[Snackbar] action text color can't be changed

[y0hami]

Steps to Reproduce

1. Create a Snackbar with an action

Scaffold
  .of(context)
  .showSnackBar(new SnackBar(
    content: new Text('Snackbar action'),
    action: new SnackBarAction(
      label: 'Undo',
      onPressed: () {
        // do something
      },
    ),
  ))
;

2. Change your accent color to something dark (or the same color as the Snackbar background)
3. Show the Snackbar

The only way to change the action button text is to change your accent color in your theme. If you have a dark accent color this will lead to being unable to use Snackbar actions.

[zoechi]

You can wrap SnackBar or Text with a theme different from the apps theme or pass a TextTheme to Text.

[y0hami]

Wrapping the SnackbarAction with a theme may work but wouldn't it make more sense to pass a Text widget to the SnackBarAction instead of the SnackBarAction creating it from the string passed? https://github.com/flutter/flutter/blob/master/packages/flutter/lib/src/material/snack_bar.dart#L120

[najeira]

showSnackBar requires SnackBar object, SnackBar.action is SnackBarAction not Widget. So, it can not be wrapped.

[firsthour]

A nice improvement would be to make "label" a widget, so we could use an Icon or Text.

But the reason I landed here in the first place was because I wanted to change the text color.

[p6r7z]

Just add 3 lines of code

to flutter snack_bar.dart from flutter sdk show in this picture

[najeira]

WIP #22489

[alexandergottlieb]

At the moment there's no way to change other text theme properties like fontWeight either. I'd really appreciate label being a Text if possible? Or making it so we can wrap a DefaultTextStyle somewhere between SnackBar and SnackBarAction

[gitmathub]

It seems not to be merged yet.

[ayalma]

If we can set action button text style from outside, that's will be awesome