thumbIcon property

Implementation

WidgetStateProperty<Icon?>? get thumbIcon {
  /// Determine if the current theme is light or dark.
  final isLightTheme = Theme.of(context).brightness == Brightness.light;

  return WidgetStateProperty.resolveWith<Icon?>((Set<WidgetState> states) {
    /// If the Switch is both disabled and selected.
    if (states.contains(WidgetState.disabled) &&
        states.contains(WidgetState.selected)) {
      return Icon(Icons.check,
          color: isLightTheme ? Colors.grey[400] : Colors.black87);
    }

    /// If the Switch is selected.
    if (states.contains(WidgetState.selected)) {
      return const Icon(Icons.check, color: Colors.black);
    }

    /// If the Switch is disabled.
    if (states.contains(WidgetState.disabled)) {
      return Icon(Icons.close,
          color: isLightTheme ? Colors.grey[200] : Colors.grey[600]);
    }

    /// Default case: Return a close icon with a fixed white color.
    return const Icon(Icons.close, color: Colors.white);
  });
}