private void ProperAccess_Click(object sender, EventArgs e)
{
if (stackCollection.Any())
{
var ret = stackCollection.Pop();
MessageBox.Show(ret.ToString());
}
else
{
MessageBox.Show("Collection is empty");
}
}
public virtual void IterateTree(Predicate <INfNode <T> > searchBy, Func <INfNode <T>, INfNode <T> > doSomething)
{
var callStack = new System.Collections.Generic.Stack <INfNode <T> >();
//start at top
var ivItem = (INfNode <T>) this;
while (ivItem != null)
{
var nextItem = ivItem.NextItem();
if (nextItem != null)
{
//detect if some parent item is also a child item
if (ReferenceEquals(nextItem, ivItem) || callStack.Any(v => ReferenceEquals(v, nextItem)))
{
nextItem = null;
}
else
{
callStack.Push(ivItem);
}
}
ivItem = nextItem;
if (ivItem == null)
{
if (callStack.Count <= 0)
{
break;
}
ivItem = callStack.Pop();
continue;
}
//search for whatever by such-and-such
if (!searchBy(ivItem))
{
continue;
}
//having a match then do such-and-such
var parent = callStack.Peek();
var ivItemIdx = (parent?.CurrentIndex ?? 0) - 1;
if (parent == null || ivItemIdx < 0 || ivItemIdx >= parent.Count)
{
ivItem = doSomething(ivItem);
continue;
}
parent.Items[ivItemIdx] = doSomething(ivItem);
}
}