The QPanGesture class describes a panning gesture made by the user.\inmodule QtWidgets. More...

#include <qgesture.h>

Inheritance diagram for QPanGesture:

Collaboration diagram for QPanGesture:

Public Member Functions
	QPanGesture (QObject *parent=nullptr)

	~QPanGesture ()
	Destructor.

QPointF	lastOffset () const

QPointF	offset () const

QPointF	delta () const

qreal	acceleration () const

void	setLastOffset (const QPointF &value)

void	setOffset (const QPointF &value)

void	setAcceleration (qreal value)

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

	~QGesture ()
	Destroys the gesture object.

Qt::GestureType	gestureType () const

Qt::GestureState	state () const

QPointF	hotSpot () const

void	setHotSpot (const QPointF &value)

bool	hasHotSpot () const

void	unsetHotSpot ()

void	setGestureCancelPolicy (GestureCancelPolicy policy)

GestureCancelPolicy	gestureCancelPolicy () const

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`.

Properties
QPointF	lastOffset
	the last offset recorded for this gesture

QPointF	offset
	the total offset from the first input position to the current input position

QPointF	delta
	the offset from the previous input position to the current input

qreal	acceleration
	the acceleration in the motion of the touch point for this gesture

Properties inherited from QGesture
Qt::GestureState	state
	the current state of the gesture

Qt::GestureType	gestureType
	the type of the gesture

QGesture::GestureCancelPolicy	gestureCancelPolicy
	the policy for deciding what happens on accepting a gesture

QPointF	hotSpot
	The point that is used to find the receiver for the gesture event.

bool	hasHotSpot
	whether the gesture has a hot-spot

Properties inherited from QObject
QString	objectName
	the name of this object

Friends
class	QPanGestureRecognizer

class	QWinNativePanGestureRecognizer

Additional Inherited Members
Public Types inherited from QGesture
enum	GestureCancelPolicy { CancelNone = 0 , CancelAllInContext }
	This enum describes how accepting a gesture can cancel other gestures automatically. More...

Public Slots inherited from QObject
void	deleteLater ()
	\threadsafe

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.

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 QGesture
	QGesture (QGesturePrivate &dd, QObject *parent)

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

The QPanGesture class describes a panning gesture made by the user.

\inmodule QtWidgets.

Since: 4.6

For an overview of gesture handling in Qt and information on using gestures in your applications, see the \l{Gestures in Widgets and Graphics View} document.

See also: QPinchGesture, QSwipeGesture

Definition at line 72 of file qgesture.h.

Constructor & Destructor Documentation

◆ QPanGesture()

QPanGesture::QPanGesture ( QObject * parent = nullptr )

explicit

Definition at line 264 of file qgesture.cpp.

References QGesture::gestureType, and Qt::PanGesture.

◆ ~QPanGesture()

QPanGesture::~QPanGesture ( )

Destructor.

Definition at line 273 of file qgesture.cpp.

Member Function Documentation

◆ acceleration()

qreal QPanGesture::acceleration ( ) const

Definition at line 293 of file qgesture.cpp.

◆ delta()

QPointF QPanGesture::delta ( ) const

Definition at line 287 of file qgesture.cpp.

References d.

◆ lastOffset()

QPointF QPanGesture::lastOffset ( ) const

Definition at line 277 of file qgesture.cpp.

◆ offset()

QPointF QPanGesture::offset ( ) const

Definition at line 282 of file qgesture.cpp.

◆ setAcceleration()

void QPanGesture::setAcceleration ( qreal value )

Definition at line 308 of file qgesture.cpp.

◆ setLastOffset()

void QPanGesture::setLastOffset ( const QPointF & value )

Definition at line 298 of file qgesture.cpp.

◆ setOffset()

void QPanGesture::setOffset ( const QPointF & value )

Definition at line 303 of file qgesture.cpp.

Friends And Related Symbol Documentation

◆ QPanGestureRecognizer

friend class QPanGestureRecognizer

friend

Definition at line 97 of file qgesture.h.

◆ QWinNativePanGestureRecognizer

friend class QWinNativePanGestureRecognizer

friend

Definition at line 98 of file qgesture.h.

Property Documentation

◆ acceleration

QPanGesture::acceleration

readwrite

the acceleration in the motion of the touch point for this gesture

Definition at line 80 of file qgesture.h.

Referenced by operator<<().

◆ delta

QPanGesture::delta

read

the offset from the previous input position to the current input

This is essentially the same as the difference between offset() and lastOffset().

Definition at line 79 of file qgesture.h.

Referenced by operator<<().

◆ lastOffset

QPanGesture::lastOffset

readwrite

the last offset recorded for this gesture

The last offset contains the change in position of the user's input as reported in the \l offset property when a previous gesture event was delivered for this gesture.

If no previous event was delivered with information about this gesture (i.e., this gesture object contains information about the first movement in the gesture) then this property contains a zero size.

Definition at line 77 of file qgesture.h.

Referenced by operator<<(), and QPanGestureRecognizer::reset().

◆ offset

QPanGesture::offset

readwrite

the total offset from the first input position to the current input position

The offset measures the total change in position of the user's input covered by the gesture on the input device.

Definition at line 78 of file qgesture.h.

Referenced by operator<<().

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

qtbase/src/widgets/kernel/qgesture.h (05fc3aef53348fb58be6308076e000825b704e58)
qtbase/src/widgets/kernel/qgesture.cpp (05fc3aef53348fb58be6308076e000825b704e58)

Public Member Functions

Properties

Friends

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QPanGesture()

◆ ~QPanGesture()

Member Function Documentation

◆ acceleration()

◆ delta()

◆ lastOffset()

◆ offset()

◆ setAcceleration()

◆ setLastOffset()

◆ setOffset()

Friends And Related Symbol Documentation

◆ QPanGestureRecognizer

◆ QWinNativePanGestureRecognizer

Property Documentation

◆ acceleration

◆ delta

◆ lastOffset

◆ offset