mylineaction.java~26~

Java画版程序。......................要求变态。

package myshapeaction;

/**
 * Title:
 * Description:
 * Copyright:    Copyright (c) 2002
 * Company:
 * @author
 * @version 1.0
 */

import java.awt.event.*;

import myshape.*;
import java.math.*;
import java.util.*;

public class MyLineAction extends MyActionAdapter{
  private boolean canDragged=true;
  private MyPoint startPoint;
  private MyPoint endPoint=null;
  private MyLine line;
  private boolean isSecondPoint=false;
  public MyLineAction(boolean b) {
   canDragged=b;
  }

  public boolean mousePressed(MouseEvent e,Object o){
     // System.out.print("lkdflskfd");
       LinkedList l=(LinkedList)o;
    // if(startPoint==null)
        endPoint=startPoint;
        if(l.isEmpty()){
          startPoint=new MyPoint(e.getX(),e.getY());
        }
        else{
           startPoint=((MyShape)l.getFirst()).getPoint();
        }
        startPoint.setDefaultColor(MyShape.controlColor);
        startPoint.setColor(startPoint.getDefaultColor());
        drawedItemList.add(startPoint);
        if(!canDragged){
        if(isSecondPoint){
          line=new MyLine(endPoint,startPoint);
          drawedItemList.add(line);
          isSecondPoint=false;
        }
        else{
          isSecondPoint=true;
        }
        }
          return true;
  }


  public boolean mouseDragged(MouseEvent e,Object o){

    if(canDragged &&startPoint!=null){
       endPoint=new MyPoint(e.getX(),e.getY());
       endPoint.setDefaultColor(MyShape.controlColor);
       endPoint.setColor(startPoint.getDefaultColor());
       if(!endPoint.nearTo(startPoint))
        {
         if(line!=null){
            drawedItemList.removeLast();
            drawedItemList.removeLast();
          }
         line=new MyLine(startPoint,endPoint);
         drawedItemList.add(endPoint);
         drawedItemList.add(line);
       }
    }
       return true;
  }
  public boolean mouseReleased(MouseEvent e,Object o){
   //  System.out.print("lkdflskfd");
      if(startPoint!=null ){
       /* if(endPoint==null){
          drawedItemList.removeLast();
        }
        else if(endPoint.nearTo(centerPoint)){
          drawedItemList.removeLast();
        }*/
      if(canDragged){
         startPoint=null;
         endPoint=null;
      }
      line=null;
    //  isSecondPoint=false;
     }
        return true;
  }
}