Flutter TextStyle / fontSize

Question

I would like the TextStyle / fontSize to simplify my app.

for this it would be necessary to make the line "

fontSize: Get.width * .030,

" of the attached code available, similar to the color "

{Color color = Colors.white}

This is the code I want to customize ...

TextStyle _textStyle({Color color = Colors.white}) {
  return GoogleFonts.getFont(
    'Unica One',
    fontSize: Get.width * .030,
    color: color,
    letterSpacing: 0.5,
  );
}

And it should look something like that, but unfortunately I don't know exactly how to put it together correctly

TextStyle _textStyle({Color color = Colors.white}{FontSize fontSize = Get.width * .030}) {
  return GoogleFonts.getFont(
    'Unica One',
    fontSize: fontSize,
    color: color,
    letterSpacing: 0.5,
  );
}

Answer 1

Text class with style,

class StoryText extends Text {
  StoryText(String title, {Color mColor, double mFontSize})
      : super(title,
            style: GoogleFonts.getFont(
              'Unica One',
              fontSize: mFontSize,
              color: mColor,
              letterSpacing: 0.5,
            ));
}

// Use of above class
StoryText('title', mColor: Colors.red, mFontSize: Get.width * .030,),