monitor mouse events but not capture them

Tue Jun 10 11:45:09 UTC 2014

What about using Popup, which is a subclass of PopupWindow? You just need
to populate its content

    popup.getContent().addAll(Node...);

and then show it at the right position, relative to any node

    popup.show(canvas, x, y);

Tomas
On Jun 10, 2014 8:49 AM, "Tom Eugelink" <tbee at tbee.org> wrote:

>
> 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
> choice.
>
> 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();
>>      canvas.setManaged(false);
>>
>>      stack.setOnMousePressed(e -> {
>>          // layout in the top left corner of the stack pane
>>          canvas.setLayoutX(0);
>>          canvas.setLayoutY(0);
>>
>>          stack.getChildren().add(canvas);
>>      });
>>
>> Regards,
>> Tomas
>>
>> On Mon, Jun 9, 2014 at 11:01 AM, Tom Eugelink <tbee at 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.
>>>
>>> Thanks!
>>>
>>>
>>> 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.
>>>>
>>>> -Martin
>>>>
>>>> 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.
>>>>> http://jfxtras.org/
>>>>>
>>>>>
>>>>>
>>>>> 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?
>>>>>>
>>>>>> Thanks,
>>>>>> -Martin
>>>>>>
>>>>>> 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
>>>>>>>> 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.
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>
>>>>>
>>>
>
>