CollectionChangedHandlerTItem, TCollection Class

Class to help implement collection changed events on a data store

Inheritance Hierarchy

SystemObject
  EtoCollectionChangedHandlerTItem, TCollection
    EtoDataStoreChangedHandlerTItem, TCollection
    EtoEnumerableChangedHandlerTItem, TCollection

Namespace: Eto
Assembly: Eto (in Eto.dll) Version: 2.5.3-dev

Syntax

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public abstract class CollectionChangedHandler<TItem, TCollection>
where TCollection : class

Public MustInherit Class CollectionChangedHandler(Of TItem, TCollection As Class)

[<AbstractClassAttribute>]
type CollectionChangedHandler<'TItem, 'TCollection when 'TCollection : not struct> =  class end

Type Parameters

TItem: Type of the items in the collection
TCollection: Type of the collection

The CollectionChangedHandlerTItem, TCollection type exposes the following members.

Constructors

	Name	Description
	CollectionChangedHandlerTItem, TCollection	Initializes a new instance of the CollectionChangedHandlerTItem, TCollection class

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Properties

	Name	Description
	Collection	Gets the collection that this handler is observing
	Count	Gets the count of the items in the current registered collection.

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Methods

	Name	Description
	AddItem	Adds the item to the end of the collection
	AddRange	Adds multiple items to the end of the collection
	ElementAt	Gets the element at the specified index of the current registered collection.
	IndexOf	Gets the index of the specified item
	InsertItem	Inserts an item at the specified index in the collection
	InsertRange	Inserts multiple items to the specified index in the collection
	InternalElementAt	Gets the element at the specified index.
	InternalIndexOf	Gets the index of the item from the collection
	OnRegisterCollection	Called when the object has been registered (attached) to a collection
	OnUnregisterCollection	Called when the object has unregistered the collection
	Register	Registers a specific collection to observe
	RemoveAllItems	Removes all items from the collection
	RemoveItem(Int32)	Removes the item at the specified index
	RemoveItem(TItem)	Removes the specified item
	RemoveRange(IEnumerableTItem)	Removes the specified items from the collection
	RemoveRange(Int32, Int32)	Removes a specified count of items from the collection starting at the specified index
	Reset	Resets the collection when it is dramatically changed
	Unregister	Unregisters the current registered collection

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Remarks

This is used for the platform handler of controls that use collections. This class helps detect changes to a collection so that the appropriate action can be taken to update the UI with the changes. This is a simple helper that is much easier to implement than handling the CollectionChanged event directly.

Reference

Eto Namespace

CollectionChangedHandlerAddLanguageSpecificTextSet("LST1AF87013_0?cs=&lt;|vb=(Of |cpp=&lt;|fs=&lt;'|nu=(");TItem, TCollectionAddLanguageSpecificTextSet("LST1AF87013_1?cs=&gt;|vb=)|cpp=&gt;|fs=&gt;|nu=)"); Class

Type Parameters

Reference

CollectionChangedHandlerTItem, TCollection Class