CodeArea: -fx-background-color doesn't work.

[PavelTurk]

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-retn at openjdk.org> on behalf of PavelTurk <pavelturk2000 at gmail.com>
> *Date: *Monday, May 5, 2025 at 12:47
> *To: *openjfx-dev at openjdk.org <openjfx-dev at 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-retn at openjdk.org> <mailto:openjfx-dev-retn at openjdk.org> on behalf of PavelTurk <pavelturk2000 at gmail.com> <mailto:pavelturk2000 at gmail.com>
>     *Date: *Saturday, May 3, 2025 at 10:07
>     *To: *openjfx-dev at openjdk.org <openjfx-dev at openjdk.org> <mailto:openjfx-dev at 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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