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## sim.portrayal
Interface Fixed2D

    public interface Fixed2D

A Fixed2D object has control over how it is moved by a MovablePortrayal2D object.

Objects which implement this interface can force MovablePortrayal2D to NOT move them whenever they wish, or can interrupt the moving to move themselves as they like.

Objects which do not implement this interface have no say: MovablePortrayal2D will go directly to their fields and ask the fields to move them about.

Method Summary
`boolean` | `maySetLocation(java.lang.Object field, java.lang.Object location)` Returns true if the object permits you to change its location in the field.

Method Detail

### maySetLocation

    boolean maySetLocation(java.lang.Object field,
                           java.lang.Object location)

  Returns true if the object permits you to change its location in the field. Else returns false. This can be used in one of two common ways. First, the object may wish to simply deny you the ability to move it at certain times. Second, the object may wish to move ITSELF rather than have the field move it. In the second case, the object could, during canSetLocation(...), move itself in the field, then return FALSE, denying you the ability to ask the field to move the object again.

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