QEventTransition

The QEventTransition class provides a QObject -specific transition for Qt events. More…

Inherited by: QKeyEventTransition, QMouseEventTransition

New in version 4.6.

Synopsis

Functions

• def eventSource ()

• def eventType ()

• def setEventSource (object)

• def setEventType (type)

Detailed Description

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

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

addTransition()

class PySide2.QtCore.QEventTransition(object, type[, sourceState=None])

PySide2.QtCore.QEventTransition([sourceState=None])

param type:

Type

param sourceState:

PySide2.QtCore.QState

param object:

PySide2.QtCore.QObject

Constructs a new QEventTransition object associated with events of the given type for the given object , and with the given sourceState .

Constructs a new QEventTransition object with the given sourceState .

PySide2.QtCore.QEventTransition.eventSource()

Return type:

PySide2.QtCore.QObject

This property holds the event source that this event transition is associated with.

PySide2.QtCore.QEventTransition.eventType()

Return type:

Type

This property holds the type of event that this event transition is associated with.

PySide2.QtCore.QEventTransition.setEventSource(object)

Parameters:

object – PySide2.QtCore.QObject

This property holds the event source that this event transition is associated with.

PySide2.QtCore.QEventTransition.setEventType(type)

Parameters:

type – Type

This property holds the type of event that this event transition is associated with.