[EXTERNAL] Looked-up color fails for -fx-background-color in JavaFX CSS file

[Duquette, Will (US 397J)]

The problem arises when I switch out the stylesheet for an active GUI, with code like this:

	root.getStylesheets().clear()
	root.getStylesheets().add(styleSheetURL)

It's the clear() that's the problem.  If add the new stylesheet and then remove the old one, no messages are produced.

I have a simple test program, if you'd like to have this submitted to a bug tracker.

Will Duquette

On 6/8/21, 1:33 PM, "openjfx-dev on behalf of Duquette, Will (US 397J)" <openjfx-dev-retn at openjdk.java.net on behalf of william.h.duquette at jpl.nasa.gov> wrote:

    Howdy!

    I'm migrating a code-base from JavaFX 8 to JavaFX 11, and I'm seeing some weird behavior.  I have some CSS that looks like this (in part)

    .root {
         -theme-button: #0679DE;
    }

    .button-primary {
         -fx-background-color: -theme-button;
    }

    It's been working great in JavaFX 8 for quite a long while.  When I load the same app, I get messages like this written to the console.

    Jun 08, 2021 10:40:07 AM javafx.scene.CssStyleHelper calculateValue
    WARNING: Caught 'java.lang.ClassCastException: class java.lang.String cannot be cast to class javafx.scene.paint.Paint (java.lang.String is in module java.base of loader 'bootstrap'; javafx.scene.paint.Paint is in module javafx.graphics at 11.0.11 of loader 'platform')' while converting value for '-fx-background-color' from rule '*.button-primary' in stylesheet file:/Users/will/github/dgs-tool/out/production/dgs-lib/dsn-dark.css

    Surprisingly, the color seems to still get set—but warnings written to the console are worrying.

    If I replace -theme-button with #0679DE in the .button-primary style, the message goes away.

    I'm seeing this for -fx-background-color and -fx-border-color, but not for any other places where I use looked-up colors.

    Any ideas?