Hi Miroslav Matovic,
if you want to trigger actions in the drag event in version 4.10 you can check the event attributes for 'action'.
You can add this inside your on.drag function.
if (evt.action === 'start')
if (evt.action === 'update')
if (evt.action === 'end')
With these conditions you can trigger actions, when the drag startet, the dragging lasts or at the end of the dragging.
I hope this will help you and answers your questions.