QEventTransition

Qt 5.9.0 Reference Documentation

QEventTransition Class

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

头文件:	#include <QEventTransition>
qmake:	QT += core
开始支持版本:	Qt 4.6
基类:	QAbstractTransition

所有的成员列表, 包括继承的成员

属性

eventSource : QObject *
eventType : QEvent::Type

4 个属性继承自 QAbstractTransition
1 个属性继承自 QObject

公有函数

	QEventTransition(QState *sourceState = Q_NULLPTR)
	QEventTransition(QObject *object, QEvent::Type type, QState *sourceState = Q_NULLPTR)
	~QEventTransition()
QObject *	eventSource() const
QEvent::Type	eventType() const
void	setEventSource(QObject *object)
void	setEventType(QEvent::Type type)

11 个公有函数继承自 QAbstractTransition
32 个公有函数继承自 QObject

重新实现的受保护函数

virtual bool	event(QEvent *e)
virtual bool	eventTest(QEvent *event)
virtual void	onTransition(QEvent *event)

3 个受保护的函数继承自 QAbstractTransition
9 个受保护的函数继承自 QObject

其他继承的成员

1 个公有槽函数继承自 QObject
3 个信号继承自 QAbstractTransition
2 个信号继承自 QObject
11 个静态公有成员继承自 QObject
3 个受保护的函数继承自 QAbstractTransition
9 个受保护的函数继承自 QObject

详细描述

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

When reimplementing the eventTest() function, you should first call the base implementation to verify that the event is a QStateMachine::WrappedEvent for the proper object and event type. You may then cast the event to a QStateMachine::WrappedEvent and get the original event by calling QStateMachine::WrappedEvent::event(), and perform additional checks on that object.

参见 QState::addTransition().

属性

eventSource : QObject *

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

访问函数:

QObject *	eventSource() const
void	setEventSource(QObject *object)

eventType : QEvent::Type

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

访问函数:

QEvent::Type	eventType() const
void	setEventType(QEvent::Type type)

成员函数

QEventTransition::QEventTransition(QState **sourceState* = Q_NULLPTR)

Constructs a new QEventTransition object with the given sourceState.

QEventTransition::QEventTransition(QObject **object, QEvent::Type type*, QState **sourceState* = Q_NULLPTR)

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

QEventTransition::~QEventTransition()

Destroys this QObject event transition.

`[virtual protected]` bool QEventTransition::event(QEvent *e)

Reimplemented from QObject::event().

QObject *QEventTransition::eventSource() const

Returns the event source associated with this event transition.

Note: Getter function for property eventSource.

参见 setEventSource().

`[virtual protected]` bool QEventTransition::eventTest(QEvent **event*)

Reimplemented from QAbstractTransition::eventTest().

QEvent::Type QEventTransition::eventType() const

Returns the event type that this event transition is associated with.

Note: Getter function for property eventType.

参见 setEventType().

`[virtual protected]` void QEventTransition::onTransition(QEvent **event*)

Reimplemented from QAbstractTransition::onTransition().

void QEventTransition::setEventSource(QObject **object*)

Sets the event source associated with this event transition to be the given object.

Note: Setter function for property eventSource.

参见 eventSource().

void QEventTransition::setEventType(QEvent::Type type)

Sets the event type that this event transition is associated with.

Note: Setter function for property eventType.

参见 eventType().

目录