Imported Upstream version 2.1.8.20120216upstream/2.1.8.20120216

1 files changed, 116 insertions, 0 deletions

diff --git a/Java/com/phidgets/AccelerometerPhidget.java b/Java/com/phidgets/AccelerometerPhidget.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 Accelerometer. All methods to read
+ * acceleration data from an Accelerometer are implemented in this class.
+ <p>
+ The Phidget Accelerometer provides 2 or 3 axes of acceleration data, at anywhere from 2g to 10g
+ sensitivity, depending on the specific revision. See your hardware documetation for more information.
+ They can measure both static (gravity) and dynamic acceleration.
+ 
+ * @author Phidgets Inc.
+ */
+public final class AccelerometerPhidget extends Phidget
+{
+	public AccelerometerPhidget () throws PhidgetException
+	{
+		super (create ());
+	}
+	private static native long create () throws PhidgetException;
+
+	/**
+	 * Returns the number of accelerometer axes. Currently all accelerometers provide two or three axes of acceleration - x, y, (and z).
+	 * @return number of axes of acceleration
+	 */
+	public native int getAxisCount () throws PhidgetException;
+	/**
+	 * Returns the acceleration of a particular axis. This value is returned in g's, where one g of acceleration is
+	 * equal to gravity. This means that at a standstill each axis will measure between -1.0 and 1.0 g's depending on 
+	 * orientation.
+	 * <P>
+	 * This value will always be between {@link #getAccelerationMin getAccelerationMin} and {@link #getAccelerationMax getAccelerationMax}.
+	 * <p>
+	 * Index 0 is the x-axis, 1 is the y-axis, and 2 is the z-axis (where available).
+	 * 
+	 * @param index index of the axis
+	 * @return acceleration of the selected axis
+	 * @throws PhidgetException If this Phidget is not opened and attached, or if the index is out of range. 
+	 * See {@link com.phidgets.Phidget#open(int) open} for information on determining if a device is attached.
+	 */
+	public native double getAcceleration (int index) throws PhidgetException;
+	/**
+	 * Returns the maximum acceleration value that this axis will report. This will be set to just higher then the maximum
+	 * acceleration that this axis can measure. If the acceleration is equal to this maximum, assume that that axis is saturated
+	 * beyond what it can measure.
+	 * @return maximum acceleration
+	 */
+	public native double getAccelerationMax (int index) throws PhidgetException;
+	/**
+	 * Returns the minimum acceleration value that this axis will report. This will be set to just lower then the minimum
+	 * acceleration that this axis can measure. If the acceleration is equal to this minimum, assume that that axis is saturated
+	 * beyond what it can measure.
+	 * @return minimum acceleration
+	 */
+	public native double getAccelerationMin (int index) throws PhidgetException;
+	/**
+	 * Sets the change trigger for an Axis. This value is in g's and is by default set to 0.
+	 * This is the difference in acceleration that must appear between succesive calls to the
+	 * OnAccelerationChange event handler.
+	 * @param index index of the axis
+	 * @param newVal the new change trigger for this axis
+	 * @throws PhidgetException If this Phidget is not opened and attached, or if the index is out of range. 
+	 * See {@link com.phidgets.Phidget#open(int) open} for information on determining if a device is attached.
+	 */
+	public native void setAccelerationChangeTrigger (int index, double newVal) throws PhidgetException;
+	/**
+	 * Returns the change trigger for an Axis. This value is in g's and is by default set to 0.
+	 * @param index index of the axis
+	 * @return change trigger of the selected axis
+	 * @throws PhidgetException If this Phidget is not opened and attached, or if the index is out of range. 
+	 * See {@link com.phidgets.Phidget#open(int) open} for information on determining if a device is attached.
+	 */
+	public native double getAccelerationChangeTrigger (int index) throws PhidgetException;
+
+	private final void enableDeviceSpecificEvents (boolean b)
+	{
+		enableAccelerationChangeEvents (b && accelerationChangeListeners.size () > 0);
+	}
+	/**
+	 * Adds an acceleration change listener. The acceleration change handler is a method that will be called when the acceleration 
+	 * of an axis has changed by at least the {@link #getAccelerationChangeTrigger(int) Trigger} that has been set for that axis.
+	 * <p>
+	 * There is no limit on the number of acceleration change handlers that can be registered for a particular Phidget.
+	 * 
+	 * @param l An implemetation of the {@link com.phidgets.event.AccelerationChangeListener AccelerationChangeListener} interface
+	 */
+	public final void addAccelerationChangeListener (AccelerationChangeListener l)
+	{
+		synchronized (accelerationChangeListeners)
+		{
+			accelerationChangeListeners.add (l);
+			enableAccelerationChangeEvents (true);
+	}} private LinkedList accelerationChangeListeners = new LinkedList ();
+	private long nativeAccelerationChangeHandler = 0;
+	public final void removeAccelerationChangeListener (AccelerationChangeListener l)
+	{
+		synchronized (accelerationChangeListeners)
+		{
+			accelerationChangeListeners.remove (l);
+			enableAccelerationChangeEvents (accelerationChangeListeners.size () > 0);
+	}} private void fireAccelerationChange (AccelerationChangeEvent e)
+	{
+		synchronized (accelerationChangeListeners)
+		{
+			for (Iterator it = accelerationChangeListeners.iterator (); it.hasNext ();)
+				((AccelerationChangeListener) it.next ()).accelerationChanged (e);
+		}
+	}
+	private native void enableAccelerationChangeEvents (boolean b);
+}