public async Task WhenNavigatingForward_PageNavigatedEventHasCorrectTo()
{
PageNavigatedEventArgs <TestViewModel> args = null;
target.PageNavigated += (s, e) => args = e;
var first = new TestViewModel();
await target.NavigateAsync(first, waitFor : false, ct : CancellationToken.None);
Assert.That(args.To, Is.SameAs(first));
}
public async Task <NavigationDirection> WhenNavigatingBack_PageNavigatedEventHasCorrectDirection(bool isManual)
{
await target.NavigateAsync(new TestViewModel(), waitFor : false, ct : CancellationToken.None);
await target.NavigateAsync(new TestViewModel(), waitFor : false, ct : CancellationToken.None);
PageNavigatedEventArgs <TestViewModel> args = null;
target.PageNavigated += (s, e) => args = e;
await target.GoBackAsync(isManual);
return(args.Direction);
}
public async Task WhenNavigatingBack_PageNavigatedEventHasCorrectTo(bool isManual)
{
var first = new TestViewModel();
await target.NavigateAsync(first, waitFor : false, ct : CancellationToken.None);
await target.NavigateAsync(new TestViewModel(), waitFor : false, ct : CancellationToken.None);
PageNavigatedEventArgs <TestViewModel> args = null;
target.PageNavigated += (s, e) => args = e;
await target.GoBackAsync(isManual);
Assert.That(args.To, Is.SameAs(first));
}
void ViewModel_PageNavigated(object sender, PageNavigatedEventArgs <PageViewModel> e)
{
switch (e.Direction)
{
case NavigationDirection.Forward:
UpdateViewController(e.To);
break;
case NavigationDirection.ManualBack:
isManualBack = true;
try
{
PopViewController(animated: true);
}
finally
{
isManualBack = false;
}
break;
}
Console.WriteLine($"NavigationController stack depth after navigation {ViewControllers.Length}");
}
void NavigationService_PageNavigated(object sender, PageNavigatedEventArgs <PageViewModel> e)
{
UpdateFragment(isBack: e.Direction.IsBack(), isAnimated: true);
}
private void NavigationService_PageNavigated(object sender, PageNavigatedEventArgs <PageViewModel> e)
{
CurrentPage = e.To;
}
