Hi Artem, Richard, Thanks for your feedback! There's one more thing which further complicates things and that I've forgot to mention. The chart is embedded in a swing app, so doing as Artem suggests will not work: the scene will have to be focused in order for it to receive keyboard events, right?
Thanks, best regards, On Mon, Oct 7, 2013 at 3:53 PM, Richard Bair <richard.b...@oracle.com>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) > > > 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, > >> > -- Pedro Duque Vieira
