private void initializeFromSources()
{
if (_outerSourceNotifyCollectionChangedEventHandler != null)
{
_outerSource.CollectionChanged -= _outerSourceWeakNotifyCollectionChangedEventHandler.Handle;
_outerSourceNotifyCollectionChangedEventHandler = null;
_outerSourceWeakNotifyCollectionChangedEventHandler = null;
}
if (_innerSourceNotifyCollectionChangedEventHandler != null)
{
_innerSource.CollectionChanged -= _innerSourceWeakNotifyCollectionChangedEventHandler.Handle;
_innerSourceNotifyCollectionChangedEventHandler = null;
_innerSourceWeakNotifyCollectionChangedEventHandler = null;
}
if (_innerSourceAsINotifyPropertyChanged != null)
{
_innerSourceAsINotifyPropertyChanged.PropertyChanged -=
_innerSourceWeakPropertyChangedEventHandler.Handle;
_innerSourceAsINotifyPropertyChanged = null;
_innerSourcePropertyChangedEventHandler = null;
_innerSourceWeakPropertyChangedEventHandler = null;
}
if (_outerSourceAsINotifyPropertyChanged != null)
{
_outerSourceAsINotifyPropertyChanged.PropertyChanged -=
_outerSourceWeakPropertyChangedEventHandler.Handle;
_outerSourceAsINotifyPropertyChanged = null;
_outerSourcePropertyChangedEventHandler = null;
_outerSourceWeakPropertyChangedEventHandler = null;
}
if (_outerSource != null || _innerSource != null)
{
baseClearItems();
}
if (_outerSourceScalar != null)
{
_outerSource = _outerSourceScalar.Value;
}
_outerSourceAsList = (IList <TOuterSourceItem>)_outerSource;
if (_innerSourceScalar != null)
{
_innerSource = _innerSourceScalar.Value;
}
_innerSourceAsList = (IList <TInnerSourceItem>)_innerSource;
if (_outerSource != null && _innerSource != null)
{
_outerSourceAsObservableCollectionWithChangeMarker = _outerSourceAsList as ObservableCollectionWithChangeMarker <TOuterSourceItem>;
if (_outerSourceAsObservableCollectionWithChangeMarker != null)
{
_lastProcessedOuterSourceChangeMarker = _outerSourceAsObservableCollectionWithChangeMarker.ChangeMarkerField;
}
else
{
_outerSourceAsINotifyPropertyChanged = (INotifyPropertyChanged)_outerSource;
_outerSourcePropertyChangedEventHandler = (sender, args) =>
{
if (args.PropertyName == "Item[]")
{
_outerSourceIndexerPropertyChangedEventRaised = true; // ObservableCollection raises this before CollectionChanged event raising
}
};
_outerSourceWeakPropertyChangedEventHandler =
new WeakPropertyChangedEventHandler(_outerSourcePropertyChangedEventHandler);
_outerSourceAsINotifyPropertyChanged.PropertyChanged +=
_outerSourceWeakPropertyChangedEventHandler.Handle;
}
_innerSourceAsObservableCollectionWithChangeMarker = _innerSourceAsList as ObservableCollectionWithChangeMarker <TInnerSourceItem>;
if (_innerSourceAsObservableCollectionWithChangeMarker != null)
{
_lastProcessedInnerSourceChangeMarker = _innerSourceAsObservableCollectionWithChangeMarker.ChangeMarkerField;
}
else
{
_innerSourceAsINotifyPropertyChanged = (INotifyPropertyChanged)_innerSource;
_innerSourcePropertyChangedEventHandler = (sender, args) =>
{
if (args.PropertyName == "Item[]")
{
_innerSourceIndexerPropertyChangedEventRaised = true; // ObservableCollection raises this before CollectionChanged event raising
}
};
_innerSourceWeakPropertyChangedEventHandler =
new WeakPropertyChangedEventHandler(_innerSourcePropertyChangedEventHandler);
