A list control allows for a harmonized display of heterogeneous list element data by using at least two templates. The templates define the layout for the list element data. The templates consult an interface while calculating the layout. The interface provides information regarding the location of at least one gridline; the layout for the list element data is based on that location. The list control implements the interface, thus allowing heterogeneous templates to rely one interface providing on one gridline location. In order to take into account the requirements of each list element for gridline location, the interface requests information regarding a preliminary gridline location for each list element and bases the final gridline location on this information.