/// <summary>
/// Initializes a new instance of the <see cref="ItemsRepeater"/> class.
/// </summary>
public ItemsRepeater()
{
_layoutWeakSubscriber = new TargetWeakEventSubscriber <ItemsRepeater, EventArgs>(
this, static (target, _, ev, _) =>
{
if (ev == AttachedLayout.ArrangeInvalidatedWeakEvent)
{
target.InvalidateArrange();
}
else if (ev == AttachedLayout.MeasureInvalidatedWeakEvent)
{
target.InvalidateMeasure();
}
});
_viewManager = new ViewManager(this);
_viewportManager = new ViewportManager(this);
KeyboardNavigation.SetTabNavigation(this, KeyboardNavigationMode.Once);
OnLayoutChanged(null, Layout);
}
/// <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;
_actualTransparencyLevel = PlatformImpl.TransparencyLevel;
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;
}
else
{
// Prevent nullable error.
Renderer = null !;
}
impl.SetInputRoot(this);
impl.Closed = HandleClosed;
impl.Input = HandleInput;
impl.Paint = HandlePaint;
impl.Resized = HandleResized;
impl.ScalingChanged = HandleScalingChanged;
impl.TransparencyLevelChanged = HandleTransparencyLevelChanged;
_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;
FrameSize = impl.FrameSize;
this.GetObservable(PointerOverElementProperty)
.Select(
x => (x as InputElement)?.GetObservable(CursorProperty) ?? Observable.Empty <Cursor>())
.Switch().Subscribe(cursor => PlatformImpl?.SetCursor(cursor?.PlatformImpl));
if (((IStyleHost)this).StylingParent is IResourceHost applicationResources)
{
_resourcesChangesSubscriber = new TargetWeakEventSubscriber <TopLevel, ResourcesChangedEventArgs>(
this, static (target, _, _, e) =>
{
((ILogical)target).NotifyResourcesChanged(e);
});
ResourcesChangedWeakEvent.Subscribe(applicationResources, _resourcesChangesSubscriber);
}
impl.LostFocus += PlatformImpl_LostFocus;
_pointerOverPreProcessor = new PointerOverPreProcessor(this);
_pointerOverPreProcessorSubscription = _inputManager?.PreProcess.Subscribe(_pointerOverPreProcessor);
}