39 lines
1.2 KiB
Dart
39 lines
1.2 KiB
Dart
import 'package:flutter/material.dart';
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import '../../formula_models.dart';
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import '../../corpus.dart';
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class UnitDropdown extends StatelessWidget {
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final UnitCorpus corpus;
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final VariableSpec variable;
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final String? selectedUnit;
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final ValueChanged<String?> onUnitChanged;
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const UnitDropdown({
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super.key,
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required this.corpus,
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required this.variable,
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required this.selectedUnit,
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required this.onUnitChanged,
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});
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@override
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Widget build(BuildContext context) {
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final unitNames = corpus.unitsOfSameMagnitude(variable.unit);
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final availableUnits = unitNames.map((name) => corpus.get(name)).toList();
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return DropdownButton<String>(
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value: selectedUnit ?? variable.unit,
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icon: const Icon(Icons.arrow_drop_down),
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elevation: 16,
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style: TextStyle(color: Theme.of(context).colorScheme.primary, fontSize: 14),
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underline: Container(height: 1, color: Theme.of(context).dividerColor),
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onChanged: onUnitChanged,
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items: availableUnits.map<DropdownMenuItem<String>>((UnitSpec unit) {
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return DropdownMenuItem<String>(
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value: unit.name,
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child: Text(unit.symbol, style: const TextStyle(fontSize: 14)),
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);
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}).toList(),
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);
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}
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}
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