QSignalTransition¶
The
QSignalTransition
class provides a transition based on a Qt signal. More…

New in version 4.6.
Synopsis¶
Functions¶
def
senderObject
()def
setSenderObject
(sender)def
setSignal
(signal)def
signal
()
Detailed Description¶
Typically you would use the overload of
addTransition()
that takes a sender and signal as arguments, rather than creatingQSignalTransition
objects directly.QSignalTransition
is part of The State Machine Framework .You can subclass
QSignalTransition
and reimplementeventTest()
to make a signal transition conditional; the event object passed toeventTest()
will be aSignalEvent
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);
-
class
QSignalTransition
(arg__1[, arg__2=None])¶ Constructs a new signal transition with the given
sourceState
.Constructs a new signal transition associated with the given
signal
of the givensender
, and with the givensourceState
.
-
PySide2.QtCore.QSignalTransition.
senderObject
()¶ - Return type
Returns the sender object associated with this signal transition.
See also
-
PySide2.QtCore.QSignalTransition.
setSenderObject
(sender)¶ - Parameters
sender –
QObject
Sets the
sender
object associated with this signal transition.See also
-
PySide2.QtCore.QSignalTransition.
setSignal
(signal)¶ - Parameters
signal –
QByteArray
Sets the
signal
associated with this signal transition.See also
-
PySide2.QtCore.QSignalTransition.
signal
()¶ - Return type
Returns the signal associated with this signal transition.
See also