void setupRx()
{
NavigateBack = new ReactiveCommand(
NavigationStack.CountChanged.StartWith(_NavigationStack.Count).Select(x => x > 1));
NavigateBack.Subscribe(_ =>
NavigationStack.RemoveAt(NavigationStack.Count - 1));
Navigate = new NavigationReactiveCommand();
Navigate.Subscribe(x => {
var vm = x as IRoutableViewModel;
if (vm == null)
{
throw new Exception("Navigate must be called on an IRoutableViewModel");
}
NavigationStack.Add(vm);
});
NavigateAndReset = new NavigationReactiveCommand();
NavigateAndReset.Subscribe(x => {
NavigationStack.Clear();
Navigate.Execute(x);
});
CurrentViewModel = Observable.Concat(
Observable.Defer(() => Observable.Return(NavigationStack.LastOrDefault())),
NavigationStack.Changed.Select(_ => NavigationStack.LastOrDefault()));
}
void setupRx()
{
if (rxObjectsSetup)
{
return;
}
NavigateBack = new ReactiveCommand(
NavigationStack.CollectionCountChanged.StartWith(_NavigationStack.Count).Select(x => x > 0));
NavigateBack.Subscribe(_ =>
NavigationStack.RemoveAt(NavigationStack.Count - 1));
Navigate = new NavigationReactiveCommand();
Navigate.Subscribe(x => {
var vm = x as IRoutableViewModel;
if (vm == null)
{
throw new Exception("Navigate must be called on an IRoutableViewModel");
}
NavigationStack.Add(vm);
});
NavigateAndReset = new NavigationReactiveCommand();
NavigateAndReset.Subscribe(x => {
NavigationStack.Clear();
Navigate.Execute(x);
});
rxObjectsSetup = true;
}