Gets the #GFile that should be previewed in a custom preview Internal function, see gtk.file_chooser.FileChooser.getPreviewUri.
the #GFile for the file to preview, or null if no file is selected. Free with gobject.object.ObjectWrap.unref.
Gets the #GFile that should be previewed in a custom preview Internal function, see gtk.file_chooser.FileChooser.getPreviewUri.