Fetch values from QWidgets added to QTreeWidgets via QTreeWidgetItems - c++

Question

I've searched many places and found lots of interesting information, but none of that seems to work for what I want. I've tried to follow the solution shown at https://stackoverflow.com/a/9986293/11035837 to no avail.
Basics of my structure: I have a QTreeWidget. I add top level QTreeWidgetItems dynamically (upon the push of a button in a header button box). Each top level QTreeWidgetItem then gets other widgets added to it using:
QTreeWidget* treeWidget = new QTreeWidget;
QTreeWidgetItem* new_record = new QTreeWidgetItem;
QPushButton* add_child = new QPushButton;
QLineEdit* user_input = new QLineEdit;
treeWidget->setItemWidget(new_record,1,add_child);
treeWidget->setItemWidget(new_record,2,user_input);
The add_child button works perfectly. I have a display that inserts all my QLabels, QLineEdits, and QPushButtons in a tree tiered fashion. My buttons work for adding and removing the visual display of items even triggering the visibility of various other elements.
However, I cannot get the user input data out of the QLineEdits to process for anything (such as writing to an output file).
I have my output function iterate through the QTreeWidget:
QTreeWidgetItemIterator iter(treeWidget);
while (*iter)
{
stream.writeStartElement("record");
if ((*iter) != nullptr)
{
for (int i = 0; i < 12; i++)
{
if((*iter)->text(i) != nullptr) stream.writeAttribute("record_name", (*iter)->text(i));
}
}
for (int i = 0; i < 12; i++)
{
if ((*iter) != nullptr && (*iter)->child(i) != nullptr)
{
for (int j = 0; j < 12; j++)
{
if ((*iter)->child(i)->text(j) != nullptr) stream.writeAttribute("record_name", (*iter)->child(i)->text(j));
}
}
}
++iter;
}
This prints as many records with record_name displayed as were created, but it doesn't display any of the other data, because the pointer defined by (*iter)->child(i) is nullptr regardless of i
I then tried using data();
stream.writeAttribute("record_name ", (*iter)->data(2, Qt::UserRole).toString());
This doesn't err out because of nullptr, but it prints out record_name="" rather than record_name="<user_input>"
I'm able to get the user input for QLineEdit widgets that are not in the QTreeWidget, just not the ones in the tree. I assume if I can figure out how to get the data out of the QLineEdits within the tree that I should be able to adapt that to getting the QLineEdits out of a custom QWidget also within the tree.

Answer 1

I found a solution using information from https://www.qtcentre.org/threads/23228-typecast-of-QWidget
stream.writeAttribute("record_name", qobject_cast<QLineEdit*>(treeWidget->itemWidget((*iter), 2))->text() );
The issue was that the QLineEdit widgets were being recalled as QWidgets and not as QLineEdit widgets and as such the text() method/function was not available to it until I cast it back as the desired type.