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package org.test;
 
 
/**
* <p>Title: LoonFramework</p>
* <p>Description:拼图图像处理[未优化]</p>
* <p>Copyright: Copyright (c) 2007</p>
* <p>Company: LoonFramework</p>
* @author chenpeng    
* @email：ceponline@yahoo.com.cn
* @version 0.1
*/
 
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Event;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.MediaTracker;
import java.awt.image.BufferedImage;
 
import org.loon.framework.game.helper.ImageHelper;
 
public class BlockImage extends Canvas {
        /**
         *
         */
        private static final long serialVersionUID = 1L;
 
        private Image _img;
 
        private Image _img2;
 
        private Graphics bg;
 
        private Image backimage;
 
        private int blocks[];
 
        private boolean isEvent;
 
        private MediaTracker mt;
 
        private int _width;
 
        private int _height;
 
        private int _RS;
 
        private int _CS;
 
        private Image screen = null;
 
        private Graphics later = null;
 
        private int _objWidth;
 
        private int _objHeight;
 
        private int _COUNT;
 
        /**
         * 析构函数，内部调用init方法。
         *
         * @param bImage
         * @param overImage
         * @param cs
         * @param rs
         */
        public BlockImage(Image bImage, Image overImage, int cs, int rs) {
                init(bImage, overImage, cs, rs);
        }
 
        /**
         * 初始化拼图参数。
         *
         * @param bImage
         * @param overImage
         * @param cs
         * @param rs
         */
        public void init(Image bImage, Image overImage, int cs, int rs) {
                // 列数
                _CS = cs;
                // 行数
                _RS = rs;
                // 加载拼图用图像。
                _img = bImage;
 
                // 获得实际窗体宽。
                _width = _img.getWidth(null);
                // 获得实际窗体高。
                _height = _img.getHeight(null);
                // 获得单块图像宽。
                _objWidth = _width / _CS;
                // 获得单块图像高。
                _objHeight = _height / _RS;
 
                // 本程序直接使用backimage上一块图形区域缓冲选择项，所以实际背景图像高=图形高+额外图块高。
                backimage = new BufferedImage(_width, _height + _objHeight, 1);
                // 获得生成的图形
                later = backimage.getGraphics();
                // 再创建一块图像区域，作为图像缓存用。
                screen = new BufferedImage(_width, _height, 1);
                // 获得缓存的图形
                bg = screen.getGraphics();
                // 获得等同图片总数的数组。
                _COUNT = _CS * _RS;
                blocks = new int[_COUNT];
                // 初始化为非点击。
                isEvent = false;
                // 加载完成拼图的显示图。
                _img2 = overImage;
                // 初始化图块参数。
                for (int i = 0; i < _COUNT; i++) {
                        blocks[i] = i;
                }
                // 载入MediaTracker，用以跟踪图像状态。
                mt = new MediaTracker(this);
                // 加载被跟踪的图像。
                mt.addImage(_img, 0);
                mt.addImage(_img2, 0);
                // 同步载入。
                try {
                        mt.waitForID(0);
                } catch (InterruptedException interruptedexception) {
                        return;
                }
                // 随机生成图像面板内容。
                rndPannel();
 
        }
 
        /**
         * 描绘窗体图像。
         */
        public void paint(Graphics g) {
                // 检查图像载入。
                if (mt.checkID(0)) {
                        // 描绘底层背景。
                        bg.drawImage(backimage, 0, 0, null);
                        // 判断是否触发完成事件。
                        if (!isEvent) {
                                // 设置背景色。
                                bg.setColor(Color.black);
                                // 循环绘制小图片于背景缓存中。
                                for (int i = 0; i < _CS; i++) {
                                        for (int j = 0; j < _RS; j++)
                                                bg.drawRect(i * _objWidth, j * _objHeight, _objWidth,
                                                                _objHeight);
 
