buildDefaultIcon method

@override Widget buildDefaultIcon(BuildContext context, TDCheckboxGroupState? groupState, bool isSelected)

默认的checkBox icon

Implementation

@override
Widget buildDefaultIcon(
    BuildContext context, TDCheckboxGroupState? groupState, bool isSelected) {
  if (cardMode == true) {
    return Container();
  }
  TDRadioStyle? style;
  if (groupState is TDRadioGroupState) {
    style = (groupState.widget as TDRadioGroup).radioCheckStyle;
  }

  style = style ?? radioStyle;

  var size = 24.0;
  final theme = TDTheme.of(context);

  // 由于镂空圆没有现成icon，因而自己画一个`
  if (style == TDRadioStyle.hollowCircle) {
    return SizedBox(
      width: size,
      height: size,
      child: CustomPaint(
        painter: HollowCircle(!enable
            ? (isSelected ? theme.brandDisabledColor : theme.grayColor4)
            : isSelected
                ? theme.brandNormalColor
                : theme.grayColor4),
      ),
    );
  }

  IconData? iconData;
  switch (style) {
    case TDRadioStyle.check:
      iconData = isSelected ? TDIcons.check : null;
      break;
    case TDRadioStyle.square:
      iconData =
          isSelected ? TDIcons.check_rectangle_filled : TDIcons.rectangle;
      break;
    default:
      iconData = isSelected ? TDIcons.check_circle_filled : TDIcons.circle;
      break;
  }
  if (iconData != null) {
    return Icon(iconData,
        size: size,
        color: !enable
            ? (isSelected ? theme.brandDisabledColor : theme.grayColor4)
            : isSelected
                ? theme.brandNormalColor
                : theme.grayColor4);
  } else {
    return SizedBox(
      width: size,
      height: size,
    );
  }
}