Using no deprecated enum Qt::MiddleButton

add-printer/DevicesModel.cpp

@@ -186,7 +186,7 @@ void DevicesModel::insertDevice(const QString &device_class,
                          device_location,
                          !grouped_printers.isEmpty());
     if (!grouped_printers.isEmpty()) {
-        stdItem->setData(qVariantFromValue(grouped_printers), DeviceUris);
+        stdItem->setData(QVariant::fromValue(grouped_printers), DeviceUris);
     }
 }
 

add-printer/PageDestinations.cpp

@@ -178,7 +178,7 @@ void PageDestinations::deviceChanged()
             ui->connectionsCB->clear();
             const auto printers = uris.value<KCupsPrinters>();
             for (const KCupsPrinter &printer : printers) {
-                ui->connectionsCB->addItem(printer.name(), qVariantFromValue(printer));
+                ui->connectionsCB->addItem(printer.name(), QVariant::fromValue(printer));
             }
             ui->connectionsGB->setVisible(true);
         }