_innerSourceAsINotifyPropertyChanged.PropertyChanged +=
_innerSourceWeakPropertyChangedEventHandler.Handle;
}
// ReSharper disable once PossibleNullReferenceException
int outerSourceCount = _outerSourceAsList.Count;
// ReSharper disable once PossibleNullReferenceException
int innerSourceCount = _innerSourceAsList.Count;
int baseIndex = 0;
for (int outerSourceIndex = 0; outerSourceIndex < outerSourceCount; outerSourceIndex++)
{
TOuterSourceItem sourceOuterItem = _outerSourceAsList[outerSourceIndex];
for (int innerSourceIndex = 0; innerSourceIndex < innerSourceCount; innerSourceIndex++)
{
TInnerSourceItem sourceInnerItem = _innerSourceAsList[innerSourceIndex];
JoinPair <TOuterSourceItem, TInnerSourceItem> joinPair = new JoinPair <TOuterSourceItem, TInnerSourceItem>(
sourceOuterItem, sourceInnerItem);
baseInsertItem(baseIndex + innerSourceIndex, joinPair);
}
baseIndex = baseIndex + innerSourceCount;
}
_outerSourceNotifyCollectionChangedEventHandler = handleOuterSourceCollectionChanged;
_outerSourceWeakNotifyCollectionChangedEventHandler =
new WeakNotifyCollectionChangedEventHandler(_outerSourceNotifyCollectionChangedEventHandler);
_outerSource.CollectionChanged += _outerSourceWeakNotifyCollectionChangedEventHandler.Handle;
_innerSourceNotifyCollectionChangedEventHandler = handleInnerSourceCollectionChanged;
_innerSourceWeakNotifyCollectionChangedEventHandler =
new WeakNotifyCollectionChangedEventHandler(_innerSourceNotifyCollectionChangedEventHandler);
_innerSource.CollectionChanged += _innerSourceWeakNotifyCollectionChangedEventHandler.Handle;
}
}
private void initializeFromSources()
{
int originalCount = _items.Count;
if (_sourcesNotifyCollectionChangedEventHandler != null)
{
int itemInfosCount = _itemInfos.Count;
for (int index = 0; index < itemInfosCount; index++)
{
ItemInfo itemInfo = _itemInfos[index];
if (itemInfo.Source != null)
{
itemInfo.Source.CollectionChanged -=
itemInfo.SourceWeakNotifyCollectionChangedEventHandler.Handle;
}
}
int capacity = _sourcesScalar != null?Utils.getCapacity(_sourcesScalar) : Utils.getCapacity(_sources);
_itemInfos = new List <ItemInfo>(capacity);
_sourceRangePositions = new RangePositions <ItemInfo>(_itemInfos);
_sources.CollectionChanged -= _sourcesWeakNotifyCollectionChangedEventHandler.Handle;
_sourcesNotifyCollectionChangedEventHandler = null;
_sourcesWeakNotifyCollectionChangedEventHandler = null;
}
if (_sourcesAsINotifyPropertyChanged != null)
{
_sourcesAsINotifyPropertyChanged.PropertyChanged -=
_sourcesWeakPropertyChangedEventHandler.Handle;
_sourcesAsINotifyPropertyChanged = null;
_sourcesPropertyChangedEventHandler = null;
_sourcesWeakPropertyChangedEventHandler = null;
}
if (_sourcesScalar != null)
{
_sources = _sourcesScalar.Value;
}
_sourcesAsList = (IList)_sources;
if (_sources != null)
{
_sourcesAsIHasChangeMarker = _sourcesAsList as IHasChangeMarker;
if (_sourcesAsIHasChangeMarker != null)
{
_lastProcessedSourcesChangeMarker = _sourcesAsIHasChangeMarker.ChangeMarker;
}
else
{
_sourcesAsINotifyPropertyChanged = (INotifyPropertyChanged)_sourcesAsList;
_sourcesPropertyChangedEventHandler = (sender, args) =>
{
if (args.PropertyName == "Item[]")
{
_indexerPropertyChangedEventRaised = true; // ObservableCollection raises this before CollectionChanged event raising
