#include "menu.h"
#include "key.h"
#include "utili.h"
#include "lcd.h"
#include "param.h"
#include "query.h"
#include "time.h"

#include "coulometry.h"
#include "objdetect.h"

//第一層菜單：
struct MENU_ITEM code MainMenu[] = {
	{1,"手動測試",32,2  ,NULL},//coulometry.c
	{2,"自動檢測",32,22 ,NULL},//objdetect.c
	{3,"參數(shù)設(shè)定",32,42 ,NULL},//param.c
	{4,"數(shù)值查詢",32,2  ,NULL},//query.c
	{5,"調(diào)整時間",32,22 ,NULL},//time.c
	{6,"儀器標定",32,42 ,NULL},//
	{0,NULL,0,0,NULL}
};


//菜單控制
uchar MenuItemCount;	//菜單項數(shù), 在初始化一個菜單時計算出來
uchar MenuItemIndex;	//當前指向(是相對本頁)
uchar MenuPageCount;	//菜單頁數(shù), 每頁顯示3項
uchar MenuCurPage;	//當前頁面數(shù). 
uchar MenuCurPageItemCount;//當前頁有幾個菜單項
int8  MenuSelectItem;

//指向當前菜單的指針
struct MENU_ITEM *PrevMenu,*PMenu;

void onMenuKeyDown(uchar key);

void MenuInit()
{
	MenuItemCount = 0;
	MenuItemIndex = 0;
	MenuPageCount = 0;
	MenuCurPage = 0;
	MenuCurPageItemCount = 0;
	MenuSelectItem = -1;
	
	PMenu = NULL;
	PrevMenu = NULL;
}

//反選一個菜單項
void FocusMenuItem(struct MENU_ITEM *item)
{
	uchar len;
	uchar x,w;
	
	//項目名字長度
	len = strlen(item->name);
	
	//控制最小邊界
	if( item->x < 8) 
		x = 0;
	else
		x = item->x -8;
	//控制最大邊界
	if( len + 2 > 16)
		w = 16;
	else 
		w = len + 2;
	//反選一個區(qū)域		
	LCD_ReverseRect(x,item->y-1,w,18);
}

//初始化菜單
void InitMenuItem()
{
	MenuItemCount = 0;
	MenuItemIndex = 0;
	MenuPageCount = 0;
	MenuCurPage = 0;
	MenuCurPageItemCount = 0;
	
	if( PMenu == NULL)
		return;
		
	//計算有幾個菜單項
	while( PMenu[MenuItemCount++].id != 0);

	if( MenuItemCount > 0) MenuItemCount --; //去掉最后一行才正確

	//計算一下需要多少頁
	MenuPageCount = MenuItemCount / PAGE_ITEM_COUNT;
	
	if( MenuPageCount * PAGE_ITEM_COUNT < MenuItemCount) 
		MenuPageCount ++;
	
	RefreshMenu(); //刷新菜單
	
}
//重新加載菜單
void RefreshMenu()
{
	uchar index;
	uchar count;
	
	
	if( PMenu == NULL) 
		return;
	
	LCD_Cls();
	
	MenuCurPageItemCount = 0;
	
	index = MenuCurPage * PAGE_ITEM_COUNT;	//頁面起始項的索引號
	
	count = 0;
	while( PMenu[index].id != 0 && count < PAGE_ITEM_COUNT)
	{
		LCD_PrintHz16(PMenu[index].x,PMenu[index].y,PMenu[index].name);
		MenuCurPageItemCount ++;
		index++;
		count ++;
	}
	
	if( MenuCurPage < (MenuPageCount - 1))
	{
		//如果還有下一頁則顯示">>"
		LCD_PrintHz12(112,52,">>");
	}
	
	if( MenuCurPage > 0)
	{
		//如果不是第一頁則顯示"<<"
		LCD_PrintHz12(0,52,"<<");
	}
	else	//沒有 << 是為退出菜單
	{
		//
		if( PMenu != MainMenu)	//主菜單就沒有退出了
		{
			LCD_PrintHz12(0,52,"<-");
		}
	}
	
