內容

• 特性
• 公共函數
• 信號
• 保護函數
• 重實現保護函數
• 詳細描述
• 子類化

QAbstractState 類

The QAbstractState class is the base class of states of a QStateMachine . 更多...

頭：	#include <QAbstractState>
qmake:	QT += core
Since:	Qt 4.6
繼承：	QObject
繼承者：	QFinalState , QHistoryState ，和 QState

• 所有成員列錶，包括繼承成員

特性

• active : const bool

• 1 特性繼承自 QObject

公共函數

	~QAbstractState ()
bool	active () const
QStateMachine *	machine () const
QState *	parentState () const

• 32 公共函數繼承自 QObject

信號

void	activeChanged (bool active )
void	entered ()
void	exited ()

• 2 信號繼承自 QObject

保護函數

	QAbstractState (QState * parent = Q_NULLPTR)
virtual void	onEntry (QEvent * event ) = 0
virtual void	onExit (QEvent * event ) = 0

重實現保護函數

virtual bool

event (QEvent * e )

• 9 保護函數繼承自 QObject

額外繼承成員

• 1 公共槽繼承自 QObject
• 11 靜態公共成員繼承自 QObject

詳細描述

The QAbstractState class is the base class of states of a QStateMachine .

The QAbstractState class is the abstract base class of states that are part of a QStateMachine . It defines the interface that all state objects have in common. QAbstractState 屬於 狀態機框架 .

The entered () signal is emitted when the state has been entered. The exited () signal is emitted when the state has been exited.

The parentState () function returns the state's parent state. The machine () function returns the state machine that the state is part of.

子類化

The onEntry () function is called when the state is entered; reimplement this function to perform custom processing when the state is entered.

The onExit () function is called when the state is exited; reimplement this function to perform custom processing when the state is exited.

特性文檔編製

active : const bool

This property holds the active property of this state. A state is active between entered () 和 exited () 信號。

該特性在 Qt 5.4 引入。

訪問函數：

bool	active () const

通知程序信號：

void	activeChanged (bool active )

成員函數文檔編製

[protected] QAbstractState:: QAbstractState ( QState * parent = Q_NULLPTR)

構造新的狀態采用給定 parent 狀態。

QAbstractState:: ~QAbstractState ()

銷毀此狀態。

bool QAbstractState:: active () const

Returns whether this state is active.

注意： getter 函數對於特性 active .

另請參閱 activeChanged (bool), entered ()，和 exited ().

[signal] void QAbstractState:: activeChanged ( bool active )

This signal is emitted when the active property is changed with active 作為自變量。

該函數在 Qt 5.4 引入。

注意： 通知程序信號對於特性 active .

另請參閱 QAbstractState::active , entered ()，和 exited ().

[signal] void QAbstractState:: entered ()

This signal is emitted when the state has been entered (after onEntry () 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。

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

重實現自 QObject::event ().

[signal] void QAbstractState:: exited ()

This signal is emitted when the state has been exited (after onExit () 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。

QStateMachine *QAbstractState:: machine () const

Returns the state machine that this state is part of, or 0 if the state is not part of a state machine.

[pure virtual protected] void QAbstractState:: onEntry ( QEvent * event )

This function is called when the state is entered. The given event is what caused the state to be entered. Reimplement this function to perform custom processing when the state is entered.

[pure virtual protected] void QAbstractState:: onExit ( QEvent * event )

This function is called when the state is exited. The given event is what caused the state to be exited. Reimplement this function to perform custom processing when the state is exited.

QState *QAbstractState:: parentState () const

Returns this state's parent state, or 0 if the state has no parent state.