Add ListPage

lib/fragments/namespace.dart

@@ -1,24 +1,50 @@
+import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
+import 'package:fluttering_vikunja/pages/list_page.dart';
 
-class NamespaceFragment extends StatelessWidget {
+class NamespaceFragment extends StatefulWidget {
   final String namespace;
+  NamespaceFragment({this.namespace}) : super(key: Key(namespace));
 
-  NamespaceFragment({this.namespace});
+  @override
+  _NamespaceFragmentState createState() => new _NamespaceFragmentState();
+}
+
+class _NamespaceFragmentState extends State<NamespaceFragment> {
+  Set<String> _lists = Set.from(
+      ["Cupertino List", "Material List", "Shopping List", "NAS List"]);
 
   @override
   Widget build(BuildContext context) {
-    return new Center(
-        child: new Column(
-      mainAxisAlignment: MainAxisAlignment.center,
-      children: <Widget>[
-        new Container(
-          child: new Text(
-            'Namespace: $namespace',
-            style: Theme.of(context).textTheme.title,
-          ),
-        ),
-        new Text('You\'ve selected a namespace!')
-      ],
-    ));
+    return new ListView(
+      padding: EdgeInsets.symmetric(vertical: 8.0),
+      children: ListTile.divideTiles(
+          context: context,
+          tiles: _lists.map((name) => Dismissible(
+                key: Key(name),
+                direction: DismissDirection.startToEnd,
+                child: ListTile(
+                  title: new Text(name),
+                  onTap: () => _openList(context, name),
+                  trailing: Icon(Icons.arrow_right),
+                ),
+                background: Container(
+                  color: Colors.red,
+                  child: const ListTile(
+                      leading:
+                          Icon(Icons.delete, color: Colors.white, size: 36.0)),
+                ),
+                onDismissed: (direction) {
+                  setState(() => _lists.remove(name));
+                  Scaffold.of(context)
+                      .showSnackBar(SnackBar(content: Text("$name removed")));
+                },
+              ))).toList(),
+    );
+  }
+
+  _openList(BuildContext context, String name) {
+    Navigator.of(context).push(
+        MaterialPageRoute(builder: (context) => ListPage(listName: name)));
   }
 }

lib/pages/list_page.dart

@@ -0,0 +1,26 @@
+import 'package:flutter/material.dart';
+
+class ListPage extends StatefulWidget {
+  final String listName;
+
+  ListPage({this.listName}) : super(key: Key(listName));
+
+  @override
+  _ListPageState createState() => _ListPageState();
+}
+
+class _ListPageState extends State<ListPage> {
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: new Text(widget.listName),
+      ),
+      body: Center(
+        child: RaisedButton(
+            onPressed: () => Navigator.of(context).pop(),
+            child: const Text("Go back")),
+      ),
+    );
+  }
+}