WeightSensorPhidget.java

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/*
 * Copyright 2006 Phidgets Inc.  All rights reserved.
 */

package com.phidgets;
import java.util.Iterator;
import java.util.LinkedList;
import com.phidgets.event.*;
public final class WeightSensorPhidget extends Phidget
{
        public WeightSensorPhidget () throws PhidgetException
        {
                super (create ());
        }
        private static native long create () throws PhidgetException;
        public native double getWeight () throws PhidgetException;
        public native void setWeightChangeTrigger (double newVal) throws PhidgetException;
        public native double getWeightChangeTrigger () throws PhidgetException;

        private final void enableDeviceSpecificEvents (boolean b)
        {
                enableWeightChangeEvents (b && weightChangeListeners.size () > 0);
        }
        public final void addWeightChangeListener (WeightChangeListener l)
        {
                synchronized (weightChangeListeners)
                {
                        weightChangeListeners.add (l);
                        enableWeightChangeEvents (true);
        }} private LinkedList weightChangeListeners = new LinkedList ();
        private long nativeWeightChangeHandler = 0;
        public final void removeWeightChangeListener (WeightChangeListener l)
        {
                synchronized (weightChangeListeners)
                {
                        weightChangeListeners.remove (l);
                        enableWeightChangeEvents (weightChangeListeners.size () > 0);
        }} private void fireWeightChange (WeightChangeEvent e)
        {
                synchronized (weightChangeListeners)
                {
                        for (Iterator it = weightChangeListeners.iterator (); it.hasNext ();)
                                ((WeightChangeListener) it.next ()).weightChanged (e);
                }
        }
        private native void enableWeightChangeEvents (boolean b);
}