QStateMachine immediate transition from dummy state

Question

In order to set an object property depending on a transition I need two intermediate states that immediately transition further:

   A       initial state
 Ta Tb     different transitions
 Aa  Ab    (these are only used to set an objects property depending on transition)
 TB TB     both should immediately "transit"
   B       objects property used via entered()/exited() signals

(Alternatively, B probably could be duplicated to set each respective property directly.)

Could a state's entered() signal be used as its own transition source?

score 3 · Accepted Answer · edited Mar 19 '15 at 14:56

3

Simply add an unconditional transition to the state:

TB->addTransition(B);

This is idiomatic and also cheaper than using a QSignalTransition coupled to the entered() signal.

Ref: http://doc.qt.io/qt-5/statemachine-api.html#targetless-transitions

edited Mar 19 '15 at 14:56

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answered Oct 14 '13 at 19:48

Kuba hasn't forgotten Monica

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score 0 · Answer 2 · answered Oct 14 '13 at 15:28

0

Yes, the QState's entered() signal can be used as transition source.

answered Oct 14 '13 at 15:28

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QStateMachine immediate transition from dummy state

2 Answers2