Flutter TextStyle / fontSize - flutter

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,),

Answer 2

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

Answer 3

Can you maybe tell me how I use this in the "hintText:" of a "TextField ("?
when I do it like this
hintStyle: StyledText (
color: Colors.black,
),
then I get the error
"The argument type 'StyledText' can't be assigned to the parameter
type 'TextStyle?'. (Documentation)"
I have adapted your code so that it works so far, thank you again for that 😊 .. would only like to use it with the "hintStyle"
import 'package: flutter / cupertino.dart';
import 'package: flutter / material.dart';
import 'package: google_fonts / google_fonts.dart';
class StyledText extends Text {
StyledText (
String title,
{
double fontSize = 10.5,
color = Colors.white,
fontWeight = FontWeight.w100,
letterSpacing = 0.5,
textAlign: TextAlign.center,
})
: super (title,
style: GoogleFonts.getFont (
'Unica One',
fontSize: fontSize,
color: color,
fontWeight: fontWeight,
letterSpacing: 0.5,
),
textAlign: textAlign,
);
}