package?drawing;

import?java.awt.*;
import?java.io.*;
import?javax.swing.*;
import?java.awt.event.*;
import?java.awt.Graphics;


abstract?class?DrawShape?implements?Serializable
{
	?protected?int?x1y1;?????????????????????//圖形區(qū)域的起始點(diǎn)坐標(biāo)
	?protected?int?x2y2;?????????????????????//圖形區(qū)域的終點(diǎn)坐標(biāo)
	?protected?Color?lineColor;???????????????//圖形的畫線顏色
	?protected?Color?paintColor;??????????????//圖形的填充顏色
	?protected?int?graphicstyle;??????????????//圖形的類型
	?protected?boolean?forever;???????????????//是否為永久圖形
	?protected?Rectangle?rect?=?new?Rectangle（）;???//設(shè)置圖形區(qū)域
	?
	?//方法
	?public?DrawShape（int?xint?y）
	?{???
	?	?this.setLineColor（Color.BLACK）;
	?	?this.setPaintColor（null）;
	?	?this.x1?=?x;
	?	?this.y1?=?y;
	?	?x2?=?x1;
	?	?y2?=?y1;
	?	?//this.setGraphicstyle（GraphicsOps.DRAW_NONE）;
	?}
	?	?
	?//繪制圖形
	?//參數(shù)g表明圖形上下文，filled表明是否進(jìn)行填充????
	?abstract?public?void?draw（Graphics?g）;
	??
	?//獲得畫線顏色
	?public?Color?getLineColor（）
	?{
	?	???return?lineColor;
	?	}
	?
	?//獲得填充色??????????????????????
	?public?Color?getPaintColor（）
	?{
	?	???return?paintColor;
	?	}
	?
	?//設(shè)置畫線顏色
	?public?void?setLineColor（Color?lineColor）
	?{
	?	???this.lineColor?=?lineColor;
	?	}
	?
	?//設(shè)置填充色
	?public?void?setPaintColor（Color?paintColor）
	?{
	?	???this.paintColor?=?paintColor;
	?	}
	?	
	?//設(shè)置圖形類型
	?public?void?setGraphicstyle（int?shapeGraphic）
	?{
	?	???this.graphicstyle?=?shapeGraphic;
	?	}
	?	
	?//設(shè)置圖形為永久圖形
	?public?void?setForever（boolean?b）
	?{
	?	???forever?=?b;
	?	}
	?
	?//判斷圖形是否為永久圖形
	?public?boolean?isForever（）
	?{
	?	??return?forever;
	?	}
	?
	?//設(shè)置圖形的起點(diǎn)
	?public?void?setStart（int?xint?y）
	?{
	?	??this.x1?=?x;
	?	??this.y1?=?y;
	?	}
	?
	?//設(shè)置圖形的終點(diǎn)
	?public?void?setEnd（int?xint?y）
	?{
	?	??this.x2?=?x;
	?	??this.y2?=?y;
	?	}
	?	
	?//得到起點(diǎn)坐標(biāo)
	?public?Point?getStart（）
	?{
	?	?return?new?Point（x1y1）;
	?}
	?
	?//得到圖形的區(qū)域邊界
	?public?Rectangle?getBoundingBox（）
	?{
	?	???rect.width?=?x2>x1???x2-x1?:?x1-x2;
	?	???rect.height?=?y2>y1???y2-y1?:?y1?-?y2;
	?	???rect.x?=?x1	?	???rect.y?=?y1	?	???
	?	???return?rect;
	?	}
}

?????????????????????????/************************
?????????????????????????*????????????????????????
?????????????????????????*?定義繪制2D平面圖形的類
?????????????????????????*
?????????????????????????*************************/
?????????????

//定義畫直線的類
class?DrawLine?extends?DrawShape
{??
	?//構(gòu)造函數(shù)
	?public?DrawLine（int?xint?y）
	?{
	?	???super（xy）;
	?	???
	?	???this.setGraphicstyle（GraphicsOps.DRAW_LINE）;
	?	}
	?//繪圖函數(shù)
	?public?void?draw（Graphics?g）
	?{
	?	??	g.setColor（lineColor）;
	?	????g.drawLine（x1y1x2y2）;
	?}
	?	?
	
}

//定義畫矩形的類
class?DrawRect?extends?DrawShape
{
	??public?DrawRect（int?x?int?y）
	??{
	??????super（xy）;
	??????this.setGraphicstyle（GraphicsOps.DRAW_RECT）;
?????	??
	??}
	??
	??public?void?draw（Graphics?g）
	??{
	??	?int?width?=?x1	??	?int?height?=?y1