}
};
_sourcesWeakPropertyChangedEventHandler =
new WeakPropertyChangedEventHandler(_sourcesPropertyChangedEventHandler);
_sourcesAsINotifyPropertyChanged.PropertyChanged +=
_sourcesWeakPropertyChangedEventHandler.Handle;
}
int plainIndex = 0;
int count = _sourcesAsList.Count;
for (int index = 0; index < count; index++)
{
object sourceItemObject = _sourcesAsList[index];
IReadScalar <object> sourceItemScalar = sourceItemObject as IReadScalar <object>;
IList sourceItem = sourceItemScalar != null ? (IList)sourceItemScalar.Value : (IList)sourceItemObject;
int sourceItemCount = sourceItem?.Count ?? 0;
ItemInfo itemInfo = _sourceRangePositions.Add(sourceItemCount);
registerSourceItem(sourceItemObject, itemInfo);
for (int sourceSourceIndex = 0; sourceSourceIndex < sourceItemCount; sourceSourceIndex++)
{
if (originalCount > plainIndex)
{
// ReSharper disable once PossibleNullReferenceException
_items[plainIndex++] = (TSourceItem)sourceItem[sourceSourceIndex];
}
else
{
// ReSharper disable once PossibleNullReferenceException
_items.Insert(plainIndex++, (TSourceItem)sourceItem[sourceSourceIndex]);
}
}
}
for (int index = originalCount - 1; index >= plainIndex; index--)
{
_items.RemoveAt(index);
}
_sourcesNotifyCollectionChangedEventHandler = handleSourcesCollectionChanged;
_sourcesWeakNotifyCollectionChangedEventHandler =
new WeakNotifyCollectionChangedEventHandler(_sourcesNotifyCollectionChangedEventHandler);
_sources.CollectionChanged += _sourcesWeakNotifyCollectionChangedEventHandler.Handle;
}
else
{
_items.Clear();
}
reset();
}
private void initializeFromSource()
{
if (_sourceNotifyCollectionChangedEventHandler != null)
{
_valueStringBuilder.Clear();
int capacity = _sourceScalar != null?Utils.getCapacity(_sourceScalar) : Utils.getCapacity(_source);
_resultRangePositions = new RangePositions <RangePosition>(new List <RangePosition>(capacity * 2));
_source.CollectionChanged -= _sourceWeakNotifyCollectionChangedEventHandler.Handle;
_sourceNotifyCollectionChangedEventHandler = null;
_sourceWeakNotifyCollectionChangedEventHandler = null;
setValue(String.Empty);
}
if (_sourceAsINotifyPropertyChanged != null)
{
_sourceAsINotifyPropertyChanged.PropertyChanged -=
_sourceWeakPropertyChangedEventHandler.Handle;
_sourceAsINotifyPropertyChanged = null;
_sourcePropertyChangedEventHandler = null;
_sourceWeakPropertyChangedEventHandler = null;
}
if (_sourceScalar != null)
{
_source = _sourceScalar.Value;
}
_sourceAsList = (IList <string>)_source;
if (_source != null)
{
_sourceAsObservableCollectionWithChangeMarker = _sourceAsList as ObservableCollectionWithChangeMarker <string>;
if (_sourceAsObservableCollectionWithChangeMarker != null)
{
_lastProcessedSourceChangeMarker = _sourceAsObservableCollectionWithChangeMarker.ChangeMarkerField;
}
else
{
_sourceAsINotifyPropertyChanged = (INotifyPropertyChanged)_sourceAsList;
_sourcePropertyChangedEventHandler = (sender, args) =>
{
if (args.PropertyName == "Item[]")
{
_indexerPropertyChangedEventRaised =
true; // ObservableCollection raises this before CollectionChanged event raising
}
};
_sourceWeakPropertyChangedEventHandler =
new WeakPropertyChangedEventHandler(_sourcePropertyChangedEventHandler);
