// called by the child XmlBindingWorker when an xml change is detected
// but the identity of raw value has not changed.
internal void OnXmlValueChanged()
{
// treat this as a property change at the top level
object item = PW.GetItem(0);
OnSourcePropertyChanged(item, null);
}
void ReplaceDependencySources()
{
if (!ParentBindingExpression.IsDetaching)
{
int size = PW.Length;
if (PW.NeedsDirectNotification)
{
++size;
}
WeakDependencySource[] newSources = new WeakDependencySource[size];
int n = 0;
if (IsDynamic)
{
for (int k = 0; k < PW.Length; ++k)
{
DependencyProperty dp = PW.GetAccessor(k) as DependencyProperty;
if (dp != null)
{
DependencyObject d = PW.GetItem(k) as DependencyObject;
if (d != null)
{
newSources[n++] = new WeakDependencySource(d, dp);
}
}
}
if (PW.NeedsDirectNotification)
{
// subproperty notifications can only arise from Freezables
// (as of today - 11/14/08), so we only need to propagate
// them when the raw value is a Freezable.
DependencyObject d = PW.RawValue() as Freezable;
if (d != null)
{
newSources[n++] = new WeakDependencySource(d, DependencyObject.DirectDependencyProperty);
}
}
}
ParentBindingExpression.ChangeWorkerSources(newSources, n);
}
}
internal override void UpdateValue(object value)
{
int k = PW.Length - 1;
object item = PW.GetItem(k);
if (item == null || item == BindingExpression.NullDataItem)
{
return;
}
// if the binding is async, post a request to set the value
if (ParentBinding.IsAsync && !(PW.GetAccessor(k) is DependencyProperty))
{
RequestAsyncSetValue(item, value);
return;
}
PW.SetValue(item, value);
}
// called by the child XmlBindingWorker to get the current "result node"
internal object GetResultNode()
{
return(PW.GetItem(0));
}