todo save, popup, dismiss show dialog

lib/main.dart

@@ -1,28 +1,26 @@
 import 'package:flutter/material.dart';
+import 'package:todo/utils/dialog_box.dart';
+import 'package:todo/utils/todo_tile.dart';
 
 void main() {
   runApp(const MyApp());
 }
 
-class MyApp extends StatelessWidget {
+class MyApp extends StatefulWidget {
   const MyApp({Key? key}) : super(key: key);
 
+  @override
+  State<MyApp> createState() => _MyAppState();
+}
+
+class _MyAppState extends State<MyApp> {
   // This widget is the root of your application.
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
-      title: 'Flutter Demo',
+      title: 'Todo',
       theme: ThemeData(
-        // This is the theme of your application.
-        //
-        // Try running your application with "flutter run". You'll see the
-        // application has a blue toolbar. Then, without quitting the app, try
-        // changing the primarySwatch below to Colors.green and then invoke
-        // "hot reload" (press "r" in the console where you ran "flutter run",
-        // or simply save your changes to "hot reload" in a Flutter IDE).
-        // Notice that the counter didn't reset back to zero; the application
-        // is not restarted.
-        primarySwatch: Colors.blue,
+        primarySwatch: Colors.red,
       ),
       home: const MyHomePage(title: 'Flutter Demo Home Page'),
     );
@@ -32,15 +30,6 @@ class MyApp extends StatelessWidget {
 class MyHomePage extends StatefulWidget {
   const MyHomePage({Key? key, required this.title}) : super(key: key);
 
-  // This widget is the home page of your application. It is stateful, meaning
-  // that it has a State object (defined below) that contains fields that affect
-  // how it looks.
-
-  // This class is the configuration for the state. It holds the values (in this
-  // case the title) provided by the parent (in this case the App widget) and
-  // used by the build method of the State. Fields in a Widget subclass are
-  // always marked "final".
-
   final String title;
 
   @override
@@ -48,65 +37,57 @@ class MyHomePage extends StatefulWidget {
 }
 
 class _MyHomePageState extends State<MyHomePage> {
-  int _counter = 0;
+  final _controller = TextEditingController();
+  List todoList = [
+    ["Make Tutorial", true],
+    ["Buy car", false],
+    ["Buy new wife", true],
+    ["buy card", false],
+  ];
 
-  void _incrementCounter() {
+  void checkBoxChanged(bool? value, int index) {
     setState(() {
-      // This call to setState tells the Flutter framework that something has
-      // changed in this State, which causes it to rerun the build method below
-      // so that the display can reflect the updated values. If we changed
-      // _counter without calling setState(), then the build method would not be
-      // called again, and so nothing would appear to happen.
-      _counter++;
+      todoList[index][1] = !todoList[index][1];
     });
   }
 
+  void saveNewTask() {
+    setState(() {
+      todoList.add([_controller.text, false]);
+      _controller.clear();
+    });
+    Navigator.of(context).pop();
+  }
+
+  void createNewTask() {
+    showDialog(
+        context: context,
+        builder: (context) {
+          return DialogBox(
+            controller: _controller,
+            onCancel: () => Navigator.of(context).pop(),
+            onSave: saveNewTask,
+          );
+        });
+  }
+
   @override
   Widget build(BuildContext context) {
-    // This method is rerun every time setState is called, for instance as done
-    // by the _incrementCounter method above.
-    //
-    // The Flutter framework has been optimized to make rerunning build methods
-    // fast, so that you can just rebuild anything that needs updating rather
-    // than having to individually change instances of widgets.
     return Scaffold(
       appBar: AppBar(
-        // Here we take the value from the MyHomePage object that was created by
-        // the App.build method, and use it to set our appbar title.
         title: Text(widget.title),
       ),
-      body: Center(
-        // Center is a layout widget. It takes a single child and positions it
-        // in the middle of the parent.
-        child: Column(
-          // Column is also a layout widget. It takes a list of children and
-          // arranges them vertically. By default, it sizes itself to fit its
-          // children horizontally, and tries to be as tall as its parent.
-          //
-          // Invoke "debug painting" (press "p" in the console, choose the
-          // "Toggle Debug Paint" action from the Flutter Inspector in Android
-          // Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
-          // to see the wireframe for each widget.
-          //
-          // Column has various properties to control how it sizes itself and
-          // how it positions its children. Here we use mainAxisAlignment to
-          // center the children vertically; the main axis here is the vertical
-          // axis because Columns are vertical (the cross axis would be
-          // horizontal).
-          mainAxisAlignment: MainAxisAlignment.center,
-          children: <Widget>[
-            const Text(
-              'You have pushed the button this many times:',
-            ),
-            Text(
-              '$_counter',
-              style: Theme.of(context).textTheme.headline4,
-            ),
-          ],
-        ),
-      ),
+      body: ListView.builder(
+          itemCount: todoList.length,
+          itemBuilder: (context, index) {
+            return ToDoTile(
+              taskName: todoList[index][0],
+              taskCompleted: todoList[index][1],
+              onChanged: (value) => checkBoxChanged(value, index),
+            );
+          }),
       floatingActionButton: FloatingActionButton(
-        onPressed: _incrementCounter,
+        onPressed: createNewTask,
         tooltip: 'Increment',
         child: const Icon(Icons.add),
       ), // This trailing comma makes auto-formatting nicer for build methods.

