Flutter/Dart: Cast int to double in Widget Param not working

Question

I'm trying casting a int to double in flutter/dart at param fontSize from Text Widget but I have this exception:

"Another exception was thrown: type 'int' is not a subtype of type 'double' in type cast"

I have been follow the instructions here: Why can't I convert a Number into a Double? but that's not working yet.

here is Text inside my component widget:

class ButtonLogin extends MaterialButton {
  ButtonLogin({this.fontSize, ...});

final fontSize;
...

@override
Widget build(BuildContext context){
double fontSizeDouble = (fontSize as num) as double; 
...
Text(
 label,
 style: TextStyle(
   fontSize: fontSizeDouble,
   color: labelColor,
   fontWeight: FontWeight.bold
 ),
),
...
}

Out from component I'm passing at param fontSize a Int value like this:

...
 ButtonLogin(
      backgroundColor: ColorsCustom.loginScreenUp,
      labelColor: Colors.white,
      label: 'Back to other session?',
      fontSize: 16,
      mOnPressed: () => _login(),
 );
...

the ellipsis is just to indicate there is more of code, its not part of code.

Answer 1

I am not getting any error. An advice I can give you to avoid errors is to use data types in your code when you define variables.