/*
 *	"Menu.h" defines the classe "Menuitem", which replaces the original macros used to
 *	instantiate the menus in the original code.
 */

#ifndef _MENU_H_										// Prevent double include
#define _MENU_H_

#include <Arduino.h>									// Basic Arduino stuff

typedef void (*fptr)( int );							// Functions all take an integer argument

enum { MT_FUNC, MT_MENU, MT_CLOSE, MT_BACK, MT_END };	// Symbols for "type" of menu object


class Menuitem
{
public:

/*
 *	Four constructors; the first just creates a placeholder instance of the object.
 *
 *	The second fills in the "type", button label and callback function address for
 *	"MT_FUNC" type objects.
 *
 *	The third constructor is used for creating "MT_MENU" type objects. Its third
 *	argument is a pointer to a sub-menu to be displayed.
 *
 *	The fourth constructor is used for the "MT_BACK" and "MT_END" type objects where
 *	we need only the type and maybe a label, but no menu or function pointer. Note
 *	that the "text" argument defaults to a NULL pointer for the "MT_END" type
 *	object.
 */

explicit 	Menuitem ();
explicit 	Menuitem ( uint8_t type, const char* text, fptr callback );
explicit 	Menuitem ( uint8_t type, const char* text, Menuitem* submenu );
explicit	Menuitem ( uint8_t type, const char* text = NULL );

void	 	Call ( int num );				// Executes the callback function

const char*	 	Text1 ();						// Returns the button label - line 1
const char*	 	Text2 ();						// Returns the button label - line 2 (or NULL)

uint8_t		Type ();						// Returns the menu item "type"

bool		isMultiline ();					// Returns "true" if a multiline label

Menuitem*	GetSubmenu ();					// For "MT_MENU" type object, returns the sub-menu pointer


private:

void		ParseLabel ( const char* text );		// Parse two line labels


private:									// All the data is private

uint8_t		_type     = -1;					// Menu item type (invalid default)
const char*		_text1    = NULL;				// Label line 1
const char*		_text2    = NULL;				// Label line 2
fptr 		_callback = NULL;				// Address of callback function
Menuitem*	_submenu  = NULL;				// Address of a sub-menu

};

#endif