FormBuilderSlider does not show up

[yehee]

I started with the example snippet of code from README, and it does not seem to be working. So, I am wondering if I'm missing some dependencies/attributes in order to use it correctly.
Here is the code I have in my project:

final GlobalKey<FormBuilderState> _fbKey = GlobalKey<FormBuilderState>();
...
FormBuilder(
  key: _fbKey,
  autovalidate: true,
  child: Column(
    children: <Widget>[
      ...
      FormBuilderSlider(
        attribute: "slider",
        min: 0.0,
        max: 10.0,
        initialValue: 7.0,
        divisions: 20,
        decoration: InputDecoration(
          labelText: "Number of somethings",
          fillColor: themeColor,
        ),
      ),
      ...
    ],
  ),
)

Currently, the code is compiling and I do not get any errors in the log. However, I do not see the slider part of the form. It is only invisible; I can still drag the 'invisible' slider around to change the value:

Dependencies in pubspec.yaml:

dependencies:
  flutter:
    sdk: flutter
  charts_flutter: 0.6.0
  flutter_xlider: 2.4.3
  flutter_email_sender: 2.0.3
  url_launcher: ^5.0.3
  flutter_form_builder: 3.2.0
  cupertino_icons: ^0.1.2

Let me know if you need any other information or clarification. Thanks in advance!

[danvick]

Hi Alice,
Sorry for the late response.
Is there any chance that your primary color is white?
The color of the slider usually takes the app's theme primaryColor

[danvick]

Thanks to this issue that you have raised, I have noticed some missing bits in the package which have been fixed as of v3.2.1. Feel free to try it out.
You can now change your activeColor and inactiveColor of the Slider widget.

Your contribution is appreciated, Alice.

[yehee]

You're right. The primaryColor is set to Colors.white. Thank you so much for your time, much appreciated!