protected PageViewModelBase(IStateMachineBase stateMachine, IProvidePageEvents pageEventProvider = null)
{
// Request the global interface type so the code is more share-able.
Machine = stateMachine;
// Also share the page event provider so that derivers know about OnAppearing,
// OnDisappearing, etc.
PageEventProvider = pageEventProvider;
if (PageEventProvider?.GetEventBroadcaster != null)
{
FormsMessengerUtils.Subscribe <PageLifecycleMessage>(this, HandlePageLifecycleChanged);
}
}
