Re: [Flightgear-devel] Listener not firing, 10Hz nasal loop harmful?

[Benedikt H. <be...@ha...>]

Hm, and what is your advice for me in this instance then?

> Am 06.06.2023 um 12:46 schrieb James Turner <ja...@fl...>:
> 
> 
> 
>>> On 6 Jun 2023, at 08:34, Benedikt Hallinger <be...@ha...> wrote:
>>> 
>>> i stripped down the code to a basic example. and that seems to work.
>>> 
>> 
>> 	That is slightly what I expected, and re-assuring (waring my core-maintainer hat)
>> 
>> When i have a Prop node A, and it changes its value, do the aliased props also fire a listener?
>> 
>> A<-alias B     setlistener(B)
>> When A changes, the new value can be read from B; but does an setlistener to B also fire when the underlaying prop A changes?
> 
> I thought this did work, but apparently it does not : aliases are bit liked tied properties in this regard.
> 
> We could fix this, it would require SGPropertyNode::alias to chain to its target’s listeners. (Target nodes don’t know they are aliased, so we can’t ‘forward fire’ the aliases)
> 
> I suspect people have mostly just worked around this (now I think, I have worked around it once myself) … but it breaks the useful-ness / abstraction of aliasing quite badly.
> 
> Kind regards,
> James