Only files matching filter are selectable. Returns a null string if the user cancelled the dialog. This static function is less capable than the full QFileDialog object, but is convenient and easy to use. By default there is no icon provider and this function returns 0. Reimplemented from QWidget.
Re-reads the active directory in the file dialog.
It is seldom necessary to call this function. It is provided in case the directory contents change and you want to refresh the directory list box. Handles resize events for the file dialog. Reimplemented from QWidget. If a file name was selected, the returned string contains the absolute path name.