package com.listener;import java.awt.Graphics;import java.awt.Graphics2D;import java.awt.Paint;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.MouseEvent;import java.awt.event.MouseListener;import java.awt.event.MouseMotionListener;import java.util.ArrayList;import java.util.concurrent.Callable;import java.util.concurrent.FutureTask;import javax.swing.JButton;import javax.swing.JPanel;import com.board.Board;public class LineListener implements MouseListener,ActionListener,MouseMotionListener{	Board board;	JPanel zone;	Graphics g;	Graphics2D g2;	Paint paint;	public final int LINE=1;	public final int RECT=2;	public final int CIRCLE=3;	public int fig=0;	ArrayList listx=new ArrayList();	ArrayList listy=new ArrayList();	int x1=0;	int x2=0;	int y1=0;	int y2=0;			@Override	public void mouseClicked(MouseEvent e) {		// TODO 自动生成的方法存根				switch(fig){			case LINE:drawline(e) ;            case RECT: drawrect(e);			case CIRCLE: drawcircle(e);		}					}	/*	 * draw circle	 */	public void drawcircle(MouseEvent e){		getzone(e);		if(g==null){			g=zone.getGraphics();		}		g.drawOval(e.getX(), e.getY(), 40, 40);				zone.paintComponents(g);			}	/*	 * draw rect	 */	public void drawrect(MouseEvent e){		getzone(e);		if(g==null){			g=zone.getGraphics();		}		g.drawRect(e.getX(), e.getY(), 40, 40);		zone.paintComponents(g);			}	/*	 * draw line	 */	public void drawline(MouseEvent e){		getzone(e);		if(g==null){			g=zone.getGraphics();		}				if(x1==0&&y1==0){			//g.drawLine(x1, y1, x1+20, y1+10);			x2=e.getX();			y2=e.getY();			g.drawLine(x2, y2, x2, y2);			listx.add(x2);			listy.add(y2);			x1=x2;			y1=y2;		}		else{			x2=e.getX();			y2=e.getY();			g.drawLine(x1, y1, x2, y2);			listx.add(x2);			listy.add(y2);			x1=x2;			y1=y2;		}				zone.paintComponents(g);//show line				System.out.println(x1+"/n"+y1);	}			/*	 * get zone to draw	 * 	 */	public void getzone(MouseEvent e){		if(zone==null){			zone=(JPanel) e.getSource();		}			}	@Override	public void mouseEntered(MouseEvent arg0) {		// TODO 自动生成的方法存根	}	@Override	public void mouseExited(MouseEvent arg0) {		// TODO 自动生成的方法存根	}	@Override	public void mousePressed(MouseEvent arg0) {		// TODO 自动生成的方法存根	}	@Override	public void mouseReleased(MouseEvent arg0) {		// TODO 自动生成的方法存根	}	@Override	public void actionPerformed(ActionEvent e) {		// TODO 自动生成的方法存根		JButton but=(JButton) e.getSource();				if(but.getText()=="线    "){			fig=LINE;					}		else if(but.getText()=="矩形"){			fig=RECT;					}		else if(but.getText()=="圆形"){			fig=CIRCLE;					}	}	@Override	public void mouseDragged(MouseEvent e) {		// TODO 自动生成的方法存根				drawline(e);			}		@Override	public void mouseMoved(MouseEvent arg0) {		// TODO 自动生成的方法存根	}		}