QInputDeviceManager acts as a communication hub between QtGui and the input handlers. More...

#include <qinputdevicemanager_p.h>

Inheritance diagram for QInputDeviceManager:

Collaboration diagram for QInputDeviceManager:

Public Types
enum	DeviceType { DeviceTypeUnknown , DeviceTypePointer , DeviceTypeKeyboard , DeviceTypeTouch , DeviceTypeTablet , NumDeviceTypes }

Signals
void	deviceListChanged (QInputDeviceManager::DeviceType type)

void	cursorPositionChangeRequested (const QPoint &pos)

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
	QInputDeviceManager (QObject *parent=nullptr)

	~QInputDeviceManager () override

int	deviceCount (DeviceType type) const

void	setCursorPos (const QPoint &pos)

Qt::KeyboardModifiers	keyboardModifiers () const

void	setKeyboardModifiers (Qt::KeyboardModifiers mods)

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`.

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

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)

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

Properties inherited from QObject
QString	objectName
	the name of this object

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

QInputDeviceManager acts as a communication hub between QtGui and the input handlers.

On embedded platforms the input handling code is either compiled into the platform plugin or is loaded dynamically as a generic plugin without any interface. The input handler in use may also change between each run (e.g. evdevmouse/keyboard/touch vs. libinput). QWindowSystemInterface is too limiting when Qt (the platform plugin) is acting as a windowing system, and is one way only.

QInputDeviceManager solves this by providing a global object that is used to communicate from the input handlers to the rest of Qt (e.g. the number of connected mice, which may be important information for the cursor drawing code), and vice-versa (e.g. to indicate to the input handler that a manual cursor position change was requested by the application via QCursor::setPos and thus any internal state has to be updated accordingly).

Definition at line 25 of file qinputdevicemanager_p.h.

Member Enumeration Documentation

◆ DeviceType

enum QInputDeviceManager::DeviceType

Enumerator
DeviceTypeUnknown
DeviceTypePointer
DeviceTypeKeyboard
DeviceTypeTouch
DeviceTypeTablet
NumDeviceTypes

Definition at line 31 of file qinputdevicemanager_p.h.

Constructor & Destructor Documentation

◆ QInputDeviceManager()

QInputDeviceManager::QInputDeviceManager ( QObject * parent = nullptr )

explicit

Definition at line 30 of file qinputdevicemanager.cpp.

◆ ~QInputDeviceManager()

QInputDeviceManager::~QInputDeviceManager ( )

overridedefault

Member Function Documentation

◆ cursorPositionChangeRequested

void QInputDeviceManager::cursorPositionChangeRequested ( const QPoint & pos )

signal

◆ deviceCount()

int QInputDeviceManager::deviceCount ( DeviceType type ) const

Definition at line 38 of file qinputdevicemanager.cpp.

◆ deviceListChanged

void QInputDeviceManager::deviceListChanged ( QInputDeviceManager::DeviceType type )

signal

◆ keyboardModifiers()

Qt::KeyboardModifiers QInputDeviceManager::keyboardModifiers ( ) const

Returns: the keyboard modifier state stored in the QInputDeviceManager object.

Keyboard input handlers are expected to keep this up-to-date via setKeyboardModifiers().

Querying the state via this function (e.g. from a mouse handler that needs to include the modifier state in mouse events) is the preferred alternative over QGuiApplication::keyboardModifiers() since the latter may not report the current state due to asynchronous QPA event processing.

Definition at line 74 of file qinputdevicemanager.cpp.

◆ setCursorPos()

void QInputDeviceManager::setCursorPos ( const QPoint & pos )

Definition at line 58 of file qinputdevicemanager.cpp.

◆ setKeyboardModifiers()

void QInputDeviceManager::setKeyboardModifiers ( Qt::KeyboardModifiers mods )

Definition at line 80 of file qinputdevicemanager.cpp.

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

qtbase/src/gui/kernel/qinputdevicemanager_p.h (05fc3aef53348fb58be6308076e000825b704e58)
qtbase/src/gui/kernel/qinputdevicemanager.cpp (05fc3aef53348fb58be6308076e000825b704e58)

Public Types

Signals

Public Member Functions

Additional Inherited Members