                                }
 
                        }
                        // 仅当完成事件触发并且有胜利图片时，载入完成提示。
                        if (isEvent && _img2 != null) {
                                bg.drawImage(_img2, 0, 0, null);
                        }
                }
                // 举凡绘制图像时，应遵循显示图像仅绘制一次的基本原则，一次性的将背景绘制到窗体。
                // 简单来说，也就是采取[双缓存]的方式，所有复杂操作皆在缓存区完成，也只有这样才能避免产生延迟闪烁。
                g.drawImage(screen, 0, 0, this);
                g.dispose();
        }
 
        /**
         * 变更图像。
         */
        public void update(Graphics g) {
                paint(g);
        }
 
        /**
         * 鼠标点击事件。
         */
        public boolean mouseDown(Event event, int i, int j) {
 
                if (isEvent)
                        return true;
                // 换算点击位置与小图片。
                int k = i / _objWidth;
                int l = j / _objHeight;
                copy(0, 0, 0, _RS);
                copy(k, l, 0, 0);
                copy(0, _RS, k, l);
                int i1 = blocks[0];
                // 换算选中图片存储区。
                blocks[0] = blocks[l * _CS + k];
                blocks[l * _CS + k] = i1;
                int j1;
                for (j1 = 0; j1 < _COUNT; j1++) {
                        if (blocks[j1] != j1) {
                                break;
                        }
                }
                if (j1 == _COUNT)
                        isEvent = true;
                repaint();
                return true;
        }
 
        public boolean mouseUp(Event event, int i, int j) {
                return true;
        }
 
        public boolean mouseDrag(Event event, int i, int j) {
                return true;
        }
 
        /**
         * copy换算后的图像区域。
         *
         * @param i
         * @param j
         * @param k
         * @param l
         */
        void copy(int i, int j, int k, int l) {
                later.copyArea(i * _objWidth, j * _objHeight, _objWidth, _objHeight,
                                (k - i) * _objWidth, (l - j) * _objHeight);
        }
 
        /**
         * 事件触发状态。
         * @return
         */
        public boolean isEvent() {
                return isEvent;
        }
 
        public void setEvent(boolean isEvent) {
                this.isEvent = isEvent;
        }
 
        /**
         * 随机生成面板图片。
         *
         */
        void rndPannel() {
                later.drawImage(_img, 0, 0, this);
                for (int i = 0; i < (_COUNT * _CS); i++) {
                        int j = (int) ((double) _CS * Math.random());
                        int k = (int) ((double) _RS * Math.random());
                        int l = (int) ((double) _CS * Math.random());
                        int i1 = (int) ((double) _RS * Math.random());
                        copy(j, k, 0, _RS);
                        copy(l, i1, j, k);
                        copy(0, _RS, l, i1);
                        int j1 = blocks[k * _CS + j];
                        blocks[k * _CS + j] = blocks[i1 * _CS + l];
                        blocks[i1 * _CS + l] = j1;
                }
 
        }
 
        public static void main(String[] args) {
 
                Frame frm = new Frame("简单的JAVA拼图效果实现[由Loonframework框架提供]");
                frm.setSize(480, 500);
                frm.setResizable(false);
                /**
                 * PS:ImageHelper.loadImage为Loonframework框架中helper下方法，为不依赖于javax扩展包而开发。
                 * 可使用ImageIO相关方法代替。
                 */
                // 加载图像。
                Image backImage = ImageHelper.loadImage("C:/backimage.jpg", true);
                Image overImage = ImageHelper.loadImage("C:/over.gif", true);
                // BlockImage中参数分别为 用于分解的拼图，完成后显示文字，拆分图片为分几列，分拆分图片为几行。
                //建议使用正方形图片作为背景图。
                frm.add(new BlockImage(backImage, overImage, 4, 4));
                backImage = null;
                overImage = null;
                // 显示窗体。
                frm.setVisible(true);
 
        }
 
}
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