www.pudn.com > 简单的绘工具.rar > COMMAND.H

#ifndef _Command_h_ 
#define _Command_h_ 
 
#include "POSITION.H" 
 
enum ECommandType	// 命令类 
{ 
	ctUnknown = 0, 
 
//  创建对象命令类 
	ctCreateLine		= 1,	// 创建对象 
	ctCreateRectangle	= 2,	// 创建矩形 
	ctCreateCircle		= 3,	// 创建圆 
	ctCreateArc			= 4,	// 创建圆弧 
	// ...其他创建类型 
 
//  修改命令类 
	ctMove = 11,		// 移动 
	ctRotate = 12,		// 旋转 
	ctMirror = 13		// 镜像 
	// ...其他创建类型 
}; 
 
class CCommand 
{ 
protected: 
	int		m_nStep ; // 命令操作步 
 
public: 
	CCommand() {} 
	~CCommand() {} 
 
	virtual int GetType() = 0;	// 返回命令类型 ECommandType 
	virtual int OnLButtonDown(UINT nFlags, const Position& pos) = 0 ; 
	virtual int OnMouseMove(UINT nFlags, const Position& pos) = 0 ; 
	virtual int OnRButtonDown(UINT nFlags, const Position& pos) = 0 ; 
	virtual int Cancel() = 0 ; 
} ; 
 
 
/////////////////////////////////////////////////////////////// 
/*	 
 *	CCreateLine 
 */ 
class CCreateLine : public CCommand 
{ 
private: 
	Position m_begin;	// 直线的起点 
	Position m_end;		// 直线的终点  
public: 
	CCreateLine() ; 
	~CCreateLine() ; 
 
	int		GetType(); 
	int		OnLButtonDown(UINT nFlags, const Position& pos) ; 
	int		OnMouseMove(UINT nFlags, const Position& pos) ; 
	int		OnRButtonDown(UINT nFlags, const Position& pos) ; 
 
	int		Cancel() ; 
} ; 
 
/////////////////////////////////////////////////////////////// 
/*	 
 *	CCreateRect 
 */ 
class CCreateRect : public CCommand 
{ 
private: 
	Position m_LeftTop; 
	Position m_RightBottom; 
public: 
	CCreateRect() ; 
	~CCreateRect() ; 
 
	int		GetType(); 
	int		OnLButtonDown(UINT nFlags, const Position& pos) ; 
	int		OnMouseMove(UINT nFlags, const Position& pos) ; 
	int		OnRButtonDown(UINT nFlags, const Position& pos) ; 
 
	int		Cancel() ; 
} ; 
 
/////////////////////////////////////////////////////////////// 
/////////////////////////////////////////////////////////////// 
/*	 
 *	CCreateArc 
 */ 
class CCreateArc : public CCommand 
{ 
private: 
	Position m_center; 
	Position m_begin; 
	Position m_end ; 
public: 
	CCreateArc() ; 
	~CCreateArc() ; 
 
	int		GetType(); 
	int		OnLButtonDown(UINT nFlags, const Position& pos) ; 
	int		OnMouseMove(UINT nFlags, const Position& pos) ; 
	int		OnRButtonDown(UINT nFlags, const Position& pos) ; 
 
	int		Cancel() ; 
} ; 
 
class CMove : public CCommand 
{ 
private: 
	Position m_basePos; 
	Position m_desPos; 
public: 
	CMove() ; 
	~CMove() ; 
	 
	int		GetType(); 
	int		OnLButtonDown(UINT nFlags, const Position& pos) ; 
	int		OnMouseMove(UINT nFlags, const Position& pos) ; 
	int		OnRButtonDown(UINT nFlags, const Position& pos) ; 
 
	int		Cancel() ; 
} ; 
 
class CRotate : public CCommand 
{ 
private: 
	Position m_basePos; 
	Position m_desPos; 
public: 
	CRotate() ; 
	~CRotate() ; 
	 
	int		GetType(); 
	int		OnLButtonDown(UINT nFlags, const Position& pos) ; 
	int		OnMouseMove(UINT nFlags, const Position& pos) ; 
	int		OnRButtonDown(UINT nFlags, const Position& pos) ; 
 
	int		Cancel() ; 
} ; 
 
#endif