It is still possible with a custom attribute using public API CellContext.getNode().
Take a look at RichTextArea:2404 cx.getNode().getStyleClass().addAll(names); It's not a recommended way generally, since your implementation must take steps to avoid interference with the RichTextArea default behavior (editing, copying, pasting, etc.) -andy From: PavelTurk <[email protected]> Date: Monday, April 6, 2026 at 05:05 To: [email protected] <[email protected]> Subject: Re: [External] : What is the right way to set styles in RichTextArea when the user can change the theme? Hello, Andy! Thank you very much for your reply! The solution you provided helped. However, in this case, my CSS styles are hardcoded. Could you let me know if there are any plans to support styling text in editable RichTextArea using CSS classes? Best regards, Pavel On 4/3/26 18:32, Andy Goryachev wrote: > Dear > Pavel: > > Thank > you for > your > feedback! > > Right > now, I > think > the only > one way > is > a custom > attribute. > Take a > look at > this > example, > where a > custom > CSS_CHAR > attribute > is used > with a > custom > RichTextArea > that > adds > support > for it: > > https://github.com/andy-goryachev-oracle/Test/blob/main/src/goryachev/research/RichTextArea_CustomAttributes_Example.java > > Keep in > mind > that > there > could be > only one > such > attribute > set on a > text > segment > (even > though > the > attribute > value > may > specify > multiple > -fx- > properties). > This > means > you need > to > implement > your own > logic to > merge > the > values > if you > want to > "apply" > a > property > to a > selection. > > Hope > this > helps. > Let me > know how > if it > works in > your use > case. > > Thanks, > -andy > > > > > *From: > *PavelTurk > <[email protected]> > *Date: > *Friday, > April 3, > 2026 at > 07:12 > *To: > *[email protected] > <[email protected]> > *Subject: > *[External] > : What > is the > right > way to > set > styles > in > RichTextArea > when the > user can > change > the > theme? > > Hi > everyone, > I have a > question > about > working > with > styles > when the > user can > change > the > theme > (for > example, > from > light to > dark, or > even > within > different > dark > variants). > > Here’s > the > situation: > I’m > building > a simple > console > where > the user > enters > commands, > the > commands > are > executed, > and > output > is > displayed > with > styling. > With > RichTextFX, > it was > simple — > I just > added a > piece of > text and > assigned > a CSS > class. > When the > user > changed > the > theme, > all the > styles > updated > automatically. > > Now I’m > trying > to do > something > similar > with JFX > RichTextArea, > but > unfortunately > I > haven’t > figured > out how > yet. The > only API > I found > for > working > with CSS > styles > is > RichParagraph.builder(). > But as > far as I > understand, > it’s > supposed > to be > used > only > with > SyntaxDecorator. > That’s > fine in > theory, > but in > that > case I > would > have to > store > the > model of > my > command > output, > which > would > significantly > complicate > things. > > On the > other > hand, > there is > SimpleViewOnlyStyledModel, > but as I > understand > it, > that’s > for > read-only > text, > which > doesn’t > suit my > needs. > > Could > someone > suggest > which > API I > should > use for > my case? > > Best > regards, > Pavel
