Edit a QstandardItem model exposed to treeview - c++

Question

I want to edit the model contents when clicked.
I am able to see the contents but when clicked i want to edit it.
I also want to view the clicked index.
Is there any way ?
Is there any way ?
Or is there any other method to introduce a tree model and make it's content editable?
h file
==========
class TreeView : public QStandardItemModel
{
Q_OBJECT
public:
TreeView(QObject *parent = nullptr);
Q_INVOKABLE void add_header_row();
};
cpp file
===========
QStandardItem *rootItem = new QStandardItem;
QStandardItem *group1 = new QStandardItem;
QStandardItem *group2 = new QStandardItem;
setColumnCount(1);
rootItem = invisibleRootItem();
group1->setText("Heading");
group2->setText("Sub Heading");
group1->appendRow(group2);
rootItem->appendRow(group1);
main cpp file
=========
QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
QGuiApplication app(argc, argv);
QQmlApplicationEngine engine;
TreeView myModel;
engine.rootContext()->setContextProperty("myModel", &myModel);
const QUrl url(QStringLiteral("qrc:/main.qml"));
QObject::connect(&engine, &QQmlApplicationEngine::objectCreated,
&app, [url](QObject *obj, const QUrl &objUrl) {
if (!obj && url == objUrl)
QCoreApplication::exit(-1);
}, Qt::QueuedConnection);
engine.load(url);
return app.exec();
qml file
==========
TreeView{
id: application_view
width: mainWindow.width / 2
height: mainWindow.height
model: myModel
backgroundVisible: true
headerVisible: false
selectionMode: SelectionMode.SingleSelection
TableViewColumn{
role: "display"
}
}