Method contextMenuEvent

QtNodeEditor/src/FlowView.cpp:101–199

void
FlowView::
contextMenuEvent(QContextMenuEvent *event)
{
  if (itemAt(event->pos()))
  {
    QGraphicsView::contextMenuEvent(event);
    return;
  }

  QMenu modelMenu;

  auto skipText = QStringLiteral("skip me");

  //Add filterbox to the context menu
  auto *txtBox = new QLineEdit(&modelMenu);

  txtBox->setPlaceholderText(QStringLiteral("Filter"));
  txtBox->setClearButtonEnabled(true);

  auto *txtBoxAction = new QWidgetAction(&modelMenu);
  txtBoxAction->setDefaultWidget(txtBox);

  modelMenu.addAction(txtBoxAction);

  //Add result treeview to the context menu
  auto *treeView = new QTreeWidget(&modelMenu);
  treeView->header()->close();

  auto *treeViewAction = new QWidgetAction(&modelMenu);
  treeViewAction->setDefaultWidget(treeView);

  modelMenu.addAction(treeViewAction);

  QMap<QString, QTreeWidgetItem*> topLevelItems;
  for (auto const &cat : _scene->registry().categories())
  {
    auto item = new QTreeWidgetItem(treeView);
    item->setText(0, cat);
    item->setData(0, Qt::UserRole, skipText);
    topLevelItems[cat] = item;
  }

  for (auto const &assoc : _scene->registry().registeredModelsCategoryAssociation())
  {
    auto parent = topLevelItems[assoc.second];
    auto item   = new QTreeWidgetItem(parent);
    item->setText(0, assoc.first);
    item->setData(0, Qt::UserRole, assoc.first);
  }

  treeView->expandAll();

  connect(treeView, &QTreeWidget::itemClicked, [&](QTreeWidgetItem *item, int)
  {
    QString modelName = item->data(0, Qt::UserRole).toString();

    if (modelName == skipText)