the size of the FileChooserDialog window

["Chris Dams" <chris dams nl gmail com>]

Dear all,

I use a FileChooserDialog in my application but I do not understand
what determines its size. Sometimes the window is bigger than is
needed and at other times it is too small for good usability, for no
apparent reason. Calling the set_default_size() method from the
constructor of my class that derives from FileChooserDialog does not
help.

Any ideas? Thank you!
Chris