Looking at PopupWindow; that is an abstract class and I'm not finding much 
examples on how to use it. Maybe extending PopupControl would be a better 

Been looking at the ContextMenu source code (which is extending PopupControl), 
but it is somewhat mysterious how those MenuItems get rendered. I would expect 
maybe a skin, but I'm not finding it.

On 2014-6-9 13:48, Tomas Mikula wrote:
Hi Tom,

I am in favor of the menu being a PopupWindow, but alternatively,
could your "canvas" be a Group instead of a Pane?

The code would look like this:

     StackPane stack = new StackPane();

     Group canvas = new Group();

     stack.setOnMousePressed(e -> {
         // layout in the top left corner of the stack pane



On Mon, Jun 9, 2014 at 11:01 AM, Tom Eugelink <t...@tbee.org> wrote:
But a PopupWindow would be detached from the pane? Not sure if that is what
I envision, but I'll give it a go and see what it looks like.

Your event filter does work though for what I need now.


On 2014-6-9 10:41, Martin Sladecek wrote:
Oh, I see. So it's not a PopupWindow at all.
Events can pass only though parent-child hierarchy, so you can't catch an
Event in your "circular menu" pane and then pass it to some other children
of the parent StackPane. The menu pane would have to be parent of the
controls in the StackPane.
So again, you'd need RT-20184 to determine the target again by temporarily
making the menu pane mouse transparent, doing Scene.pick and then
redirecting the Event by Event.fireEvent().

But I think reworking you menu to be a PopupWindow should work. The
transparent areas in the circular menu should pass mouse events to the
underlying window.


On 06/09/2014 10:20 AM, Tom Eugelink wrote:

Or to see in in action with a single java -jar statement, download the
samples from.

On 2014-6-9 10:13, Martin Sladecek wrote:
OK, so to avoid further confusion, you have a PopupWindow with a Pane
and you want to capture Events on the Pane and sent those events to the
underlying controls (in a parent window) if those events are not relevant to
that popup?


On 06/09/2014 10:07 AM, Tom Eugelink wrote:

Hm, maybe I chose bad words; I'm not using Canvas, but just a Pane.
Since the Pane is only used to draw the menu on when it need to appear, I'm
calling it the canvas pane, as in "what is painted on".

On 2014-6-9 9:46, Martin Sladecek wrote:
Just looked at the code and it seems Canvas does pick on bounds
independently of the pickOnBounds value. There's currently no logic for
picking only when over an opaque pixel ( worth filing a JIRA issue maybe?).
This makes Canvas to consume everything as it's always picked instead of
some controls underneath.

Unfortunately, I can't think of any solution that would work right
now. If we'd support Node picking
(https://javafx-jira.kenai.com/browse/RT-20184), it would be possible to
"redirect" an unwanted event to a different event target on that mouse


On 06/09/2014 08:44 AM, Tom Eugelink wrote:

Yessss. It does not work on the canvas pane, I suspect because of the
pickOnBounds, but it does work on the stackpane. Plus, I can register to the
stack pane without claiming the onMouseClick/Press hook.

Many thanks!


On 2014-6-9 8:29, Martin Sladecek wrote:
Hi Tom,
have you tried .addEventFilter() method? It receives the Event
before the controls underneath the canvas, in the capturing phase. If you
don't consume the Event, it should pass down to the controls.
For more on the topic, see
http://docs.oracle.com/javafx/2/events/processing.htm or


On 06/09/2014 08:19 AM, Tom Eugelink wrote:
Hi all,

Maybe someone has solved this already, so I thought I pop the
question. Currently I'm working on CirclePopupMenu; a menu that is supposed
to pop up on any place in a scene when a certain (usually the middle or
right) mouse button is pressed.

Right now CirclePopupMenu requires a stackpane to which it binds
itself. CirclePopupMenu initially places an empty "canvas" Pane on the stack
pane, and will use that to render and position the menu when it needs to

Also I need to monitor the mouse to detect if the menu should
appear. In order to do that, I would like to use that canvas pane, but then
any non relevant button clicks will not reach the underlying controls. In
order to enable correct behavior I need to setPickOnBounds(false) on the
pane, but then it does receive the mouse events anymore.

Is there any way to monitor mouse events but still pass them
through to the underlying controls? In Swing I did something similar and
used a system level mouse event hook.


PS: I'm not certain if the stackpane approach I've used is the best
way to do this. It does work expect the mouse button problem. But any
suggestions are welcome.

Reply via email to