public bool IterNext(ref TreeIter iter)
{
if ((sourceList == null) || (sourceList.Count == 0))
{
return(false);
}
object node = NodeFromIter(iter);
if (node == null)
{
return(false);
}
object lastNode;
//Check for "Collection was modified" Exception
try {
lastNode = cachedEnumerator != null ? cachedEnumerator.Current : null;
} catch (InvalidOperationException ex) {
lastNode = null;
}
if (lastNode == node)
{
try {
return(GetCacheNext(ref iter));
}
catch (InvalidOperationException ex)
{
Console.WriteLine("Collection was changed");
}
}
cachedEnumerator = sourceList.GetEnumerator();
while (cachedEnumerator.MoveNext())
{
if (node == cachedEnumerator.Current)
{
return(GetCacheNext(ref iter));
}
}
cachedEnumerator = null;
return(false);
}
