FULL PRODUCT VERSION :


ADDITIONAL OS VERSION INFORMATION :
Non OS-specific problem.

A DESCRIPTION OF THE PROBLEM :
As reported in JDK-8088262 already, FXCanvas does not forward any touch gesture events to the embedded scene.

The Eclipse GEF project provides an FXCanvasEx to compensate this problem (http://git.eclipse.org/c/gef/org.eclipse.gef4.git/tree/org.eclipse.gef4.fx.swt/src/org/eclipse/gef4/fx/swt/canvas/FXCanvasEx.java).

It internally uses a modified version of the helper class (http://git.eclipse.org/c/gef/org.eclipse.gef4.git/tree/org.eclipse.gef4.fx.swt/src/org/eclipse/gef4/fx/swt/gestures/SwtToFXGestureConverter.java) mentioned by Jan Köhnlein in JDK-8088262.

However, this helper class accesses JDK internal API, so that the workaround will probably not work with Jigsaw:

bin -> javafx.graphics
   org.eclipse.gef4.fx.swt.gestures.SwtToFXGestureConverter (bin)
      -> com.sun.javafx.tk.TKSceneListener JDK internal API (javafx.graphics)
   org.eclipse.gef4.fx.swt.gestures.SwtToFXGestureConverter$3$1 (bin)
      -> com.sun.javafx.tk.TKSceneListener JDK internal API (javafx.graphics)

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Have full support for forwarding touch gesture events to the embedded scene within FXCanvas.
ACTUAL -
No touch gesture events are forwarded by FXCanvas.

REPRODUCIBILITY :
This bug can be reproduced always.