DataTrack track0 = (DataTrack) trackABox.getSelectedItem();
DataTrack track1 = (DataTrack) trackBBox.getSelectedItem();
CombinedDataSource.Operation op = (CombinedDataSource.Operation) operation.getSelectedItem();
String text = resultName.getText();
CombinedDataSource source = new CombinedDataSource(track0, track1, op);
DataSourceTrack newTrack = new DataSourceTrack(null, track0.getId() + track1.getId() + text, text, source);
TrackMenuUtils.changeRenderer(Arrays.<Track>asList(newTrack), track0.getRenderer().getClass());
newTrack.setDataRange(track0.getDataRange());
newTrack.setColorScale(track0.getColorScale());