protected void AttachToDataDescriptor(UIElement element)
{
if (_element == null)
{
return;
}
if (!String.IsNullOrEmpty(Property))
{
string property = Property;
int index = property.IndexOf('.');
if (index != -1)
{
string propertyProvider = property.Substring(0, index);
string propertyName = property.Substring(index + 1);
DefaultAttachedPropertyDataDescriptor result;
if (!DefaultAttachedPropertyDataDescriptor.CreateAttachedPropertyDataDescriptor(new MpfNamespaceHandler(),
element, propertyProvider, propertyName, out result))
{
ServiceRegistration.Get <ILogger>().Warn(
string.Format("Attached property '{0}' cannot be set on element '{1}'", property, element));
return;
}
_dataDescriptor = result;
_dataDescriptor.Attach(OnPropertyChanged);
}
else
{
if (ReflectionHelper.FindMemberDescriptor(_element, Property, out _dataDescriptor))
{
_dataDescriptor.Attach(OnPropertyChanged);
}
}
}
}
protected bool FindPropertyDescriptor(UIElement element,
out IDataDescriptor propertyDescriptor, out DependencyObject targetObject)
{
string targetName = TargetName;
propertyDescriptor = null;
if (string.IsNullOrEmpty(targetName))
{
targetObject = element;
}
else
{
// Search the element in "normal" namescope and in the dynamic structure via the FindElement method
// I think this is more than WPF does. It makes it possible to find elements instantiated
// by a template, for example.
targetObject = element.FindElementInNamescope(targetName) ??
element.FindElement(new NameMatcher(targetName));
if (targetObject == null)
{
return(false);
}
}
string property = Property;
int index = property.IndexOf('.');
if (index != -1)
{
string propertyProvider = property.Substring(0, index);
string propertyName = property.Substring(index + 1);
DefaultAttachedPropertyDataDescriptor result;
if (!DefaultAttachedPropertyDataDescriptor.CreateAttachedPropertyDataDescriptor(new MpfNamespaceHandler(),
element, propertyProvider, propertyName, out result))
{
ServiceRegistration.Get <ILogger>().Warn(
string.Format("Attached property '{0}' cannot be set on element '{1}'", property, targetObject));
return(false);
}
propertyDescriptor = result;
return(true);
}
else
{
string propertyName = property;
IDataDescriptor result;
if (!ReflectionHelper.FindMemberDescriptor(targetObject, propertyName, out result))
{
ServiceRegistration.Get <ILogger>().Warn(
string.Format("Property '{0}' cannot be set on element '{1}'", property, targetObject));
return(false);
}
propertyDescriptor = result;
return(true);
}
}