monitor mouse events but not capture them

[Martin Sladecek]

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.

-Martin


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 
>> http://docs.oracle.com/javafx/2/events/processing.htm or 
>> http://parleys.com/play/514892290364bc17fc56c39f
>>
>> -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.
>>
>
>