[SOLVED] QDomNode is always null

Anticross

I wrote some method which returns QDomNode :
@
private: QDomNode createNode(QStandardItem * item) {

if (item == NULL)
 return QDomNode();    

QDomNode node;
node.toElement().setTagName(item->text());

// write attributes
QStandardItem * parent = item->parent();

if (parent == NULL)
 parent = invisibleRootItem();

for (int i = 1; i < columnCount(); i++) {

 QStandardItem * columnItem = parent->child(item->row(), i);

 if (columnItem == NULL)
  continue;

 QString sValue = columnItem->text();

 if (sValue.isEmpty())
  continue;

 node.toElement().setAttribute(headerData(i,Qt::Horizontal,Qt::DisplayRole).toString(), sValue);     
}

int childCount = item->rowCount();

for (int i = 0; i < childCount; i++) {

 QDomNode childNode = createNode(item->child(i));

 if (childNode.isNull())
  continue;

 node.appendChild(childNode);
}

return node;

}
@
But it always returns a null node, no matter of arguments. What am I doing wrong ?

raven-worx

because you use lines like these:
@
node.toElement()...
@

You should create a QDomElement and do all your work directly on it instead a QDomNode and convert it every time.
Currently you only call your methods on on converted elements (from your intitial node) ... which get discarded right in the next line ...

pkj__

You are not creating a QDomNode using QDomDocument::createElement() or similar functions. Since the stack variable QDomNode node is null, toElement() also returns a null. Create a valid node element first using QDomDocument variable for which the node is to be created.
@ QDomDocument doc;
QDomElement elem = doc.createElement("element"); @
Pass the doc element or create a new one as required. Refer QDomDocument and QDomNode and QDomElement documentation

Anticross

Thanks, phj_. Now it works fine.