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When a signal is emitted, will all of the slots attached to it be executed before the emit returns? Or are the slots just scheduled to be executed whenever convenient?
Connections can be direct or queued. For direct connections, which is the default
when connecting objects in the same thread, all of the slots will be executed before the emit returns. Slots connected to signals through a queued connection will be executed when control returns to the event loop.
The order of execution of the slots is undefined.
2 comments
September 9, 2010
Ant Farmer
FIY
1 – http://doc.trolltech.com/4.6/qobject.html#connect [doc.trolltech.com]
2 – http://doc.trolltech.com/4.6/qt.html#ConnectionType-enum [doc.trolltech.com]
October 22, 2011
Robot Herder