“The style 'dropShadowVisible' is only supported by type 'mx.controls.List' with the theme(s) 'spark'” Flex theme warning

Question

What can I do to remove this warning in Flex? I'm using the Halo theme and do not want to use the Spark theme.

The style 'dropShadowVisible' is only supported by type 'mx.controls.List' with the theme(s) 'spark'

Answer 1

Two options:

1) Set the compiler argument 'warnings' to false. More info about compiler arguments are in the docs. Other compiler arguments that related to this are show-actionscript-warnings and warn-warning_type.

2) Make sure all the classes you're using do not reference the dropShadowVisible style. Most likely it is used internally be Flex Framework classes that you are using in your app; so that may require some extending.

Answer 2

This post might give you some insight.(I have not verified the solution posted there).I advise you to take a backup copy of the framework.swc mentioned before you make changes.This bug filed in the adobe bug repository also has some information

Answer 3

The problem arises whenever you use an mx|List, in an app with the Spark theme, and with SDK 4.0 or 4.1. The Adobe bug mentioned earlier has been fixed, and the fix is in SDK 4.5.