#define Null 0


/*********************** 
* 函數(shù)聲明 * 
***********************/ 
void ShowMenu(void);
void Menu_Change(unsigned char KeyNum);

/*********************** 
* 按鍵功能鍵宏定義 * 
***********************/ 
#define UP		   	'3'
#define Down		'7'
#define Esc			'B'
#define Enter		'F'
#define Reset		'0'


/********************** 
* 目錄結(jié)構(gòu)體定義 * 
**********************/ 
struct MenuItem
{ 
unsigned char MenuCount; 		//當(dāng)前層節(jié)點數(shù)
unsigned char *DisplayString; 	//菜單標(biāo)題
void (*Subs)(); 			  	//節(jié)點函數(shù)
struct MenuItem *ChildrenMenus; //子節(jié)點
struct MenuItem *ParentMenus; 	//父節(jié)點
}; 

/*********************** 
* 調(diào)用子函數(shù)區(qū) * 
***********************/ 
void NullSubs(void) 
{ 
}
//----------------------以下為例子,請根據(jù)實際情況修改---------------------------

void TimeSet(void)
{
// put_s("TimeSet");
}

void DateSet(void)
{
//put_s("DateSet");
}

void AlertSet (void)
{
//put_s("AlertSet");
}
//------------------------------------------------------------------------------






/*********************** 
* 結(jié)構(gòu)體區(qū) * 
***********************/ 
//----------------------以下為例子,請根據(jù)實際情況修改---------------------------
struct MenuItem TimeMenu[4];
struct MenuItem FlashMenu[5];
struct MenuItem VoiceMenu[5];
struct MenuItem RobotMenu[5];
struct MenuItem MainMenu[5];

struct MenuItem TimeMenu[4]=
{  //MenuCount		 DisplayString			 Subs				ChildrenMenus		ParentMenus
	 {4, 			 "1.Time Set",			 TimeSet,			Null,				MainMenu},
	 {4,			 "2.Date Set",		 	 DateSet,			Null,				MainMenu},
	 {4,			 "3.AlertSet",		 	 AlertSet,			Null,				MainMenu},
	 {4,  			 "4.Back",		 		 NullSubs,			MainMenu,			MainMenu},
};	

struct MenuItem FlashMenu[5]=
{  //MenuCount		 DisplayString			 Subs				ChildrenMenus		ParentMenus
	 {5, 			 "1.Flash Record",		 NullSubs,			Null,				MainMenu},
	 {5,			 "2.Play",		 	 	 NullSubs,			Null,				MainMenu},
	 {5,			 "3.Pause",		 	 	 NullSubs,			Null,				MainMenu},
	 {5,  			 "4.Flash Delete",		 NullSubs,			Null,				MainMenu},
	 {5,			 "5.Back",				 NullSubs,			MainMenu,			MainMenu},
};	 

struct MenuItem VoiceMenu[5]=
{  //MenuCount		 DisplayString			 Subs				ChildrenMenus		ParentMenus
	 {5, 			 "1.Voice Record"	,	 NullSubs,			Null,				MainMenu},
	 {5,			 "2.Play",		 	 	 NullSubs,			Null,				MainMenu},
	 {5,			 "3.Pause",		 	     NullSubs,			Null,				MainMenu},
	 {5,  			 "4.Voice Delete",		 NullSubs,			Null,				MainMenu},
 	 {5,			 "5.Back",				 NullSubs,			MainMenu,			MainMenu},
};	 

struct MenuItem RobotMenu[5]=
{  //MenuCount		 DisplayString			 Subs				ChildrenMenus		ParentMenus
	 {5, 			 "1.Turn Left",		 	 NullSubs,			Null,				MainMenu},
	 {5,			 "2.Turn Right",		 NullSubs,			Null,				MainMenu},
	 {5,			 "3.Go Ahead",		 	 NullSubs,			Null,				MainMenu},
	 {5,  			 "4.Go Back",		 	 NullSubs,			Null,				MainMenu},
	 {5,			 "5.Back",				 NullSubs,			MainMenu,			MainMenu},
};	 


