Dynamic menu

I have TreeView with context menu (QMenu) in my program. But it have to be dynamic one, I mean than menu items created in runtime. Each item have his own set of actions.
My problem is how to avoid memory leaks.

I will illustrate it by example:

Code:

---

//menu initialization:
treeMenu = new QMenu(ui->objectTree);
connect(ui->objectTree,SIGNAL(customContextMenuRequested(const QPoint&)),this,SLOT(treePopupShow(const QPoint&)));
 
// slot
void MyProgram::treePopupShow(const QPoint & point) {
    QModelIndex index = ui->objectTree->indexAt(point);
    if(index.isValid())
    {
        TreeItem * item = static_cast<TreeItem *>(index.internalPointer());
        if(item)
        {
             treeMenu->clear();
             switch(item->getType())
             {
                    case NodeType1:
                    QMenu * submenu1 = treeMenu->addMenu(tr("submenu1")); // memory leak
                    foreach(QString action,actionList1)
                    {
                        QAction * action = submenu1->addAction(action);
                        action->setData(action);
                    }
                    break;
                    case NodeType2:
                    QMenu * submenu2 = treeMenu->addMenu(tr("submenu2")); // memory leak
                    foreach(QString action,actionList2)
                    {
                        QAction * action = submenu2->addAction(action);
                        action->setData(action);
                    }
                    break;
             }
        }
}

---

It will be tens of such submenus like submenu1 and submenu2. and tens of top items. treeMenu->clear() clears only actions, not submenus. May be I have to store all of them to delete every time when menu is shown?

In this case there's no leak.
When calling clear() actions get removed and deleted (if not used anywhere else), menus don't but:
They don't leak as they're still parented ( clear() doesn't remove children ) so they will get deleted when the parent eventually gets destroyed.

You can test it by checking for parent on a menu that was just cleared.

Also to delete them you don't have to store them, you can get all the children by calling children() and then deleting them in a loop.

Edit: it does not apply when using QMenu::addMenu ( QMenu * menu ) as this method doesn't take ownership of the added menu.