Class LayerView<TView, TLayer>
A View that owns a single TLayer struct and delegates
every layout, rendering, and input override to it, passing itself as the fully-typed
TView host to every layer method.
Because the compiler resolves TLayer statically, all delegation is
devirtualised and inlined by the JIT — zero overhead compared to writing the overrides by hand.
Child views: This class is a leaf by default (Count = 0). Subclasses that host child View instances should override Count and this[int], and manage attachment via SetProtectedChild<T>(ref T?, T?). Use ContentLayer to bridge those views back into the layer tree.
public class LayerView<TView, TLayer> : View, ILayerHost, IServiceProvider where TView : View where TLayer : struct, ILayer<TView>Type Parameters
TViewThe concrete view subclass. Must be the class that inherits this. Pass View when no specific host type is needed.
TLayerThe layer struct type.
- Inheritance
-
LayerView<TView, TLayer>
- Implements
- Derived
- Inherited Members
- Extension Methods
Fields
Layer
The layer struct that owns all layout and rendering logic for this view.
protected TLayer LayerField Value
- TLayer
Methods
AnimateCore(TimeSpan, TimeSpan)
Per-frame animation hook. Mutate time-based state and call RequestAnimationFrame() if the animation should continue. The default implementation recurses into children; override to customise child traversal.
protected override void AnimateCore(TimeSpan previousTime, TimeSpan currentTime)Parameters
ArrangeCore(Rect, IMeasureContext)
Positions children within the border-edge rectangle. Frame assignment and alignment offset are handled by ArrangeShell(ref LayoutGuide).
protected override void ArrangeCore(Rect rect, IMeasureContext context)Parameters
rectRectcontextIMeasureContext
MeasureCore(Size, IMeasureContext)
Returns the desired border-edge size given the available border-edge space. Margin, min/max clamping, and fixed-size short-circuit are handled by MeasureShell(ref LayoutGuide).
protected override Size MeasureCore(Size availableSize, IMeasureContext context)Parameters
availableSizeSizecontextIMeasureContext
Returns
OnBlur()
Called when this view loses keyboard focus.
protected override void OnBlur()OnChar(ref KeyEventRef)
Called when a character is input while this view has focus.
public override void OnChar(ref KeyEventRef e)Parameters
OnFocus()
Called when this view receives keyboard focus.
protected override void OnFocus()OnKeyDown(ref KeyEventRef)
Called when a key is pressed while this view has focus.
public override void OnKeyDown(ref KeyEventRef e)Parameters
OnPointerEvent(ref PointerEventRef, EventPhase)
Called during event dispatch to handle a pointer event in a specific event phase.
public override void OnPointerEvent(ref PointerEventRef e, EventPhase phase)Parameters
ePointerEventRefphaseEventPhase
RenderCore(IContext)
Draws this view's content and recurses into children.
protected override void RenderCore(IContext context)Parameters
contextIContext