    }
 
    Rectangle {
        id: bottomLeft
        width: 50; height: 50
        color: focus ? "red" : "lightgray"
 
        KeyNavigation.right: bottomRight
        KeyNavigation.up: topLeft
    }
 
    Rectangle {
        id: bottomRight
        width: 50; height: 50
        color: focus ? "red" : "lightgray"
 
        KeyNavigation.left: bottomLeft
        KeyNavigation.up: topRight
    }
}

The top-left item initially receives focus by setting \l {Item::}{focus} to true. When an arrow key is pressed, the focus will move to the appropriate item, as defined by the value that has been set for the KeyNavigation \l left, \l right, \l up or \l down properties.

Note that if a KeyNavigation attached property receives the key press and release events for a requested arrow or tab key, the event is accepted and does not propagate any further.

By default, KeyNavigation receives key events after the item to which it is attached. If the item accepts the key event, the KeyNavigation attached property will not receive an event for that key. Setting the \l priority property to KeyNavigation.BeforeItem allows the event to be used for key navigation before the item, rather than after.

If the item to which the focus is switching is not enabled or visible, an attempt will be made to skip this item and focus on the next. This is possible if there are a chain of items with the same KeyNavigation handler. If multiple items in a row are not enabled or visible, they will also be skipped.

KeyNavigation will implicitly set the other direction to return focus to this item. So if you set \l left to another item, \l right will be set on that item's KeyNavigation to set focus back to this item. However, if that item's KeyNavigation has had right explicitly set then no change will occur. This means that the example above could achieve the same behavior without specifying KeyNavigation.right or KeyNavigation.down for any of the items.

See also: {Keys}{Keys attached property}

\qmlattachedproperty Item QtQuick::KeyNavigation::left

This property holds the item to assign focus to when the left cursor key is pressed.

\qmlattachedproperty Item QtQuick::KeyNavigation::right

This property holds the item to assign focus to when the right cursor key is pressed.

\qmlattachedproperty Item QtQuick::KeyNavigation::up

This property holds the item to assign focus to when the up cursor key is pressed.

\qmlattachedproperty Item QtQuick::KeyNavigation::down

This property holds the item to assign focus to when the down cursor key is pressed.

\qmlattachedproperty Item QtQuick::KeyNavigation::tab

This property holds the item to assign focus to when the Tab key is pressed.

\qmlattachedproperty Item QtQuick::KeyNavigation::backtab

This property holds the item to assign focus to when the Shift+Tab key combination (Backtab) is pressed.

Definition at line 430 of file qquickitem.cpp.

References QQuickItemKeyFilter::m_processPost.

Referenced by qmlAttachedProperties().

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Member Function Documentation

◆ backtab()

QQuickItem * QQuickKeyNavigationAttached::backtab ( ) const

Definition at line 553 of file qquickitem.cpp.

References d.

◆ backtabChanged

void QQuickKeyNavigationAttached::backtabChanged ( )

signal

Referenced by setBacktab().

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◆ down()

QQuickItem * QQuickKeyNavigationAttached::down ( ) const

Definition at line 509 of file qquickitem.cpp.

References d.

◆ downChanged

void QQuickKeyNavigationAttached::downChanged ( )

signal

Referenced by setDown().

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◆ keyPressed()

void QQuickKeyNavigationAttached::keyPressed	(	QKeyEvent *	event,
		bool	post )

overrideprivatevirtual

Reimplemented from QQuickItemKeyFilter.

Definition at line 602 of file qquickitem.cpp.

References Qt::BacktabFocusReason, d, QQuickItemPrivate::get(), Qt::Key_Backtab, Qt::Key_Down, Qt::Key_Left, Qt::Key_Right, Qt::Key_Tab, Qt::Key_Up, QQuickItemKeyFilter::keyPressed(), QQuickItemKeyFilter::m_processPost, QObject::parent(), post(), and Qt::TabFocusReason.

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◆ keyReleased()

void QQuickKeyNavigationAttached::keyReleased	(	QKeyEvent *	event,
		bool	post )

overrideprivatevirtual

Reimplemented from QQuickItemKeyFilter.

Definition at line 665 of file qquickitem.cpp.

References d, QQuickItemPrivate::get(), Qt::Key_Backtab, Qt::Key_Down, Qt::Key_Left, Qt::Key_Right, Qt::Key_Tab, Qt::Key_Up, QQuickItemKeyFilter::keyReleased(), QQuickItemKeyFilter::m_processPost, QObject::parent(), and post().

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◆ left()

QQuickItem * QQuickKeyNavigationAttached::left ( ) const

Definition at line 443 of file qquickitem.cpp.

References d.

◆ leftChanged

void QQuickKeyNavigationAttached::leftChanged ( )

signal

Referenced by setLeft().

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◆ priority()

QQuickKeyNavigationAttached::Priority QQuickKeyNavigationAttached::priority ( ) const

\qmlattachedproperty enumeration QtQuick::KeyNavigation::priority

This property determines whether the keys are processed before or after the attached item's own key handling.

\value KeyNavigation.BeforeItem process the key events before normal item key processing. If the event is used for key navigation, it will be accepted and will not be passed on to the item. \value KeyNavigation.AfterItem (default) process the key events after normal item key handling. If the item accepts the key event it will not be handled by the KeyNavigation attached property handler.

Definition at line 588 of file qquickitem.cpp.

