/// <summary>
/// Call this protected .ctor to indicate that the subclass implements IVirtualListLoader<T>
/// </summary>
protected VirtualList()
: this(null)
{
if (!(this is IVirtualListLoader <T>))
{
throw new InvalidCastException(string.Format("This class of type `{0}` must implement IVirtualListLoader<T> to use this .ctor", GetType().Name));
}
_loader = (IVirtualListLoader <T>) this;
}
public VirtualList(IVirtualListLoader <T> loader, int pageSize, SynchronizationContext synchronizationContext)
{
if (loader == null)
{
throw new ArgumentNullException("loader");
}
if (pageSize <= 0)
{
throw new ArgumentOutOfRangeException("pageSize");
}
_synchronizationContext = synchronizationContext;
_pageRequests = new QueuedBackgroundWorker <int>(LoadPage, synchronizationContext);
_pageRequests.StateChanged += new EventHandler(OnPageRequestsStateChanged);
_version++;
_loader = loader;
_pageSize = pageSize;
LoadAsync(0);
}
public VirtualList(IVirtualListLoader <T> loader, int pageSize, SynchronizationContext synchronizationContext)
{
//EventMessageBus.Current.GetEvent<EntityRangeLoaded<T>>(Source)
// .Subscribe(x => handleRangeLoaded(x.Entities,x.StartIndex, x.OverAllCount, x.Process as ISystemProcess));
if (loader == null)
{
throw new ArgumentNullException("loader");
}
if (pageSize <= 0)
{
throw new ArgumentOutOfRangeException("pageSize");
}
_synchronizationContext = synchronizationContext;
_pageRequests = new QueuedBackgroundWorker <int>(LoadPage, synchronizationContext);
_pageRequests.StateChanged += new EventHandler(OnPageRequestsStateChanged);
_version++;
_loader = loader;
_pageSize = pageSize;
LoadAsync(0);
}
public VirtualList(IVirtualListLoader <T> loader, SynchronizationContext synchronizationContext)
: this(loader, DefaultPageSize, synchronizationContext)
{
}
public VirtualList(IVirtualListLoader <T> loader)
: this(loader, DefaultPageSize, SynchronizationContext.Current)
{
}
