title: Qt Charts - How to display a specific point value on x and y axis?
body: <p>I have a chart with QLineSeries and I would like to display x and y value of the point where the mouse is. I think I can handle the problem of retrieving the mouse point but I don't know how to display it with Qt Charts.</p>
  
  <p>I don't see functions to do that in QValueAxis and others.</p>
  
  <p>The point doesn't have to be displayed on axis necessarily, directly under the mouse would be enough as well.</p>