Custom context menu in QTreeView

[ttvo]

Hi all,

I have a QTreeView and QStandardItemModel and want to add a context menu so that new child node(s) can be added to the current node.

At construction, I'd like to have three empty tree nodes
<checkbox><icon>Rectangles
<checkbox><icon>Circles
<checkbox><icon>Squares

and to enable a right click on each of those nodes to add/delete/modify. I started with an ActionsContextMenu but then I need the node's index, so I successfully created a custom context menu.

...
  // set context menu policy
   projectTreeView->setContextMenuPolicy(Qt::CustomContextMenu);
   ...
 
  // initialize the model with three empty nodes
  QStandardItemModel *model = new QStandardItemModel();
  model->setHorizontalHeaderItem(0, new QStandardItem());
  m_dm[0] = new QStandardItem(QIcon(":/images/myIcon.png"), "Rectangles");
  m_dm[1] = new QStandardItem(QIcon(":/images/myIcon.png"), "Circles");
  m_dm[2] = new QStandardItem(QIcon(":/images/myIcon.png"), "Squares");
  for (int i=0; i<3; ++i) {
    model->appendRow(m_dm[i]);
  }
  m_ui.projectTreeView->setModel(model);
  ...
 
  // create an add action and connect it to a signal
  m_addAction = new QAction(tr("Add new"), m_ui.projectTreeView);
  connect(m_addAction, SIGNAL(triggered()), this, SLOT(addObject()));
 
  // connect custom context menu
  connect(m_ui.projectTreeView, SIGNAL(customContextMenuRequested( const QPoint& )), this, SLOT(showContextMenu(const QPoint &)));
 
  ...
  void showContextMenu(const QPoint& pnt)
  {
  QList<QAction *> actions;
  if (m_ui.projectTreeView->indexAt(pnt).isValid()) {
    actions.append(m_addAction);
  }
  if (actions.count() > 0)
    QMenu::exec(actions, m_ui.projectTreeView->mapToGlobal(pnt));
  }
 
  ...
  void MainWindow::addObject()
  {
     // HOW am I going to get access to the node's index to insert a new child row??? 
  }

...
  // set context menu policy
   projectTreeView->setContextMenuPolicy(Qt::CustomContextMenu);
   ...

  // initialize the model with three empty nodes
  QStandardItemModel *model = new QStandardItemModel();
  model->setHorizontalHeaderItem(0, new QStandardItem());
  m_dm[0] = new QStandardItem(QIcon(":/images/myIcon.png"), "Rectangles");
  m_dm[1] = new QStandardItem(QIcon(":/images/myIcon.png"), "Circles");
  m_dm[2] = new QStandardItem(QIcon(":/images/myIcon.png"), "Squares");
  for (int i=0; i<3; ++i) {
    model->appendRow(m_dm[i]);
  }
  m_ui.projectTreeView->setModel(model);
  ...
  
  // create an add action and connect it to a signal
  m_addAction = new QAction(tr("Add new"), m_ui.projectTreeView);
  connect(m_addAction, SIGNAL(triggered()), this, SLOT(addObject()));

  // connect custom context menu
  connect(m_ui.projectTreeView, SIGNAL(customContextMenuRequested( const QPoint& )), this, SLOT(showContextMenu(const QPoint &)));

  ...
  void showContextMenu(const QPoint& pnt)
  {
  QList<QAction *> actions;
  if (m_ui.projectTreeView->indexAt(pnt).isValid()) {
    actions.append(m_addAction);
  }
  if (actions.count() > 0)
    QMenu::exec(actions, m_ui.projectTreeView->mapToGlobal(pnt));
  }

  ...
  void MainWindow::addObject()
  {
     // HOW am I going to get access to the node's index to insert a new child row??? 
  }

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I got the code to compile and the addObject() method is invoked properly. My question is how am I going to get access to the corresponding node index to insert a child node appropriately?

Thanks in advance.