imagepanel.java

eclipse下面实现的java扫雷游戏

/*
 * Created on 2005-5-10
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
package view;

import java.awt.AlphaComposite;
import java.awt.Composite;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import javax.swing.Timer;
import javax.swing.JPanel;

/**
 * @author mqqqvpppm
 * 
 * TODO To change the template for this generated type comment go to Window -
 * Preferences - Java - Code Style - Code Templates
 */
public class ImagePanel extends JPanel implements ActionListener {

	/**
	 *  
	 */
	public ImagePanel(Image image) {
		super();
		imageArray = new ArrayList();
		imageArray.add(image);
		this.image = image;
		width = image.getWidth(null);
		height = image.getHeight(null);
		setSize(width, height);
		sign = 1;
		amount = 1;
		waitTime = 100;
		waitTime2 = 5;
		i = 0;
		alpha = 100;
		timer = new Timer(50, this);

		// TODO Auto-generated constructor stub
	}

	public void setInterval(int interval) {
		timer.setDelay(interval);
	}

	public void start() {
		timer.start();

	}

	public void stop() {
		try {
			timer.wait();
		} catch (Exception e) {

		}
	}

	public void add(Image image) {
		imageArray.add(image);
		amount++;
	}

	public void setBounds(int x, int y, int width, int height) {
		this.width = width;
		this.height = height;
		super.setBounds(x, y, width, height);
	}

	public void setSize(int width, int height) {
		this.width = width;
		this.height = height;
		super.setSize(width, height);
	}

	public void paintComponent(Graphics g) {
		super.paintComponent(g);
		Graphics2D g2 = (Graphics2D) g;
		if (image == null)
			return;
		//draw image with alpha
		Composite comp = AlphaComposite.getInstance(AlphaComposite.SRC_OVER,
				(float) alpha / 100f);
		Composite c = g2.getComposite();
		g2.setComposite(comp);
		g2.drawImage(image, 0, 0, width, height, null);
		g2.setComposite(c);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see java.awt.event.ActionListener#actionPerformed(java.awt.event.ActionEvent)
	 */
	public void actionPerformed(ActionEvent e) {
		if (alpha == 100) {//alpha of image will be decreased
			sign = -1;

			//the delay before the alpha of image will be decreased
			--waitTime;
			if (waitTime != 0)
				return;
			waitTime = 100;
		} else if (alpha == 0) {//image will change

			//the delay before the next image appear
			--waitTime2;
			if (waitTime2 != 0)
				return;
			waitTime2 = 5;

			//change the sign go add the alpha
			sign = 1;

			//calculate i to load the image circularly
			i++;
			if (i == amount)
				i = 0;
			image = (Image) imageArray.get(i);
		}

		alpha = alpha + 10 * sign;
		repaint();
	}

	private Timer timer;

	private Image image;

	private int alpha;

	private int width;

	private int height;

	private int amount;

	private int sign;

	private int i;

	private int interval;

	private int waitTime;

	private int waitTime2;

	private ArrayList imageArray;
}