/// <inheritdoc/>
public override bool CanAttach(INodePresenter nodePresenter)
{
// We are in a dictionary...
var dictionaryDescriptor = nodePresenter.Descriptor as DictionaryDescriptor;
if (dictionaryDescriptor == null)
{
return(false);
}
// ... that is not read-only...
var memberCollection = (nodePresenter as MemberNodePresenter)?.MemberAttributes.OfType <MemberCollectionAttribute>().FirstOrDefault()
?? nodePresenter.Descriptor.Attributes.OfType <MemberCollectionAttribute>().FirstOrDefault();
if (memberCollection?.ReadOnly == true)
{
return(false);
}
// ... can construct key type...
if (!AddNewItemCommand.CanConstruct(dictionaryDescriptor.KeyType))
{
return(false);
}
// ... and can construct value type
var elementType = dictionaryDescriptor.ValueType;
return(AddNewItemCommand.CanAdd(elementType));
}
/// <inheritdoc/>
public override bool CanAttach(INodePresenter nodePresenter)
{
// We are in a dictionary
if (!(nodePresenter.Descriptor is DictionaryDescriptor dictionaryDescriptor))
{
return(false);
}
// It is not read-only
var memberCollection = (nodePresenter as MemberNodePresenter)?.MemberAttributes
.OfType <MemberCollectionAttribute>()
.FirstOrDefault() ??
nodePresenter.Descriptor.Attributes
.OfType <MemberCollectionAttribute>()
.FirstOrDefault();
if (memberCollection?.ReadOnly == true)
{
return(false);
}
// It can construct the key type
if (!AddNewItemCommand.CanConstruct(dictionaryDescriptor.KeyType))
{
return(false);
}
// And it can construct the value type
var elementType = dictionaryDescriptor.ValueType;
return(AddNewItemCommand.CanAdd(elementType));
}
