/// <summary>
/// Constructor. Hooks up the event handler triggered when the timer ticks.
/// </summary>
/// <param name="itemsProvider">The items provider.</param>
/// <param name="pageSize">Size of the page (number of items).</param>
/// <param name="pageTimeout">The page timeout, in milliseconds.</param>
/// <param name="loadCountInterval">The interval between count loads from the database, in milliseconds.</param>
public VirtualizingCollectionDynamicAsync(IVirtualizingCollectionItemsProvider <T> itemsProvider, int pageSize, int pageTimeout, int loadCountInterval)
: base(itemsProvider, pageSize, pageTimeout)
{
this.timer = new Timer(loadCountInterval);
timer.AutoReset = false;
timer.Elapsed += TimerCallback;
itemsProvider.CountChanged += ItemsProvider_CountChanged;
ItemsProvider_CountChanged(null, null);
}
/// <summary>
/// Initializes a new instance of the <see cref="VirtualizingCollectionAsync<T>"/> class.
/// </summary>
/// <param name="itemsProvider">The items provider.</param>
/// <param name="pageSize">Size of the page.</param>
/// <param name="pageTimeout">The page timeout.</param>
public VirtualizingCollectionAsync(IVirtualizingCollectionItemsProvider <T> itemsProvider, int pageSize, int pageTimeout)
: base(itemsProvider, pageSize, pageTimeout)
{
_synchronizationContext = SynchronizationContext.Current;
}
/// <summary>
/// Initializes a new instance of the <see cref="VirtualizingCollection<T>"/> class.
/// </summary>
/// <param name="itemsProvider">The items provider.</param>
/// <param name="pageSize">Size of the page.</param>
public VirtualizingCollection(IVirtualizingCollectionItemsProvider <T> itemsProvider, int pageSize)
{
_itemsProvider = itemsProvider;
_pageSize = pageSize;
}
/// <summary>
/// Initializes a new instance of the <see cref="VirtualizingCollection<T>"/> class.
/// </summary>
/// <param name="itemsProvider">The items provider.</param>
public VirtualizingCollection(IVirtualizingCollectionItemsProvider <T> itemsProvider)
{
_itemsProvider = itemsProvider;
}
/// <summary>
/// Initializes a new instance of the <see cref="VirtualizingCollection<T>"/> class.
/// </summary>
/// <param name="itemsProvider">The items provider.</param>
/// <param name="pageSize">Size of the page.</param>
/// <param name="pageTimeout">The page timeout.</param>
public VirtualizingCollection(IVirtualizingCollectionItemsProvider <T> itemsProvider, int pageSize, int pageTimeout)
{
_itemsProvider = itemsProvider;
_pageSize = pageSize;
_pageTimeout = pageTimeout;
}