BEx Analyzer: Dropdown based on hiearchy

Hi

In BEx Analyzer 7 I need to add a design item which allows me to filter

- several data providers at once

- based on a hierarchicaldisplay of the filtering InfoObject

With the design items 'Navigation Pane' and 'List of Filters' hierarchies are supported but it only affects one data provider

With the design item 'Dropdown Box' hierarchies are not supporte but it could affect severeal data providers.

Does anyone know how to solve the problem?

This question has already been asked in 2011 at discussion http://scn.sap.com/thread/1845972 but it has not been answered.

Thanks for your response.

Christoph