entity.h

1.通过鼠标拖拽和弹出对话框完成实体、属性、联系的绘制以及各参数设定 2.对绘制的实体、属性、联系提供合法性检查 3.对绘制的图形进行拖动、重设大小、删除 4.通过属性对话框对实体、属性、联系的

#ifndef ENTITY_H
#define ENTITY_H
#include "StdAfx.h"
#include "Element.h"
#include "Attribute.h"
class Relation;
class Redata
{
	public:
	Relation* data;
	Redata* next;
	Redata();
};
class MyEntity:public Element
{
public:
	int flag;
	Redata* firstRelation;
	Attribute* firstAttribute;
	
	MyEntity(CString name,int x1,int y1,int x2,int y2,int f);
	void addAttribute(Attribute *a);
	void removeAttribute(Attribute *a);
	void addRelation(Relation *a);
	void removeRelation(Relation *a);
	void serial(CArchive& ar);
	Attribute*  mainkey();
	void emptymain();
	virtual void paint(CDC& g);
	virtual int isDeleted();
	
};
#endif