_sourceAsINotifyPropertyChanged.PropertyChanged += _sourceWeakPropertyChangedEventHandler.Handle;
}
_sourceNotifyCollectionChangedEventHandler = handleSourceCollectionChanged;
_sourceWeakNotifyCollectionChangedEventHandler =
new WeakNotifyCollectionChangedEventHandler(_sourceNotifyCollectionChangedEventHandler);
_source.CollectionChanged += _sourceWeakNotifyCollectionChangedEventHandler.Handle;
recalculateValue();
}
else
{
_valueStringBuilder.Clear();
setValue(String.Empty);
}
}
private void initializeFromSource()
{
if (_sourceNotifyCollectionChangedEventHandler != null)
{
int itemInfosCount = _itemInfos.Count;
for (int index = 0; index < itemInfosCount; index++)
{
ItemInfo itemInfo = _itemInfos[index];
ExpressionWatcher expressionWatcher = itemInfo.ExpressionWatcher;
expressionWatcher.Dispose();
}
int capacity = _sourceScalar != null?Utils.getCapacity(_sourceScalar) : Utils.getCapacity(_source);
_itemInfos = new List <ItemInfo>(capacity);
_sourcePositions = new Positions <ItemInfo>(_itemInfos);
if (_rootSourceWrapper)
{
_sourceAsList.CollectionChanged -= _sourceNotifyCollectionChangedEventHandler;
}
else
{
_sourceAsList.CollectionChanged -= _sourceWeakNotifyCollectionChangedEventHandler.Handle;
_sourceWeakNotifyCollectionChangedEventHandler = null;
}
_sourceNotifyCollectionChangedEventHandler = null;
}
_predicatePassedCount = 0;
if (_sourceScalar != null)
{
_source = _sourceScalar.Value;
}
_sourceAsList = null;
if (_source != null)
{
if (_source is ObservableCollectionWithChangeMarker <TSourceItem> sourceAsList)
{
_sourceAsList = sourceAsList;
_rootSourceWrapper = false;
}
else
{
_sourceAsList = new RootSourceWrapper <TSourceItem>(_source);
_rootSourceWrapper = true;
}
_lastProcessedSourceChangeMarker = _sourceAsList.ChangeMarkerField;
int count = _sourceAsList.Count;
for (int sourceIndex = 0; sourceIndex < count; sourceIndex++)
{
TSourceItem sourceItem = _sourceAsList[sourceIndex];
ItemInfo itemInfo = registerSourceItem(sourceItem, sourceIndex);
if (ApplyPredicate(sourceIndex))
{
_predicatePassedCount++;
itemInfo.PredicateResult = true;
}
}
_sourceNotifyCollectionChangedEventHandler = handleSourceCollectionChanged;
if (_rootSourceWrapper)
{
_sourceAsList.CollectionChanged += _sourceNotifyCollectionChangedEventHandler;
}
else
{
_sourceWeakNotifyCollectionChangedEventHandler =
new WeakNotifyCollectionChangedEventHandler(_sourceNotifyCollectionChangedEventHandler);
_sourceAsList.CollectionChanged += _sourceWeakNotifyCollectionChangedEventHandler.Handle;
}
calculateValue();
}
else
{
if (_value)
{
setValue(false);
}
}
}
private void initializeFromSource()
{
int originalCount = _items.Count;
if (_sourceNotifyCollectionChangedEventHandler != null)
{
int itemInfosCount = _itemInfos.Count;
for (int index = 0; index < itemInfosCount; index++)
{
ItemInfo itemInfo = _itemInfos[index];
ExpressionWatcher expressionWatcher = itemInfo.ExpressionWatcher;
expressionWatcher.Dispose();
}
int capacity = _sourceScalar != null?Utils.getCapacity(_sourceScalar) : Utils.getCapacity(_source);
_filteredPositions = new Positions <Position>(new List <Position>(_initialCapacity));
_itemInfos = new List <ItemInfo>(capacity);
_sourcePositions = new Positions <ItemInfo>(_itemInfos);
if (_rootSourceWrapper)
{
