diff --git a/example/main.dart b/example/main.dart
index a1b2137a..c9c826af 100644
--- a/example/main.dart
+++ b/example/main.dart
@@ -1,11 +1,7 @@
 import 'dart:async';
-import 'dart:convert';
 import 'dart:io';
 
-import 'package:app/pages/read_only_page.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
-import 'package:flutter_quill/models/documents/document.dart';
 import 'package:flutter_quill/widgets/controller.dart';
 import 'package:flutter_quill/widgets/editor.dart';
 import 'package:flutter_quill/widgets/toolbar.dart';
@@ -16,112 +12,26 @@ class HomePage extends StatefulWidget {
 }
 
 class _HomePageState extends State<HomePage> {
-  QuillController _controller;
-  final FocusNode _focusNode = FocusNode();
-
-  @override
-  void initState() {
-    super.initState();
-    _loadFromAssets();
-  }
-
-  Future<void> _loadFromAssets() async {
-    try {
-      final result = await rootBundle.loadString('assets/sample_data.json');
-      final doc = Document.fromJson(jsonDecode(result));
-      setState(() {
-        _controller = QuillController(
-            document: doc, selection: TextSelection.collapsed(offset: 0));
-      });
-    } catch (error) {
-      final doc = Document()..insert(0, 'Empty asset');
-      setState(() {
-        _controller = QuillController(
-            document: doc, selection: TextSelection.collapsed(offset: 0));
-      });
-    }
-  }
+  QuillController _controller = QuillController.basic();
 
   @override
   Widget build(BuildContext context) {
-    if (_controller == null) {
-      return Scaffold(body: Center(child: Text('Loading...')));
-    }
-
     return Scaffold(
-      appBar: AppBar(
-        backgroundColor: Colors.grey.shade800,
-        elevation: 0,
-        centerTitle: false,
-        title: Text(
-          'Flutter Quill',
-        ),
-        actions: [],
-      ),
-      drawer: Material(
-        color: Colors.grey.shade800,
-        child: _buildMenuBar(context),
-      ),
-      body: _buildWelcomeEditor(context),
-    );
+        body: Column(
+          children: [
+            QuillToolbar.basic(
+                controller: _controller, uploadFileCallback: _uploadImageCallBack),
+            Expanded(
+              child: Container(
+                child: QuillEditor.basic(_controller),
+              ),
+            )
+          ],
+        ));
   }
 
-  Widget _buildWelcomeEditor(BuildContext context) {
-    return Column(
-      children: [
-        QuillToolbar.basic(
-            controller: _controller,
-            uploadFileCallback: _fakeUploadImageCallBack),
-        Divider(height: 1, thickness: 1, color: Colors.grey.shade200),
-        Expanded(
-          child: Container(
-            color: Colors.white,
-            padding: const EdgeInsets.only(left: 16.0, right: 16.0),
-            child: QuillEditor(
-              controller: _controller,
-              scrollController: ScrollController(),
-              scrollable: true,
-              focusNode: _focusNode,
-              autoFocus: true,
-              readOnly: false,
-              enableInteractiveSelection: true,
-              expands: false,
-              padding: EdgeInsets.zero,
-            ),
-          ),
-        ),
-      ],
-    );
+  Future<String> _uploadImageCallBack(File file) async {
+    // call upload file API and return file's absolute url
+    return new Completer<String>().future;
   }
-
-  Future<String> _fakeUploadImageCallBack(File file) async {
-    print(file);
-    var completer = new Completer<String>();
-    completer.complete(
-        'https://user-images.githubusercontent.com/122956/72955931-ccc07900-3d52-11ea-89b1-d468a6e2aa2b.png');
-    return completer.future;
-  }
-
-  Widget _buildMenuBar(BuildContext context) {
-    final itemStyle = TextStyle(color: Colors.white);
-    return ListView(
-      children: [
-        ListTile(
-          title: Text('Read only demo', style: itemStyle),
-          dense: true,
-          visualDensity: VisualDensity.compact,
-          onTap: _readOnly,
-        )
-      ],
-    );
-  }
-
-  void _readOnly() {
-    Navigator.push(
-      context,
-      MaterialPageRoute(
-        builder: (BuildContext context) => ReadOnlyPage(),
-      ),
-    );
-  }
-}
+}
\ No newline at end of file
diff --git a/lib/widgets/controller.dart b/lib/widgets/controller.dart
index 07f081aa..486f93cf 100644
--- a/lib/widgets/controller.dart
+++ b/lib/widgets/controller.dart
@@ -17,11 +17,16 @@ class QuillController extends ChangeNotifier {
       : assert(document != null),
         assert(selection != null);
 
+  factory QuillController.basic() {
+    return QuillController(
+        document: Document(), selection: TextSelection.collapsed(offset: 0));
+  }
+
   TextEditingValue get plainTextEditingValue => TextEditingValue(
-    text: document.toPlainText(),
-    selection: selection,
-    composing: TextRange.empty,
-  );
+        text: document.toPlainText(),
+        selection: selection,
+        composing: TextRange.empty,
+      );
 
   Style getSelectionStyle() {
     return document
@@ -37,7 +42,7 @@ class QuillController extends ChangeNotifier {
       try {
         delta = document.replace(index, len, data);
       } catch (e) {
-        print ('document.replace failed: $e');
+        print('document.replace failed: $e');
         throw e;
       }
       if (delta != null &&
@@ -71,7 +76,7 @@ class QuillController extends ChangeNotifier {
             ChangeSource.LOCAL,
           );
         } catch (e) {
-          print ('getPositionDelta or getPositionDelta error: $e');
+          print('getPositionDelta or getPositionDelta error: $e');
           throw e;
         }
       }
diff --git a/lib/widgets/editor.dart b/lib/widgets/editor.dart
index 30c9df6e..55d7895f 100644
--- a/lib/widgets/editor.dart
+++ b/lib/widgets/editor.dart
@@ -113,7 +113,7 @@ class QuillEditor extends StatefulWidget {
 
   QuillEditor(
       {@required this.controller,
-      this.focusNode,
+      @required this.focusNode,
       @required this.scrollController,
       @required this.scrollable,
       @required this.padding,
@@ -132,10 +132,25 @@ class QuillEditor extends StatefulWidget {
       : assert(controller != null),
         assert(scrollController != null),
         assert(scrollable != null),
+        assert(focusNode != null),
         assert(autoFocus != null),
         assert(readOnly != null),
         assert(embedBuilder != null);
 
+  factory QuillEditor.basic(QuillController controller) {
+    return QuillEditor(
+        controller: controller,
+        scrollController: ScrollController(),
+        scrollable: true,
+        focusNode: FocusNode(),
+        autoFocus: true,
+        readOnly: false,
+        // change to true to be view only mode
+        enableInteractiveSelection: true,
+        expands: false,
+        padding: EdgeInsets.zero);
+  }
+
   @override
   _QuillEditorState createState() => _QuillEditorState();
 }