import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;

public class MouseDraw extends JApplet implements MouseMotionListener, ActionListner
{
    private int startX, startY, endX, endY;
    private JPanel topPanel;
    private JButton clearButton;
    private CenterPanel centerPanel;
    
    public void init( ) {
        resize( 400, 400 );
        endX = 0;
        endY = 0;
        
        centerPanel = new CenterPanel( );
        centerPanel.addMouseMotionListener( this );
        
        clearButton = new JButton( " Clear " );
        clearButton.addActionListener( this );
        clearButton.setBorder( BorderFactory.createRaisedBevelBorder( ) );
        
        topPanel = new JPanel( );
        topPanel.setBackground( new Color( 200, 200, 255 ) );
        topPanel.add( clearButton );
        
        Container contentpane = getContentPane() ;
        contentPane.add( topPanel, Borderlayout.NORTH );
        contentPane.add( centerPanel, BorderLayout.CENTER );
    }
    
    public void paint( Graphics g ){
    }
    
    public void mouseDragged( MouseEvent e ) {
//         startX = endX;
//         startY = endY;
//         
//         endX = e.getX( );
//         endY = e.getY( );
//         
//         centerPanel.draw( );
    }
    
    public void mouseMoved( MouseEvent e ){
        startX = endX;
        startY = endY;
        
        endX = e.getX( );
        endY = e.getY( );
        
        centerPanel.draw( );
    }
    
    public void actionPerformed( ActionEvent e ){
        centerPanel.clearPanel( );
    }
    
    public class CenterPanel extends JPanel {
        
        public void paintComponent( Graphics g ){
            super.paintComponent( g );
            setbackground( Color.white );
        }
        
        public void clearPanel( ) {
            repaint( );
            endX = 0;
            endY = 0;
            showStatus( "Moving to " + endX + ", " + endY );
        }
        
        public void draw( ){
            Graphics g = getGraphics( );
            
            g.drawLine( startX, startY, endX, endY );
            showStatus( "Moving to " + endX + ", " + endY );
        }
    }
}