_sourceAsList.CollectionChanged -= _sourceNotifyCollectionChangedEventHandler;
}
else
{
_sourceAsList.CollectionChanged -= _sourceWeakNotifyCollectionChangedEventHandler.Handle;
_sourceWeakNotifyCollectionChangedEventHandler = null;
}
_sourceNotifyCollectionChangedEventHandler = null;
}
if (_sourceScalar != null)
{
_source = _sourceScalar.Value;
}
_sourceAsList = null;
if (_source != null)
{
if (_source is ObservableCollectionWithChangeMarker <TSourceItem> sourceAsList)
{
_sourceAsList = sourceAsList;
_rootSourceWrapper = false;
}
else
{
_sourceAsList = new RootSourceWrapper <TSourceItem>(_source);
_rootSourceWrapper = true;
}
_lastProcessedSourceChangeMarker = _sourceAsList.ChangeMarkerField;
Position nextItemPosition = _filteredPositions.Add();
int count = _sourceAsList.Count;
int insertingIndex = 0;
int sourceIndex;
for (sourceIndex = 0; sourceIndex < count; sourceIndex++)
{
TSourceItem sourceItem = _sourceAsList[sourceIndex];
Position currentFilteredItemPosition = null;
ItemInfo itemInfo = registerSourceItem(sourceItem, sourceIndex, null, null);
if (ApplyPredicate(sourceIndex))
{
if (originalCount > insertingIndex)
{
_items[insertingIndex++] = sourceItem;
}
else
{
_items.Insert(insertingIndex++, sourceItem);
}
currentFilteredItemPosition = nextItemPosition;
nextItemPosition = _filteredPositions.Add();
}
itemInfo.FilteredPosition = currentFilteredItemPosition;
itemInfo.NextFilteredItemPosition = nextItemPosition;
}
for (int index = originalCount - 1; index >= insertingIndex; index--)
{
_items.RemoveAt(index);
}
_sourceNotifyCollectionChangedEventHandler = handleSourceCollectionChanged;
if (_rootSourceWrapper)
{
_sourceAsList.CollectionChanged += _sourceNotifyCollectionChangedEventHandler;
}
else
{
_sourceWeakNotifyCollectionChangedEventHandler =
new WeakNotifyCollectionChangedEventHandler(_sourceNotifyCollectionChangedEventHandler);
_sourceAsList.CollectionChanged += _sourceWeakNotifyCollectionChangedEventHandler.Handle;
}
}
else
{
_items.Clear();
}
reset();
}
private void initializeFromSource(object sender, EventArgs eventArgs)
{
if (_sourceNotifyCollectionChangedEventHandler != null)
{
int count = Count;
for (int i = 0; i < count; i++)
{
TSourceItem sourceItem = _sourceAsList[i];
baseRemoveItem(0);
if (_oldItemProcessor != null)
{
processOldItem(sourceItem);
}
}
if (_rootSourceWrapper)
{
_sourceAsList.CollectionChanged -= _sourceNotifyCollectionChangedEventHandler;
}
else
{
_sourceAsList.CollectionChanged -= _sourceWeakNotifyCollectionChangedEventHandler.Handle;
_sourceWeakNotifyCollectionChangedEventHandler = null;
}
_sourceNotifyCollectionChangedEventHandler = null;
}
if (_sourceScalar != null)
{
_source = _sourceScalar.Value;
}
_sourceAsList = null;
if (_source != null)
{
if (_source is ObservableCollectionWithChangeMarker <TSourceItem> sourceAsList)
{
_sourceAsList = sourceAsList;
_rootSourceWrapper = false;
}
else
{
_sourceAsList = new RootSourceWrapper <TSourceItem>(_source);
_rootSourceWrapper = true;
}
_lastProcessedSourceChangeMarker = _sourceAsList.ChangeMarkerField;
int count = _sourceAsList.Count;
for (int index = 0; index < count; index++)
{
TSourceItem sourceItem = _sourceAsList[index];
if (_newItemProcessor != null)
{
processNewItem(sourceItem);
}
