內容

特性
公共函數
重實現保護函數
詳細描述

QSignalTransition 類

The QSignalTransition 類提供基於 Qt 信號的過渡。更多...

頭：	#include <QSignalTransition>
Since:	Qt 4.6
繼承：	QAbstractTransition

所有成員列錶，包括繼承成員

特性

senderObject : QObject *
signal : QByteArray

3 特性繼承自 QAbstractTransition
1 特性繼承自 QObject

公共函數

	QSignalTransition (QState * sourceState = 0)
	QSignalTransition (QObject * sender , const char * signal , QState * sourceState = 0)
	~QSignalTransition ()
QObject *	senderObject () const
void	setSenderObject (QObject * sender )
void	setSignal (const QByteArray & signal )
QByteArray	signal () const

9 公共函數繼承自 QAbstractTransition
29 公共函數繼承自 QObject

重實現保護函數

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

3 保護函數繼承自 QAbstractTransition
8 保護函數繼承自 QObject

額外繼承成員

1 公共槽繼承自 QObject
1 信號繼承自 QAbstractTransition
1 信號繼承自 QObject
7 靜態公共成員繼承自 QObject
3 保護函數繼承自 QAbstractTransition
8 保護函數繼承自 QObject

詳細描述

The QSignalTransition 類提供基於 Qt 信號的過渡。

通常，將使用重載 QState::addTransition () 接受發送器和信號作為自變量，而不是創建 QSignalTransition 對象直接。 QSignalTransition 屬於狀態機框架 .

可以子類化 QSignalTransition 並重實現 eventTest () to make a signal transition conditional; the event object passed to eventTest () 將是 QStateMachine::SignalEvent object. Example:

class CheckedTransition : public QSignalTransition
{
public:
    CheckedTransition(QCheckBox *check)
        : QSignalTransition(check, SIGNAL(stateChanged(int))) {}
protected:
    bool eventTest(QEvent *e) {
        if (!QSignalTransition::eventTest(e))
            return false;
        QStateMachine::SignalEvent *se = static_cast<QStateMachine::SignalEvent*>(e);
        return (se->arguments().at(0).toInt() == Qt::Checked);
    }
};
...
QCheckBox *check = new QCheckBox();
check->setTristate(true);
QState *s1 = new QState();
QState *s2 = new QState();
CheckedTransition *t1 = new CheckedTransition(check);
t1->setTargetState(s2);
s1->addTransition(t1);

特性文檔編製

senderObject : QObject *

This property holds the sender object that this signal transition is associated with.

訪問函數：

QObject *	senderObject () const
void	setSenderObject (QObject * sender )

signal : QByteArray

This property holds the signal that this signal transition is associated with.

訪問函數：

QByteArray	signal () const
void	setSignal (const QByteArray & signal )

成員函數文檔編製

QSignalTransition:: QSignalTransition ( QState * sourceState = 0)

構造新的信號過渡采用給定 sourceState .

QSignalTransition:: QSignalTransition ( QObject * sender , const char * signal , QState * sourceState = 0)

Constructs a new signal transition associated with the given signal 為給定 sender ，和采用給定 sourceState .

QSignalTransition:: ~QSignalTransition ()

銷毀此信號過渡。

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

重實現自 QObject::event ().

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

重實現自 QAbstractTransition::eventTest ().

The default implementation returns true if the event 是 QStateMachine::SignalEvent object and the event's sender and signal index match this transition, and returns false otherwise.

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

重實現自 QAbstractTransition::onTransition ().

內容