Shutter encapsulated button

class LoginButton extends StatelessWidget {
    
  final String title;
  final bool enable;
  final VoidCallback onPressed; //  Click callback 

  const LoginButton({
    Key key, this.title, this.enable = true, this.onPressed})
      : super(key: key);

  @override
  Widget build(BuildContext context) {
    
    return FractionallySizedBox(
      // FractionallySizedBox  Make in  ListView  Medium Button Full screen width 
      widthFactor: 1,
      child: MaterialButton(
        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(6)),
        height: 45,
        onPressed: enable ? onPressed : null,
        disabledColor: primary[50],
        color: primary,
        child: Text(title, style: TextStyle(color: Colors.white, fontSize: 16)),
      ),
    );
  }
}