private GridEntry MoveDownFromItem(GridEntry item, int down_count)
{
while (down_count > 0)
{
/* if we're a parent node and we're expanded, move to our first child */
if (item.Expandable && item.Expanded)
{
item = (GridEntry)item.GridItems[0];
down_count--;
}
else
{
GridItem searchItem = item;
GridItemCollection searchItems = searchItem.Parent.GridItems;
int searchIndex = searchItems.IndexOf(searchItem);
while (searchIndex == searchItems.Count - 1)
{
searchItem = searchItem.Parent;
if (searchItem == null || searchItem.Parent == null)
{
break;
}
searchItems = searchItem.Parent.GridItems;
searchIndex = searchItems.IndexOf(searchItem);
}
if (searchIndex == searchItems.Count - 1)
{
/* if we got all the way back to the root with no nodes after
* us, the original item was the last one */
return(item);
}
else
{
item = (GridEntry)searchItems[searchIndex + 1];
down_count--;
}
}
}
return(item);
}
