小翼的java俄罗斯方块----总结（3）

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到目前为止实现的功能为下图所示：

实现的过程：

1,封装了一个抽象类Layer，这个抽象类实现了绘制窗口的功能protected void createWindow(Graphics g)，另外还定义了一个抽象方法abstract public void paint(Graphics g);

为方便后面子类进行继承重写。

具体代码如下所示：

package ui;

import java.awt.Graphics;
import java.awt.Image;

import javax.swing.ImageIcon;

/*绘制窗口
@author cm*/

public abstract class Lay {

   private static final int SIZE=7;

   private static Image WINDOW_IMG = new ImageIcon("graphics/window/window.png").getImage();

   private static int WINDOW_W= WINDOW_IMG.getWidth(null);

   private static int WINDOW_H = WINDOW_IMG.getHeight(null);

   /* 窗口左上角x坐标*/
   protected int x;

   /*窗口左上角y坐标*/
   protected int y;

   /*窗口宽度*/
   protected int w;

   /*窗口高度*/
   protected int h;

   protected Lay(int x ,int y ,int w , int h){
       this.x = x;
       this.y = y;
       this.w = w;
       this.h = h;

   }
   /*绘制窗口*/
   protected void createWindow(Graphics g){
       //ctrl+shift+o能够快速引包

                //左上
               g.drawImage(WINDOW_IMG, x, y, x+SIZE, y+SIZE, 0, 0, SIZE, SIZE, null);
               //中上
               g.drawImage(WINDOW_IMG, x+SIZE, y, x+w-SIZE, y+SIZE, SIZE, 0, WINDOW_W-SIZE, SIZE, null);
               //右上
               g.drawImage(WINDOW_IMG, x+w-SIZE, y, x+w, y+SIZE, WINDOW_W-SIZE, 0, WINDOW_W, SIZE, null);
               //左中
               g.drawImage(WINDOW_IMG, x, y+SIZE, x+SIZE, y+h-SIZE, 0, SIZE, SIZE, WINDOW_H-SIZE, null);
               //中
               g.drawImage(WINDOW_IMG, x+SIZE, y+SIZE, x+w-SIZE, y+h-SIZE, SIZE, SIZE, WINDOW_W-SIZE, WINDOW_H-SIZE, null);
               //右中
               g.drawImage(WINDOW_IMG, x+w-SIZE, y+SIZE, x+w, y+h-SIZE, WINDOW_W-SIZE, SIZE, WINDOW_W, WINDOW_H-SIZE, null);
               //左下
               g.drawImage(WINDOW_IMG, x, y+h-SIZE, x+SIZE, y+h, 0, WINDOW_H-SIZE, SIZE, WINDOW_H, null);
               //中下
               g.drawImage(WINDOW_IMG, x+SIZE, y+h-SIZE, x+w-SIZE, y+h, SIZE, WINDOW_H-SIZE, WINDOW_W-SIZE, WINDOW_H, null);
               //右下
               g.drawImage(WINDOW_IMG, x+w-SIZE, y+h-SIZE, x+w, y+h, WINDOW_W-SIZE, WINDOW_H-SIZE, WINDOW_W, WINDOW_H, null);


   }
   abstract public void paint(Graphics g);
}
2.panel上面有8个窗口，所以定义八个子类从Layer继承，实现这八个窗口的绘制，这个八个类分别为：LayerDataBase，LayerDisk，LayerGame，LayerButton，LayerNext，LayerLevel，LayerPoint，LayerAbout

具体代码实现如下：（八个都类似）

package ui;

import java.awt.Graphics;

public class LayDataBase extends Lay {

   public LayDataBase(int x ,int y, int w, int h){
       super(x,y,w,h);
   }
   public void paint(Graphics g){
       this.createWindow(g);
   }
}
3.通过PanelGame类来具体实现

具体代码实现如下：

package ui;

import java.awt.Graphics;
import javax.swing.JPanel;

public class PanelGame extends JPanel {
   //ctrl+d是直接删除行
   /*private Lay lay1 = new Lay(40,32,334,279);
   private Lay lay2 = new Lay(40,343,334,279);
   private Lay lay3 = new Lay(414,32,334,590);*/

   private Lay[] lays = null;

   public PanelGame(){
       lays = new Lay[]{
               //硬编码，是非常不好的开发习惯，要尽量将数字
               //或者字符串定义成常量，或者写入配置文件中。
               new LayDataBase(40,32,334,279),
               new LayDisk(40,343,334,279),
               new LayGame(414,32,334,590),
               new LayButton(788,32,334,124),
               new LayNext(788,188,176,148),
               new LayLevel(964,188,158,148),
               new LayPoint(788,368,334,200),

       };

   }
   @Override
   public void paintComponent(Graphics g){

       //循环刷新游戏画面
       for(int i = 0; i < lays.length; i++){
           //刷新层窗口
           lays[i].paint(g);
       }

   }


}

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