shape.java

基于java rmi的白板

package whiteboard;
import java.awt.*;
import java.io.*;


abstract class shape implements Serializable
{
	
	protected 	Point topleft;
	protected   Point bottomright;
	
	public shape(Point tl,Point br)
	{
		int minX,minY;
		int maxX,maxY;
		int temp;
		
		minX=(int)tl.getX();
		maxX=(int)br.getX();
		if(minX>maxX)
		{
			temp=minX;
			minX=maxX;
			maxX=temp;
		}
		
		minY=(int)tl.getY();
		maxY=(int)br.getY();
		if(minY>maxY)
		{
			temp=minY;
			minY=maxY;
			maxY=temp;
		}		
		topleft=new Point(minX,minY);
		bottomright=new Point(maxX,maxY);
	}
	
	public abstract void draw(Graphics g);
	
	public int top()
	{
		return (int)topleft.getY();
	}
	
	public int left()
	{
		return (int)topleft.getX();
	}
	
	public int width()
	{
		return (int)(bottomright.getX()-topleft.getX());
	}
	
	public int height()
	{
		return 0;
	}
}