private async void HandleSuspending(object sender, SuspendingEventArgs e)
{
DebugWrite();
// one, global deferral
var deferral = e.SuspendingOperation.GetDeferral();
using (var session = new Windows.ApplicationModel.ExtendedExecution.ExtendedExecutionSession
{
Description = this.GetType().ToString(),
Reason = Windows.ApplicationModel.ExtendedExecution.ExtendedExecutionReason.SavingData
})
{
try
{
//allow only main view NavigationService as others won't be able to use Dispatcher and processing will stuck
var services = WindowWrapper.ActiveWrappers.SelectMany(x => x.NavigationServices).Where(x => x.IsInMainView);
foreach (INavigationService nav in services)
{
// date the cache (which marks the date/time it was suspended)
nav.FrameFacade.SetFrameState(CacheDateKey, DateTime.Now.ToString());
// call view model suspend (OnNavigatedfrom)
DebugWrite($"Nav.FrameId:{nav.FrameFacade.FrameId}", caller: nameof(nav.SuspendingAsync));
await(nav as INavigationService).GetDispatcherWrapper().DispatchAsync(async() => await nav.SuspendingAsync());
}
// call system-level suspend
DebugWrite($"Calling. OnSuspendingAsync {(OriginalActivatedArgs as LaunchActivatedEventArgs)?.PrelaunchActivated ?? false}", caller: nameof(OnSuspendingAsync));
await OnSuspendingAsync(sender, e, (OriginalActivatedArgs as LaunchActivatedEventArgs)?.PrelaunchActivated ?? false);
}
catch { /* do nothing */ }
finally { deferral.Complete(); }
}
}
public async Task AutoSuspendAllFramesAsync(object sender, SuspendingEventArgs e, bool autoExtendExecutionSession)
{
DebugWrite($"autoExtendExecutionSession: {autoExtendExecutionSession}");
if (autoExtendExecutionSession)
{
using (var session = new Windows.ApplicationModel.ExtendedExecution.ExtendedExecutionSession
{
Description = GetType().ToString(),
Reason = Windows.ApplicationModel.ExtendedExecution.ExtendedExecutionReason.SavingData
})
{
await SuspendAllFramesAsync();
}
}
else
{
await SuspendAllFramesAsync();
}
}
public async Task AutoSuspendAllFramesAsync(BootStrapper bootstrapper, SuspendingEventArgs e)
{
if (!bootstrapper.AutoSuspendAllFrames)
{
return;
}
if (bootstrapper.AutoExtendExecutionSession)
{
using (var session = new Windows.ApplicationModel.ExtendedExecution.ExtendedExecutionSession
{
Description = GetType().ToString(),
Reason = Windows.ApplicationModel.ExtendedExecution.ExtendedExecutionReason.SavingData
})
{
await SuspendAllFramesAsync();
}
}
else
{
await SuspendAllFramesAsync();
}
}
private void Loaded()
{
DebugWrite();
Current = this;
// Hook up keyboard and mouse Back handler
var KeyboardService = Services.KeyboardService.KeyboardService.Instance;
KeyboardService.AfterBackGesture = () =>
{
DebugWrite(caller: nameof(KeyboardService.AfterBackGesture));
var handled = false;
RaiseBackRequested(ref handled);
};
KeyboardService.AfterForwardGesture = () =>
{
DebugWrite(caller: nameof(KeyboardService.AfterForwardGesture));
RaiseForwardRequested();
};
// Hook up the default Back handler
SystemNavigationManager.GetForCurrentView().BackRequested += BackHandler;
Resuming += async(s, e) =>
{
DebugWrite(caller: nameof(Resuming));
if ((OriginalActivatedArgs as LaunchActivatedEventArgs)?.PrelaunchActivated ?? false)
{
OnResuming(s, e, AppExecutionState.Prelaunch);
if (!_HasOnStartAsync)
{
DebugWrite("From OnResume(PreLaunch)", caller: nameof(OnStartAsync));
_HasOnStartAsync = true;
await OnStartAsync(StartKind.Launch, OriginalActivatedArgs);
}
Window.Current.Activate();
}
else
{
OnResuming(s, e, AppExecutionState.Suspended);
}
};
Suspending += async(s, e) =>
{
DebugWrite(caller: nameof(Suspending));
// one, global deferral
var deferral = e.SuspendingOperation.GetDeferral();
using (var session = new Windows.ApplicationModel.ExtendedExecution.ExtendedExecutionSession
{
Description = this.GetType().ToString(),
Reason = Windows.ApplicationModel.ExtendedExecution.ExtendedExecutionReason.SavingData
})
{
try
{
foreach (INavigationService nav in WindowWrapper.ActiveWrappers.SelectMany(x => x.NavigationServices))
{
// date the cache (which marks the date/time it was suspended)
nav.FrameFacade.SetFrameState(CacheDateKey, DateTime.Now.ToString());
// call view model suspend (OnNavigatedfrom)
DebugWrite($"Nav:{nav}", caller: nameof(nav.SuspendingAsync));
await(nav as INavigationService).Dispatcher.DispatchAsync(async() => await nav.SuspendingAsync());
}
// call system-level suspend
DebugWrite($"Calling. Prelaunch {(OriginalActivatedArgs as LaunchActivatedEventArgs)?.PrelaunchActivated ?? false}", caller: nameof(OnSuspendingAsync));
await OnSuspendingAsync(s, e, (OriginalActivatedArgs as LaunchActivatedEventArgs)?.PrelaunchActivated ?? false);
}
catch { /* do nothing */ }
finally { deferral.Complete(); }
}
};
}
