Customize floatingLabelStyle for error in InputDecorationTheme

[BuyMyBeard]

Use case

I want to customize my TextField entirely through themeData so I don't have to create a specific widget as a wrapper for it.

Right now my form field looks like this:

InputDecorationTheme doesn't expose any parameters to customize textStyle of floatingLabel when validating textField with an error. I can't change the color of the floatingLabel when focused on the textField, and unfocusing it makes the label take the default dark theme error color.

Proposal

Give inputDecorationTheme optional parameters focusedErrorFloatingLabelStyle and errorFloatingLabelStyle.

[nate-thegrate]

It looks like a convenient floatingLabelStyle constructor won't be added anytime soon.

For now, the best solution is to extend the MaterialStateTextStyle class or to use its .resolveWith() constructor.