delete checklists

lib/pages/dashboard_page.dart

@@ -7,6 +7,7 @@ import 'package:provider/provider.dart';
 
 class DashboardPage extends StatefulWidget {
   const DashboardPage({super.key});
+
   static const routeName = '/dashboard';
 
   @override
@@ -15,11 +16,79 @@ class DashboardPage extends StatefulWidget {
 
 class _DashboardPageState extends State<DashboardPage> {
   final Future<List<Checklist>> checklistFuture = DbHelper.fetchChecklist;
+  late List<Checklist> checklists;
   late ChecklistProvider checklistProvider;
 
-  @override
+  int? _selectedChecklistIndex;
-  void initState() {
+
-    super.initState();
+  FloatingActionButton get _fabBuilder {
+    if (_selectedChecklistIndex == null) {
+      return FloatingActionButton(
+        onPressed: _onAddTapped,
+        child: const Icon(Icons.add),
+      );
+    }
+    return FloatingActionButton(
+      onPressed: _onDeleteTapped,
+      backgroundColor: Theme.of(context).colorScheme.error,
+      child: Icon(Icons.delete, color: Theme.of(context).colorScheme.onError),
+    );
+  }
+
+  Widget _futureBuilder(
+      BuildContext context, AsyncSnapshot<List<Checklist>> snapshot) {
+    if (snapshot.hasData) {
+      checklists = snapshot.data!;
+      return ListView.builder(
+        itemCount: snapshot.data!.length,
+        itemBuilder: (context, index) =>
+            _listBuilder(context, index, snapshot.data!),
+      );
+    } else if (snapshot.hasError) {
+      return Text(snapshot.error.toString());
+    } else {
+      return const CircularProgressIndicator();
+    }
+  }
+
+  Widget? _listBuilder(BuildContext context, int index, List<Checklist> list) {
+    Checklist cl = list.elementAt(index);
+    return ListTile(
+      title: Text(cl.title == '' ? 'Unnamed ${cl.id}' : cl.title),
+      subtitle: Text(cl.description),
+      onTap: () => _onListEntryTapped(cl, index),
+      onLongPress: () => _onLongPress(index),
+      selected: _selectedChecklistIndex == index,
+    );
+  }
+
+  void _onAddTapped() {
+    DbHelper.addOrUpdateChecklist(null).then((id) {
+      checklistProvider.updateSelectedChecklist(id, silent: true);
+    }).whenComplete(
+        () => Navigator.of(context).pushNamed(DetailChecklistPage.routeName));
+  }
+
+  void _onListEntryTapped(Checklist cl, int index) {
+    if (_selectedChecklistIndex == index) {
+      setState(() => _selectedChecklistIndex = null);
+    } else if (_selectedChecklistIndex != null) {
+      setState(() => _selectedChecklistIndex = index);
+    } else {
+      checklistProvider.updateSelectedChecklist(cl.id, silent: true);
+      Navigator.of(context).pushNamed(DetailChecklistPage.routeName);
+    }
+  }
+
+  void _onLongPress(int index) {
+    setState(() {
+      _selectedChecklistIndex = index;
+    });
+  }
+
+  void _onDeleteTapped() {
+    DbHelper.deleteChecklistByid(
+        checklists.elementAt(_selectedChecklistIndex!).id);
   }
 
   @override
@@ -39,46 +108,6 @@ class _DashboardPageState extends State<DashboardPage> {
           future: checklistFuture,
           builder: _futureBuilder,
         ),
-      floatingActionButton: FloatingActionButton(
+        floatingActionButton: _fabBuilder);
-        onPressed: _onAddTapped,
-        child: const Icon(Icons.add),
-      ),
-    );
-  }
-
-  Widget _futureBuilder(
-      BuildContext context, AsyncSnapshot<List<Checklist>> snapshot) {
-    if (snapshot.hasData) {
-      return ListView.builder(
-        itemCount: snapshot.data!.length,
-        itemBuilder: (context, index) =>
-            _listBuilder(context, index, snapshot.data!),
-      );
-    } else if (snapshot.hasError) {
-      return Text(snapshot.error.toString());
-    } else {
-      return const CircularProgressIndicator();
-    }
-  }
-
-  Widget? _listBuilder(BuildContext context, int index, List<Checklist> list) {
-    Checklist cl = list.elementAt(index);
-    return ListTile(
-      title: Text(cl.title == '' ? 'Unnamed ${cl.id}' : cl.title),
-      subtitle: Text(cl.description),
-      onTap: () => _onListEntryTapped(cl),
-    );
-  }
-
-  void _onAddTapped() {
-    DbHelper.addOrUpdateChecklist(null).then((id) {
-      checklistProvider.updateSelectedChecklist(id, silent: true);
-    }).whenComplete(
-        () => Navigator.of(context).pushNamed(DetailChecklistPage.routeName));
-  }
-
-  void _onListEntryTapped(Checklist cl) {
-    checklistProvider.updateSelectedChecklist(cl.id, silent: true);
-    Navigator.of(context).pushNamed(DetailChecklistPage.routeName);
   }
 }

lib/services/dbhelper.dart

@@ -148,6 +148,11 @@ class DbHelper {
     await _client.from(itemsTableName).delete().in_('id', ids);
   }
 
+  static Future<void> deleteChecklistByid(int id) async {
+    await _client.from(itemsTableName).delete().eq('checklist_id', id);
+    await _client.from(checklistsTableName).delete().eq('id', id);
+  }
+
   static Stream<AuthState> get authChangeEventStream =>
       _client.auth.onAuthStateChange;
 }