To be as clear as possible, here's what I need:

.test {
     -fx-set-somehow-background-color: green;
}

var builder = RichParagraph.builder();
builder.addWithStyleNames(segment, "test");

because, in parallel for RTFX I simply use its stylesheet:

.test {
     -rtfx-background-color: green;
}


So, for both code areas, I use same style classes for styling paragraph 
segments.

Best regards, Pavel

On 5/5/25 23:20, Andy Goryachev wrote:

Right, the API are missing currently.  I just point out the fact that you must 
use highlights for the purpose of highlighting text range(s) within the 
paragraph, since these ranges might contain semi-transparent Nodes.  Once 
JDK-8355774 is fixed you'll be able to style highlights with CSS and all will 
be well.  Right?

-andy

*From: *openjfx-dev <openjfx-dev-r...@openjdk.org> on behalf of PavelTurk 
<pavelturk2...@gmail.com>
*Date: *Monday, May 5, 2025 at 13:10
*To: *openjfx-dev@openjdk.org <openjfx-dev@openjdk.org>
*Subject: *Re: CodeArea: -fx-background-color doesn't work.

Andy, thank you very much for your help.

That doesn’t work for me. As I mentioned before, I’m working with two CodeArea 
implementations - JFX and RTFX,
and CSS is the common styling mechanism. I can’t use code for one and CSS for 
the other.

Well, technically I could, but it just wouldn’t make any sense.

Best regards, Pavel

On 5/5/25 22:54, Andy Goryachev wrote:

    You have to use highlights for that, since you can't assign CSS style to a 
part of the Text instance, and you can't set a background on it.

    JDK-8355774 is pretty high on my list of things to do.

    -andy

    *From: *openjfx-dev <openjfx-dev-r...@openjdk.org> 
<mailto:openjfx-dev-r...@openjdk.org> on behalf of PavelTurk <pavelturk2...@gmail.com> 
<mailto:pavelturk2...@gmail.com>
    *Date: *Monday, May 5, 2025 at 12:47
    *To: *openjfx-dev@openjdk.org <openjfx-dev@openjdk.org> 
<mailto:openjfx-dev@openjdk.org>
    *Subject: *Re: CodeArea: -fx-background-color doesn't work.

    Hello, Andy

    Yes, I need to add a background color for a text segment within a paragraph 
using CSS.

    I have just opened an issue with ID : 9078469.

    Can anyone give an estimate of when this issue might be addressed? 
Background color is such a fundamental feature
    that it's impossible to work without it.

    Best regards, Pavel

    On 5/5/25 22:09, Andy Goryachev wrote:

        Dear Pavel:

        Can you clarify what you are trying to do exactly?

        If you are trying to add a background to a text segment within the 
paragraph (as your code seem to indicate), then the only way to do it is to 
call Builder.addHighlight().

        If you are trying to set the background of the whole paragraph, you've 
hit another missing API similar to JDK-8355774 - there is currently no way to 
style the paragraphs via CSS.  There is the 
Builder.setParagraphAttributes(StyleAttributeMap) but a CSS one is missing.

        -andy

        *From: *openjfx-dev <openjfx-dev-r...@openjdk.org> 
<mailto:openjfx-dev-r...@openjdk.org> on behalf of PavelTurk <pavelturk2...@gmail.com> 
<mailto:pavelturk2...@gmail.com>
        *Date: *Saturday, May 3, 2025 at 10:07
        *To: *openjfx-dev@openjdk.org <openjfx-dev@openjdk.org> 
<mailto:openjfx-dev@openjdk.org>
        *Subject: *CodeArea: -fx-background-color doesn't work.

        For styling CodeArea, I use exclusively style classes, and this is the 
foundation of my entire architecture.
        Today I tried to implement search highlighting (via background color), 
but it didn't work. Below is my test code.

        Can anyone tell me how to set the background color using CSS? For 
example, in RichTextFX's CodeArea,
        they have -rtfx-background-color.

        public class JfxCodeArea extends Application {

             @Override
             public void start(Stage primaryStage) throws Exception {
                 String text = """
                               Lorem ipsum dolor sit amet, consectetur 
adipiscing elit, sed do eiusmod tempor incididunt
                               ut labore et dolore magna aliqua. Ut enim ad 
minim veniam, quis nostrud exercitation ullamco
                               laboris nisi ut aliquip ex ea commodo consequat. 
Duis aute irure dolor in reprehenderit
                               in voluptate velit esse cillum dolore eu fugiat 
nulla pariatur.
                               """;

                 String css = """
                     .test {
                         -fx-font-weight: bold;
                         -fx-fill: red;
                         -fx-background-color: green;
                     }

                 """;
                 String data = "data:text/css;base64," + 
Base64.getEncoder().encodeToString(css.getBytes(StandardCharsets.UTF_8));

                 CodeArea codeArea = new CodeArea();
                 codeArea.getStylesheets().add(data);

                 codeArea.setSyntaxDecorator(new SyntaxDecorator() {
                     @Override
                     public RichParagraph createRichParagraph(CodeTextModel 
model, int index) {
                         var builder = RichParagraph.builder();
                         builder.addWithStyleNames(model.getPlainText(index), 
"test");
                         return builder.build();
                     }

                     @Override
                     public void handleChange(CodeTextModel m, TextPos start, 
TextPos end, int charsTop, int linesAdded, int charsBottom) {

                     }
                 });

                 VBox.setVgrow(codeArea, Priority.ALWAYS);
                 var button = new Button("Go!");
                 button.setOnAction(e -> codeArea.setText(text));
                 VBox root = new VBox(codeArea, button);
                 Scene scene = new Scene(root, 600, 200);
                 primaryStage.setScene(scene);
                 primaryStage.show();

             }

             public static void main(String[] args) {
                 launch(args);
             }
        }

        Best regards, Pavel

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