NET/worlds/scape/PeriodicTimeSensor.java


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package NET.worlds.scape;

import NET.worlds.core.Std;
import java.io.IOException;

public class PeriodicTimeSensor extends Sensor implements FrameHandler {
   private float timeInterval = 1.0F;
   private long lastTrigger;
   private static Object classCookie = new Object();

   public PeriodicTimeSensor(Action act) {
      if (act != null) {
         this.addAction(act);
      }
   }

   public PeriodicTimeSensor() {
   }

   @Override
   public boolean handle(FrameEvent e) {
      long now = 0L;
      if (e == null) {
         now = Std.getFastTime();
      } else {
         now = e.time;
      }

      if (now - this.lastTrigger > (long)(1000.0F * this.timeInterval)) {
         this.lastTrigger = now;
         this.trigger(e);
      }

      return true;
   }

   @Override
   public Object properties(int index, int offset, int mode, Object value) throws NoSuchPropertyException {
      Object ret = null;
      switch (index - offset) {
         case 0:
            if (mode == 0) {
               ret = FloatPropertyEditor.make(new Property(this, index, "Time Interval (s)"));
            } else if (mode == 1) {
               ret = new Float(this.timeInterval);
            } else if (mode == 2) {
               this.timeInterval = (Float)value;
            }
            break;
         default:
            ret = super.properties(index, offset + 1, mode, value);
      }

      return ret;
   }

   @Override
   public void saveState(Saver s) throws IOException {
      s.saveVersion(1, classCookie);
      super.saveState(s);
      s.saveFloat(this.timeInterval);
   }

   @Override
   public void restoreState(Restorer r) throws IOException, TooNewException {
      switch (r.restoreVersion(classCookie)) {
         case 1:
            super.restoreState(r);
            this.timeInterval = r.restoreFloat();
            return;
         default:
            throw new TooNewException();
      }
   }

   @Override
   public String toString() {
      return "*every " + this.timeInterval + " s";
   }
}