QEventTransition露
- PyQt5.QtCore.QEventTransition
Inherits from QAbstractTransition.
Inherited by QKeyEventTransition, QMouseEventTransition.
Description露
The QEventTransition class provides a QObject-specific transition for Qt events.
A QEventTransition object binds an event to a particular QObject. QEventTransition is part of The State Machine Framework.
Example:
QPushButton *button = ...;
QState *s1 = ...;
QState *s2 = ...;
// If in s1 and the button receives an Enter event, transition to s2
QEventTransition *enterTransition = new QEventTransition(button, QEvent::Enter);
enterTransition->setTargetState(s2);
s1->addTransition(enterTransition);
// If in s2 and the button receives an Exit event, transition back to s1
QEventTransition *leaveTransition = new QEventTransition(button, QEvent::Leave);
leaveTransition->setTargetState(s1);
s2->addTransition(leaveTransition);
Subclassing露
When reimplementing the eventTest() function, you should first call the base implementation to verify that the event is a WrappedEvent for the proper object and event type. You may then cast the event to a WrappedEvent and get the original event by calling event(), and perform additional checks on that object.
See also
Methods露
- __init__(sourceState: QState = None)
Constructs a new QEventTransition object with the given sourceState.
- __init__(QObject, Type, sourceState: QState = None)
Constructs a new QEventTransition object associated with events of the given type for the given object, and with the given sourceState.
- event(QEvent) → bool
TODO
- eventSource() → QObject
Returns the event source associated with this event transition.
See also
- eventTest(QEvent) → bool
TODO
- eventType() → Type
Returns the event type that this event transition is associated with.
See also
- onTransition(QEvent)
TODO
- setEventSource(QObject)
Sets the event source associated with this event transition to be the given object.
See also
- setEventType(Type)
Sets the event type that this event transition is associated with.
See also
