Jigsaw Puzzles From Images

This program utilizes mouse events for repositioning clipped images. The class JLayeredPane is used here so that the image which is being moved will always be on top. Everytime the user relocates an image, the program will also determine whether all the clipped images have been placed correctly. The process is performed in the mouseReleased method.

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import java.awt.*; import java.awt.event.*; import java.awt.image.*; import javax.swing.*; import java.io.*; import javax.imageio.ImageIO; import java.util.*; public class JigsawPuzzle extends JFrame{ private JPanel pinfo=null; private JLabel linfo=null; private JLayeredPane layeredPane=null; private JPanel pbutton=null; private JButton bload=null; private JButton bstart=null; private BufferedImage bufimage=null; private BufferedImage[] bufimage2=null; private String imagefile=null; private boolean loaded=false; private boolean started=false; private JLabel[] lbox=null; private int bufwidth; private int bufheight; ArrayList<Integer> lstposition=null; private int boxselected=-1; private Point ptemp=null; public static void main(String[] args){ JigsawPuzzle ap=new JigsawPuzzle(); } public JigsawPuzzle(){ super("Jigsaw Puzzle"); setSize(700,700); pinfo=new JPanel(); pinfo.setPreferredSize(new Dimension(700,50)); linfo=new JLabel(""); pinfo.add(linfo); layeredPane=new DrawPanel(); layeredPane.setLayer(this, 0); layeredPane.setPreferredSize(new Dimension(700,600)); layeredPane.addMouseListener(new MouseHandler()); layeredPane.addMouseMotionListener(new MouseHandler()); pbutton=new JPanel(); pbutton.setPreferredSize(new Dimension(700,50)); bload=new JButton("Load"); bload.addActionListener(new ButtonHandler()); bstart=new JButton("Start"); bstart.addActionListener(new ButtonHandler()); setLayout(new BorderLayout()); add(BorderLayout.NORTH,pinfo); add(BorderLayout.CENTER,layeredPane); pbutton.add(bload); pbutton.add(bstart); add(BorderLayout.SOUTH,pbutton); lbox=new JLabel[16]; for(int i=0;i<16;i++){ lbox[i]=new JLabel(); } bufimage2=new BufferedImage[16]; lstposition=new ArrayList<Integer>(16); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); show(); } class DrawPanel extends JLayeredPane{ public void paintComponent(Graphics g){ super.paintComponent(g); Graphics2D g2=(Graphics2D)g; if(loaded==true){ try{ bufimage=ImageIO.read(new File(imagefile)); }catch(Exception ex){ } bufwidth=bufimage.getWidth(); bufheight=bufimage.getHeight(); layeredPane.setPreferredSize(new Dimension(bufwidth,bufheight)); int counter=0; try{ for(int i=0;i<4;i++){ for(int j=0;j<4;j++){ bufimage2[counter]=bufimage.getSubimage((bufwidth/4)*j,(bufheight/4)*i,bufwidth/4,bufheight/4); counter++; } } }catch(Exception e){ } counter=0; for(int i=0;i<4;i++){ for(int j=0;j<4;j++){ layeredPane.add(lbox[counter],1); lbox[counter].setBounds((bufwidth/4)*j,(bufheight/4)*i,bufwidth/4,bufheight/4); counter++; } } for(int i=0;i<16;i++){ ImageIcon icon=new ImageIcon(bufimage2[i]); lbox[i].setIcon(icon); } loaded=false; } if(started==true){ lstposition.clear(); for(int i=0;i<16;i++){ lstposition.add(i,i); } Random rand=new Random(); for(int i=0;i<16;i++){ int temp=rand.nextInt(16); int temp2=lstposition.get(i); lstposition.set(i,lstposition.get(temp)); lstposition.set(temp,temp2); } int counter=0; for(int i=0;i<4;i++){ for(int j=0;j<4;j++){ lbox[lstposition.get(counter)].setLocation((bufwidth/4)*j,(bufheight/4)*i); counter++; } } linfo.setText(""); started=false; } } } class MouseHandler implements MouseMotionListener, MouseListener{ public void mouseMoved(MouseEvent e){ } public void mouseDragged(MouseEvent e){ if(boxselected!=-1){ layeredPane.moveToFront(lbox[boxselected]); lbox[boxselected].setLocation(e.getX(),e.getY()); } } public void mouseEntered(MouseEvent e){ } public void mouseExited(MouseEvent e){ } public void mouseReleased(MouseEvent e){ for(int i=0;i<lbox.length;i++){ if(i==boxselected){ lbox[boxselected].setLocation(ptemp); continue; } if(e.getX()>lbox[i].getX()&&e.getX()<lbox[i].getX()+lbox[i].getWidth() &&e.getY()>lbox[i].getY()&&e.getY()<lbox[i].getY()+lbox[i].getHeight()){ lbox[boxselected].setLocation(lbox[i].getX(),lbox[i].getY()); lbox[i].setLocation(ptemp); break; } } boolean win=true; int counter=0; for(int i=0;i<4;i++){ for(int j=0;j<4;j++){ Point p=lbox[counter].getLocation(); if(!(p.x==(bufwidth/4)*j&&p.y==(bufheight/4)*i)){ win=false; break; } counter++; } } if(win){ linfo.setText("You win!"); } boxselected=-1; } public void mousePressed(MouseEvent e){ for(int i=0;i<lbox.length;i++){ if(e.getX()>lbox[i].getX()&&e.getX()<lbox[i].getX()+lbox[i].getWidth() &&e.getY()>lbox[i].getY()&&e.getY()<lbox[i].getY()+lbox[i].getHeight()){ boxselected=i; ptemp=lbox[boxselected].getLocation(); break; } } } public void mouseClicked(MouseEvent e){ } } class ButtonHandler implements ActionListener{ public void actionPerformed(ActionEvent e){ if(e.getActionCommand()=="Load"){ FileDialog fd=new FileDialog(JigsawPuzzle.this,"Open Image File",FileDialog.LOAD); fd.setDirectory("C:\\"); fd.setVisible(true); imagefile=fd.getDirectory()+fd.getFile(); loaded=true; layeredPane.repaint(); } if(e.getActionCommand()=="Start"){ started=true; layeredPane.repaint(); } } } }

Image Source: www.pixabay.com