Qt Labs Forum » ModelTest

1. 
   mwerner
   Member

   Hej,

   I've subclassed QAbstractListModel() but not reimplemented hasChildren(). The test »Q_ASSERT(model->hasChildren(topIndex) == true);« in »ModelTest::rowCount()« fails and I don't quite get why.

   My rowCount() implementation looks like this:

   int MyModel::rowCount(const QModelIndex &parent) const
   {
   Q_UNUSED(parent);
   return entries->count();
   }

   entries is a QList<Entry>*.

   What am I getting wrong here?

   TIA,
   Max

   Posted: 1 year #

2. 
   Benjamin Meyer
   Administrator

   You need to check if parent is valid or not. Because it is a list and not a tree the rowCount of any valid index would be 0. Because rowCount() is returning a positive number for a valid parent the modeltest is checking that hasChildren() with parent is also returning true.

   int MyModel::rowCount(const QModelIndex &parent) const
   {
   if (parent.isValid())
   return 0;
   return entries->count();
   }

   Posted: 1 year #

3. 
   mwerner
   Member

   Ok, now I got it! I shouldn't ignore parameters that airy. ;)

   Thx,
   Max

   Posted: 1 year #

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