eventFilter anywhere in the program.

[Oleg21]

I still don't understand what it is you want to do.
What is the goal you are after?

Okay, I want to record actions with the program (with the interface). And save this data in log file.

which events do you need form which objects?
If you want to filter the button events, you can install an event filter on the buttons.

I want to install global eventFilter, so that work with everyone object at once. I don't want to install unique eventFiletr for all objects in my app. Quantity and type of objects are unknown in advance.

Also, do you really need to fileter event by another object?

The idea itself is to put this code into a separate class and include it as needed (a utility class).

Are you aware you can process events in the objects themselves by overloading event() or specialized event handler?

Overloading event() - yes i know about it. But this will force me to overload the event() in all objects. It's complicated.

Therefore, in my opinion, the best option of all is to use:

qApp->installEventFilter(this);

qApp->installEventFilter(this);

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