int FindCurrentSectionPosition(int fromPosition)
{
IListAdapter adapter = Adapter;
if (fromPosition >= adapter.Count)
{
return(-1); // dataset has changed, no candidate
}
if (adapter.GetType().IsAssignableFrom(typeof(ISectionIndexer)))
{
// try fast way by asking section indexer
ISectionIndexer indexer = (ISectionIndexer)adapter;
int sectionPosition = indexer.GetSectionForPosition(fromPosition);
int itemPosition = indexer.GetPositionForSection(sectionPosition);
int typeView = adapter.GetItemViewType(itemPosition);
if (IsItemViewTypePinned(adapter, typeView))
{
return(itemPosition);
} // else, no luck
}
// try slow way by looking through to the next section item above
for (int position = fromPosition; position >= 0; position--)
{
int viewType = adapter.GetItemViewType(position);
if (IsItemViewTypePinned(adapter, viewType))
{
return(position);
}
}
return(-1); // no candidate found
}
public static Boolean isItemViewTypePinned(IListAdapter adapter, int viewType)
{
if (adapter.GetType() == (new HeaderViewListAdapter(null, null, null)).GetType())
{
adapter = ((HeaderViewListAdapter)adapter).WrappedAdapter;
}
return(((PinnedSectionListAdapter)adapter).isItemViewTypePinned(viewType));
}
public bool IsItemViewTypePinned(IListAdapter adapter, int viewType)
{
if (adapter.GetType().IsAssignableFrom(typeof(HeaderViewListAdapter)))
{
adapter = ((HeaderViewListAdapter)adapter).WrappedAdapter;
}
return(((IPinnedSectionListAdapter)adapter).IsItemViewTypePinned(viewType));
}
public static Boolean isItemViewTypePinned(IListAdapter adapter, int viewType) {
if (adapter.GetType() == (new HeaderViewListAdapter(null,null, null)).GetType()) {
adapter = ((HeaderViewListAdapter)adapter).WrappedAdapter;
}
return ((PinnedSectionListAdapter) adapter).isItemViewTypePinned(viewType);
}
