73 lines
2.1 KiB
C
73 lines
2.1 KiB
C
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////////////////////////////////////////////////////////////////////////////////////////////////////
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// NoesisGUI - http://www.noesisengine.com
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// Copyright (c) 2013 Noesis Technologies S.L. All Rights Reserved.
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////////////////////////////////////////////////////////////////////////////////////////////////////
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#ifndef __GUI_INOTIFYCOLLECTIONCHANGED_H__
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#define __GUI_INOTIFYCOLLECTIONCHANGED_H__
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#include <NsCore/Noesis.h>
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#include <NsCore/Interface.h>
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#include <NsCore/ReflectionImplementEmpty.h>
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namespace Noesis
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{
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class BaseComponent;
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template<class T> class Delegate;
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/// Describes the action that caused a CollectionChanged even
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enum NotifyCollectionChangedAction: int32_t
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{
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/// An item was added to the collection
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NotifyCollectionChangedAction_Add,
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/// An item was removed from the collection
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NotifyCollectionChangedAction_Remove,
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/// An item was replaced in the collection
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NotifyCollectionChangedAction_Replace,
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/// An item was moved within the collection
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NotifyCollectionChangedAction_Move,
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/// The content of the collection was cleared
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NotifyCollectionChangedAction_Reset,
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/// The content of the collection is going to be cleared
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NotifyCollectionChangedAction_PreReset
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};
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/// Provides data for the CollectionChanged event
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struct NotifyCollectionChangedEventArgs
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{
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NotifyCollectionChangedAction action;
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int oldIndex;
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int newIndex;
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BaseComponent* oldValue;
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BaseComponent* newValue;
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};
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typedef Delegate<void (BaseComponent*, const NotifyCollectionChangedEventArgs&)>
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NotifyCollectionChangedEventHandler;
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////////////////////////////////////////////////////////////////////////////////////////////////////
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/// Notifies listeners of dynamic changes, such as when an item is added and removed or the whole
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/// list is cleared
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////////////////////////////////////////////////////////////////////////////////////////////////////
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NS_INTERFACE INotifyCollectionChanged: public Interface
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{
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/// Occurs when the collection changes
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virtual NotifyCollectionChangedEventHandler& CollectionChanged() = 0;
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NS_IMPLEMENT_INLINE_REFLECTION_(INotifyCollectionChanged, Interface)
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};
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}
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#endif
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