engine/src/core/com/jme3/input/Input.java

/*
 * Copyright (c) 2009-2010 jMonkeyEngine
 * All rights reserved.
 *
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 *
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 *
 * * Redistributions in binary form must reproduce the above copyright
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 *   may be used to endorse or promote products derived from this software
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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 */

package com.jme3.input;

/**
 * Abstract interface for an input device.
 * 
 * @see MouseInput
 * @see KeyInput
 * @see JoyInput
 */
public interface Input {

    /**
     * Initializes the native side to listen into events from the device.
     */
    public void initialize();

    /**
     * Queries the device for input. All events should be sent to the
     * RawInputListener set with setInputListener.
     *
     * @see #setInputListener(com.jme3.input.RawInputListener)
     */
    public void update();

    /**
     * Ceases listening to events from the device.
     */
    public void destroy();

    /**
     * @return True if the device has been initialized and not destroyed.
     * @see #initialize()
     * @see #destroy() 
     */
    public boolean isInitialized();

    /**
     * Sets the input listener to receive events from this device. The
     * appropriate events should be dispatched through the callbacks
     * in RawInputListener.
     * @param listener
     */
    public void setInputListener(RawInputListener listener);

    /**
     * @return The current absolute time as nanoseconds. This time is expected
     * to be relative to the time given in InputEvents time property.
     */
    public long getInputTimeNanos();
}