Silly programming question

[tonyb-2]

In Qt3, how does one traverse a QValueListIterator in reverse? It doesn't
provide the toBack(), atFirst() functions like QPtrListIterator (and
QListIterator in Qt4)!!

--
Cheers,

TonyB

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[Thomas Baumgart]

Hi,

on Wednesday 04 November 2009 tonyb wrote:


> In Qt3, how does one traverse a QValueListIterator in reverse? It doesn't
> provide the toBack(), atFirst() functions like QPtrListIterator (and
> QListIterator in Qt4)!!

I've done this somewhere in the code but can't remember where. Now it's too
big :)

You could try this:

  QValueList<xxx> list;
  QValueList<xxx>::const_iterator it;
  it = list.end();
  if(list.count() > 0) {
    do {
      --it; // decrement prior to using the iterator

      // do whatever you need to do here

    } while(it != list.begin());
  }


Hope I remembered this correctly. No guarantee that the syntax is correct :)

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Regards

Thomas Baumgart

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