public void onDragEnd(DragEndEvent event) {
List<Widget> widgetList = Lists.newArrayList();
for (int index = 0; index < verticalPanel.getWidgetCount(); index++) {
widgetList.add(verticalPanel.getWidget(index));
}
fireEvent(new WidgetsReorderedEvent(widgetList));
}
@Override
public void onDragStart(DragStartEvent event) {}
@Override