How to handle the mouse wheel scrolling event using JavaFX?

Question

Just need to get some numeric equivalent, which will show how much the wheel is scrolled.

I managed to find an example only using awt/swing: Java Docs

P.S. Sorry for my English.

Answer 1

{
...
    sceneChart.setOnScroll(event -> print(event));
}

public void print (ScrollEvent event) {
    System.out.println(event.getDeltaY());
}

Answer 2

add onScroll to your javafx element to handle scroll event
for example here add onScroll to ImageView

<ImageView onScroll="#onScrollImageView" .........../>

and handle that in fxml controller like here:

public void onScrollImageView(ScrollEvent scrollEvent) {
            double deltaY = scrollEvent.getDeltaY();

            if(deltaY<0)
               //scroll up
            if(deltaY>0)
               //scroll down
    }

getDeltaY() return the vertical scroll amount.
and negative value of getDeltaY() or positive value means scroll direction