changed up the way that ingredients can be added

lib/example_data.dart

@@ -0,0 +1,27 @@
+import 'package:rezepte/models/unit.dart';
+
+import 'models/ingredient.dart';
+import 'constants.dart' as constants;
+
+final List<Unit> _weightAndCount = constants.units
+    .where((element) =>
+        element.type == UnitType.weight || element.type == UnitType.count)
+    .toList();
+
+final List<Unit> _weight = constants.units
+    .where((element) => element.type == UnitType.weight)
+    .toList();
+
+final List<Unit> _count =
+    constants.units.where((element) => element.type == UnitType.count).toList();
+
+final List<Unit> _fluid =
+    constants.units.where((element) => element.type == UnitType.fluid).toList();
+
+final List<Ingredient> exampleIngredients = [
+  Ingredient(title: 'Karotte', possibleUnits: _weightAndCount),
+  Ingredient(title: 'Kartoffel', possibleUnits: _weightAndCount),
+  Ingredient(title: 'Kaffeebohnen', possibleUnits: _weight),
+  Ingredient(title: 'Milch', possibleUnits: _fluid),
+  Ingredient(title: 'Limettenblätter', possibleUnits: _count),
+];

lib/models/ingredient.dart

@@ -2,12 +2,12 @@ import 'unit.dart';
 
 class Ingredient {
   final String title;
-  List<Unit> possibleUnits = [];
+  List<Unit> possibleUnits;
-  List<String> preferredBrands = [];
+  List<String> preferredBrands;
 
   Ingredient({
     required this.title,
     required this.possibleUnits,
-    required this.preferredBrands,
+    this.preferredBrands = const [],
   });
 }

lib/models/unit.dart

@@ -9,8 +9,6 @@ class Unit {
 enum System { metric, imperial, neutral }
 
 enum UnitType {
-  metric,
-  imperial,
   fluid,
   weight,
   count,

lib/pages/create_recipe_page.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:rezepte/widgets/ingredients_bottomsheet.dart';
 import '../widgets/ingredients_widget.dart';
 
 import '../models/difficulty.dart';
@@ -43,9 +44,7 @@ class _CreateRecipeState extends State<CreateRecipe> {
             DifficultyDropdown(
               onChanged: _onChanged,
             ),
-            IngredientsWidget(
+            FloatingActionButton(onPressed: _openIngredientBottomSheet),
-              width: width * 0.9,
-            ),
           ],
         ),
       ),
@@ -55,4 +54,11 @@ class _CreateRecipeState extends State<CreateRecipe> {
   void _onChanged(int index) {
     _recipeDifficulty = Difficulty.values.elementAt(index);
   }
+
+  void _openIngredientBottomSheet() {
+    showModalBottomSheet(
+      context: context,
+      builder: (context) => const IngredientsBottomsheet(),
+    );
+  }
 }

lib/widgets/ingredients_bottomsheet.dart

@@ -0,0 +1,94 @@
+import 'package:flutter/material.dart';
+import '../constants.dart' as constants;
+import '../models/ingredient.dart';
+import '../models/unit.dart';
+import '../example_data.dart' as ea;
+
+class IngredientsBottomsheet extends StatefulWidget {
+  const IngredientsBottomsheet({super.key});
+
+  @override
+  State<IngredientsBottomsheet> createState() => _IngredientsBottomsheetState();
+}
+
+class _IngredientsBottomsheetState extends State<IngredientsBottomsheet> {
+  TextEditingController dropdownController = TextEditingController();
+  final List<DropdownMenuEntry<Unit>> unitEntries = [];
+  final List<DropdownMenuEntry<Ingredient>> ingredientEntries = [];
+  Unit? selectedUnit;
+  @override
+  Widget build(BuildContext context) {
+    return BottomSheet(
+      onClosing: onClosing,
+      builder: _bottomSheetContent,
+    );
+  }
+
+  @override
+  void initState() {
+    super.initState();
+    for (var unit in constants.units) {
+      unitEntries.add(DropdownMenuEntry(value: unit, label: unit.name));
+    }
+    for (var ingredient in ea.exampleIngredients) {
+      ingredientEntries
+          .add(DropdownMenuEntry(value: ingredient, label: ingredient.title));
+    }
+  }
+
+  void onClosing() {}
+
+  Widget _bottomSheetContent(BuildContext context) {
+    return Padding(
+      padding: EdgeInsets.only(
+        top: 20,
+        left: 10,
+        right: 10,
+        bottom: MediaQuery.of(context).viewInsets.bottom,
+      ),
+      child: Column(
+        children: [
+          Row(
+            children: [
+              Expanded(
+                flex: 4,
+                child: DropdownMenu<Ingredient>(
+                  dropdownMenuEntries: ingredientEntries,
+                  enableSearch: true,
+                  enableFilter: true,
+                  requestFocusOnTap: true,
+                ),
+              ),
+            ],
+          ),
+          Row(
+            children: [
+              Expanded(
+                child: TextField(
+                  maxLines: 1,
+                  onTapOutside: (_) =>
+                      FocusManager.instance.primaryFocus?.unfocus(),
+                  keyboardType: TextInputType.number,
+                  textInputAction: TextInputAction.next,
+                  decoration: InputDecoration(
+                    label: Text('Amount'),
+                  ),
+                ),
+              ),
+              DropdownMenu<Unit>(
+                label: const Text('Unit'),
+                width: 150,
+                requestFocusOnTap: true,
+                controller: dropdownController,
+                dropdownMenuEntries: unitEntries,
+                onSelected: (unit) => setState(() {
+                  selectedUnit = unit;
+                }),
+              )
+            ],
+          )
+        ],
+      ),
+    );
+  }
+}