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Item

Elements with multiples options like radio buttons and keyboard rely on items. So does the single option button.

An item is a structure that combines an index and a 16-character-long label.

struct item
{
    uint16_t index; ///< index 0x1000..0xffff, 0x0000 is reserved for menu root
    char label[16]; ///< text, up to 16 characters
};

Configure

Ensure the GUI library is included and initialised according to the configuration procedure.

item myItem;

The declaration creates an item.

Use

Use setItem() to populate the item.

myItem = setItem(0x0001, "Item");

Alternatively, combine both steps into

item myItem = {0x0001, "Item"};