how can I find out why a custom widget isn't showing up in the Qt Designer?

Question

I created a custom widget by following the instructions provided in Qt Creator's help. I followed everything exactly as they said there. My widget isn't showing up with the other widgets. I even tried their WorldTimeClock example. That doesn't show in the Qt Designer either.

How can I debug this?

Answer 1

If you go to Tools -> Form Editor -> About Qt Designer plugins, you will find a list of loaded qt plugins, and you will see an error message next to the ones that failed to load. I think that's the best you can get.