Imported Upstream version 2.1.8.20120216upstream/2.1.8.20120216

1 files changed, 89 insertions, 0 deletions

diff --git a/Java/com/phidgets/WeightSensorPhidget.java b/Java/com/phidgets/WeightSensorPhidget.java
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+++ b/Java/com/phidgets/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.*;
+/**
+ * This class represents a Phidget Weight Sensor. All methods
+ * to read weight data from the weight sensor are implemented in this class.
+ * <p>
+ * The Phidget Weight Sensor is simply an electronic scale with a USB interface.
+ * It provides one weight value, in kg.
+ *
+ * @author Phidget Inc.
+ */
+public final class WeightSensorPhidget extends Phidget
+{
+	public WeightSensorPhidget () throws PhidgetException
+	{
+		super (create ());
+	}
+	private static native long create () throws PhidgetException;
+	/**
+	 * Returns the sensed weight in kg. This weight is in kg (kilograms), but can
+	 * easily be converted into other units. The accuracy, sesitivity and range depends on the scale and version.
+	 *
+	 * @return The sensed weight
+	 * @throws PhidgetException If this Phidget is not opened and attached. 
+	 * See {@link com.phidgets.Phidget#open(int) open} for information on determining if a device is attached.
+	 */
+	public native double getWeight () throws PhidgetException;
+	/**
+	 * Sets the weight change trigger. This is the ammount by which the sensed weight must
+	 * change between WeightChangeEvents. By default this is set to 5.
+	 *
+	 * @param newVal The new trigger value
+	 * @throws PhidgetException If this Phidget is not opened and attached. 
+	 * See {@link com.phidgets.Phidget#open(int) open} for information on determining if a device is attached.
+	 */
+	public native void setWeightChangeTrigger (double newVal) throws PhidgetException;
+	/**
+	 * Returns the weight change trigger. This is the ammount by which the sensed weight must
+	 * change between WeightChangeEvents. By default this is set to 5.
+	 *
+	 * @return The trigger value
+	 * @throws PhidgetException If this Phidget is not opened and attached. 
+	 * See {@link com.phidgets.Phidget#open(int) open} for information on determining if a device is attached.
+	 */
+	public native double getWeightChangeTrigger () throws PhidgetException;
+
+	private final void enableDeviceSpecificEvents (boolean b)
+	{
+		enableWeightChangeEvents (b && weightChangeListeners.size () > 0);
+	}
+	/**
+	 * Adds a weight change listener. The weight change handler is a method that will be called when the weight 
+	 * has changed by at least the {@link #getWeightChangeTrigger() Trigger} that has been set.
+	 * <p>
+	 * There is no limit on the number of weight change handlers that can be registered for a particular Phidget.
+	 * 
+	 * @param l An implemetation of the {@link com.phidgets.event.WeightChangeListener WeightChangeListener} interface
+	 */
+	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);
+}