Oui je m'en doutais, ce n'etait pas tres clair 
Voici un example. J'ai pris le code de demo
/**
* HelloMenu
* by BREVIG http://alexanderbrevig.com
*
* This is the structure of the modelled menu
*
* Settings
* Pin
* Debug
* Options
* Delay (D)
* 100 ms
* 200 ms
* 300 ms
* 400 ms
*/
#include <MenuBackend.h>
//this controls the menu backend and the event generation
MenuBackend menu = MenuBackend(menuUseEvent,menuChangeEvent);
//beneath is list of menu items needed to build the menu
MenuItem settings = MenuItem(menu, "Settings", 1);
MenuItem pin = MenuItem(menu, "Pin", 2);
MenuItem debug = MenuItem(menu, "Debug", 2);
MenuItem options = MenuItem(menu, "Options", 1);
MenuItem setDelay = MenuItem(menu, "Delay",'D', 2);
MenuItem d100 = MenuItem(menu, "100 ms", 3);
MenuItem d200 = MenuItem(menu, "200 ms", 3);
MenuItem d300 = MenuItem(menu, "300 ms", 3);
MenuItem d400 = MenuItem(menu, "400 ms", 3);
//this function builds the menu and connects the correct items together
void menuSetup()
{
Serial.println("Setting up menu...");
//add the file menu to the menu root
menu.getRoot().add(settings);
//setup the settings menu item
settings.addAfter(options);
options.addAfter(settings);
settings.addLeft(settings); //loop back if left on settings
settings.addRight(pin); //chain settings to pin on right
debug.addLeft(settings); //also go to settings left for debug
//we want looping both up and down
pin.addBefore(debug);
pin.addAfter(debug);
debug.addBefore(pin);
debug.addAfter(pin);
options.addLeft(options); //loop back if left on settings
options.addRight(setDelay); //chain options to delay on right
setDelay.addRight(d100);
d100.addBefore(d100); //loop to d400
d100.addAfter(d200);
d200.addAfter(d300);
d300.addAfter(d400);
d400.addAfter(d100); //loop back to d100
//we want left to always be bak to delay
d100.addLeft(setDelay);
d200.addLeft(setDelay);
d300.addLeft(setDelay);
d400.addLeft(setDelay);
}
/*
This is an important function
Here all use events are handled
This is where you define a behaviour for a menu item
*/
void menuUseEvent(MenuUseEvent used)
{
Serial.print("Menu use ");
Serial.println(used.item.getName());
if (used.item.isEqual(setDelay)) //comparison agains a known item
{
Serial.println("menuUseEvent found Delay (D)");
}
}
/*
This is an important function
Here we get a notification whenever the user changes the menu
That is, when the menu is navigated
*/
void menuChangeEvent(MenuChangeEvent changed)
{
Serial.print("Menu change ");
Serial.print(changed.from.getName());
Serial.print(" ");
Serial.println(changed.to.getName());
}
void setup()
{
Serial.begin(9600);
menuSetup();
Serial.println("Starting navigation:\r\nUp: w Down: s Left: a Right: d Use: e");
//fire Delay : menu.use('D');
//bail back to Options by moving up one logical level after a D : menu.moveRelativeLevels(-1);
}
}
Ensuite je me suis dis, ca va etre simple il me suffit de faire ceci:
void function displayOnOledScreen(MenuItem item){
//pseudo code
for(tous les items du meme niveau as currentItem){
si le current == item
print ">>" //pour montrer que c'est celui la selectionné
print le currentItem sur mon ecran oled
}
}
Et j'appelais cette fonction directement dans la fonction menuChangeEvent
Sauf que je me suis appercu qu'il n'est pas simple de recupéré les autres items d'un meme niveau a partir d'un item. Par conséquent ca complique tout et ca oblige a se faire une grosse structure de if ou case alors qu'on a déja toute la structure du menu detaillé dans l'objet "menu". Je trouves que ca duplique un peu le code.
À moins bien sur que je n'ai rien compris... Ce qui est possible aussi