C的面向对象化----菜单操作

C语言面向对象程序设计

菜单操作：

要求以键盘上的“<-   ->”左键与右键切换菜单焦点，当用户在焦点处于某菜单死

若敲击键盘上的OK、CANCLE键则调用该焦点菜单对应的处理函数

#include <stdio.h>
#define Menu_Num 3	//菜单数目 

typedef struct tagSysMenu	//菜单类 
{
	char *text;
	int xPos;
	int YPos;
	void (*onOkFun)();
	void (*onCancelFun)();
}SysMenu,*LPSysMenu;

static int currentFocusMenu = 0;	//当前菜单 

void menu1OnOk()
{
	printf("currentFocusMenu is %d, onOkFun\n", currentFocusMenu);
}

void menu2OnOk()
{
	printf("currentFocusMenu is %d, onOkFun\n", currentFocusMenu);
}

void menu3OnOk()
{	
	printf("currentFocusMenu is %d, onOkFun\n", currentFocusMenu);
}

void menu1OnCancel()
{	
	printf("currentFocusMenu is %d, onCancelFun\n", currentFocusMenu);
}

void menu2OnCancel()
{	
	printf("currentFocusMenu is %d, onCancelFun\n", currentFocusMenu);
}

void menu3OnCancel()
{	
	printf("currentFocusMenu is %d, onCancelFun", currentFocusMenu);
}

static SysMenu menu[Menu_Num] = //创建菜单的对象 
{
	{"menu1", 0, 48, menu1OnOk, menu1OnCancel},
	{"menu2", 7, 48, menu2OnOk, menu2OnCancel},
	{"menu3", 14, 48, menu3OnOk, menu3OnCancel},
};

void onOkKey()	//行为，ok 
{
	menu[currentFocusMenu].onOkFun();
}

void OnCancelKey()	//行为，cancel 
{
	menu[currentFocusMenu].onCancelFun();
}

int main(void)
{
	currentFocusMenu = 1;
	onOkKey();	
	currentFocusMenu = 2;
	OnCancelKey();	
}