Accessing css custom theme constant from code

Question

I wonder whether it's possible to retrieve custom constant values set in the css file from the java code.

I went through the UIManager.themeConstants (as well as themeProps, you never know :)) but I could not find my custom constants in there.

I tried the following:

#Constants {
    --color0: #C4DFE6;
}

int color = UIManager.getInstance().getThemeConstant("--color0", 0);
                System.out.println("COLOR0=" + color);
                color = UIManager.getInstance().getThemeConstant("color0", 1);
                System.out.println("COLOR0=" + color);
                color = UIManager.getInstance().getThemeConstant("var(--color0)", 2);
                System.out.println("COLOR0=" + color);
                color = UIManager.getInstance().getThemeConstant("var(color0)", 3);
                System.out.println("COLOR0=" + color);

I was hoping one of them to return my value: 0xC4DFE6.

Shai Almog Shai Almog · Accepted Answer · 2019-05-29T02:55:24

The -- syntax is a special case for use within the CSS. Try using MyColor in the CSS with the same syntax in the Java side and it should work.

Accessing css custom theme constant from code

1 Answers