/// <summary>
/// Initializes a new instance of the <see cref="TopLevel"/> class.
/// </summary>
/// <param name="impl">The platform-specific window implementation.</param>
/// <param name="dependencyResolver">
/// The dependency resolver to use. If null the default dependency resolver will be used.
/// </param>
public TopLevel(ITopLevelImpl impl, IAvaloniaDependencyResolver dependencyResolver)
{
if (impl == null)
{
throw new InvalidOperationException(
"Could not create window implementation: maybe no windowing subsystem was initialized?");
}
PlatformImpl = impl;
dependencyResolver = dependencyResolver ?? AvaloniaLocator.Current;
var styler = TryGetService <IStyler>(dependencyResolver);
_accessKeyHandler = TryGetService <IAccessKeyHandler>(dependencyResolver);
_inputManager = TryGetService <IInputManager>(dependencyResolver);
_keyboardNavigationHandler = TryGetService <IKeyboardNavigationHandler>(dependencyResolver);
_renderInterface = TryGetService <IPlatformRenderInterface>(dependencyResolver);
_globalStyles = TryGetService <IGlobalStyles>(dependencyResolver);
Renderer = impl.CreateRenderer(this);
if (Renderer != null)
{
Renderer.SceneInvalidated += SceneInvalidated;
}
impl.SetInputRoot(this);
impl.Closed = HandleClosed;
impl.Input = HandleInput;
impl.Paint = HandlePaint;
impl.Resized = HandleResized;
impl.ScalingChanged = HandleScalingChanged;
_keyboardNavigationHandler?.SetOwner(this);
_accessKeyHandler?.SetOwner(this);
if (_globalStyles is object)
{
_globalStyles.GlobalStylesAdded += ((IStyleHost)this).StylesAdded;
_globalStyles.GlobalStylesRemoved += ((IStyleHost)this).StylesRemoved;
}
styler?.ApplyStyles(this);
ClientSize = impl.ClientSize;
this.GetObservable(PointerOverElementProperty)
.Select(
x => (x as InputElement)?.GetObservable(CursorProperty) ?? Observable.Empty <Cursor>())
.Switch().Subscribe(cursor => PlatformImpl?.SetCursor(cursor?.PlatformCursor));
if (((IStyleHost)this).StylingParent is IResourceProvider applicationResources)
{
WeakSubscriptionManager.Subscribe(
applicationResources,
nameof(IResourceProvider.ResourcesChanged),
this);
}
}
public void ApplyStyles(IStyleable control)
{
IVisual visual = control as IVisual;
IStyleHost styleContainer = visual
.GetSelfAndVisualAncestors()
.OfType <IStyleHost>()
.FirstOrDefault();
IGlobalStyles global = PerspexLocator.Current.GetService <IGlobalStyles>();
if (global != null)
{
global.Styles.Attach(control, null);
}
if (styleContainer != null)
{
ApplyStyles(control, styleContainer);
}
}
