[Paraview-developers] Folder Selector in ParaView

[rclaveria]

Hello,

I'm writing a filter for ParaView. I need to enable the user to select a 
folder through the filter's menu, ideally using the module pqFileDialog. 
For files, the following lines on the xml file of the filter suffice, 
but with this piece of code only files are admitted (not directories). 
Is there a way to set a menu that admits only directories?

       <StringVectorProperty animateable="0"
                             command="SetOutputDir"
                             name="OutputDir"
                             number_of_elements="1"
                             panel_visibility="default">
       <FileListDomain name="files" />

Thanks