[SOLVED] Queueing of global event if Qt 5 event loop is paused

Queueing of global event if Qt 5 event loop is paused

On some mobile systems the Qt main loop is paused when the app gets in background (it might also be terminated but this is not part of this question).

What happens if a background service, sensor, etc. posts to the event queue when it is inactive? The posting event looks like this:

QCoreApplication::postEvent(QCoreApplication::instance(), event);

Is the event cached and is there a limited number of cached events (except memory)?

Regards,

Solution

The events should be queued correctly when the main thread is paused. From source code of postEvent:

Adds the event \a event, with the object \a receiver as the
receiver of the event, to an event queue and returns immediately.

When control returns to the main event loop, all events that are
stored in the queue will be sent using the notify() function.