public void AddTileset(ITileset tSet)
{
SortableTreeNode tSetNode = new SortableTreeNode(tSet.Name);
tSetNode.Tag = tSet;
mapList.Nodes.Add(tSetNode);
foreach (string tSetMapGroup in tSet.Subsets.Keys)
{
SortableTreeNode tsGroup = new SortableTreeNode(tSetMapGroup);
tsGroup.Tag = tSet.Subsets[tSetMapGroup];
tSetNode.Nodes.Add(tsGroup);
addMaps(tsGroup, tSet.Subsets[tSetMapGroup]);
}
}