How to trace events? Topic is solved

[cecilio]

Is there a simple way or a tool to trace the loop of events? I would like to investigate the sequence of events that creates a problem in my app.

Thanks.

[DavidHart]

Hi,

Is there a simple way or a tool to trace the loop of events?

Yes and no.

The simple way is to override wxApp::FilterEvent and examine each event as it passes through. A couple of years ago I did start to write a tool that did this.

The bad news is, it was seldom useful. It helped when it was important to know that event A was being fired before event B; but that information is not often what's needed. It's commoner to want to watch an event being passed up the chain of eventhandlers to see where it dies. That would require overriding (or replacing) some part of the event loop itself; and even then, it's difficult to identify each control from just its memory address.

So I gave up. Perhaps a better approach would be to do clever things with a debugger, though that wouldn't solve the identity problem...

Regards,

David

[cecilio]

Thank you David,

In my case I would like to investigate a couple of issues related to the same window. So I will try to handle all events in a single handler and invoke the real handlers from there, after logging the event.

Thanks for your help. Regards,
Cecilio