References AfterItem, BeforeItem, and QQuickItemKeyFilter::m_processPost.

◆ priorityChanged

void QQuickKeyNavigationAttached::priorityChanged ( )

signal

Referenced by setPriority().

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◆ qmlAttachedProperties()

QQuickKeyNavigationAttached * QQuickKeyNavigationAttached::qmlAttachedProperties ( QObject * obj )

static

Definition at line 438 of file qquickitem.cpp.

References QQuickKeyNavigationAttached().

Referenced by QQuickFileDialogImpl::componentComplete(), and QQuickFolderDialogImpl::componentComplete().

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◆ right()

QQuickItem * QQuickKeyNavigationAttached::right ( ) const

Definition at line 465 of file qquickitem.cpp.

References d.

◆ rightChanged

void QQuickKeyNavigationAttached::rightChanged ( )

signal

Referenced by setRight().

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◆ setBacktab()

void QQuickKeyNavigationAttached::setBacktab ( QQuickItem * i )

Definition at line 559 of file qquickitem.cpp.

References backtabChanged(), d, emit, i, other(), QObject::parent(), and qobject_cast< QQuickItem * >().

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◆ setDown()

void QQuickKeyNavigationAttached::setDown ( QQuickItem * i )

Definition at line 515 of file qquickitem.cpp.

References d, downChanged(), emit, i, other(), QObject::parent(), and qobject_cast< QQuickItem * >().

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◆ setLeft()

void QQuickKeyNavigationAttached::setLeft ( QQuickItem * i )

Definition at line 449 of file qquickitem.cpp.

References d, emit, i, leftChanged(), other(), QObject::parent(), and qobject_cast< QQuickItem * >().

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◆ setPriority()

void QQuickKeyNavigationAttached::setPriority ( Priority order )

Definition at line 593 of file qquickitem.cpp.

References AfterItem, emit, QQuickItemKeyFilter::m_processPost, and priorityChanged().

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◆ setRight()

void QQuickKeyNavigationAttached::setRight ( QQuickItem * i )

Definition at line 471 of file qquickitem.cpp.

References d, emit, i, other(), QObject::parent(), qobject_cast< QQuickItem * >(), and rightChanged().

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◆ setTab()

void QQuickKeyNavigationAttached::setTab ( QQuickItem * i )

Definition at line 537 of file qquickitem.cpp.

References d, emit, i, other(), QObject::parent(), qobject_cast< QQuickItem * >(), and tabChanged().

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◆ setUp()

void QQuickKeyNavigationAttached::setUp ( QQuickItem * i )

Definition at line 493 of file qquickitem.cpp.

References d, emit, i, other(), QObject::parent(), qobject_cast< QQuickItem * >(), and upChanged().

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◆ tab()

QQuickItem * QQuickKeyNavigationAttached::tab ( ) const

Definition at line 531 of file qquickitem.cpp.

References d.

◆ tabChanged

void QQuickKeyNavigationAttached::tabChanged ( )

signal

Referenced by setTab().

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◆ up()

QQuickItem * QQuickKeyNavigationAttached::up ( ) const

Definition at line 487 of file qquickitem.cpp.

References d.

◆ upChanged

void QQuickKeyNavigationAttached::upChanged ( )

signal

Referenced by setUp().

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Property Documentation

◆ backtab

QQuickItem * QQuickKeyNavigationAttached::backtab

readwrite

Definition at line 779 of file qquickitem_p.h.

◆ down

QQuickItem * QQuickKeyNavigationAttached::down

readwrite

Definition at line 777 of file qquickitem_p.h.

◆ left

QQuickItem * QQuickKeyNavigationAttached::left

readwrite

Definition at line 774 of file qquickitem_p.h.

◆ priority

Priority QQuickKeyNavigationAttached::priority

readwrite

Definition at line 780 of file qquickitem_p.h.

◆ right

QQuickItem * QQuickKeyNavigationAttached::right

readwrite

Definition at line 775 of file qquickitem_p.h.

◆ tab

QQuickItem * QQuickKeyNavigationAttached::tab

readwrite

Definition at line 778 of file qquickitem_p.h.

◆ up

QQuickItem * QQuickKeyNavigationAttached::up

readwrite

Definition at line 776 of file qquickitem_p.h.

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

qtdeclarative/src/quick/items/qquickitem_p.h (3f3787a6b4f54f2603598e49eeebb58532aa2afa)
qtdeclarative/src/quick/items/qquickitem.cpp (ecb0f934065288fe9b33aa916d9b04301eb383a0)

Public Types

Signals

Public Member Functions

Static Public Member Functions

Properties

Private Member Functions

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ Priority

Constructor & Destructor Documentation

◆ QQuickKeyNavigationAttached()

Member Function Documentation

◆ backtab()

◆ backtabChanged

◆ down()

◆ downChanged

◆ keyPressed()

◆ keyReleased()

◆ left()

◆ leftChanged

◆ priority()

◆ priorityChanged

◆ qmlAttachedProperties()

◆ right()

◆ rightChanged

◆ setBacktab()

◆ setDown()

◆ setLeft()

◆ setPriority()

◆ setRight()

◆ setTab()

◆ setUp()

◆ tab()

◆ tabChanged

◆ up()

◆ upChanged

Property Documentation

◆ backtab

◆ down

◆ left

◆ priority

◆ right

◆ tab

◆ up