public void setField(Object field) {
   super.setField(field);
   ObjectGrid2D og = (ObjectGrid2D) field;
   grid = new DoubleGrid2D(og.getWidth(), og.getHeight());
   valueGridPortrayal.setField(grid);
 }
 public void setImmutableField(boolean immutableField) {
   super.setImmutableField(immutableField);
   valueGridPortrayal.setImmutableField(immutableField);
 }