internal override void OnDetached(DependencyObject element)
{
if (IsAttached)
{
base.OnDetached(element);
if (PropertyListener != null)
{
PropertyListener.Detach();
PropertyListener = null;
}
PropertyPathWalker.Update(null);
Target = null;
}
}
internal void OnDetached(DependencyObject element)
{
if (IsAttached)
{
this.IsAttached = false;
this.OnDataContextChanged(null);
if (PropertyListener != null)
{
PropertyListener.Detach();
PropertyListener = null;
}
PropertyPathWalker.Update(null);
Target = null;
}
}
internal void OnDetached(DependencyObject element)
{
if (IsAttached)
{
this.IsAttached = false;
if (_propertyListener != null)
{
_propertyListener.Detach();
_propertyListener = null;
}
propertyPathWalker.Update(null);
Target.InheritedContextChanged -= new EventHandler(this.OnTargetInheritedContextChanged);
Target = null;
}
}
internal override void OnSourceChanged(object oldvalue, object newValue)
{
IPropertyChangedListener listener = _dpListener;
if (listener != null)
{
_dpListener = null;
listener.Detach();
}
DependencyObject sourceDO = SourceDO;
if (sourceDO != null)
{
_dpListener = INTERNAL_PropertyStore.ListenToChanged(
sourceDO, _dp, OnPropertyChanged
);
}
}
internal override void OnDetach(DependencyObject d, DependencyProperty dp)
{
if (!IsAttached)
{
return;
}
this.IsAttached = false;
if (_propertyListener != null)
{
_propertyListener.Detach();
_propertyListener = null;
}
propertyPathWalker.Update(null);
Target.InheritedContextChanged -= new EventHandler(this.OnTargetInheritedContextChanged);
Target = null;
}
internal override void OnSourceChanged(object oldValue, object newValue)
{
if (oldValue is INotifyPropertyChanged inpc)
{
inpc.PropertyChanged -= new PropertyChangedEventHandler(OnSourcePropertyChanged);
}
IPropertyChangedListener listener = _dpListener;
if (listener != null)
{
_dpListener = null;
listener.Detach();
}
_dp = null;
_prop = null;
_field = null;
if (Source == null)
{
return;
}
if (_bindsDirectlyToSource)
{
return;
}
inpc = newValue as INotifyPropertyChanged;
if (inpc != null)
{
inpc.PropertyChanged += new PropertyChangedEventHandler(OnSourcePropertyChanged);
}
if (newValue is DependencyObject sourceDO)
{
Type type = _resolvedType ?? Source.GetType();
DependencyProperty dependencyProperty = INTERNAL_TypeToStringsToDependencyProperties.GetPropertyInTypeOrItsBaseTypes(type, _propertyName);
if (dependencyProperty != null)
{
_dp = dependencyProperty;
_dpListener = listener = INTERNAL_PropertyStore.ListenToChanged(sourceDO, dependencyProperty, OnPropertyChanged);
}
}
if (_dp == null)
{
Type sourceType = Source.GetType();
for (Type t = sourceType; t != null; t = t.BaseType)
{
_prop = t.GetProperty(
_propertyName,
BindingFlags.Public | BindingFlags.Instance | BindingFlags.Static | BindingFlags.DeclaredOnly
);
if (_prop != null)
{
break;
}
}
if (_prop == null)
{
// Try in case it is a simple field instead of a property:
_field = sourceType.GetField(_propertyName);
}
}
}