/* Copyright 1996 Matthew Freedman and University of Washington
              mattf@cac.washington.edu

   This program may be freely used, modified, or redistributed for
   any non-commercial purpose as long as credit is given.

   This file contains the GenericController class.
 */
import java.awt.*;

/* Simple abstract class allows LineControllers and 
   ColorControllers to have an interfaceChanged() method, and handles
   some other common house-keeping
 */
abstract public class GenericController extends java.applet.Applet {
  boolean initted = false;
  NinaParams params = null; /*  created by parent program */

  abstract void interfaceChanged(Controller ctrl);

  public boolean preSetParams(NinaParams p) {
    boolean force;

    /* Save the parameters */
    if (params == null) {
      /* Very first time called, initialize params */
      params = p;
      force = true;
    }
    else if (p == null)
      /* Called from init(), don't check against params */
      force = true;

    else {
      /* Called from outside, check p values against params */
      params = p;
      force = false;
    }
    return(force);
  }
}