baseInsertItem(index, sourceItem);
}
_sourceNotifyCollectionChangedEventHandler = handleSourceCollectionChanged;
if (_rootSourceWrapper)
{
_sourceAsList.CollectionChanged += _sourceNotifyCollectionChangedEventHandler;
}
else
{
_sourceWeakNotifyCollectionChangedEventHandler =
new WeakNotifyCollectionChangedEventHandler(_sourceNotifyCollectionChangedEventHandler);
_sourceAsList.CollectionChanged += _sourceWeakNotifyCollectionChangedEventHandler.Handle;
}
}
}
private void initializeFromSource()
{
int originalCount = _items.Count;
if (_sourceNotifyCollectionChangedEventHandler != null)
{
if (_destinationDispatcher != null)
{
_destinationDispatcher.Invoke(baseClearItems, this);
}
else
{
_collectionDestinationDispatcher.Invoke(baseClearItems, this, NotifyCollectionChangedAction.Reset, null, null, 0, 0);
}
_source.CollectionChanged -= _sourceWeakNotifyCollectionChangedEventHandler.Handle;
_sourceNotifyCollectionChangedEventHandler = null;
_sourceWeakNotifyCollectionChangedEventHandler = null;
}
if (_sourceAsINotifyPropertyChanged != null)
{
_sourceAsINotifyPropertyChanged.PropertyChanged -=
_sourceWeakPropertyChangedEventHandler.Handle;
_sourceAsINotifyPropertyChanged = null;
_sourcePropertyChangedEventHandler = null;
_sourceWeakPropertyChangedEventHandler = null;
}
if (_sourceScalar != null)
{
_source = _sourceScalar.Value;
}
_sourceAsList = _source as IList <TSourceItem>;
if (_sourceAsList != null)
{
_sourceAsIHasChangeMarker = _sourceAsList as IHasChangeMarker;
if (_sourceAsIHasChangeMarker != null)
{
_lastProcessedSourceChangeMarker = _sourceAsIHasChangeMarker.ChangeMarker;
}
else
{
_sourceAsINotifyPropertyChanged = (INotifyPropertyChanged)_sourceAsList;
_sourcePropertyChangedEventHandler = (sender1, args1) =>
{
if (args1.PropertyName == "Item[]")
{
_indexerPropertyChangedEventRaised =
true; // ObservableCollection raises this before CollectionChanged event raising
}
};
_sourceWeakPropertyChangedEventHandler =
new WeakPropertyChangedEventHandler(_sourcePropertyChangedEventHandler);
_sourceAsINotifyPropertyChanged.PropertyChanged += _sourceWeakPropertyChangedEventHandler.Handle;
}
int count = _sourceAsList.Count;
int sourceIndex;
for (sourceIndex = 0; sourceIndex < count; sourceIndex++)
{
if (originalCount > sourceIndex)
{
_items[sourceIndex] = _sourceAsList[sourceIndex];
}
else
{
_items.Insert(sourceIndex, _sourceAsList[sourceIndex]);
}
}
for (int index = originalCount - 1; index >= sourceIndex; index--)
{
_items.RemoveAt(index);
}
_sourceNotifyCollectionChangedEventHandler = handleSourceCollectionChanged;
_sourceWeakNotifyCollectionChangedEventHandler =
new WeakNotifyCollectionChangedEventHandler(_sourceNotifyCollectionChangedEventHandler);
_source.CollectionChanged += _sourceWeakNotifyCollectionChangedEventHandler.Handle;
}
else
{
_items.Clear();
}
if (_destinationDispatcher != null)
{
_destinationDispatcher.Invoke(reset, this);
}
else
{
_collectionDestinationDispatcher.Invoke(reset, this, NotifyCollectionChangedAction.Reset, null, null, 0, 0);
}
}
private void initializeFromSource()
{
if (_sourceNotifyCollectionChangedEventHandler != null)
{
_source.CollectionChanged -= _sourceWeakNotifyCollectionChangedEventHandler.Handle;
_sourceNotifyCollectionChangedEventHandler = null;
