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 position.


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 http://parleys.com/play/514892290364bc17fc56c39f


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.


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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