mysegment.java~6~

Java画版程序。......................要求变态。

package myshape;
import java.awt.*;
import myframe.*;

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

public class MySegment extends MyShapeAdapter{

  public MySegment() {
  }
  private MyPoint startPoint,endPoint;
 //private int radius;

 public MySegment(MyPoint start,MyPoint end){
 startPoint=start;
 endPoint=end;
 }
 private Color color=super.defaultColor;
 private Color defaultColor=super.defaultColor;
 public  void setColor(Color c){
   color=c;
 }
 public Color getColor(){
   return color;
 }
 public void setDefaultColor(Color c){
   defaultColor=c;
 }
 public Color getDefaultColor(){
   return defaultColor;
 }
 public void paint(Graphics g){
   g.setColor(color);
   g.drawLine(startPoint.getX(),startPoint.getY(),endPoint.getX(),endPoint.getY());
 }

  public MyShape getShape(){
   MySegment s=(MySegment)this.clone();
   s.startPoint=(MyPoint)startPoint.clone();
   s.endPoint=(MyPoint)endPoint.clone();
   //MyLine l=(MyLine)this.clone();
   //l.startPoint.moveObject(startPoint.getX()+4,centerPoint.getY()+4);
   //l.endPoint.moveObject(endPoint.getX()+4,endPoint.getY()+4);
   return s;
 }

 public void moveObject(MyShape s,int x,int y){

   MyPoint p1=(MyPoint)s;

   int tempx=startPoint.getX()-endPoint.getX();
   int tempy=startPoint.getY()-endPoint.getY();
   if(tempx==0){
     if((y-startPoint.getY())*(y-endPoint.getY())>0)
      return;
    p1.moveObject(startPoint.getX(),y);
   }
   else if(tempy==0){
   if((x-startPoint.getX())*(x-endPoint.getX())>0)
      return;
    p1.moveObject(x,startPoint.getY());
   }
   else{
   if((x-startPoint.getX())*(x-endPoint.getX())>0)
     return;
    double k1=tempy*1.0/tempx;
    double k2=-1/k1;
    double temp1=startPoint.getY()-k1*startPoint.getX();
    double temp2=y-k2*x;
    p1.moveObject((int)((temp1-temp2)/(k2-k1)),(int)((k2*temp1-k1*temp2)/(k2-k1)));
   }
 }
 public void moveObject(int x,int y){
   if(movedPoint!=null){
      if(!moveLine){
      // movedPoint.moveObject(x,y);
      }
      else{
        int tempx=x-movedPoint.getX();
        int tempy=y-movedPoint.getY();

        movedPoint=new MyPoint(x,y);
        startPoint.moveObject(tempx+startPoint.getX(),tempy+startPoint.getY());
        endPoint.moveObject(tempx+endPoint.getX(),tempy+endPoint.getY());
      }
   }

 }
 private MyPoint movedPoint;
 private boolean moveLine=false;

 public boolean nearTo(int x,int y){
 //centerPoint.attachToOthers=false;
  movedPoint=null;
  if(startPoint.nearTo(x,y)){
   //  centerPoint.attachToOthers=true;
    // movedPoint=startPoint;
     moveLine=false;
     return false;
  }
  if(endPoint.nearTo(x,y)){
     //movedPoint=endPoint;
     moveLine=false;
     return false;
  }
  //centerPoint.attachToOthers=true;
  int tempx=(startPoint.getX()-x)*(endPoint.getX()-x);
  int tempy=(startPoint.getY()-y)*(endPoint.getY()-y);
  if(tempx<=0 && tempy<=0){
    tempx=(startPoint.getX()-x)*(endPoint.getY()-y);
    tempy=(startPoint.getY()-y)*(endPoint.getX()-x);
    tempx=(int)Math.sqrt(Math.abs(tempx-tempy));
 // System.out.print("OK  "+tempx);
    if(tempx<20){
     movedPoint=new MyPoint(x,y);
     moveLine=true;
     return true;
    }
  }
  return false;
 }
 public String toString(){
   String s="线段";
   return s;
  }
 public MyPoint getPoint(){
   return movedPoint;
 }
}