public Context(
IResolver resolver,
Navigator navigator) : base(resolver)
{
this.navigator = navigator;
this.WhenAnyValue(x => x.SelectedFile)
.Where(f => f != null && !f.IsDirectory)
.Subscribe(ObserveFileSelection);
navigator.WhenOpened()
.Subscribe(ObserveOpening);
// TODO: remove this
var root = navigator.BuildFileTree(Path.GetFullPath(".\\Files"));
navigator.Open(root);
}