type_definitions::type_definitions(com_ptr<IMetaDataImport2> metadata)
: _metadata { metadata }
{
if (!metadata.get())
{
throw invalid_argument { "metadata must not be a nullptr" };
}
}
com_ptr<IDataObject> data_object_from_item_array(
com_ptr<IShellItemArray> items, com_ptr<IBindCtx> bind_ctx)
{
com_ptr<IDataObject> data_object;
if (items)
{
items->BindToHandler(
bind_ctx.get(), BHID_DataObject, data_object.iid(),
reinterpret_cast<void**>(data_object.out()));
}
// We don't care if binding succeeded - if it did, great; we pass
// the DataObject. If not, the data_object pointer will be NULL
// and we can assume that no items were selected
return data_object;
}