@Override
public void itemClicked(VisualItem item, MouseEvent e) {
Visualization vis = item.getVisualization();
DDGDisplay d = (DDGDisplay) vis.getDisplay(0);
// revalidates the display by finding the item with the same position as
// the mouse pointer
if (revalidated) {
String state = collapseExpand(item);
if (state.equals(START)) {
updateFocusGroup(stepId, item.getVisualization());
vis.run("color");
vis.run("repaint");
}
if (state.equals(STEP)) {
expandOneLevel(item);
updateFocusGroup(startId, item.getVisualization());
vis.run("color");
vis.run("repaint");
}
revalidated = false;
} else {
revalidated = true;
VisualItem myItem = d.findItem(e.getPoint());
itemClicked(myItem, e);
}
}
