gtk:file-filter-needed (filter)

filter -- a gtk:file-filter object

A gtk:file-filter-flags value with the flags indicating needed fields when calling the gtk:file-filter-filter function.

Gets the fields that need to be filled in for the structure passed to the gtk:file-filter-filter function. This function will not typically be used by applications. It is intended principally for use in the implementation of a gtk:file-chooser widget.