texteffect.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.Font;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;

/**
 * Text effect
 * @author erico
 */
public class TextEffect extends Effect {
	private BufferedImage m_BufferedImage;
	private Graphics2D m_Graphics2D;
	
	private String m_Text;
	private int m_Duration;
	private Font m_Font = new Font( "Arial", Font.BOLD, 24 );
	
	private static final Color m_ColorTransparent = new Color( 255, 255, 255, 80 );
	
	/**
	 * Constructor
	 * @param text the text that will be displayed
	 * @param duration the time that effect will be played
	 */
	public TextEffect( String text, int duration, boolean persistent ) {
		super( persistent );
		setText( text );
		setDuration( duration );
	}
	
	public TextEffect( int duration, boolean persistent ) {
		this( null, duration, persistent );
	}
	
	/**
	 * Get time that effect will be played
	 * @return the time that effect will be played
	 */
	public int getDuration() {
		return m_Duration;
	}
	
	/**
	 * Set the time that effect will be played
	 * @param duration the time that effect will be played
	 */
	public void setDuration( int duration ) {
		if( duration < 0 )
			throw new IllegalArgumentException( "Interval can't be negative!" );
		
		m_Duration = duration;
	}
	
	/**
	 * Get the font for text that will be displayed
	 * @return the font for text that will be displayed
	 */
	public Font getFont() {
		return m_Font;
	}
	
	/**
	 * Set the font for text that will be displayed
	 * @param font the font for text that will be displayed
	 */
	public void setFont( Font font ) {
		if( font == null )
			throw new IllegalArgumentException( "Font can't be null!" );
		
		m_Font = font;
	}
	
	/**
	 * Set text that will be displayed
	 * @param text the text that will be displayed
	 */
	public void setText( String text ) {
		m_Text = text;
	}
	
	/**
	 * Get text that will be displayed
	 * @return the text that will be displayed
	 */
	public String getText() {
		return m_Text;
	}
	
	private void createGraphicsContext( int width, int height ) {
		m_BufferedImage = new BufferedImage( width, height, BufferedImage.TYPE_4BYTE_ABGR_PRE );
		m_Graphics2D = m_BufferedImage.createGraphics();
		m_Graphics2D.setBackground( new Color( 255, 255, 255, 0 ) );
	}
	
	/* (non-Javadoc)
	 * @see sourceforge.net.projects.jcollapse.game.effects.Effect#drawEffect(java.awt.Graphics2D)
	 */
	public void draw( int width, int height ) {
		final int w, h, x, y;
		
		if( getText() == null )
			throw new NullPointerException( "The text can't be null!" );
		
		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_Graphics2D.setColor( Color.WHITE );
		m_Graphics2D.setFont( getFont() );
		m_Graphics2D.clearRect( 0, 0, width, height );
		
		w = m_Graphics2D.getFontMetrics().charsWidth( getText().toCharArray(), 0, getText().length() );
		h = m_Graphics2D.getFontMetrics().getHeight();
		x = width / 2 - w / 2;
		y = height / 2 - h / 2;

		m_Graphics2D.setColor( m_ColorTransparent );
		m_Graphics2D.fillRoundRect( x - 6, y - h + 3, w + 12, h + 3, 8, 8 );
		
		new Thread( new Runnable() {
			public void run() {
				boolean color = false;
				long duration = System.currentTimeMillis() + getDuration();
				
				while( ( getDuration() == 0 || duration > System.currentTimeMillis() ) && !isStoped() ) {
					m_Graphics2D.setColor( ( ( color = !color ) ? Color.GRAY : Color.WHITE ) );
					m_Graphics2D.drawString( getText(), x, y );
					fireImageEffect( m_BufferedImage );
					try {
						Thread.sleep( 150 );
					} catch( InterruptedException ex1 ) {}
				}
				
				if( !isStoped() ) {
					m_Graphics2D.setColor( Color.BLACK );
					m_Graphics2D.drawString( getText(), x, y );
					fireImageEffect( m_BufferedImage );
				}
				
				setRunning( false );
				fireEndImageEffect();
				System.out.println( "Thread terminated: " + Thread.currentThread().getName() );
			}
		}, getClass().getSimpleName() ).start();
	}
}