*/
public void onPreviewDragEnd(DragEndEvent event)
throws VetoDragException {
Log.info("Drag End: " + event.getSource());
if (event.getSource() instanceof ProcessLabel) {
ProcessLabel lab = (ProcessLabel) event.getSource();
int x = event.getContext().mouseX;
Date date = timeline.getDateFromGUIX(x);
controller.addProcess(lab.getProcessType(), date);
}
throw new VetoDragException();
}