Rating: half star support (proposal)

[jmckerral]

Hey!

While using the Rating component, I observed that the behaviour for non-integers is to simply truncate any decimal points. For example, ratings of 4.2, 4.5, and 4.9 will all be shown as four stars.

I propose we add support to display half stars. This can be activated with an optional boolean property that defaults to false so that existing behaviour is preserved (similar to readonly).

We should also add halficon (or similar) support into the template/slots.

We may also wish to add some sort of rounding behaviour, which would either apply when activating half stars, or could be another new property.

Excluded:

• Half value input. Propose the change is for display only. Perhaps the option could be active only in readonly mode? Otherwise the behaviour may be a little weird (see a half star, choose a different value, be unable to get the original value back).

I can make these changes - I just wanted to check for existing thoughts/previous attempts/suggestions/best practices/advice/etc

All thoughts/feelings/hopes/dreams are welcome.

Cheers,

James

[joaomarcelofm]

There was an attempt to do it a while back, but it was rejected and never made it to the roadmap, it looks like. 😞
primefaces/primevue#1144

[slavco86]

Yeah, 3 years after - still no feature, but the PR was closed with "We prefer to do it ourselves" comment :face_palm

[jmckerral]

oh, interesting, I didn't see that - thanks! I would still gladly spend some time on this but, of course, I'd like the odds of that time not being wasted to be a little higher than I judge them currently to be (hence the speculative question 😅)

[slavco86]

Yeah, it's a shame this is not current functionality. I think the easiest solution would be just to get rid of the rounding logic inside the component and just keep the decimal part of the value when exposing it via scoped slots.

So, for example if I pass 3.5 value via the v-model inside the #onicon slot value prop - I'd get 1.5, 2.5 and 3.5, instead of as currently we get 1,2 and 3 🤔

[slavco86]

@cagataycivici , is it possible to look at this request again, please?
Seems like a fairly easy win and will cover a pretty standard and widespread use case for such a UI pattern, like rating. 🙏

[joaomarcelofm]

@tugcekucukoglu, do you know if this feature will ever be available or, perhaps more importantly, if the Prime team is open to a new PR to address this request?