@Override
public void reveal(Object element) {
Assert.isNotNull(element);
int index = getElementIndex(element);
if (index == -1) {
return;
}
// algorithm patterned after List.showSelection()
int count = list.getItemCount();
if (count == 0) {
return;
}
int height = list.getItemHeight();
Rectangle rect = list.getClientArea();
int topIndex = list.getTopIndex();
int visibleCount = Math.max(rect.height / height, 1);
int bottomIndex = Math.min(topIndex + visibleCount, count) - 1;
if ((topIndex <= index) && (index <= bottomIndex)) {
return;
}
int newTop = Math.min(Math.max(index - (visibleCount / 2), 0), count - 1);
list.setTopIndex(newTop);
}
@Override
protected int listGetTopIndex() {
return list.getTopIndex();
}