Widget build()

in packages/diagrams/lib/src/toggle_buttons.dart [47:151]
103 lines of code
13 McCabe index (conditional complexity)

  Widget build(BuildContext context) {
    Widget returnWidget;
    switch (widget.name) {
      case _toggleButtonsSimple:
        returnWidget = ToggleButtons(
          children: <Widget>[
            Icon(Icons.ac_unit, key: _iconKeys[0]),
            Icon(Icons.call, key: _iconKeys[1]),
            Icon(Icons.cake, key: _iconKeys[2]),
          ],
          onPressed: (int index) {
            setState(() {
              isSelected[index] = !isSelected[index];
            });
          },
          isSelected: isSelected,
        );
        break;
      case _toggleButtonsRequired:
        returnWidget = ToggleButtons(
          children: <Widget>[
            Icon(Icons.ac_unit, key: _iconKeys[0]),
            Icon(Icons.call, key: _iconKeys[1]),
            Icon(Icons.cake, key: _iconKeys[2]),
          ],
          onPressed: (int index) {
            int count = 0;
            for (int index = 0; index < isSelected.length; index++) {
              if (isSelected[index]) {
                count += 1;
              }
            }

            if (isSelected[index] && count < 2) {
              return;
            }
            setState(() {
              isSelected[index] = !isSelected[index];
            });
          },
          isSelected: isSelected,
        );
        break;
      case _toggleButtonsMutuallyExclusive:
        returnWidget = ToggleButtons(
          children: <Widget>[
            Icon(Icons.ac_unit, key: _iconKeys[0]),
            Icon(Icons.call, key: _iconKeys[1]),
            Icon(Icons.cake, key: _iconKeys[2]),
          ],
          onPressed: (int index) {
            setState(() {
              for (int buttonIndex = 0;
                  buttonIndex < isSelected.length;
                  buttonIndex++) {
                if (buttonIndex == index) {
                  isSelected[buttonIndex] = !isSelected[buttonIndex];
                } else {
                  isSelected[buttonIndex] = false;
                }
              }
            });
          },
          isSelected: isSelected,
        );
        break;
      case _toggleButtonsRequiredMutuallyExclusive:
        returnWidget = ToggleButtons(
          children: <Widget>[
            Icon(Icons.ac_unit, key: _iconKeys[0]),
            Icon(Icons.call, key: _iconKeys[1]),
            Icon(Icons.cake, key: _iconKeys[2]),
          ],
          onPressed: (int index) {
            setState(() {
              for (int buttonIndex = 0;
                  buttonIndex < isSelected.length;
                  buttonIndex++) {
                if (buttonIndex == index) {
                  isSelected[buttonIndex] = true;
                } else {
                  isSelected[buttonIndex] = false;
                }
              }
            });
          },
          isSelected: isSelected,
        );
        break;
      default:
        returnWidget = const Text('Error');
        break;
    }

    return ConstrainedBox(
      key: UniqueKey(),
      constraints: BoxConstraints.tight(const Size(400, 100)),
      child: Container(
        alignment: FractionalOffset.center,
        padding: const EdgeInsets.all(5.0),
        color: Colors.white,
        child: returnWidget,
      ),
    );
  }