Function button_menu_add_item 

pub unsafe extern "C" fn button_menu_add_item(
    button_menu: *mut ButtonMenu,
    label: *const c_char,
    index: i32,
    callback: ButtonMenuItemCallback,
    type_: ButtonMenuItemType,
    callback_context: *mut c_void,
) -> *mut ButtonMenuItem

Add item to button menu instance

Arguments

• button_menu - ButtonMenu instance
• label - text inside new button
• index - value to distinct between buttons inside ButtonMenuItemCallback
• callback - The callback
• type - type of button to create. Differ by button drawing. Control buttons have no frames, and have more squared borders.
• callback_context - The callback context

Returns

pointer to just-created item