//------------------------------------------------------
//
// Constructors
//
//------------------------------------------------------
#region Constructors
/// <summary>
/// Constructor
/// </summary>
/// <param name="list">Underlying IList</param>
public ListCollectionView(IList list)
: base(list)
{
if (AllowsCrossThreadChanges)
{
BindingOperations.AccessCollection(list,
() =>
{
ClearPendingChanges();
ShadowCollection = new ArrayList((ICollection)SourceCollection);
_internalList = ShadowCollection;
},
false);
}
else
{
_internalList = list;
}
if (InternalList.Count == 0) // don't call virtual IsEmpty in ctor
{
SetCurrent(null, -1, 0);
}
else
{
SetCurrent(InternalList[0], 0, 1);
}
_group = new CollectionViewGroupRoot(this);
_group.GroupDescriptionChanged += new EventHandler(OnGroupDescriptionChanged);
((INotifyCollectionChanged)_group).CollectionChanged += new NotifyCollectionChangedEventHandler(OnGroupChanged);
((INotifyCollectionChanged)_group.GroupDescriptions).CollectionChanged += new NotifyCollectionChangedEventHandler(OnGroupByChanged);
}
//------------------------------------------------------
//
// Constructors
//
//------------------------------------------------------
#region Constructors
/// <summary>
/// Constructor
/// </summary>
/// <param name="list">Underlying IBindingList</param>
public BindingListCollectionView(IBindingList list)
: base(list)
{
InternalList = list;
_blv = list as IBindingListView;
_isDataView = SystemDataHelper.IsDataView(list);
SubscribeToChanges();
_group = new CollectionViewGroupRoot(this);
_group.GroupDescriptionChanged += new EventHandler(OnGroupDescriptionChanged);
((INotifyCollectionChanged)_group).CollectionChanged += new NotifyCollectionChangedEventHandler(OnGroupChanged);
((INotifyCollectionChanged)_group.GroupDescriptions).CollectionChanged += new NotifyCollectionChangedEventHandler(OnGroupByChanged);
}
//-----------------------------------------------------
//
// Constructors
//
//-----------------------------------------------------
#region Constructors
/// <summary>
/// Constructor
/// </summary>
/// <param name="list">Underlying IList</param>
public ListCollectionView(IList list)
: base(list)
{
_internalList = list;
if (InternalList.Count == 0) // don't call virtual IsEmpty in ctor
{
SetCurrent(null, -1, 0);
}
else
{
SetCurrent(InternalList[0], 0, 1);
}
_group = new CollectionViewGroupRoot(this);
_group.GroupDescriptionChanged += new EventHandler(OnGroupDescriptionChanged);
((INotifyCollectionChanged)_group).CollectionChanged += new NotifyCollectionChangedEventHandler(OnGroupChanged);
((INotifyCollectionChanged)_group.GroupDescriptions).CollectionChanged += new NotifyCollectionChangedEventHandler(OnGroupByChanged);
}
public PagedCollectionView(IEnumerable source, bool isDataSorted, bool isDataInGroupOrder)
{
NotifyCollectionChangedEventHandler handler = null;
this._cachedPageIndex = -1;
this._currentChangedMonitor = new SimpleMonitor();
this._flags = CollectionViewFlags.ShouldProcessCollectionChanged;
this._pageIndex = -1;
if (source == null)
{
throw new ArgumentNullException("source");
}
this._sourceCollection = source;
this.SetFlag(CollectionViewFlags.IsDataSorted, isDataSorted);
this.SetFlag(CollectionViewFlags.IsDataInGroupOrder, isDataInGroupOrder);
this._temporaryGroup = new CollectionViewGroupRoot(this, isDataInGroupOrder);
this._group = new CollectionViewGroupRoot(this, false);
this._group.GroupDescriptionChanged += new EventHandler(this.OnGroupDescriptionChanged);
this._group.GroupDescriptions.CollectionChanged += new NotifyCollectionChangedEventHandler(this.OnGroupByChanged);
this.CopySourceToInternalList();
this._trackingEnumerator = source.GetEnumerator();
if (this._internalList.Count > 0)
{
this.SetCurrent(this._internalList[0], 0, 1);
}
else
{
this.SetCurrent(null, -1, 0);
}
this.SetFlag(CollectionViewFlags.CachedIsEmpty, this.Count == 0);
this._pollForChanges = !(source is INotifyCollectionChanged);
if (!this._pollForChanges)
{
if (handler == null)
{
handler = delegate (object sender, NotifyCollectionChangedEventArgs args) {
this.ProcessCollectionChanged(args);
};
}
(source as INotifyCollectionChanged).CollectionChanged += handler;
