QAbstractTransition 類

QAbstractTransition 類是過渡基類介於 QAbstractState 對象。 更多...

頭：	#include <QAbstractTransition>
qmake:	QT += core
Since:	Qt 4.6
繼承：	QObject
繼承者：	QEventTransition and QSignalTransition

該類在 Qt 4.6 引入。

• 所有成員列錶，包括繼承成員

公共類型

enum	TransitionType { ExternalTransition, InternalTransition }

特性

• sourceState : QState* const
• targetState : QAbstractState*
• targetStates : QList<QAbstractState*>
• transitionType : TransitionType

公共函數

	QAbstractTransition (QState * sourceState = nullptr)
virtual	~QAbstractTransition ()
void	addAnimation (QAbstractAnimation * animation )
QList<QAbstractAnimation *>	animations () const
QStateMachine *	machine () const
void	removeAnimation (QAbstractAnimation * animation )
void	setTargetState (QAbstractState * target )
void	setTargetStates (const QList<QAbstractState *> & 目標 )
void	setTransitionType (QAbstractTransition::TransitionType type )
QState *	sourceState () const
QAbstractState *	targetState () const
QList<QAbstractState *>	targetStates () const
QAbstractTransition::TransitionType	transitionType () const

信號

void	targetStateChanged ()
void	targetStatesChanged ()
void	triggered ()

保護函數

virtual bool	eventTest (QEvent * event ) = 0
virtual void	onTransition (QEvent * event ) = 0

重實現保護函數

virtual bool

event (QEvent * e ) override

詳細描述

QAbstractTransition 類是過渡抽象基類介於狀態 ( QAbstractState 對象) 的 QStateMachine 。QAbstractTransition 屬於 狀態機框架 .

The sourceState () 函數返迴過渡源。 targetStates () 函數返迴過渡目標。 machine () 函數返迴過渡所屬的狀態機。

The triggered () 信號發射當過渡被觸發時。

過渡可以導緻動畫播放。使用 addAnimation () 函數以將動畫添加到過渡。

子類化

The eventTest () function is called by the state machine to determine whether an event should trigger the transition. In your reimplementation you typically check the event type and cast the event object to the proper type, and check that one or more properties of the event meet your criteria.

The onTransition () function is called when the transition is triggered; reimplement this function to perform custom processing for the transition.

成員類型文檔編製

enum QAbstractTransition:: TransitionType

This enum specifies the kind of transition. By default, the type is an external transition.

常量	值	描述
QAbstractTransition::ExternalTransition	0	Any state that is the source state of a transition (which is not a target-less transition) is left, and re-entered when necessary.
QAbstractTransition::InternalTransition	1	If the target state of a transition is a sub-state of a compound state, and that compound state is the source state, an internal transition will not leave the source state.

另請參閱 QAbstractTransition::transitionType .

特性文檔編製

sourceState : QState * const

This property holds the source state (parent) of this transition

訪問函數：

QState *

sourceState () const

targetState : QAbstractState *

此特性保持此過渡的目標狀態

If a transition has no target state, the transition may still be triggered, but this will not cause the state machine's configuration to change (i.e. the current state will not be exited and re-entered).

訪問函數：

QAbstractState *	targetState () const
void	setTargetState (QAbstractState * target )

通知程序信號：

void

targetStateChanged ()

[見下文注意事項]

注意： 這是私有信號。它可以用於信號連接，但不能由用戶發射。

targetStates : QList < QAbstractState *>

This property holds the target states of this transition

If multiple states are specified, all must be descendants of the same parallel group state.

訪問函數：

QList<QAbstractState *>	targetStates () const
void	setTargetStates (const QList<QAbstractState *> & 目標 )

通知程序信號：

void

targetStatesChanged ()

[見下文注意事項]

注意： 這是私有信號。它可以用於信號連接，但不能由用戶發射。

transitionType : TransitionType

indicates whether this transition is an internal transition, or an external transition.

Internal and external transitions behave the same, except for the case of a transition whose source state is a compound state and whose target(s) is a descendant of the source. In such a case, an internal transition will not exit and re-enter its source state, while an external one will.

