public VirtualCollection(IVirtualCollectionSource <T> source, int pageSize, int cachedPages,
IEqualityComparer <T> equalityComparer)
{
if (pageSize < 1)
{
throw new ArgumentException("pageSize must be bigger than 0");
}
if (equalityComparer == null)
{
throw new ArgumentNullException("equalityComparer");
}
_source = source;
_source.CollectionChanged += HandleSourceCollectionChanged;
_source.CountChanged += HandleCountChanged;
_pageSize = pageSize;
_equalityComparer = equalityComparer;
_virtualItems = CreateItemsCache(pageSize);
_currentItem = -1;
_synchronizationContextScheduler = TaskScheduler.FromCurrentSynchronizationContext();
_mostRecentlyRequestedPages = new MostRecentUsedList <int>(cachedPages);
_mostRecentlyRequestedPages.ItemEvicted += HandlePageEvicted;
(_sortDescriptions as INotifyCollectionChanged).CollectionChanged += HandleSortDescriptionsChanged;
}
public Exporter(Stream stream, IVirtualCollectionSource <ViewableDocument> collectionSource,
IList <ColumnDefinition> columns)
{
this.stream = stream;
this.collectionSource = collectionSource;
this.columns = columns;
}
public VirtualCollection(IVirtualCollectionSource <T> source, int pageSize, int cachedPages)
: this(source, pageSize, cachedPages, EqualityComparer <T> .Default)
{
}
public VirtualCollection(IVirtualCollectionSource source, int pageSize, int cachedPages,
IEqualityComparer <object> equalityComparer)
: this(source, pageSize, cachedPages, equalityComparer, null)
{
}
public VirtualCollection(IVirtualCollectionSource source, int pageSize, int cachedPages, TaskScheduler taskScheduler)
: this(source, pageSize, cachedPages, EqualityComparer <object> .Default, taskScheduler)
{
}
public Exporter(Stream stream, IVirtualCollectionSource<ViewableDocument> collectionSource,
IList<ColumnDefinition> columns)
{
this.stream = stream;
this.collectionSource = collectionSource;
this.columns = columns;
}
