On 10/7/2013 6:53 PM, Richard Bair wrote:
That being said, this seems like a very common use case, and I wonder if there
is something more we could do (in the longer term, short term do as Artem
suggests)
One of the options is to provide API to query for keyboard state at any
arbitrary moment, whether particular key is pressed or not. Even if we
only support locking keys (Caps, Num, Scroll, Kana) and control keys
(Shift, Control, Command, Alt), it will be of great value. Game
developers will be happy to have such API for all the keys, including
navigation and letter ones.
Thanks,
Artem
On Oct 7, 2013, at 3:56 AM, Artem Ananiev <artem.anan...@oracle.com> wrote:
On 10/7/2013 2:40 AM, Pedro Duque Vieira wrote:
Hi,
I have the following use case:
When the user presses shift and the mouse is hover the chart component the
cursor must change to an open hand cursor signaling to the user that the
chart is ready for a panning action.
The problem is that for this to be possible I want the chart to be able to
listen to keyboard events even when it doesn't have focus.
I think this is not possible and I wonder why. Swing was the same, you
could only listen to keyboard events if the control had focus. Is this a
technical limitation? If there is no technical limitation I think it would
be better to remove this restriction, I think it is limiting and the above
scenario is a good use case to show that.
This is not a technical limitation, it's just the way how it's supposed to
work. All the key events are dispatched to the component in focus, this is what
input focus is.
Scenario you described should be easier to implement in FX than in Swing. In
AWT/Swing, input events are dispatched to a single component, while FX is much
more flexible. All the events are delivered to a Scene first, then dispatched
to the focused component (or component under mouse, for mouse events), then
bubbled up back to the Scene. What you need is to register a custom event
filter for the scene and listen to all the key events.
See Scene.addEventFilter() and Scene.addEventHandler() for details.
Thanks,
Artem
Thanks, best regards,