By default, the type is an external transition.

訪問函數：

QAbstractTransition::TransitionType	transitionType () const
void	setTransitionType (QAbstractTransition::TransitionType type )

成員函數文檔編製

QAbstractTransition:: QAbstractTransition ( QState * sourceState = nullptr)

Constructs a new QAbstractTransition object with the given sourceState .

[signal] void QAbstractTransition:: targetStateChanged ()

此信號發射，當 targetState 特性改變。

注意： 這是私有信號。它可以用於信號連接，但不能由用戶發射。

注意： 通知程序信號對於特性 targetState .

該函數在 Qt 5.4 引入。

另請參閱 QAbstractTransition::targetState .

[signal] void QAbstractTransition:: targetStatesChanged ()

此信號發射，當 targetStates 特性改變。

注意： 這是私有信號。它可以用於信號連接，但不能由用戶發射。

注意： 通知程序信號對於特性 targetStates .

該函數在 Qt 5.4 引入。

另請參閱 QAbstractTransition::targetStates .

[signal] void QAbstractTransition:: triggered ()

This signal is emitted when the transition has been triggered (after onTransition () has been called).

注意： 這是私有信號。它可以用於信號連接，但不能由用戶發射。

[虛擬] QAbstractTransition:: ~QAbstractTransition ()

Destroys this transition.

void QAbstractTransition:: addAnimation ( QAbstractAnimation * animation )

添加給定 animation to this transition. The transition does not take ownership of the animation.

另請參閱 removeAnimation () 和 animations ().

QList < QAbstractAnimation *> QAbstractTransition:: animations () const

Returns the list of animations associated with this transition, or an empty list if it has no animations.

另請參閱 addAnimation ().

[override virtual protected] bool QAbstractTransition:: event ( QEvent * e )

重實現： QObject::event (QEvent *e).

[pure virtual protected] bool QAbstractTransition:: eventTest ( QEvent * event )

This function is called to determine whether the given event should cause this transition to trigger. Reimplement this function and return true if the event should trigger the transition, otherwise return false.

QStateMachine *QAbstractTransition:: machine () const

Returns the state machine that this transition is part of, or nullptr if the transition is not part of a state machine.

[pure virtual protected] void QAbstractTransition:: onTransition ( QEvent * event )

This function is called when the transition is triggered. The given event is what caused the transition to trigger. Reimplement this function to perform custom processing when the transition is triggered.

void QAbstractTransition:: removeAnimation ( QAbstractAnimation * animation )

移除給定 animation from this transition.

另請參閱 addAnimation ().

void QAbstractTransition:: setTargetState ( QAbstractState * target )

設置 target state of this transition.

注意： setter 函數對於特性 targetState .

另請參閱 targetState ().

void QAbstractTransition:: setTargetStates (const QList < QAbstractState *> & 目標 )

Sets the target states of this transition to be the given 目標 .

注意： setter 函數對於特性 targetStates .

另請參閱 targetStates ().

void QAbstractTransition:: setTransitionType ( QAbstractTransition::TransitionType type )

Sets the type of the transition to type .

注意： setter 函數對於特性 transitionType .

另請參閱 transitionType ().

QState *QAbstractTransition:: sourceState () const

Returns the source state of this transition, or nullptr if this transition has no source state.

注意： Getter function for property sourceState.

QAbstractState *QAbstractTransition:: targetState () const

Returns the target state of this transition, or nullptr if the transition has no target.

注意： Getter function for property targetState.

另請參閱 setTargetState ().

QList < QAbstractState *> QAbstractTransition:: targetStates () const

Returns the target states of this transition, or an empty list if this transition has no target states.

注意： Getter function for property targetStates.

另請參閱 setTargetStates ().

QAbstractTransition::TransitionType QAbstractTransition:: transitionType () const

Returns the type of the transition.

注意： Getter function for property transitionType.

另請參閱 setTransitionType ().

內容

1. 公共類型

2. 特性

3. 公共函數

4. 信號

5. 保護函數

6. 重實現保護函數

7. 詳細描述

8. 子類化