fillColor property
final
The color that fills the radio button, in all MaterialStates.
Resolves in the following states:
This example resolves the fillColor based on the current MaterialState
of the Radio, providing a different
link
Color
when it is
MaterialState.disabled.
Radio<int>(
value: 1,
groupValue: 1,
onChanged: (_){},
fillColor: MaterialStateProperty.resolveWith<Color>((Set<MaterialState> states) {
if (states.contains(MaterialState.disabled)) {
return Colors.orange.withOpacity(.32);
}
return Colors.orange;
})
)
If null, then the value of activeColor is used in the selected state. If that is also null, then the value of RadioThemeData.fillColor is used. If that is also null and ThemeData.useMaterial3 is false, then ThemeData.disabledColor is used in the disabled state, ColorScheme.secondary is used in the selected state, and ThemeData.unselectedWidgetColor is used in the default state; if ThemeData.useMaterial3 is true, then ColorScheme.onSurface is used in the disabled state, ColorScheme.primary is used in the selected state and ColorScheme.onSurfaceVariant is used in the default state.
Implementation
final MaterialStateProperty<Color?>? fillColor;