HamburgerMenuViewModel Documentation

1. Purpose

HamburgerMenuViewModel is a Prism/Unity-based ViewModel that manages a hamburger menu's context menu construction, UI state (enabled/busy states), and event-driven communication within the application. It serves as the presentation logic layer for IHamburgerMenuView, handling menu item configuration, notification popups, and test lifecycle state changes via event aggregation. The class is designed as a shared singleton via MEF's [PartCreationPolicy(CreationPolicy.Shared)].

2. Public Interface

Constructor

public HamburgerMenuViewModel(
    IHamburgerMenuView view, 
    IRegionManager regionManager,
    IEventAggregator eventAggregator, 
    IUnityContainer unityContainer)

Initializes the ViewModel, sets the View's DataContext, creates interaction requests, and subscribes to three events: RaiseNotification, BusyIndicatorChangeNotification, and TestEvent.

Properties

Property	Type	Access
`View`	`IHamburgerMenuView`	get/set
`NotificationRequest`	`InteractionRequest<Notification>`	get
`ConfirmationRequest`	`InteractionRequest<Confirmation>`	get
`IsEnabled`	`bool`	get; private set
`IsBusy`	`bool`	get; set
`IsDirty`	`bool`	get; private set
`IsMenuIncluded`	`bool`	get; set
`IsNavigationIncluded`	`bool`	get; set
`MenuItemPressed`	`MenuItemPressedDelegate`	get; set

Methods

public ContextMenu GetContextMenu()

Returns the cached ContextMenu, building it lazily on first access. Thread-safe via lock on MyLock.

public void SetMenuItems(string[] items)

Replaces the current menu items array and rebuilds the context menu. Empty or whitespace items

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