pointset.java

java画图程序. 能完成大多数的功能.

/**
 * Created by LHand on May 18th 2007 12:41
 * this class is created for strore and operate dragged poit
 */
package cn.edu.xmu.LHand;
import java.awt.*;
import java.util.ArrayList;
import java.io.Serializable;

public class PointSet implements Serializable{
	//point数组用来存放鼠标Drag过的所有点。点的类型用point
	private ArrayList points;
	
	public PointSet(){
		points = new ArrayList();
	}
	
	public void addPoint(int x, int y){
		int size = points.size();
		if(size > 0){
			Point point = (Point) points.get(size-1);
			if(point.x == x && point.y == y)
				return;
		}
		Point point = new Point(x, y);
		points.add(point);
	}
	
	public int[][] getPoints(){
		int size = points.size();
		if(size == 0)
			return null;
		
		int[][] result = new int[2][size];
		for(int i=0; i<size; i++){
			Point point = (Point) points.get(i);
			result[0][i] = point.x;
			result[1][i] = point.y;
		}
		return result;
	}
	
	public int[][] getPoints(int x, int y){
		int size = points.size();
		if(size == 0)
			return null;
		int[][] result = new int[2][size+1];
        int i;
        for (i=0; i<size; i++) {
            Point p = (Point) points.get(i);
            result[0][i] = p.x;
            result[1][i] = p.y;
        }
        result[0][i] = x;
        result[1][i] = y;
        return result;
	}
	
}