package com.wiziflow.gui;import javax.swing.*;import java.awt.*;/** * 工具類。用于輔助計算 */public class Tools {  public static Point[] getClosestPoint(JComponent first,JComponent second){    if( first == null || second == null ) return null;    Point ps [] = new Point [4];    ps[0] = new Point(first.getX()+first.getWidth()/2,first.getY());//北    ps[1] = new Point(first.getX()+first.getWidth()/2,first.getY()+first.getHeight());//南    ps[2] = new Point(first.getX()+first.getWidth(),first.getY()+first.getHeight()/2);//東    ps[3] = new Point(first.getX(),first.getY()+first.getHeight()/2);//西    //獲得給定圖標的中心點    Point po [] = new Point[4];    po[0] = new Point(second.getX()+second.getWidth()/2,second.getY());//北    po[1] = new Point(second.getX()+second.getWidth()/2,second.getY()+second.getHeight());//南    po[2] = new Point(second.getX()+second.getWidth(),second.getY()+second.getHeight()/2);//東    po[3] = new Point(second.getX(),second.getY()+second.getHeight()/2);//西    return getClosestPoint(ps,po);  }  /**   * 獲得距離最近的兩個點。兩個控件圖標四邊中點的比較，返回距離最近的點   * @param first 畫線的第一個控件圖標（開始圖標）   * @param second 畫線的第二個控件圖標（結束圖標）   * @return Point數組，含有兩個值,Point[0]-->first;Point[1]-->second   *///  public static Point[] getClosestPoint(Bean first,Bean second){//    return getClosestPoint((JComponent)first,(JComponent)second);//  }    /**     * 獲得距離最近的兩個點。所有的點比較     * @param p1 第一組點     * @param p2 第二組點     * @return 距離最近的兩個點     */    public static Point[] getClosestPoint(Point[] p1, Point[] p2){        if( p1 == null || p2 == null ) return null;        Point ret[] = new Point[2];        ret[0] = ret[1] = null;        int mind = Integer.MAX_VALUE , distance;        for(int i = 0; i < p1.length; i++){            for(int j = 0; j < p2.length; j++){                distance = (int)p1[i].distance(p2[j]);                if( distance < mind ){                    ret[0] = p1[i];                    ret[1] = p2[j];                    mind = distance;                }            }        }        return ret;	}    /**     * 開始畫線時，鼠標的坐標和圖標控件坐標(四個邊中點)比較     * @param b 圖標控件     * @param p 鼠標坐標     * @return 最短的距離     */    public static Point[] getClosestPoint(Bean b, Point p){      if(b==null) return null;      Point po [] = new Point[1];      po[0]=p;      Point ps [] = new Point [4];      ps[0] = new Point(b.getX()+b.getWidth()/2,b.getY());//北      ps[1] = new Point(b.getX()+b.getWidth()/2,b.getY()+b.getHeight());//南      ps[2] = new Point(b.getX()+b.getWidth(),b.getY()+b.getHeight()/2);//東      ps[3] = new Point(b.getX(),b.getY()+b.getHeight()/2);//西      return getClosestPoint(ps,po);    }}