FULL PRODUCT VERSION :


A DESCRIPTION OF THE PROBLEM :
Horizontal mouse wheel events that are not synthesized from pan events (i.e. events of type SWT.MouseHorizontalWheel) are not forwarded to the embedded scene by FXCanvas, while vertical mouse wheel events are. Similar to touch events (see JDK-8143596), these events are thus not received by the JavaFX scene.

The FXCanvasEx implementation provided by the Eclipse GEF project (or more precisely the gesture converter used by it internally: http://git.eclipse.org/c/gef/org.eclipse.gef4.git/tree/org.eclipse.gef4.fx.swt/src/org/eclipse/gef4/fx/swt/gestures/SWT2FXEventConverter.java) compensates this. However, the fix relies on internal API of JavaFX and will no longer work under the restrictions of Jigsaw.


REPRODUCIBILITY :
This bug can be reproduced always.