import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import java.util.Vector;
import java.awt.image.*;
public class PuzzlePad extends JPanel implements ActionListener
{
  int rows ,colums;           
  int width,height;           
  SquarePoint point[][];      
  JButton block[][];          
  Vector vector;              
  int leftX=50,leftY=50;    
  Image image=null;
  Toolkit tool=null;
  MediaTracker mt; 
  int 圖像的寬,圖像的高;
  Image blockImage[];         
  boolean 畫圖像=true;
       
  public PuzzlePad(int r,int c,int w,int h)
    {
      setLayout(null);
      vector=new Vector();
      rows=r;
      colums=c;
      width=w;
      height=h;
      tool=getToolkit();
      try 
         {
           image=tool.createImage("氣球.jpg");
           mt.addImage(image,1);
           mt.waitForAll();
         }
      catch(Exception e)
         {
         }
      block=new JButton[rows][colums];
      point=new SquarePoint[rows][colums];
      for(int i=0;i<rows;i++)
         { 
          for(int j=0;j<colums;j++)
            {
               if((i==rows-1)&&(j==colums-1))
                  {
                  }
               else    
               {
                block[i][j]=new JButton();
                block[i][j].setSize(width,height);
                block[i][j].addActionListener(this);
                vector.add(block[i][j]);
               }
            }
         }
       for(int i=0;i<rows;i++)
         { 
          for(int j=0;j<colums;j++)
            {
              point[i][j]=new SquarePoint(50+j*width,50+i*height);
               if((i==rows-1)&&(j==colums-1))
                  {
                  }
               else
                  {
                   point[i][j].setBlock(block[i][j],this);
                 }
            }
         } 
    }

   public void actionPerformed(ActionEvent e)
    {
      JButton button=(JButton)e.getSource();
      int x=button.getBounds().x;
      int y=button.getBounds().y;
      int m=0,n=0;
      
      for(int i=0;i<rows;i++)
         { 
          for(int j=0;j<colums;j++)
           {
             if(point[i][j].getX()==x&&point[i][j].getY()==y)
                {
                  m=i;
                  n=j;                               
                }
           }
         }
       
       int 上=Math.max(0,m-1);
       int 下=Math.min(rows-1,m+1);
       int 左=Math.max(0,n-1);
       int 右=Math.min(colums-1,n+1);
       
       if(point[上][n].get有方塊()==false)          
         {
           point[上][n].setBlock(button,this);
           point[m][n].set有方塊(false);
         }
       else if(point[下][n].get有方塊()==false)     
         {
           point[下][n].setBlock(button,this);
           point[m][n].set有方塊(false);
         }
       else if(point[m][左].get有方塊()==false)     
         {
           point[m][左].setBlock(button,this);
           point[m][n].set有方塊(false);
         }
       else if(point[m][右].get有方塊()==false)     
         {
           point[m][右].setBlock(button,this);
           point[m][n].set有方塊(false);
         }
    }
  public void 隨機排列數字()
    { 
       vector.removeAllElements();
       for(int i=0;i<rows;i++)
         { 
          for(int j=0;j<colums;j++)
            {
               if((i==rows-1)&&(j==colums-1))
                  {
                  }
               else
                  {
                     vector.add(block[i][j]);
                  }
            }
         }
      int i=1;
      while(vector.size()>0)
        {
          int n=(int)(Math.random()*vector.size());
          JButton b=(JButton)vector.elementAt(n);
          b.setText(""+i);
          b.setIcon(null);
          b.setBorder(BorderFactory.createLineBorder(Color.blue,1));
          vector.remove(n);
          i++;
        }
      畫圖像=false;
      repaint();  
    }
  public void 隨機排列圖像()
    {
     try
       {
         圖像的寬=image.getWidth(this);
         圖像的高=image.getHeight(this);
     
        
        
        int w=圖像的寬/colums;                                    
        int h=圖像的高/rows;
        
        blockImage=new Image[rows*colums];
        int k=0; 
        PixelGrabber pg=null;  
        ImageProducer ip=null;                 
        for(int i=0;i<rows;i++)
          { 
            for(int j=0;j<colums;j++)
             {
              int pixels[]= new int[w*h]; 
              pg=new PixelGrabber(image,j*w,i*h,w,h,pixels,0,w);            
              pg.grabPixels();                                              
              ip=new  MemoryImageSource(w,h,pixels,0,w);
              blockImage[k]=tool.createImage(ip); 
              k++;
             
             }
          }
       vector.removeAllElements();
       for(int i=0;i<rows;i++)
         { 
          for(int j=0;j<colums;j++)
            {
               if((i==rows-1)&&(j==colums-1))
                  {
                  }
               else
                  {
                     vector.add(block[i][j]);
                  }
            }
         }
        int num=0;
        while(vector.size()>0)
        {
          int n=(int)(Math.random()*vector.size());
          JButton b=(JButton)vector.elementAt(n);
          b.setIcon(new ImageIcon(blockImage[num]));
          b.setBorder(null);
          b.setText("");
          vector.remove(n);
          num++; 
        } 
       畫圖像=true;
       repaint();
      }
     catch(Exception ee)
      {
      } 
    }
 
  public void paintComponent(Graphics g)
    {
       super.paintComponent(g); 
       g.setColor(Color.black);
       g.fillRect(leftX,leftY,colums*width,rows*height);
       if(畫圖像==true)
       {
        g.drawImage(image,colums*width+80,height,colums*width,rows*height,this);
        
        for(int i=0;i<rows;i++)
         {
          g.setColor(Color.white);
          g.drawLine(colums*width+80,height+i*height,
                    colums*width+80+colums*width,height+i*height);
         }
        for(int j=0;j<colums;j++)
         {
           g.drawLine(colums*width+80+j*width,height,
                      colums*width+80+j*width,height+rows*height);
         }
        g.setColor(Color.black);
        
        g.fillRect(colums*width+80+(colums-1)*width,
                   height+(rows-1)*height, width, height);
       }
    
    }
}