fadeimageeffect.java

非常好的java collapse游戏代码

/*
 * JCollapse - Java Collapse Game
 * Copyright (C) 2005 Erico Gon鏰lves Rimoli
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package sourceforge.net.projects.jcollapse.game.effects;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.BufferedImage;

import javax.swing.ImageIcon;

/**
 * Fade image effect can be used in wait process like intro game screen
 * @author erico
 */
public class FadeImageEffect extends Effect {
	private static final int EFFECT_INTERVAL = 35;
	
	private BufferedImage m_BufferedImage;
	private Graphics2D m_Graphics2D;
	public static enum Fade { IN, OUT };
	
	private ImageIcon m_ImageIcon = new ImageIcon();
	private Image m_Image;
	private final Fade m_Fade;
	
	/**
	 * Constructor
	 * @param image the image that will be displayed
	 */
	public FadeImageEffect( Image image, Fade fade, boolean persistent ) {
		super( persistent );
		setImage( image );
		m_Fade = fade;
	}
	
	/**
	 * Set image that will be displayed
	 * @param image the image that will be displayed
	 */
	public void setImage( Image image ) {
		m_Image = image;
	}
	
	/**
	 * Get image that will be displayed
	 * @return the image that will be displayed
	 */
	public Image getImage() {
		return m_Image;
	}
	
	private void createGraphicsContext( int width, int height ) {
		m_BufferedImage = new BufferedImage( width, height, BufferedImage.TYPE_INT_RGB );
		m_Graphics2D = m_BufferedImage.createGraphics();
		m_Graphics2D.setBackground( new Color( 255, 255, 255 ) );
	}
	
	/* (non-Javadoc)
	 * @see sourceforge.net.projects.jcollapse.game.effects.Effect#drawEffect(java.awt.Graphics2D)
	 */
	public void draw( final int width, final int height ) {
		if( getImage() == null )
			throw new NullPointerException( "The image can't be null!" );
		
		new Thread( new Runnable() {
			public void run() {
				long timeDraw;
				
				setRunning( true );
				
				//if necessary, create a new graphic context...
				if( m_BufferedImage == null ||
						m_BufferedImage.getWidth() != width ||
						m_BufferedImage.getHeight() != height )
				{
					createGraphicsContext( width, height );
				}
				
				m_ImageIcon.setImage( getImage().getScaledInstance( width, height, Image.SCALE_FAST ) );
				
				//FADE IN
				//----------------------------------------------------------------------------------------
				if( m_Fade == Fade.IN ) {
					for( int x = 0; x <= width / 2 && !isStoped(); x+=3 ) {
						timeDraw = System.nanoTime();
						
						m_Graphics2D.drawImage( m_ImageIcon.getImage(), 0, 0, x, height, 0, 0, x, height, null );
						m_Graphics2D.drawImage( m_ImageIcon.getImage(), width, 0, width - x, height, width, 0, width - x, height, null );
						
						fireImageEffect( m_BufferedImage );
						try {
							Thread.sleep( Math.max( EFFECT_INTERVAL - ( ( System.nanoTime() - timeDraw ) ) / 1000000, 0 ) );
						} catch( InterruptedException ex1 ) {}
					}
					
					if( !isStoped() ) {
						m_Graphics2D.drawImage( m_ImageIcon.getImage(), 0, 0, width, height, null );
						fireImageEffect( m_BufferedImage );
					}
				} else {
				//FADE OUT
				//----------------------------------------------------------------------------------------
					m_Graphics2D.setColor( Color.BLACK );

					for( int x = 0; x <= width / 2 && !isStoped(); x+=3 ) {
						timeDraw = System.nanoTime();
						
						m_Graphics2D.drawImage( m_ImageIcon.getImage(), 0, 0, null );
						
						m_Graphics2D.fillRect( 0, 0, x, height );
						m_Graphics2D.fillRect( width - x, 0, x, height );
						
						fireImageEffect( m_BufferedImage );
						try {
							Thread.sleep( Math.max( EFFECT_INTERVAL - ( ( System.nanoTime() - timeDraw ) ) / 1000000, 0 ) );
						} catch( InterruptedException ex1 ) {}
					}
					
					if( !isStoped() ) {
						m_Graphics2D.fillRect( 0, 0, width, height );
						fireImageEffect( m_BufferedImage );
					}					
				}
				
				setRunning( false );
				fireEndImageEffect();
				System.out.println( "Thread terminated: " + Thread.currentThread().getName() );
			}
		}, getClass().getSimpleName() ).start();
	}
}