mycircleaction.java~33~

来自「Java画版程序。......................要求变态。」· JAVA~33~ 代码 · 共 77 行

package myshapeaction;

/**
 * Title:
 * Description:
 * Copyright:    Copyright (c) 2002
 * Company:
 * @author
 * @version 1.0
 */
import java.awt.event.*;
//import java.util.*;
//import myframe.*;
import myshape.*;
import java.math.*;
import java.util.*;

public class MyCircleAction extends MyActionAdapter{
  private boolean canDragged=false;
  MyPoint centerPoint;
  MyCircle circle;
  public MyCircleAction() {
  }
   public boolean mousePressed(MouseEvent e,Object o){
     // System.out.print("lkdflskfd");
     LinkedList l=(LinkedList)o;
     if(!canDragged){
        if(l.isEmpty()){
        centerPoint=new MyPoint(e.getX(),e.getY());
        }
        else{
          centerPoint=((MyShape)l.getFirst()).getPoint();
        }
        //centerPoint.attachToOthers=true;
        centerPoint.setColor(centerPoint.controlColor);
        canDragged=true;
        drawedItemList.add(centerPoint);
        circle=null;
     }
     return true;
  }
  private MyPoint endPoint=null;

  public boolean mouseDragged(MouseEvent e,Object o){

    if(canDragged  ){
       endPoint=new MyPoint(e.getX(),e.getY());
       endPoint.setColor(endPoint.controlColor);
       if(!endPoint.nearTo(centerPoint))
        {

          if(circle!=null){
            drawedItemList.removeLast();
            drawedItemList.removeLast();
          }
         circle=new MyCircle(centerPoint,endPoint);
         drawedItemList.add(endPoint);
         drawedItemList.add(circle);
       }
    }
       return true;
  }
  public boolean mouseReleased(MouseEvent e,Object o){
   //  System.out.print("lkdflskfd");
      if(centerPoint!=null ){
       /* if(endPoint==null){
          drawedItemList.removeLast();
        }
        else if(endPoint.nearTo(centerPoint)){
          drawedItemList.removeLast();
        }*/
      centerPoint=null;
      canDragged=false;
     }
        return true;
  }
}