Class HostedChildManager

Owns the remount-on-show lifecycle of a composite's hosted children (shared view instances, e.g. menus): registration, mounting (reparent in + prepare) on show, releasing (restore + reparent back) on hide, and reacting to a mounted view re-measuring itself. Extracted from UnityCompositeUiView so the hosting rules are a single testable collaborator the factory wires up, rather than view internals.

Inheritance

object

HostedChildManager

Inherited Members

object.ToString()

object.Equals(object)

object.Equals(object, object)

object.ReferenceEquals(object, object)

object.GetHashCode()

object.GetType()

Namespace: Serenity.Ui.Infrastructure.Views

Assembly: Serenity.UnityUi.Infrastructure.dll

Syntax

public sealed class HostedChildManager

Constructors

HostedChildManager(Func<Transform>, IHostedSizeApplier, Action)

Creates the manager over its host composite's mounting context.

Declaration

public HostedChildManager(Func<Transform> contentRoot, IHostedSizeApplier sizeApplier, Action onHostedResized)

Parameters

Type	Name	Description
Func<Transform>	contentRoot	Provides the transform hosted children are mounted under (deferred — the root is built after the view).
IHostedSizeApplier	sizeApplier	Re-reserves an auto-sized hosted child's slot when it re-measures.
Action	onHostedResized	Invoked after a mounted child re-measures, so the owner can rebuild its scroll layout.

Methods

Register(IViewBase, IHostableView, Transform, UiAnchorType, LayoutSize, bool)

Registers a hosted child for remount-on-show. The instance is left under originalParent at build time and only reparented in when shown, then restored and reparented back when hidden — so it is never trapped under an inactive composite and stays usable on its own.

Declaration

public void Register(IViewBase child, IHostableView hostable, Transform originalParent, UiAnchorType viewAlignment, LayoutSize size, bool parentHorizontal)

Parameters

Type	Name	Description
IViewBase	child	The hosted view instance.
IHostableView	hostable	The hosting hooks for child.
Transform	originalParent	The transform the view is parented under when not hosted (e.g. the canvas).
UiAnchorType	viewAlignment	Where the view is anchored within its slot while hosted.
LayoutSize	size	The CSS-style main-axis size declared for the child's slot.
bool	parentHorizontal	True when the owning composite's layout main axis is horizontal.

TryHide(IViewBase)

Hides child if it is a registered hosted child: drives its real hide sequence and releases it. A hosted child that is not currently mounted here is left alone, so hiding the composite never hides (or steals) a shared instance that is being shown somewhere else.

Declaration

public bool TryHide(IViewBase child)

Parameters

Type	Name	Description
IViewBase	child	The child being hidden.

Returns

Type	Description
bool	True when the child was hosted (and is handled); false when the caller should hide it directly.

TryShow(IViewBase)

Shows child if it is a registered hosted child: mounts it and drives its real show sequence (a bare GameObject activation alone would leave it invisible).

Declaration

public bool TryShow(IViewBase child)

Parameters

Type	Name	Description
IViewBase	child	The child being shown.

Returns

Type	Description
bool	True when the child was hosted (and is now shown); false when the caller should show it directly.