Adding drawer.

lib/ui/drawer.dart

@@ -0,0 +1,35 @@
+import 'package:flutter/material.dart';
+
+Drawer theDrawer(context) {
+  return Drawer(
+      child: ListView(padding: EdgeInsets.zero, children: <Widget>[
+    DrawerHeader(
+        child: Column(
+            mainAxisAlignment: MainAxisAlignment.start,
+            children: <Widget>[
+              Icon(Icons.view_list),
+              Text("Main menu"),
+            ]),
+        decoration: BoxDecoration(
+          color: Theme.of(context).primaryColor,
+        )),
+    ListTile(
+      title: Row(children: <Widget>[Icon(Icons.home), Text("Home")]),
+      onTap: () {
+        Navigator.of(context).pushNamed("/");
+      },
+    ),
+    ListTile(
+      title: Row(children: <Widget>[Icon(Icons.build), Text("Operations")]),
+      onTap: () {
+        Navigator.of(context).pushNamed("/operations");
+      },
+    ),
+    ListTile(
+      title: Row(children: <Widget>[Icon(Icons.settings), Text("Settings")]),
+      onTap: () {
+        Navigator.of(context).pushNamed("/settings");
+      },
+    )
+  ]));
+}

lib/ui/main_page.dart

@@ -3,6 +3,8 @@ import 'package:logger/logger.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 import 'dart:async';
 
+import 'drawer.dart';
+
 var log = Logger();
 
 class _DataState {
@@ -142,6 +144,7 @@ class HomePageState extends State<HomePage> {
     return Scaffold(
       appBar: AppBar(title: Text(title)),
       body: _body(),
+      drawer: theDrawer(context),
     );
   }
 }