}
}
private void PrepareTemporaryGroups()
{
this._temporaryGroup = new CollectionViewGroupRoot(this, this.CheckFlag(CollectionViewFlags.IsDataInGroupOrder));
foreach (GroupDescription description in this._group.GroupDescriptions)
{
this._temporaryGroup.GroupDescriptions.Add(description);
}
this._temporaryGroup.Initialize();
this._isGrouping = false;
if (this._temporaryGroup.GroupDescriptions.Count > 0)
{
int num = 0;
int count = this._internalList.Count;
while (num < count)
{
object objB = this._internalList[num];
if ((objB != null) && (!this.IsAddingNew || !object.Equals(this.CurrentAddItem, objB)))
{
this._temporaryGroup.AddToSubgroups(objB, true);
}
num++;
}
if (this.IsAddingNew)
{
this._temporaryGroup.InsertSpecialItem(this._temporaryGroup.Items.Count, this.CurrentAddItem, true);
}
}
this._isGrouping = this._temporaryGroup.GroupBy != null;
this.PrepareGroupingComparer(this._temporaryGroup);
}
private void PrepareGroupingComparer(CollectionViewGroupRoot groupRoot)
{
if ((groupRoot == this._temporaryGroup) || (this.PageSize == 0))
{
CollectionViewGroupInternal.ListComparer activeComparer = groupRoot.ActiveComparer as CollectionViewGroupInternal.ListComparer;
if (activeComparer != null)
{
activeComparer.ResetList(this.InternalList);
}
else
{
groupRoot.ActiveComparer = new CollectionViewGroupInternal.ListComparer(this.InternalList);
}
}
else if (groupRoot == this._group)
{
groupRoot.ActiveComparer = new CollectionViewGroupInternal.CollectionViewGroupComparer(this._temporaryGroup);
}
}
/// <summary>
/// Sets our group to a new instance of a
/// CollectionViewGroupRoot being passed in
/// and resets the index.
/// </summary>
/// <param name="group">CollectionViewGroupRoot used to compare on</param>
internal void ResetGroup(CollectionViewGroupRoot group)
{
this._group = group;
this._index = 0;
}
/// <summary>
/// Constructor for the CollectionViewGroupComparer that takes
/// in an CollectionViewGroupRoot.
/// </summary>
/// <param name="group">CollectionViewGroupRoot used to compare on</param>
internal CollectionViewGroupComparer(CollectionViewGroupRoot group)
{
this.ResetGroup(group);
}
/// <summary>
/// Create a new instance of this class.
/// </summary>
/// <param name="query">The query providing the results to the collection</param>
/// <param name="pageSize">The number of items to be displayed per page</param>
/// <param name="loadSize">The number of items to be loaded when a page is requested</param>
/// <param name="deferLoad">Whether to defer load</param>
/// <param name="addPrimaryKeySort">Whether the data should be sorted on primary key</param>
/// <remarks>
/// Specify the <paramref name="query"/> which will be executed asynchronously to provide
/// paged results. If the first page should not be immediately loaded set <paramref name="deferLoad"/>
/// to true, and call <see cref="Refresh()"/> when ready to retrieve data.
/// </remarks>
public EntityQueryPagedCollectionView(EntityQuery query, int pageSize, int loadSize, bool deferLoad, bool addPrimaryKeySort) {
SortDescriptions = new SortDescriptionCollection();
GroupDescriptions = new ObservableCollection<GroupDescription>();
if (AnonymousFns.IsAnonymousType(query.ElementType)) {
throw new NotSupportedException("Anonymous types are not currently supported. To work around this limitation, you can instead project into a custom type.");
}
_groupRoot = new CollectionViewGroupRoot(GroupDescriptions);
_baseQuery = query;
_entityManager = query.EntityManager;
if (_entityManager == null) throw new InvalidOperationException("The supplied query must have an assigned EntityManager.");
_pageSize = pageSize < 0 ? 20 : pageSize;
_lookAhead = GetLookAheadCount(_pageSize, loadSize);
_sortByPrimaryKey = addPrimaryKeySort;
_culture = CultureInfo.CurrentCulture;
_innerList = (IList)TypeFns.ConstructGenericInstance(typeof(List<>), query.ElementType);
InitFields();
if (deferLoad) {
_deferredLoadPending = true;
} else {
DoInitialLoad();
}
}
internal void ResetGroup(CollectionViewGroupRoot group)
{
this._group = group;
this._index = 0;
}
// Methods
internal CollectionViewGroupComparer(CollectionViewGroupRoot group)
{
this.ResetGroup(group);
}
