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/*
* Copyright 2006 Phidgets Inc. All rights reserved.
*/
package com.phidgets.event;
import com.phidgets.Phidget;
/**
* This class represents the data for a EncoderPositionChangeEvent.
*
* @author Phidgets Inc.
*/
public class EncoderPositionChangeEvent
{
Phidget source;
int index;
int value;
int time;
/**
* Class constructor. This is called internally by the phidget library when creating this event.
*
* @param source the Phidget object from which this event originated
*/
public EncoderPositionChangeEvent(Phidget source, int index, int time, int value) {
this.source = source;
this.index = index;
this.value = value;
this.time = time;
}
/**
* Returns the source Phidget of this event. This is a reference to the Phidget object from which this
* event was called. This object can be cast into a specific type of Phidget object to call specific
* device calls on it.
*
* @return the event caller
*/
public Phidget getSource() {
return source;
}
/**
* Returns the index of the encoder.
*
* @return the index of the encoder
*/
public int getIndex() {
return index;
}
/**
* Returns the position change of the encoder. This is the amount of change in the encoder's position
* since the last {@link #EncoderPositionChangeEvent}.
*
* @return the change in position of the encoder
*/
public int getValue() {
return value;
}
/**
* Returns the timestamp of this position change. This is the time since the last {@link #EncoderPositionChangeEvent}.
* This time is not represented in a real quantitly such as seconds, but can be used as a qualitative quantity.
*
* @return the timestamp of this change event
*/
public int getTime()
{
return time;
}
/**
* Returns a string containing information about the event.
*
* @return an informative event string
*/
public String toString() {
return source.toString() + " encoder position " + index + " changed by "
+ value + " Time: " + time;
}
}
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