@Override
public void undoAction(UndoableEvent event) {
TableLayoutFormItem item = (TableLayoutFormItem) event.getData("item");
Integer selectedX = (Integer) event.getData("selectedX");
int columnNumber = item.getColumnForXCoordinate(selectedX);
item.removeColumn(columnNumber);
}
@Override
public void onEvent(UndoableEvent event) { }
@Override
public void doAction(UndoableEvent event) {