How to intercept ALL signals emitted by a given event in Qt?

qt debugging pyqt signals-slots
Piotr Byzia picture Piotr Byzia · Jan 15, 2010 · Viewed 7.8k times · Source

I can imagine that there might be quite a few of them depending on the event, but at the same time, I guess this can be a best way to debug, and an interesting lesson.

Why would I need it? I'm using some custom class based on the QWidget, which does not expand when I de-attach a QDockWidget based in the same window. Knowing what signals are emitted when this dock widget is being de-attached would help me to chose which method I need to overwrite in my custom class.

In other words, I don't want to check every possible signal from the documentation, but just see which signals are emitted when I perform some action in my application.

Answer

rohanpm picture rohanpm · Jan 15, 2010

This isn't possible with any public API.

But, if you put your code into a QTestLib-based unit test, you can run the unit test with -vs to print out every emitted signal.

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