	MenuItemIndex = 0;
	
	//反選第一項
	FocusMenuItem(&PMenu[MenuCurPage * PAGE_ITEM_COUNT]);

	//LCD_PrintWord(0,0,MenuCurPage,0,0);
}

//選擇頁面
void SelectMenuPage(bool dir)
{
	if( dir )	//下一頁
	{
		if( MenuCurPage < (MenuPageCount - 1)) 
		{	
			MenuCurPage ++;
			RefreshMenu();
		}
	}
	else
	{
		if( MenuCurPage > 0) 
		{	
			MenuCurPage --;
			RefreshMenu();
		}
		else
		{
			if( PMenu != MainMenu)
			{
				ReturnMainMenu();
			}
		}
	}
}
void MoveMenuItem(bool dir)
{
	uchar FirstItemIndex;
	
	if( PMenu == NULL) 
		return;
		
	//這是當前頁面首個菜單項的索引號
	FirstItemIndex = MenuCurPage * PAGE_ITEM_COUNT;
	
	//取消原來選擇的菜單項
	FocusMenuItem(&PMenu[FirstItemIndex + MenuItemIndex]);
	
	//改變到下一項
	if( dir )
		MenuItemIndex = (MenuItemIndex + 1 ) % MenuCurPageItemCount;
	else
	{
		if( MenuItemIndex == 0)
			MenuItemIndex = MenuCurPageItemCount-1;
		else
			MenuItemIndex = (MenuItemIndex - 1 ) % MenuCurPageItemCount;
	}

	//選擇當前項
	FocusMenuItem(&PMenu[FirstItemIndex + MenuItemIndex]);
}
void SelectMenuItem()
{
	if( PMenu == NULL)
		return;
		
	//這是當前頁面首個菜單項的索引號
	MenuSelectItem = MenuCurPage * PAGE_ITEM_COUNT + MenuItemIndex;
}

void SetMenu(struct MENU_ITEM *p)
{
	//if( p == PMenu)
	//	return;
		
	PrevMenu = PMenu;	//保存一下上一層的菜單
	
	PMenu = p;

	InitMenuItem();

	onKeyUp = onMenuKeyDown;
}
void ReturnBackMenu()	//只能返回到前一層菜單
{
	if( PrevMenu == NULL)
		return;
	PMenu = PrevMenu;

	PrevMenu = NULL;	
	InitMenuItem();
	
	//重置鍵盤映射
	onKeyUp = onMenuKeyDown;
}

//這個是反回主菜單
void ReturnMainMenu()
{
	SetMenu(MainMenu);

	//把按鍵事件設(shè)置為菜單按鍵事件處理函數(shù)
	//onKeyUp = onMenuKeyDown;
}

//處理菜單鍵盤事件
void onMenuKeyDown(uchar key)
{
	switch(key)
	{
	case KEY_UP:
		MoveMenuItem(false); //選擇上一項
		break;
	case KEY_DOWN:
		MoveMenuItem(true);   //選擇下一項
		break;
	case KEY_LEFT:
		SelectMenuPage(false);//向前一頁
		break;
	case KEY_RIGHT:
		SelectMenuPage(true); //向后一頁
		break;
	case KEY_ENTER:
		SelectMenuItem();
		break;
	}
	
} 
//處理菜單命令
void MenuEvent()
{
	if( MenuSelectItem != -1 && PMenu != NULL)
	{		
		if(PMenu[MenuSelectItem].func != NULL)
		{
			PMenu[MenuSelectItem].func(PMenu[MenuSelectItem].id);
		}
		else
		{
			LCD_PrintHz16(24,24,"歡迎使用！");
		}
	}
		
	MenuSelectItem = -1;	
	
}


//