public NavigationService(EventSystem eventSystem)
{
_eventSystem = eventSystem;
if (Instance != null)
{
throw new InvalidOperationException("NavigationService should only be instantiated once.");
}
Instance = this;
// Ensure to synch Selection property with actual selected object
// just in case the NavigationService was by-passed for changing
// selection (should not happen if we refactor everything properly).
Observable
.EveryUpdate()
.Select(_ => eventSystem.currentSelectedGameObject)
.DistinctUntilChanged()
.Subscribe(SetSelection)
.AddTo(_disposables);
Selection
.PairWithPrevious()
.Subscribe(OnSelectionChanged);
if (Log.IsDebugEnabled)
{
SelectionAndAncestors.Subscribe(x =>
Debug.Log($"Selection: {x.JoinAsString(" > ")}"));
}
}
public void Dispose()
{
Selection.Dispose();
SelectionAndAncestors.Dispose();
_disposables.Dispose();
}