struct MenuItem MainMenu[5]=
{  //MenuCount		 DisplayString			 Subs				ChildrenMenus		ParentMenus
	 {5, 			 "1.Time Set"	,		 NullSubs,			TimeMenu,			Null},
	 {5,			 "2.Voice Center",		 NullSubs,			VoiceMenu,			Null},
	 {5,			 "3.Robot Control",		 NullSubs,			RobotMenu,			Null},
	 {5,  			 "4.Flash Option",		 NullSubs,			FlashMenu,			Null},
 	 {5,			 "5.Back",				 NullSubs,			MainMenu,			MainMenu},
};	
//------------------------------------------------------------------------------






/*********************** 
* 全局變量聲明區(qū) * 
***********************/ 
struct MenuItem (*MenuPoint) = MainMenu; //結(jié)構(gòu)體指針,指向結(jié)構(gòu)體后由內(nèi)部函數(shù)指針指向功能函數(shù)
unsigned char DisplayStart = 0; //顯示時的第一個菜單項
unsigned char UserChoose = 0;  	//用戶所選菜單項
unsigned char DisplayPoint = 0; //顯示指針
unsigned MaxItems; 		   	 	//同級最大菜單數(shù)
unsigned char ShowCount=2;		//同屏顯示菜單數(shù)


/*********************** 
*顯示函數(shù)區(qū) * 
***********************/ 
void ShowMenu(void) 
{
 	 unsigned char n;
	 MaxItems = MenuPoint[0].MenuCount;//定義最大同級菜單
	 DisplayPoint = DisplayStart;
	 for(n=0;DisplayPoint<MaxItems&&n<ShowCount;n++) 
	 	{if(DisplayPoint==UserChoose)
		 		LCD_write_string(0,n,"->");
		 LCD_write_string(2,n,MenuPoint[DisplayPoint++].DisplayString);
		 
	 	}

}

void Menu_Change(unsigned char KeyNum)
{
		if(KeyNum)
		{
		   switch(KeyNum) 
		   {		    
		   				case UP: 
							 UserChoose --; 
							 if (UserChoose ==255)
							 { 
							   	UserChoose = 0;//上翻截至,如果要回滾賦值MaxItems-1
							 } 
							 break; 
						case Esc: 
							 if (MenuPoint[UserChoose].ParentMenus != Null) 
							 { 
							   	MenuPoint = MenuPoint[UserChoose].ParentMenus; 
								UserChoose = 0; 
								DisplayStart = 0; 
							} 
							break; 
						case Down: 
							 UserChoose ++; 
							 if (UserChoose == MaxItems) 
							 { 
							   UserChoose = MaxItems-1;//下翻截至,如要回滾賦值為0 
							 } 
							 break; 
						case Enter: 
							 if (MenuPoint[UserChoose].Subs != NullSubs) 
							 { 
							   (*MenuPoint[UserChoose].Subs)(); 
							 } 
							 else if (MenuPoint[UserChoose].ChildrenMenus != Null) 
							 { 
							   MenuPoint = MenuPoint[UserChoose].ChildrenMenus; 
							   UserChoose = 0; 
							   DisplayStart = 0; 
							 } 
							 break; 
					   case Reset: 
					   		MenuPoint = MainMenu; 
							UserChoose = 0; 
							DisplayStart = 0; 
							break; 
					   default:break;
			}
			if (UserChoose%ShowCount==0)           //一屏只能顯示ShowCount行
			  DisplayStart = UserChoose;
			else if(UserChoose==1||UserChoose== 3)
			   DisplayStart = UserChoose-1;		   //實現(xiàn)滾屏的關(guān)鍵				 
			LCD_write_command(0x01);			   //液晶清屏,根據(jù)不同液晶函數(shù)自行修改
			delay_nms(5);						   //液晶為慢速器件
			ShowMenu(); 
		}
}