Zoom in and out , mouse scroll

[etixpp]

Hello,
i want to zoom in when mouse scrolls in front and zoom out when mouse scrolls back, but i find only the option sf::Mouse::middle so it activates when middle mouse button is pressed but i want a event if middle mouse button is scrolled :/ is there a way to do this?

[Laurent]

http://www.sfml-dev.org/tutorials/2.0/window-events.php#the-mousewheelmoved-event