Snackbars for all actions (#30)

lib/fragments/namespace.dart

@@ -55,8 +55,10 @@ class _NamespaceFragmentState extends State<NamespaceFragment> {
               onRefresh: _updateLists,
             )
           : Center(child: CircularProgressIndicator()),
-      floatingActionButton: FloatingActionButton(
+      floatingActionButton: Builder(
-          onPressed: () => _addListDialog(), child: const Icon(Icons.add)),
+          builder: (context) => FloatingActionButton(
+            onPressed: () => _addListDialog(context), child: const Icon(Icons.add))
+      ),
     );
   }
 
@@ -88,23 +90,28 @@ class _NamespaceFragmentState extends State<NamespaceFragment> {
         MaterialPageRoute(builder: (context) => ListPage(taskList: list)));
   }
 
-  _addListDialog() {
+  _addListDialog(BuildContext context) {
     showDialog(
       context: context,
       builder: (_) => AddDialog(
-          onAdd: _addList,
+          onAdd: (name) => _addList(name, context),
           decoration: new InputDecoration(
               labelText: 'List Name', hintText: 'eg. Shopping List')),
     );
   }
 
-  _addList(String name) {
+  _addList(String name, BuildContext context) {
     VikunjaGlobal.of(context)
       .listService
       .create(widget.namespace.id, TaskList(id: null, title: name, tasks: []))
       .then((_) {
         setState(() {});
         _updateLists();
+        Scaffold.of(context).showSnackBar(
+          SnackBar(
+            content: Text('The list was successfully created!'),
+          ),
+        );
     });
   }
 }

lib/pages/home_page.dart

@@ -36,21 +36,26 @@ class HomePageState extends State<HomePage> {
     Navigator.of(context).pop();
   }
 
-  _addNamespaceDialog() {
+  _addNamespaceDialog(BuildContext context) {
     showDialog(
         context: context,
         builder: (_) => AddDialog(
-              onAdd: _addNamespace,
+              onAdd: (name) => _addNamespace(name, context),
               decoration: new InputDecoration(
                   labelText: 'Namespace', hintText: 'eg. Personal Namespace'),
             ));
   }
 
-  _addNamespace(String name) {
+  _addNamespace(String name, BuildContext context) {
     VikunjaGlobal.of(context)
         .namespaceService
         .create(Namespace(id: null, name: name))
-        .then((_) => _updateNamespaces());
+        .then((_) {
+          _updateNamespaces();
+          Scaffold.of(context).showSnackBar(SnackBar(
+            content: Text('The namespace was created successfully!'),
+          ));
+    });
   }
 
   Future<void> _updateNamespaces() {
@@ -113,10 +118,12 @@ class HomePageState extends State<HomePage> {
                   )),
         new Align(
           alignment: FractionalOffset.bottomCenter,
-          child: new ListTile(
+          child: Builder(
-            leading: const Icon(Icons.add),
+            builder: (context) => ListTile(
-            title: const Text('Add namespace...'),
+              leading: const Icon(Icons.add),
-            onTap: () => _addNamespaceDialog(),
+              title: const Text('Add namespace...'),
+              onTap: () => _addNamespaceDialog(context),
+            ),
           ),
         ),
       ])),

lib/pages/list_edit_page.dart

@@ -105,19 +105,17 @@ class _ListEditPageState extends State<ListEditPage> {
     VikunjaGlobal.of(context).listService.update(updatedList)
       .then((_) {
         setState(() => _loading = false);
-        final scaffold = Scaffold.of(context);
+        Scaffold.of(context).showSnackBar(SnackBar(
-        scaffold.showSnackBar(SnackBar(
           content: Text('The list was updated successfully!'),
         ));
       })
       .catchError((err) {
         setState(() => _loading = false);
-        final scaffold = Scaffold.of(context);
+        Scaffold.of(context).showSnackBar(
-        scaffold.showSnackBar(
           SnackBar(
             content: Text('Something went wrong: ' + err.toString()),
             action: SnackBarAction(
-                label: 'CLOSE', onPressed: scaffold.hideCurrentSnackBar),
+                label: 'CLOSE', onPressed: Scaffold.of(context).hideCurrentSnackBar),
           ),
         );
       });

lib/pages/list_page.dart

@@ -32,7 +32,7 @@ class _ListPageState extends State<ListPage> {
   @override
   void didChangeDependencies() {
     super.didChangeDependencies();
-    _updateList();
+    _loadList();
   }
 
   @override
@@ -59,12 +59,13 @@ class _ListPageState extends State<ListPage> {
                     ListTile.divideTiles(context: context, tiles: _listTasks())
                         .toList(),
               ),
-              onRefresh: _updateList,
+              onRefresh: _loadList,
             )
           : Center(child: CircularProgressIndicator()),
-      floatingActionButton: FloatingActionButton(
+      floatingActionButton: Builder(
-          onPressed: () => _addItemDialog(), child: Icon(Icons.add)),
+        builder: (context) => FloatingActionButton(
-    );
+          onPressed: () => _addItemDialog(context), child: Icon(Icons.add)),
+    ));
   }
 
   List<Widget> _listTasks() {
@@ -84,7 +85,7 @@ class _ListPageState extends State<ListPage> {
     );
   }
 
-  Future<void> _updateList() {
+  Future<void> _loadList() {
     return VikunjaGlobal.of(context)
         .listService
         .get(widget.taskList.id)
@@ -96,16 +97,16 @@ class _ListPageState extends State<ListPage> {
     });
   }
 
-  _addItemDialog() {
+  _addItemDialog(BuildContext context) {
     showDialog(
         context: context,
         builder: (_) => AddDialog(
-            onAdd: _addItem,
+            onAdd: (name) => _addItem(name, context),
             decoration: new InputDecoration(
                 labelText: 'Task Name', hintText: 'eg. Milk')));
   }
 
-  _addItem(String name) {
+  _addItem(String name, BuildContext context) {
     var globalState = VikunjaGlobal.of(context);
     var newTask =
         Task(id: null, text: name, owner: globalState.currentUser, done: false);
@@ -115,8 +116,11 @@ class _ListPageState extends State<ListPage> {
         _list.tasks.add(task);
       });
     }).then((_) {
-      _updateList();
+      _loadList();
       setState(() => _loadingTasks.remove(newTask));
+      Scaffold.of(context).showSnackBar(SnackBar(
+        content: Text('The task was added successfully!'),
+      ));
     });
   }
 }