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首先定義一個菜單結(jié)構(gòu)
typedef struct menu//定義一個菜單
{
u8 range_from,range_to; //當前顯示的項開始及結(jié)束序號
u8 itemCount;//項目總數(shù)
u8 selected;//當前選擇項
u8 *menuItems[17];//菜單項目
struct menu **subMenus;//子菜單
struct menu *parent;//上級菜單 ,如果是頂級則為null
void (**func)();//選擇相應項按確定鍵后執(zhí)行的函數(shù) }Menu; Menu MainMenu = { //定義主菜單
0,3,4,0,//默認顯示0-3項，總共4項，當前選擇第0項
{
"設置1 \x10",
"設置2 \x10",
"輸入指令發(fā)送 ",
"查詢 \x10"
}
}; Menu searchMenu = {//查詢菜單
0,3,6,0,
{
"記帳記錄明細 ",
"未采集記錄數(shù) ",
"設備機號 ",
"本機IP地址 ",
"記錄空間大小 ",
"軟件版本 "
}
};
Menu *currentMenu;//當前的菜單
用于顯示菜單項
void display(u8 line) //顯示菜單項并設置選中的項反白
{
int i;
line = 3-(currentMenu->range_to-line);
Lcd_Fill(0x00);
for(i = 0;i<4;i++)
{
Lcd_Disp(i+1,0,currentMenu->menuItems[i+currentMenu->range_from]);
}
highlight(0,line,8,255);//反白顯示指定行
}
void func(void)
{
printf("hello\r\n");
}
初始化菜單:
void initMenu()
{
MainMenu.subMenus = malloc(sizeof(&MainMenu)*4);
MainMenu.subMenus[0] = NULL;//第1到3項沒有子菜單置null,選擇后程序會調(diào)用func中相應項中的函數(shù)
MainMenu.subMenus[1] = NULL;
MainMenu.subMenus[2] = NULL;
MainMenu.subMenus[3] = &searchMenu;//第四項查詢有子菜單
MainMenu.func = malloc(sizeof(&func)*4);
MainMenu.func[0] = NULL;
MainMenu.func[1] = NULL;
MainMenu.func[2] = &func;//當選擇了并按了確定，會執(zhí)行func函數(shù)
MainMenu.func[3] = NULL;
MainMenu.parent = NULL;//表示是頂級菜單
searchMenu.subMenus = malloc(sizeof(&searchMenu)*6);
searchMenu.subMenus[0] = searchMenu.subMenus[1] = searchMenu.subMenus[2] = searchMenu.subMenus[3] = searchMenu.subMenus[4] = searchMenu.subMenus[5] = NULL;
searchMenu.func = malloc(sizeof(&printf)*6);
searchMenu.func[0] = searchMenu.func[2] = searchMenu.func[2] = searchMenu.func[3] = searchMenu.func[4] = searchMenu.func[5] = NULL;
searchMenu.parent = &MainMenu;//上一級菜單是MainMenu.進入查詢子菜單后按返回鍵，將會顯示這個菜單 項
currentMenu = &MainMenu;
}
main
int main(void)
{
delay_init();
uart_init(9600);
Lcd_Init();
KEY_Init();
initMenu();
display(currentMenu->selected);
while(1)
{
key = KEY_Scan();
if(key == 0)
{
delay_ms(10);
continue;
}
printf("key %d is press\r\n",key);
switch(key)
{
case 12://向上
if(currentMenu->selected == 0)//到了第一項
break;
else
{
currentMenu->selected--;
if(currentMenu->selected < currentMenu->range_from)//更新顯示的區(qū)域
{
currentMenu->range_from = currentMenu->selected;
currentMenu->range_to = currentMenu->range_from+3;
}
display(currentMenu->selected);
break;
}
case 8://向下
if(currentMenu->selected == currentMenu->itemCount-1)
break;
else
{
currentMenu->selected++;
if(currentMenu->selected>currentMenu->range_to)
{
currentMenu->range_to = currentMenu->selected;
currentMenu->range_from = currentMenu->range_to-3;
}
display(currentMenu->selected);
break;
}
case 4://Enter鍵
{
if(currentMenu->subMenus[currentMenu->selected] !=NULL)
{
currentMenu = currentMenu->subMenus[currentMenu->selected];
display(0);
}
else
{
if(currentMenu->func[currentMenu->selected] != NULL)
{
currentMenu->func[currentMenu->selected]();//執(zhí)行相應的函數(shù)
display(currentMenu->selected);//返回后恢復原來的菜單狀態(tài)
}
}
break;
}
case 3://返回鍵
{
if(currentMenu->parent!=NULL)//父菜單不為空，將顯示父菜單
{
currentMenu = currentMenu->parent;
display(currentMenu->selected);
}
break;
}
default:
break;
}
delay_ms(10);
}
}
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