JavaFX embedded (jre 8u6): touch problem (malformed multi touch event)

Prasant J pj0585 at
Fri Jul 25 14:06:59 UTC 2014

On Wed, Jul 23, 2014 at 6:36 PM, Lisa Selle <lisa.selle at> wrote:
> Hi Prasant,
> This looks suspiciously related to
>  If so, this bug *should* be
> fixed in Monocle but it is not (and will not be) fixed in lens.

Thanks Lisa for pointing that out.
First I tried to build the openjfx 8u6 (you pasted a link in another
post) with the patch someone posted in the RT-34296 jira post.

The patch had to be manually applied because it was created from a
different changeset. Anyway, I was able to apply the patch and cross
build successfully. However, only one touch was working. Second touch
is not working (I could not figure out). The single touch is also
sending two events and my application has different behaviour for one
event and two events. So, I abandoned this idea and I;m building the
latest javafx.

> I believe you are building openJFX, correct?  If you can try a recent build
> with the latest Monocle code (if you are building from OpenJFX, monocle is
> now the default) the problem should be resolved. Please let us know if
> that's not the case.

I was able to build from 8u-dev/rt (tag: 8u20-b23). However my
application is recognizing the touch only on the main window. I have
multi-touch in the pop-up window where even single touch in not
working from some reason.

Whenever I touch to bring up the pop-up window I get the following
error message on console:

Exception in thread "JavaFX Application Thread"
        at javafx.scene.control.ScrollPane.createDefaultSkin(
        at javafx.scene.control.Control.impl_processCSS(
        at javafx.scene.Parent.impl_processCSS(
        at javafx.scene.Parent.impl_processCSS(
        at javafx.scene.Parent.impl_processCSS(
        at javafx.scene.Node.processCSS(
        at javafx.scene.Node.processCSS(
        at javafx.scene.Node.processCSS(
        at javafx.scene.Scene.doCSSPass(
        at javafx.scene.Scene.access$3400(
        at javafx.scene.Scene$ScenePulseListener.pulse(
        at$$Lambda$354/ Source)
        at Method)
Dialog discovered: LayerSetupDialog

To summarize, I have built latest javafx but cannot test my touch.

Any suggestions?

Regards, Prasant

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