How to catch event when program is in background?

[cheng]

How can we catch event when program run in background?

THanks,

[tobias.hunger]

This depends heavily on the IPC mechanisms used by the two applications and what you mean by "event".

[alexander]

Which events on which OS do you want to catch? From other programs or X events that are received from the X server or something else?
maybe enough reimplement next functions:

@bool QCoreApplication::winEventFilter ( MSG * msg, long * result ) [virtual]
bool QApplication::x11EventFilter ( XEvent * event ) [virtual]
bool QApplication::symbianEventFilter ( const QSymbianEvent * event ) [virtual]
bool QApplication::macEventFilter ( EventHandlerCallRef caller, EventRef event ) [virtual]@