View — DI (Service Resolution)

View implements IServiceProvider. Services are resolved by walking up the parent chain until a provider returns a non-null result.

GetService

public virtual object? GetService(Type serviceType) =>
    this.Parent?.GetService(serviceType);

The default implementation delegates to the parent. RootView overrides to return this for IFocus and then delegates to Window for everything else. Window in turn can delegate to a platform-provided or DI-scope-provided IServiceProvider.

The generic extension (from Xui.Core.DI) is the preferred call site:

using Xui.Core.DI;

var focus   = this.GetService<IFocus>();
var bitmaps = this.GetService<IBitmapFactory>();

Resolution chain

View.GetService
  → Parent.GetService
      → ... (ancestor chain)
          → RootView.GetService  (returns IFocus)
              → Window.GetService
                  → platform services / DI scope

Registering services

Override GetService in a custom container or host view to inject services scoped to a subtree:

public override object? GetService(Type serviceType)
{
    if (serviceType == typeof(IMyService)) return _myService;
    return base.GetService(serviceType);
}

This is how RootView provides IFocus without any external DI container in Xui.Core.