veilidchat/lib/theme/views/styled_widgets/styled_dropdown.dart

import 'package:async_tools/async_tools.dart';
import 'package:awesome_extensions/awesome_extensions_flutter.dart';
import 'package:flutter/material.dart';

import '../../models/models.dart';
import '../views.dart';

const _kStyledDropdownChanged = 'kStyledDropdownChanged';

class StyledDropdown<T> extends StatelessWidget {
  const StyledDropdown(
      {required List<DropdownMenuItem<T>> items,
      required T value,
      String? decoratorLabel,
      Future<void> Function(T)? onChanged,
      super.key})
      : _items = items,
        _onChanged = onChanged,
        _decoratorLabel = decoratorLabel,
        _value = value;

  @override
  Widget build(BuildContext context) {
    final theme = Theme.of(context);
    final scheme = theme.extension<ScaleScheme>()!;

    Widget ctrl = DropdownButton<T>(
        isExpanded: true,
        padding: const EdgeInsets.fromLTRB(4, 0, 4, 0).scaled(context),
        focusColor: theme.focusColor,
        dropdownColor: scheme.primaryScale.elementBackground,
        iconEnabledColor: scheme.primaryScale.appText,
        iconDisabledColor: scheme.primaryScale.appText.withAlpha(127),
        items: _items,
        value: _value,
        style: theme.textTheme.labelLarge,
        onChanged: _onChanged == null
            ? null
            : (value) {
                if (value == null) {
                  return;
                }
                singleFuture((this, _kStyledDropdownChanged), () async {
                  await _onChanged(value);
                });
              });
    if (_decoratorLabel != null) {
      ctrl = ctrl
          .paddingLTRB(0, 4.scaled(context), 0, 4.scaled(context))
          .decoratorLabel(context, _decoratorLabel);
    }
    return ctrl;
  }

  final List<DropdownMenuItem<T>> _items;
  final String? _decoratorLabel;
  final Future<void> Function(T)? _onChanged;
  final T _value;
}