import vrml.*;
import vrml.node.*;
import vrml.field.*;

public class watch extends Script{
   // Define all the eventOuts and fields as class variables.
   private SFFloat oldFrac;
   private SFInt32 tick;
   private SFBool running;
   private SFRotation value_changed;

   private float jvalue_changed[];   // Declare any arrays

   // This method is called when the script is loaded
   public void initialize(){
      // Get handles to eventOuts and fields from the VRML environment
      oldFrac = (SFFloat) getField("oldFrac");
      tick = (SFInt32) getField("tick");
      running = (SFBool) getField("running");
      value_changed = (SFRotation) getEventOut("value_changed");
      jvalue_changed = new float[4];  // Initialize arrays
   }

   // Declare eventIn handlers as private methods
   private void set_fraction (float frac) {
      if (running.getValue() == true) {
	 if (frac < oldFrac.getValue()) {
	    int jtick = tick.getValue();
	    jtick = jtick + 1;
	    if (jtick > 299) jtick = 0;
	    jvalue_changed[3] = -jtick * 2.0f * 3.14159f/300.0f;
	    jvalue_changed[0] = 0.0f;
	    jvalue_changed[1] = 0.0f;
	    jvalue_changed[2] = 1.0f;
	    value_changed.setValue(jvalue_changed);
	    tick.setValue(jtick);
	 }
	 oldFrac.setValue(frac);
      }
   } 

   private void stop_start(boolean bval) {
      if (bval == true)
      running.setValue(!running.getValue());
   }

   private void reset(boolean bval) {
      if (bval == true) {
	 tick.setValue(0);
	 jvalue_changed[3] = 0.0f;
	 jvalue_changed[0] = 0.0f;
	 jvalue_changed[1] = 0.0f;
	 jvalue_changed[2] = 1.0f;
	 value_changed.setValue(jvalue_changed);
      }
   }
 
   // In Java, you have to explicitly handle each event using the
   // processEvent method. Use it to call a private method for each event. 
   public void processEvent (Event e) {
      String EventName = e.getName();
      
      if (EventName.equals("set_fraction"))
         set_fraction(((ConstSFFloat)e.getValue()).getValue()); 

      else if (EventName.equals("stop_start"))
         stop_start(((ConstSFBool)e.getValue()).getValue());

      else if (EventName.equals("reset"))
         reset(((ConstSFBool)e.getValue()).getValue());
   }
}