package VTest2;

import java.awt.Color;
import java.awt.Cursor;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.Border;
import javax.swing.border.CompoundBorder;
import javax.swing.border.EtchedBorder;
import javax.swing.border.LineBorder;

public class WindowDragSize {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		final JFrame frame = new JFrame();
		frame.setUndecorated(true);
		  Border b = new CompoundBorder(new EtchedBorder(),new LineBorder(Color.RED));
          final JPanel panel = new JPanel(){
				@Override
		        public void paintComponent(Graphics g) {
		            ImageIcon icon =
		                    new ImageIcon("C:\\Users\\asus\\Desktop\\新建文件夹\\6.jpg");
		            // 图片随窗体大小而变化
		            g.drawImage(icon.getImage(), 0, 0,
		            		frame.getSize().width,frame.getSize().height,frame);
		        }};
		  panel.setSize(200,100);
		  panel.setBorder(b);
		  
		  
		  panel.addMouseMotionListener(new MouseAdapter() {
			    private boolean top = false;
			    private boolean down = false;
			    private boolean left = false;
			    private boolean right = false;
			    private boolean drag = false;
			    private Point lastPoint = null;
			    private Point draggingAnchor = null;
	            @Override
	            public void mouseMoved(MouseEvent e) {
	            	if(  e.getPoint().getY() == 0 ){
	            		frame.setCursor(Cursor.getPredefinedCursor(Cursor.N_RESIZE_CURSOR));
	            		top = true;
	            	}else if(Math.abs(e.getPoint().getY()- frame.getSize().getHeight()) <=5 ){
	            		frame.setCursor(Cursor.getPredefinedCursor(Cursor.N_RESIZE_CURSOR));
	            		down = true;
	            	}else if(e.getPoint().getX() == 0 ){
	            		frame.setCursor(Cursor.getPredefinedCursor(Cursor.E_RESIZE_CURSOR));
	            		left = true;
	            	}else if(Math.abs(e.getPoint().getX()- frame.getSize().getWidth()) <=5 ){
	            		frame.setCursor(Cursor.getPredefinedCursor(Cursor.E_RESIZE_CURSOR));
	            		right = true;
	            	}else{
	            		frame.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
	            		draggingAnchor = new Point(e.getX() + panel.getX(), e.getY() + panel.getY());
	            		top = false;
	            		down = false;
	            		left = false;
	            		right = false;
	            		drag = true;
	            	}
	  
	            }
	            
	            @Override
	            public void mouseDragged(MouseEvent e) {
	            	Dimension dimension = frame.getSize();
	            	if(top){
	            		
	            		dimension.setSize(dimension.getWidth() ,dimension.getHeight()-e.getY());
	            		frame.setSize(dimension);
	            		frame.setLocation(frame.getLocationOnScreen().x, frame.getLocationOnScreen().y + e.getY());
	            	}else if(down){
	              
	            		dimension.setSize(dimension.getWidth() , e.getY());
	            		frame.setSize(dimension);
	      
	            	}else if(left){
	            	 
	            		dimension.setSize(dimension.getWidth() - e.getX() ,dimension.getHeight() );
	            		frame.setSize(dimension);
	            		
	     
	            		frame.setLocation(frame.getLocationOnScreen().x + e.getX(),frame.getLocationOnScreen().y );
	                
	            	}else if(right){
	            	 
	            		dimension.setSize(e.getX(),dimension.getHeight());
	            		frame.setSize(dimension);
	            	}else {	
	                    frame.setLocation(e.getLocationOnScreen().x - draggingAnchor.x, e.getLocationOnScreen().y - draggingAnchor.y);
	            	}
	            }
	        });

		  frame.setLocation(200,100);
		  frame.getContentPane().add(panel);
		  frame.setSize(200,100);
		  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		  frame.setAlwaysOnTop(true);
		  frame.show();
		  
	}

}