Class VirtualScrollGroupedNotifyCollectionChangedAdapter<TSectionCollection, TItemCollection>

Namespace

Nalu

Assembly

Nalu.Maui.VirtualScroll.dll

An adapter that wraps a grouped observable collection for use with VirtualScroll.

public class VirtualScrollGroupedNotifyCollectionChangedAdapter<TSectionCollection, TItemCollection> : IVirtualScrollAdapter where TSectionCollection : IList, INotifyCollectionChanged where TItemCollection : IList, INotifyCollectionChanged

Type Parameters

TSectionCollection

The type of the sections' collection.

TItemCollection

The type of the items collection within each section.

Inheritance

object

VirtualScrollGroupedNotifyCollectionChangedAdapter<TSectionCollection, TItemCollection>

Implements

IVirtualScrollAdapter

Derived

VirtualScrollGroupedObservableCollectionAdapter<TSectionCollection, TItem>

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Constructors

VirtualScrollGroupedNotifyCollectionChangedAdapter(TSectionCollection, Func<object, TItemCollection>)

Initializes a new instance of the VirtualScrollGroupedNotifyCollectionChangedAdapter<TSectionCollection, TItemCollection> class.

public VirtualScrollGroupedNotifyCollectionChangedAdapter(TSectionCollection sections, Func<object, TItemCollection> sectionItemsGetter)

Parameters

sections TSectionCollection

The collection of sections.

sectionItemsGetter Func<object, TItemCollection>

A function that extracts the items collection from a section object.

Properties

Sections

The underlying observable collection.

protected TSectionCollection Sections { get; }

Property Value

TSectionCollection

Methods

GetItem(int, int)

Gets the item object for the specified section and item index.

public object? GetItem(int sectionIndex, int itemIndex)

Parameters

sectionIndex int

itemIndex int

Returns

object

GetItemCount(int)

Gets the item count for the specified section.

public int GetItemCount(int sectionIndex)

Parameters

sectionIndex int

Returns

int

GetSection(int)

Gets the section object for the specified section index.

public object? GetSection(int sectionIndex)

Parameters

sectionIndex int

Returns

object

GetSectionCount()

Gets the section count.

public int GetSectionCount()

Returns

int

GetSectionItems(int)

Gets the items collection for the specified section.

protected TItemCollection GetSectionItems(int sectionIndex)

Parameters

sectionIndex int

Returns

TItemCollection

ShouldIgnoreCollectionChanges()

Tells if the adapter should ignore collection changes, therefore not notifying subscribers.

protected virtual bool ShouldIgnoreCollectionChanges()

Returns

bool

Subscribe(Action<VirtualScrollChangeSet>)

Subscribes to change notifications.

public IDisposable Subscribe(Action<VirtualScrollChangeSet> changeCallback)

Parameters

changeCallback Action<VirtualScrollChangeSet>

The callback to invoke when changes occur.

Returns

IDisposable

A disposable that unsubscribes from change notifications when disposed.