diff options
Diffstat (limited to 'Xamarin.Forms.Platform.MacOS/Renderers/ScrollViewRenderer.cs')
| -rw-r--r-- | Xamarin.Forms.Platform.MacOS/Renderers/ScrollViewRenderer.cs | 214 |
1 files changed, 0 insertions, 214 deletions
diff --git a/Xamarin.Forms.Platform.MacOS/Renderers/ScrollViewRenderer.cs b/Xamarin.Forms.Platform.MacOS/Renderers/ScrollViewRenderer.cs deleted file mode 100644 index c41d1d2b..00000000 --- a/Xamarin.Forms.Platform.MacOS/Renderers/ScrollViewRenderer.cs +++ /dev/null @@ -1,214 +0,0 @@ -using System; -using System.ComponentModel; -using AppKit; -using RectangleF = CoreGraphics.CGRect; -using ObjCRuntime; -using Foundation; - -// ReSharper disable UnusedMember.Local -// ReSharper disable UnusedParameter.Local - -namespace Xamarin.Forms.Platform.MacOS -{ - public class ScrollViewRenderer : NSScrollView, IVisualElementRenderer - { - EventTracker _events; - VisualElementTracker _tracker; - ScrollToRequestedEventArgs _requestedScroll; - IVisualElementRenderer _contentRenderer; - - public ScrollViewRenderer() : base(RectangleF.Empty) - { - DrawsBackground = false; - ContentView.PostsBoundsChangedNotifications = true; - NSNotificationCenter.DefaultCenter.AddObserver(this, new Selector(nameof(UpdateScrollPosition)), - BoundsChangedNotification, ContentView); - } - - IScrollViewController Controller => Element as IScrollViewController; - - public VisualElement Element { get; private set; } - - public event EventHandler<VisualElementChangedEventArgs> ElementChanged; - - public SizeRequest GetDesiredSize(double widthConstraint, double heightConstraint) - { - return NativeView.GetSizeRequest(widthConstraint, heightConstraint, 44, 44); - } - - public NSView NativeView => this; - - public void SetElement(VisualElement element) - { - _requestedScroll = null; - var oldElement = Element; - Element = element; - - if (oldElement != null) - { - oldElement.PropertyChanged -= HandlePropertyChanged; - ((IScrollViewController)oldElement).ScrollToRequested -= OnScrollToRequested; - } - - if (element != null) - { - element.PropertyChanged += HandlePropertyChanged; - ((IScrollViewController)element).ScrollToRequested += OnScrollToRequested; - if (_tracker == null) - { - PackContent(); - - _events = new EventTracker(this); - _events.LoadEvents(this); - - _tracker = new VisualElementTracker(this); - _tracker.NativeControlUpdated += OnNativeControlUpdated; - } - - UpdateContentSize(); - UpdateBackgroundColor(); - - OnElementChanged(new VisualElementChangedEventArgs(oldElement, element)); - } - } - - public void SetElementSize(Size size) - { - Xamarin.Forms.Layout.LayoutChildIntoBoundingRegion(Element, - new Rectangle(Element.X, Element.Y, size.Width, size.Height)); - } - - public NSViewController ViewController => null; - - public override void Layout() - { - base.Layout(); - LayoutSubviews(); - } - - protected override void Dispose(bool disposing) - { - if (disposing) - { - if (_tracker == null) - return; - - SetElement(null); - - _tracker.NativeControlUpdated -= OnNativeControlUpdated; - _tracker.Dispose(); - _tracker = null; - - _events.Dispose(); - _events = null; - - ClearContentRenderer(); - - //NSNotificationCenter.DefaultCenter.RemoveObserver(this, BoundsChangedNotification); - } - - base.Dispose(disposing); - } - - void OnElementChanged(VisualElementChangedEventArgs e) - { - ElementChanged?.Invoke(this, e); - } - - void PackContent() - { - ClearContentRenderer(); - - if (Controller.Children.Count == 0 || !(Controller.Children[0] is VisualElement)) - return; - - var content = (VisualElement)Controller.Children[0]; - if (Platform.GetRenderer(content) == null) - Platform.SetRenderer(content, Platform.CreateRenderer(content)); - - _contentRenderer = Platform.GetRenderer(content); - - DocumentView = _contentRenderer.NativeView; - } - - void LayoutSubviews() - { - if (_requestedScroll != null && Superview != null) - { - var request = _requestedScroll; - _requestedScroll = null; - OnScrollToRequested(this, request); - } - } - - void HandlePropertyChanged(object sender, PropertyChangedEventArgs e) - { - if (e.PropertyName == ScrollView.ContentSizeProperty.PropertyName) - UpdateContentSize(); - else if (e.PropertyName == VisualElement.BackgroundColorProperty.PropertyName) - UpdateBackgroundColor(); - } - - void HandleScrollAnimationEnded(object sender, EventArgs e) - { - Controller.SendScrollFinished(); - } - - void HandleScrolled(object sender, EventArgs e) - { - UpdateScrollPosition(); - } - - void OnNativeControlUpdated(object sender, EventArgs eventArgs) - { - UpdateContentSize(); - } - - void OnScrollToRequested(object sender, ScrollToRequestedEventArgs e) - { - if (Superview == null) - { - _requestedScroll = e; - return; - } - - Point scrollPoint = (e.Mode == ScrollToMode.Position) - ? new Point(e.ScrollX, Element.Height - e.ScrollY) - : Controller.GetScrollPositionForElement(e.Element as VisualElement, e.Position); - - (DocumentView as NSView)?.ScrollPoint(scrollPoint.ToPointF()); - - Controller.SendScrollFinished(); - } - - void UpdateBackgroundColor() - { - BackgroundColor = Element.BackgroundColor.ToNSColor(Color.Transparent); - } - - void UpdateContentSize() - { - if (_contentRenderer == null) - return; - var contentSize = ((ScrollView)Element).ContentSize.ToSizeF(); - if (!contentSize.IsEmpty) - _contentRenderer.NativeView.Frame = new RectangleF(0, Element.Height - contentSize.Height, contentSize.Width, - contentSize.Height); - } - - [Export(nameof(UpdateScrollPosition))] - void UpdateScrollPosition() - { - var convertedPoint = (DocumentView as NSView)?.ConvertPointFromView(ContentView.Bounds.Location, ContentView); - if (convertedPoint.HasValue) - Controller.SetScrolledPosition(Math.Max(0, convertedPoint.Value.X), Math.Max(0, convertedPoint.Value.Y)); - } - - void ClearContentRenderer() - { - _contentRenderer?.NativeView?.RemoveFromSuperview(); - _contentRenderer?.Dispose(); - _contentRenderer = null; - } - } -}
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