Improve the auto completion of the method signature

While typing a method declaration and pressing Ctrl+Space the list of possible completions is shown as expected. After having completed a method's name however and needing to type the parameters a completer will not pop up while pressing Ctrl+Space. Instead, a small tip message without any opportunity to complete the method declaration or to switch between possible method's parameters using keyboard is displayed. Using the mouse it is only possible to switch between the method's declarations but not to choose any. It would be nice if it was solved similar to the way it is done in Eclipse. The solution present in eclipse allows choosing the correct methods and parameters at any time of typing.