/// <summary>
/// Remove a handler for the given source's event.
/// </summary>
public static void RemoveHandler(DataSourceProvider source, EventHandler<EventArgs> handler)
{
if (handler == null)
throw new ArgumentNullException("handler");
CurrentManager.ProtectedRemoveHandler(source, handler);
}
/// <summary>Removes the specified listener from the <see cref="E:System.Windows.Data.DataSourceProvider.DataChanged" /> event of the specified source.</summary>
/// <param name="source">The object with the event.</param>
/// <param name="listener">The listener to remove.</param>
// Token: 0x06001B50 RID: 6992 RVA: 0x00080796 File Offset: 0x0007E996
public static void RemoveListener(DataSourceProvider source, IWeakEventListener listener)
{
if (listener == null)
{
throw new ArgumentNullException("listener");
}
DataChangedEventManager.CurrentManager.ProtectedRemoveListener(source, listener);
}
/// <summary>Removes the specified event handler from the specified source.</summary>
/// <param name="source">The source object that the raises the <see cref="E:System.Windows.Data.DataSourceProvider.DataChanged" /> event.</param>
/// <param name="handler">The delegate that handles the <see cref="E:System.Windows.Data.DataSourceProvider.DataChanged" /> event.</param>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="handler" /> is <see langword="null" />.</exception>
// Token: 0x06001B52 RID: 6994 RVA: 0x000807CE File Offset: 0x0007E9CE
public static void RemoveHandler(DataSourceProvider source, EventHandler <EventArgs> handler)
{
if (handler == null)
{
throw new ArgumentNullException("handler");
}
DataChangedEventManager.CurrentManager.ProtectedRemoveHandler(source, handler);
}
//
// Public Methods
//
/// <summary>
/// Add a listener to the given source's event.
/// </summary>
public static void AddListener(DataSourceProvider source, IWeakEventListener listener)
{
if (source == null)
throw new ArgumentNullException("source");
if (listener == null)
throw new ArgumentNullException("listener");
CurrentManager.ProtectedAddListener(source, listener);
}
/// <summary>
/// Remove a listener to the given source's event.
/// </summary>
public static void RemoveListener(DataSourceProvider source, IWeakEventListener listener)
{
/* for app-compat, allow RemoveListener(null, x) - it's a no-op (see Dev10 796788)
if (source == null)
throw new ArgumentNullException("source");
*/
if (listener == null)
throw new ArgumentNullException("listener");
CurrentManager.ProtectedRemoveListener(source, listener);
}
/// <summary>
/// Remove a listener to the given source's event.
/// </summary>
public static void RemoveListener(DataSourceProvider source, IWeakEventListener listener)
{
/* for app-compat, allow RemoveListener(null, x) - it's a no-op
* if (source == null)
* throw new ArgumentNullException("source");
*/
if (listener == null)
{
throw new ArgumentNullException("listener");
}
CurrentManager.ProtectedRemoveListener(source, listener);
}
//
// Public Methods
//
/// <summary>
/// Add a listener to the given source's event.
/// </summary>
public static void AddListener(DataSourceProvider source, IWeakEventListener listener)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
if (listener == null)
{
throw new ArgumentNullException("listener");
}
CurrentManager.ProtectedAddListener(source, listener);
}
private static object UpdateWithNewResult(object arg)
{
object[] args = (object[])arg;
Invariant.Assert(args.Length == 5);
DataSourceProvider provider = (DataSourceProvider)args[0];
Exception error = (Exception)args[1];
object newData = args[2];
DispatcherOperationCallback completionWork
= (DispatcherOperationCallback)args[3];
object callbackArgs = args[4];
provider.UpdateWithNewResult(error, newData, completionWork, callbackArgs);
return(null);
}
// if the root item is a DataSourceProvider, use its Data instead
// and listen for DataChanged events. (Unless overridden explicitly
// by the BindsDirectlyToSource property).
private object DereferenceDataProvider(object item)
{
DataSourceProvider newDataProvider = item as DataSourceProvider;
DataSourceProvider oldDataProvider = DataProvider;
if (newDataProvider != oldDataProvider)
{
// we have a new data provider - retarget the event handler
if (oldDataProvider != null)
{
DataChangedEventManager.RemoveHandler(oldDataProvider, OnDataChanged);
}
DataProvider = newDataProvider;
oldDataProvider = newDataProvider;
if (TraceData.IsExtendedTraceEnabled(this, TraceDataLevel.Activate))
{
TraceData.Trace(TraceEventType.Warning,
TraceData.UseDataProvider(
TraceData.Identify(this),
TraceData.Identify(newDataProvider)));
}
if (newDataProvider != null)
{
DataChangedEventManager.AddHandler(newDataProvider, OnDataChanged);
newDataProvider.InitialLoad();
}
}
return (oldDataProvider != null) ? oldDataProvider.Data : item;
}
public DeferHelper(DataSourceProvider provider)
{
_provider = provider;
}
/// <summary>Stops listening for the <see cref="E:System.Windows.Data.DataSourceProvider.DataChanged" /> event on the specified source.</summary>
/// <param name="source">The source object to stop listening for.</param>
// Token: 0x06001B55 RID: 6997 RVA: 0x0008081C File Offset: 0x0007EA1C
protected override void StopListening(object source)
{
DataSourceProvider dataSourceProvider = (DataSourceProvider)source;
dataSourceProvider.DataChanged -= this.OnDataChanged;
}
public static void RemoveListener(DataSourceProvider source, System.Windows.IWeakEventListener listener)
{
}
void EnsureView(object source, Type collectionViewType)
{
if (_isInitializing || _deferLevel > 0)
{
return;
}
DataSourceProvider dataProvider = source as DataSourceProvider;
// listen for DataChanged events from an DataSourceProvider
if (dataProvider != _dataProvider)
{
if (_dataProvider != null)
{
DataChangedEventManager.RemoveHandler(_dataProvider, OnDataChanged);
}
_dataProvider = dataProvider;
if (_dataProvider != null)
{
DataChangedEventManager.AddHandler(_dataProvider, OnDataChanged);
_dataProvider.InitialLoad();
}
}
// if the source is DataSourceProvider, use its Data instead
if (dataProvider != null)
{
source = dataProvider.Data;
}
// get the view
ICollectionView view = null;
if (source != null)
{
DataBindEngine engine = DataBindEngine.CurrentDataBindEngine;
ViewRecord viewRecord = engine.GetViewRecord(source, this, collectionViewType, true,
(object x) =>
{
BindingExpressionBase beb = BindingOperations.GetBindingExpressionBase(this, SourceProperty);
return((beb != null) ? beb.GetSourceItem(x) : null);
});
if (viewRecord != null)
{
view = viewRecord.View;
_isViewInitialized = viewRecord.IsInitialized;
// bring view up to date with the CollectionViewSource
if (_version != viewRecord.Version)
{
ApplyPropertiesToView(view);
viewRecord.Version = _version;
}
}
}
// update the View property
SetValue(ViewPropertyKey, view);
}
public DeferHelper(DataSourceProvider provider)
{
_provider = provider;
}
public static void RemoveListener(DataSourceProvider source, System.Windows.IWeakEventListener listener)
{
}
/// <summary>
/// Stop listening to the given source for the event.
/// </summary>
protected override void StopListening(object source)
{
DataSourceProvider typedSource = (DataSourceProvider)source;
typedSource.DataChanged -= new EventHandler(OnDataChanged);
}
