monitor mouse events but not capture them

Martin Sladecek martin.sladecek at
Mon Jun 9 07:46:33 UTC 2014

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 
(, 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!
> Tom
> 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 
>> or 
>> -Martin
>> 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 appear.
>>> 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.
>>> Tom
>>> 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.

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