The QSensorGestureRecognizer class is the base class for a sensor gesture recognizer. 更多...
头: | #include <QSensorGestureRecognizer> |
qmake: | QT += sensors |
Since: | Qt 5.1 |
继承: | QObject |
该类在 Qt 5.1 引入。
QSensorGestureRecognizer (QObject * parent = Q_NULLPTR) | |
virtual | ~QSensorGestureRecognizer () |
void | createBackend () |
QStringList | gestureSignals () const |
virtual QString | id () const = 0 |
virtual bool | isActive () = 0 |
void | startBackend () |
void | stopBackend () |
void | detected ( const QString & ) |
virtual void | create () = 0 |
virtual bool | start () = 0 |
virtual bool | stop () = 0 |
QSensorGesture recognizer developers should sub-class this to implement their own recognizer.
All sensor gesture recognizers have a detected( QString ) signal. Implementors can use this and send recognizer specific gestures, such as detected("shake_left") or implement custom signals such as shakeLeft().
These custom signals will be available in the QSensorGesture object at runtime.
另请参阅 QSensorGestureRecognizer::gestureSignals ().
Constructs the QSensorGestureRecognizer with parent 作为父级。
[signal]
void
QSensorGestureRecognizer::
detected
(
const QString &
)
Signals when a gesture is recognized. Implementors can use this signal to send recognizer-specific gestures, such as
detected("shake_left")
or implement custom signals such as
shakeLeft()
.
The custom signals are available in the QSensorGesture object at runtime.
[虚拟]
QSensorGestureRecognizer::
~QSensorGestureRecognizer
()
Destroy the QSensorGestureRecognizer
[pure virtual protected]
void
QSensorGestureRecognizer::
create
()
Called by QSensorGesture object constructor to create the recognizers backend.
Implementors would use this to instantiate QSensors and connect signals.
调用 QSensorGestureRecognizer::create () if the recognizer is valid.
Returns a list of signals that this recognizer supports.
Note that all signals declared will be exported to the QSensorGesture object. If you need to use signals that are not exported, you should use a private class to do so.
[pure virtual]
QString
QSensorGestureRecognizer::
id
() const
Returns the identifier for this recognizer.
[pure virtual]
bool
QSensorGestureRecognizer::
isActive
()
Returns true if this recognizer is active, otherwise false.
[pure virtual protected]
bool
QSensorGestureRecognizer::
start
()
Called by QSensorGesture::startDetection () to start this recognizer. Implementors should start the sensors. Returns true if the operation is successful.
调用 QSensorGestureRecognizer::start () if the recognizer isn't already initialized. This is called by the QSensorGesture object, so please use that instead.
另请参阅 QSensorGesture::startDetection ().
[pure virtual protected]
bool
QSensorGestureRecognizer::
stop
()
Called by QSensorGesture::stopDetection () to stop this recognizer. Returns true if the call succeeds, otherwise false.
Implementors should stop the sensors.
调用 QSensorGestureRecognizer::stop () if no other clients are using it. This is called by the QSensorGesture object, so please use that instead.
另请参阅 QSensorGesture::stopDetection ().