_sourceWeakNotifyCollectionChangedEventHandler = null;
}
if (_sourceAsINotifyPropertyChanged != null)
{
_sourceAsINotifyPropertyChanged.PropertyChanged -=
_sourceWeakPropertyChangedEventHandler.Handle;
_sourceAsINotifyPropertyChanged = null;
_sourcePropertyChangedEventHandler = null;
_sourceWeakPropertyChangedEventHandler = null;
}
if (_sourceScalar != null)
{
_source = _sourceScalar.Value;
}
_sourceAsList = (IList <TSourceItem>)_source;
if (_source != null)
{
_sourceAsObservableCollectionWithChangeMarker = _sourceAsList as ObservableCollectionWithChangeMarker <TSourceItem>;
if (_sourceAsObservableCollectionWithChangeMarker != null)
{
_lastProcessedSourceChangeMarker = _sourceAsObservableCollectionWithChangeMarker.ChangeMarkerField;
}
else
{
_sourceAsINotifyPropertyChanged = (INotifyPropertyChanged)_sourceAsList;
_sourcePropertyChangedEventHandler = (sender, args) =>
{
if (args.PropertyName == "Item[]")
{
_indexerPropertyChangedEventRaised =
true; // ObservableCollection raises this before CollectionChanged event raising
}
};
_sourceWeakPropertyChangedEventHandler =
new WeakPropertyChangedEventHandler(_sourcePropertyChangedEventHandler);
_sourceAsINotifyPropertyChanged.PropertyChanged += _sourceWeakPropertyChangedEventHandler.Handle;
}
_sourceNotifyCollectionChangedEventHandler = handleSourceCollectionChanged;
_sourceWeakNotifyCollectionChangedEventHandler =
new WeakNotifyCollectionChangedEventHandler(_sourceNotifyCollectionChangedEventHandler);
_source.CollectionChanged += _sourceWeakNotifyCollectionChangedEventHandler.Handle;
}
recalculateValue();
}
private void initializeFromSource()
{
int originalCount = _items.Count;
if (_sourceWeakPropertyChangedEventHandler == null)
{
_sourceAsINotifyPropertyChanged = (INotifyPropertyChanged)_sourceAsList;
_sourcePropertyChangedEventHandler = (sender, args) =>
{
if (args.PropertyName == "Item[]")
{
_indexerPropertyChangedEventRaised = true; // ObservableCollection raises this before CollectionChanged event raising
}
};
_sourceWeakPropertyChangedEventHandler = new WeakPropertyChangedEventHandler(_sourcePropertyChangedEventHandler);
_sourceAsINotifyPropertyChanged.PropertyChanged += _sourceWeakPropertyChangedEventHandler.Handle;
}
int count = _sourceAsList.Count;
if (count > 0)
{
int sourceIndex;
for (sourceIndex = 0; sourceIndex < count; sourceIndex++)
{
if (originalCount > sourceIndex)
{
_items[sourceIndex] = _sourceAsList[sourceIndex];
}
else
{
_items.Insert(sourceIndex, _sourceAsList[sourceIndex]);
}
}
for (int index = originalCount - 1; index >= sourceIndex; index--)
{
_items.RemoveAt(index);
}
}
else
{
_items.Clear();
}
if (_sourceWeakNotifyCollectionChangedEventHandler == null)
{
_sourceNotifyCollectionChangedEventHandler = handleSourceCollectionChanged;
_sourceWeakNotifyCollectionChangedEventHandler =
new WeakNotifyCollectionChangedEventHandler(_sourceNotifyCollectionChangedEventHandler);
_source.CollectionChanged += _sourceWeakNotifyCollectionChangedEventHandler.Handle;
}
ChangeMarkerField = !ChangeMarkerField;
this.CheckReentrancy();
this.OnPropertyChanged(Utils.CountPropertyChangedEventArgs);
this.OnPropertyChanged(Utils.IndexerPropertyChangedEventArgs);
this.OnCollectionChanged(Utils.ResetNotifyCollectionChangedEventArgs);
}
