public async Task UpdateNavigation(NavigationOperation <TViewModel> navigationOperation, INavigationInProgress navigationInProgress)
{
if (navigationOperation.Pushes.Count == 0 && navigationOperation.Pops.Count == 0)
{
return;
}
var controllersToPush = navigationOperation.Pushes.Select(x => new PushInformation <TViewModel>(_factoryAssociation[x.Screen], x.Instance)).ToList();
foreach (var push in navigationOperation.Pushes)
{
await push.Instance.GetViewModel(""); //TODO: add route here
}
if (navigationInProgress.IsCancelled)
{
Task.Run(async() =>
{
// we wait 10s just in case, shouldn't put too much memory pressure on GC
await Task.Delay(10_000);
foreach (var push in navigationOperation.Pushes)
{
push.Instance.ViewModelInstance?.SafeDispose();
}
}).ConfigureAwait(false);
return;
}
navigationInProgress.Commit();
CrossCurrentActivity.Current.Activity.RunOnUiThread(() => _navigationStack.ApplyActions(navigationOperation.Pops.Count, controllersToPush));
}
public async Task UpdateNavigation(NavigationOperation <TViewModel> navigationOperation, INavigationInProgress navigationInProgress)
{
if (navigationOperation.Pushes.Count == 0 && navigationOperation.Pops.Count == 0)
{
return;
}
var controllersToPush = navigationOperation.Pushes.Select(x => new PushInformation <TViewModel>(_factoryAssociation[x.Screen], x.Instance));
foreach (var push in navigationOperation.Pushes)
{
await push.Instance.GetViewModel(""); //TODO: add route here
}
if (navigationInProgress.IsCancelled)
{
Task.Run(async() =>
{
// we wait 10s just in case, shouldn't put too much memory pressure on GC
await Task.Delay(10_000);
foreach (var push in navigationOperation.Pushes)
{
push.Instance.ViewModelInstance?.SafeDispose();
}
}).ConfigureAwait(false);
return;
}
navigationInProgress.Commit();
UIApplication.SharedApplication.InvokeOnMainThread(() =>
{
var callbackActionWaiter = new CallbackActionWaiter();
callbackActionWaiter.WaitOne();
_navigationStack.EnsureInitialized(_navigationController);
_navigationStack.ApplyActions(navigationOperation.Pops.Count, controllersToPush, callbackActionWaiter);
// lines below could be commented if we encounter issues with viewmodel disposing
callbackActionWaiter.Add(() =>
{
foreach (PopAction <TViewModel> pop in navigationOperation.Pops)
{
pop.Instance.ViewModelInstance?.DispatchSafeDispose();
}
});
Task.Run(async() =>
{
// we wait 10s to let the time for navigation controller animations before disposing content
await Task.Delay(10_000);
UIApplication.SharedApplication.InvokeOnMainThread(callbackActionWaiter.ReleaseOne);
});
});
}
public Task UpdateNavigation(NavigationOperation <SampleViewModel> navigationOperation, INavigationInProgress navigationInProgress)
{
Console.WriteLine($"\tOperations to apply: Pops={navigationOperation.Pops.Count}, Pushes={navigationOperation.Pushes.Count}");
Console.WriteLine("");
navigationInProgress.Commit();
return(Task.CompletedTask);
}
