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C/C++ Quellcode

//Includes
#include <stdio.h>
 
//------------------Defines------------------
#define BOOL	char
#define FALSE   0
#define TRUE	(!FALSE)
 
//Number of menu entry
#define STATE_MAINMENU   		10
#define STATE_SUB1MENU   		20
#define STATE_SUB1SUB1MENU   	21
#define STATE_SUB2MENU   		30
 
//Key numbers
#define KEY_NULL				0
#define KEY_ENTER   			1
#define KEY_VORWAERTS			2
#define KEY_RUECKWAERTS			3
 
//------------------Vars------------------
unsigned char state;
 
//Text for the entries
char ITEM_MAINMENU[] = "Hauptmenue\n";
char ITEM_SUB1MENU[] = "1. Untermenue\n";
char ITEM_SUB1SUB1MENU[] = "1. Untermenue im Untermenue\n";
char ITEM_SUB2MENU[] = "2. Untermenue\n";
 
//---------Function prototypes------------
unsigned char StateMachine(char state, unsigned char stimuli);
char Submenu1(char input);
char Submenu2(char input);
char Sub1submenu1(char input);
 
typedef struct
{
	unsigned char state;
	unsigned char input;
	unsigned char nextstate;
} MENU_NEXTSTATE;
 
 
typedef struct
{
	unsigned char state;
	char *pText;
	char (*pFunc)(char input);
} MENU_STATE;
 
 
MENU_NEXTSTATE menu_nextstate[] = {
//  STATE      			  INPUT   		NEXT STATE
{STATE_MAINMENU, 		KEY_ENTER, 		STATE_SUB1MENU},
{STATE_SUB1MENU, 		KEY_ENTER, 		STATE_SUB1SUB1MENU},
{STATE_SUB1MENU, 		KEY_VORWAERTS, 	STATE_SUB2MENU},
{STATE_SUB1MENU, 		KEY_RUECKWAERTS, STATE_MAINMENU},
{STATE_SUB2MENU, 		KEY_RUECKWAERTS, STATE_SUB1MENU},
{STATE_SUB1SUB1MENU, 	KEY_RUECKWAERTS, STATE_SUB1MENU},
{0,                     	0,      		0},
};
 
 
MENU_STATE menu_state[] = {
//  STATE           	STATE TEXT              	STATE_FUNC
{STATE_MAINMENU,   	ITEM_MAINMENU,          	NULL},
{STATE_SUB1MENU,   	ITEM_SUB1MENU,          	Submenu1},
{STATE_SUB1SUB1MENU,   ITEM_SUB1SUB1MENU,      	Sub1submenu1},
{STATE_SUB2MENU,   	ITEM_SUB2MENU,          	Submenu2},
{0,                	NULL,                   	NULL},
};
 
 
void main(void)
 
{
 
	unsigned char nextstate;
	static char *statetext;
	char (*pStateFunc)(char);
	char input=0;
	char i;
 
// Initial state variables
	state = nextstate = STATE_MAINMENU;
	statetext = ITEM_MAINMENU;
	pStateFunc = NULL;
 
 
	for (;;)        	// Main loop
	{
 
        	// Plain menu text
        	if (statetext)
        	{
				printf(statetext);
 
            	statetext = NULL;
        	}
 
 
        	scanf( "%d", &input);
 
 
        	if (pStateFunc)
        	{
            	// When in this state, we must call the state function
           	nextstate = pStateFunc(input);
 
 
}
        	else if (input != KEY_NULL)
        	{
            	// Plain menu, clock the state machine
            	nextstate = StateMachine(state, input);
        	}
 
        	if (nextstate != state)
        	{
            	state = nextstate;
            	for (i=0; menu_state[i].state; i++)
            	{
                	if (menu_state[i].state == state)
                	{
                    	statetext =  menu_state[i].pText;
                    	pStateFunc = menu_state[i].pFunc;
                    	break;
                	}
 
            	}
        	}
    	}
 
 
 
}
 
 
unsigned char StateMachine(char state, unsigned char stimuli)
{
	unsigned char nextstate = state;	// Default stay in same state
	unsigned char i;
 
	for (i=0; menu_nextstate[i].state; i++)
	{
    	if (menu_nextstate[i].state == state && menu_nextstate[i].input == stimuli)
    	{
        	// This is the one!
        	nextstate = menu_nextstate[i].nextstate;
        	break;
    	}
	}
 
	return nextstate;
}
 
 
 
char Submenu1(char input){
 
	static char enter = 1;
 
	if(enter)
	{
    	enter = 0;
 
   printf("la le lu Untermenue 1");
	}
	else if (input == KEY_RUECKWAERTS)
	{
    	enter = 1;
    	return STATE_MAINMENU;
	}
 
	return STATE_SUB1MENU;
 
 
}
 
 
 char Submenu2(char input)
 {
 
	static char enter = 1;
 
	if(enter)
	{
    	enter = 0;
 
   printf("lu lu lu Untermenu 2");
	}
	else if (input == KEY_RUECKWAERTS)
	{
    	enter = 1;
    	return STATE_SUB1MENU;
	}
 
	return STATE_SUB2MENU;
 
 
	 }
 
 char Sub1submenu1(char input)
 {
 
 
	static char enter = 1;
 
	if(enter)
	{
    	enter = 0;
 
   printf("lala le: Unter Untermenu");
	}
	else if (input == KEY_RUECKWAERTS)
	{
    	enter = 1;
    	return STATE_SUB1MENU;
	}
 
	return STATE_SUB1SUB1MENU;
 
	 }