Quote Originally Posted by Urvin View Post
I can't imagine what to write in canFetchMore and fetchMore
Back in your first post, you had code like this:
Qt Code: 
  1. if (*condition*)
  2.             node->children.last()->children.append(new treeNodeClient(-1, tr("Loading..."), node->children.last() ));
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which I presume now reads:
Qt Code: 
  1. node->children.last()->hasChildren = *condition*;
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instead. You’ll then want something like this:
Qt Code: 
  1. bool modelClients::canFetchMore(const QModelIndex& parent) const {
  2.     if (!parent.isValid()) return false;
  3.     treeNodeClient *node = static_cast<treeNodeClient*>(parent.internalPointer());
  4.     return parentNode->hasChildren && !parentNode->children.count();
  5. }
  6.  
  7. void modelClients::fetchMore (const QModelIndex& parent) {
  8.     if (!canFetchMore(parent)) return;
  9.     treeNodeClient *node = static_cast<treeNodeClient*>(parent.internalPointer());
  10.     //
  11.     // get the information you need to populate node
  12.     //
  13.     beginInsertRows(node, 0, mm_IDs.count()-1);
  14.     setLists(node, mm_IDs, mm_Names);
  15.     endInsertRows();
  16. }
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for canFetchMore and fetchMore.