public virtual PropertyDescriptorCollection GetProperties(Attribute[] attributes)
{
if (_properties == null)
{
_properties = new PropertyDescriptorCollection(null);
// get list of properties through reflection
PropertyWindowViewModelHelper.AddReflectedProperties(_properties, this, attributes, _editingContext);
// add properties from extender objects
PropertyWindowViewModelHelper.AddExtendedProperties(this, _properties, attributes, _editingContext);
}
return(PropertyWindowViewModelHelper.GetBrowsableProperties(_properties));
}
public override PropertyDescriptorCollection GetProperties(ITypeDescriptorContext context, object component, Attribute[] attributes)
{
if (_lastComponent != component)
{
// one single instance of the type converter may be used for querying the
// properties of different component instances, but the list of properties is
// specific to each component, so invalidate the cached list of properties if
// the component is not the same as the last queried one.
// TODO: verify if this can be solved by deriving from IResettableConverter
_properties = null;
_lastComponent = component;
}
if (_properties == null)
{
EditingContext editingContext = null;
foreach (var typeDescriptor in PropertyWindowViewModelHelper.GetObjectsFromSelection <ObjectDescriptor>(context.Instance))
{
editingContext = typeDescriptor.EditingContext;
break;
}
Debug.Assert(editingContext != null);
if (editingContext != null)
{
_properties = new PropertyDescriptorCollection(null);
// get list of properties through reflection
PropertyWindowViewModelHelper.AddReflectedProperties(_properties, component, attributes, editingContext);
// add properties from extender objects
PropertyWindowViewModelHelper.AddExtendedProperties(
component as IHavePropertyExtenders, _properties, attributes, editingContext);
}
}
return(PropertyWindowViewModelHelper.GetBrowsableProperties(_properties));
}