/*
* Copyright (c) 2003-onwards Shaven Puppy Ltd
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name of 'Shaven Puppy' nor the names of its contributors
* 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
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package net.puppygames.applet;
/**
* $Id: Tickable.java,v 1.1 2009/07/01 15:38:53 foo Exp $
* A thing which is ticked every frame by a Screen.
* <p>
* @author $Author: foo $
* @version $Revision: 1.1 $
*/
public interface Tickable {
/**
* Tick this thing.
*/
void tick();
/**
* Update this thing's appearance (stage 2 tick). This is called on all Tickables generally after they have all ticked().
*/
void update();
/**
* Remove this thing. After this call, {@link #isActive()} should return <code>false</code>. If {@link #isActive()} already
* returns <code>false</code> then this method should do nothing.
*/
void remove();
/**
* Is this thing still active?
* @return boolean
*/
boolean isActive();
/**
* Called when this Tickable is added to the specified {@link Screen}
* @param screen The screen to which the tickable was added
*/
void spawn(Screen screen);
}