internal ToolStripItem SelectNextToolStripItem(ToolStripItem start, bool forward)
{
var collection = Items;
if (collection.Count == 0)
{
return(null);
}
if (collection.Any(item => item.CanSelect) == false)
{
return(null);
}
if (collection.Count == 1)
{
collection[0].Select();
return(collection[0]);
}
var nextItem = start;
if (nextItem == null)
{
nextItem = forward ? collection[0] : collection[collection.Count - 1];
}
else
{
var currentIndex = collection.IndexOf(nextItem);
var nextIndex = forward ? currentIndex + 1 : currentIndex - 1;
if (nextIndex < 0)
{
nextIndex = collection.Count - 1;
}
if (nextIndex >= collection.Count)
{
nextIndex = 0;
}
nextItem = collection[nextIndex];
}
if (nextItem.CanSelect == false)
{
nextItem = SelectNextToolStripItem(nextItem, forward);
}
if (start != null)
{
start.Unselect();
}
if (nextItem != null)
{
nextItem.Select();
}
return(nextItem);
}
