The documentation for gtk_file_chooser_get_filenames() states that the
returned filenames are absolute paths, and uses g_file_get_path() to
construct the filename. The same function is used to construct the
filename in gtk_file_chooser_get_filename(), so it should also return
absolute paths.
https://bugzilla.gnome.org/show_bug.cgi?id=371034
* @chooser: a #GtkFileChooser
*
* Gets the filename for the currently selected file in
- * the file selector. If multiple files are selected,
- * one of the filenames will be returned at random.
+ * the file selector. The filename is returned as an absolute path. If
+ * multiple files are selected, one of the filenames will be returned at
+ * random.
*
* If the file chooser is in folder mode, this function returns the selected
* folder.