The Java version of Ecplise has a very powerful set of integrated tools to help writing, and maintaining code. Currently Code::Blocks has nothing comparable with that, still it has a C++ Code Completion plug-in that works (even if it has some problems and features to add).
You can browse the forums and you'll find a lot of information on the current weaknesses of the CC, as well as the redesign project. If you want you can try to add that feature (it would be really nice), but I would not expect it to be implemented soon.
Regards, XayC