routes + some structure improvements

lib/main.dart

@@ -1,5 +1,16 @@
 import 'package:flutter/material.dart';
 
 import 'src/openlp_remote_app.dart';
+import 'src/app_theme.dart';
+import 'src/widgets/settings.dart';
 
-void main() => runApp(OpenLPRemoteApp());
+void main() => runApp(
+      MaterialApp(
+        debugShowCheckedModeBanner: false,
+        theme: appTheme,
+        routes: <String, WidgetBuilder>{
+          '/': (context) => OpenLPRemoteApp(),
+          '/settings': (context) => Settings(),
+        },
+      ),
+    );

lib/src/openlp_remote_app.dart

@@ -1,7 +1,5 @@
 import 'package:flutter/material.dart';
 
-import 'app_theme.dart';
-
 import 'widgets/bottom_navigation_bar.dart';
 import 'widgets/search_floating_button.dart';
 import 'widgets/service_listview.dart';
@@ -24,38 +22,36 @@ class _OpenLPRemoteAppState extends State<OpenLPRemoteApp>
 
   @override
   Widget build(BuildContext context) {
-    return MaterialApp(
-      debugShowCheckedModeBanner: false,
-      theme: appTheme,
-      home: Scaffold(
-        appBar: AppBar(
-          title: Text('OpenLP Remote'),
-          actions: <Widget>[
-            IconButton(
-              icon: Icon(Icons.settings),
-              onPressed: () {},
-              tooltip: 'Settings',
-            ),
-          ],
-          bottom: TabBar(
-            tabs: <Widget>[
-              Tab(text: 'SERVICE'),
-              Tab(text: 'SLIDES'),
-            ],
-            controller: tabController,
+    return Scaffold(
+      appBar: AppBar(
+        title: Text('OpenLP Remote'),
+        actions: <Widget>[
+          IconButton(
+            icon: Icon(Icons.settings),
+            onPressed: () {
+              Navigator.of(context).pushNamed('/settings');
+            },
+            tooltip: 'Settings',
           ),
-        ),
-        body: TabBarView(
-          controller: tabController,
-          children: <Widget>[
-            ServiceListView(),
-            SlideListView(),
+        ],
+        bottom: TabBar(
+          tabs: <Widget>[
+            Tab(text: 'SERVICE'),
+            Tab(text: 'SLIDES'),
           ],
+          controller: tabController,
         ),
-        floatingActionButton: SearchFloatingButton(),
-        floatingActionButtonLocation: FloatingActionButtonLocation.centerDocked,
-        bottomNavigationBar: AppBottomNavigationBar(),
       ),
+      body: TabBarView(
+        controller: tabController,
+        children: <Widget>[
+          ServiceListView(),
+          SlideListView(),
+        ],
+      ),
+      floatingActionButton: SearchFloatingButton(),
+      floatingActionButtonLocation: FloatingActionButtonLocation.centerDocked,
+      bottomNavigationBar: AppBottomNavigationBar(),
     );
   }
 }

lib/src/widgets/settings.dart

@@ -0,0 +1,20 @@
+import 'package:flutter/material.dart';
+
+class Settings extends StatefulWidget {
+  @override
+  State<StatefulWidget> createState() => _SettingState();
+  
+}
+
+class _SettingState extends State<Settings> {
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text('Settings'),
+      ),
+      body: Container(),
+    );
+  }
+  
+}