protected void InternalLaunch(ILaunchActivatedEventArgs e)
{
if (e.PreviousExecutionState != ApplicationExecutionState.Running)
{
InitializeFrame(e);
}
//adding a default navigation service
if (!NavigationServices.IsRegistered("Default"))
{
NavigationServices.Register("Default", WindowWrapper.Current().NavigationService);
}
// okay, now handle launch
switch (e.PreviousExecutionState)
{
case ApplicationExecutionState.Terminated:
{
OnStart(StartKind.Launch, e);
SubscribeBackButton();
break;
}
case ApplicationExecutionState.ClosedByUser:
case ApplicationExecutionState.NotRunning:
// launch if not restored
OnStart(StartKind.Launch, e);
SubscribeBackButton();
break;
case ApplicationExecutionState.Running:
OnStart(StartKind.Activate, e);
break;
default:
{
// launch if not restored
OnStart(StartKind.Launch, e);
break;
}
}
}
protected void InitializeFrame(IActivatedEventArgs e)
{
// allow the user to do things, even when restoring
OnInitialize(e);
// create the default frame only if there's nothing already there
// if it is not null, by the way, then the developer injected something & they win
if (Window.Current.Content == null)
{
// build the default frame
var frame = CreateRootFrame(e);
var navigationService = new NavigationService(frame);
navigationService.IsBackButtonEnabled = IsBackButtonEnabled;
Window.Current.Content = navigationService.Frame;
WindowWrapper.Current().NavigationService = navigationService;
}
Window.Current.Activate();
}
/// <summary>
/// This handles all the prelimimary stuff unique to Activated before calling OnStartAsync()
/// This is private because it is a specialized prelude to OnStartAsync().
/// OnStartAsync will not be called if state restore is determined.
/// </summary>
protected void InternalActivatedAsync(IActivatedEventArgs e)
{
// sometimes activate requires a frame to be built
if (Window.Current.Content == null)
{
InitializeFrame(e);
}
//adding a default navigation service
if (!NavigationServices.IsRegistered("Default"))
{
NavigationServices.Register("Default", WindowWrapper.Current().NavigationService);
}
// onstart is shared with activate and launch
OnStart(StartKind.Activate, e);
// ensure active (this will hide any custom splashscreen)
Window.Current.Activate();
}