lib/utils/dialog_box.dart

@@ -0,0 +1,45 @@
+import 'package:flutter/material.dart';
+import 'package:todo/utils/my_button.dart';
+
+class DialogBox extends StatelessWidget {
+  DialogBox(
+      {Key? key,
+      required this.controller,
+      required this.onSave,
+      required this.onCancel})
+      : super(key: key);
+
+  final controller;
+  VoidCallback onSave;
+  VoidCallback onCancel;
+
+  @override
+  Widget build(BuildContext context) {
+    return AlertDialog(
+      backgroundColor: Theme.of(context).primaryColor,
+      title: Text("New Task"),
+      content: Container(
+        height: 120,
+        child: Column(
+          children: [
+            TextField(
+              controller: controller,
+              decoration: InputDecoration(
+                  border: OutlineInputBorder(), hintText: "Add new task"),
+            ),
+            SizedBox(
+              height: 40,
+            ),
+            Row(
+              mainAxisAlignment: MainAxisAlignment.end,
+              children: [
+                MyButton(text: "Cancel", onPressed: onCancel),
+                MyButton(text: "Save", onPressed: onSave),
+              ],
+            )
+          ],
+        ),
+      ),
+    );
+  }
+}

lib/utils/my_button.dart

@@ -0,0 +1,18 @@
+import 'package:flutter/material.dart';
+
+class MyButton extends StatelessWidget {
+  MyButton({Key? key, required this.text, required this.onPressed})
+      : super(key: key);
+
+  final String text;
+  VoidCallback onPressed;
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialButton(
+      onPressed: onPressed,
+      color: Theme.of(context).primaryColor,
+      child: Text(text),
+    );
+  }
+}

lib/utils/todo_tile.dart

@@ -0,0 +1,45 @@
+import 'package:flutter/material.dart';
+
+class ToDoTile extends StatelessWidget {
+  const ToDoTile(
+      {Key? key,
+      required this.taskName,
+      required this.taskCompleted,
+      required this.onChanged})
+      : super(key: key);
+
+  final String taskName;
+  final bool taskCompleted;
+  final Function(bool?)? onChanged;
+
+  @override
+  Widget build(BuildContext context) {
+    return Padding(
+      padding: const EdgeInsets.fromLTRB(25.0, 25, 25, 0),
+      child: Container(
+        padding: EdgeInsets.all(24.0),
+        child: Row(
+          mainAxisAlignment: MainAxisAlignment.spaceBetween,
+          children: [
+            Text(
+              taskName,
+              style: TextStyle(
+                  decoration: taskCompleted
+                      ? TextDecoration.lineThrough
+                      : TextDecoration.none),
+            ),
+            Checkbox(
+              value: taskCompleted,
+              onChanged: onChanged,
+              activeColor: Colors.redAccent,
+            )
+          ],
+        ),
+        decoration: BoxDecoration(
+          color: Theme.of(context).primaryColor,
+          borderRadius: BorderRadius.circular(10.0),
+        ),
+      ),
+    );
+  }
+}