qtqt4qstandarditemmodelqstandarditem

How to remove the root element from QTreeView?

I process the removal of tree elements in the slot. All elements are deleted, except the last (root).

void TreeModel::slotDelete()
{
 QStandardItem *curItem = itemFromIndex(_tvMainTree->currentIndex());
 QStandardItem *curParent = itemFromIndex(_tvMainTree->currentIndex())->parent();

 if(!curItem || !curParent) return;

 curParent->removeRow(curItem->row());
}

Why is it that when I try to delete the last element, curParent is 0x0?

Specification: I build the tree using the root element of invisibleRootItem ().

Tell me how to delete the last (root) element?

Solution

  • Thanks to all. Here is the solution.

    void TreeModel::slotDelete()
{
 QStandardItem *curItem = itemFromIndex(_tvMainTree->currentIndex());
 if(!curItem) return;

 QStandardItem *curParent = curItem->parent();
 if(!curParent)
 {
  invisibleRootItem()->removeRow(curItem->row());
  return;
 }

 curParent->removeRow(curItem->row());
}