Pankaj Das

Pankaj Das


What is TabPageSelector Class in Flutter?

The new-age application is gaining massive traffic because of its engaging interface and creative build quality. Intuitive and multifunctional widgets play an integral role in upgrading the experience and performance of the apps.

The web development company usually hire Flutter developers to implement these widgets to create a multifunctional app. Flutter apps provide distinct categories and features that allow users to explore more functions built within the app.

Flutter expertise builds the app with the quality which engages the user with an informative glance inviting them to separate options within specific categories which function with a simple click or swipe. Flutter TabBar is such a function that implements the different functions in the app through distinct categories.

Tabpageselector is a crucial part of the TabBar, which functions distinctly and plays a major role in increasing the user experience while exploring the app. This article will discuss the TabPageSelector with its build method, attributes, and other related aspects. Let us start:

TabPageSelector Class:

Tabpageselector class is a part of TabBar, frequently used in conjunction with the highlighted view. For instance, when the TabController is unavailable in the app, the DefaultTabController must be present as an ancestral element in the flutter app. let us discuss more aspects of Tabpageselector class:


The Tab page selector is inherited with the following sequence in the flutter app.
Object > diagonsticable Tree > Widget > Stateless Widget > Tabpage selector.


The constructor of the Tab page selector mentions the detailed information to be entered in the application.

{Key? key,
TabController? controller,
double indicatorSize = 12.0,
Color? color,
Color? selectedColor,
BorderStyle? borderStyle}

It creates a compact widget that indicates the selected tab.


Specific properties must be entered in the Tabpageselector for the proper functioning of the Widget.

Below are the mentions:

color – Color

These options fill color for unselected pages by indicator circles.

controller – MotionTabController

This Widget is about the selection and animation state in the flutter app.

hashCode – int

The hash code is used for this object.
@nonVirtual, read-only, inherited

indicators – double

It is about the diameter of indicator circles (Its default value is 12.0).

key – Key

It controls the widget replacement by another widget within the tree.
Final, inherited

runtimeType → Type

It represents the runtime type of the object in the flutter app.
read-only, inherited

selectedColor → Color

It fills color for selected pages and border color for all indicator circles.


A certain method is used in the Tabpageselector widget for the smooth functioning of the flutter app. A Flutter development company has the Flutter experts which can create such multifunctional Widget in the Flutter app development. let’s have a look at the methods:

build(BuildContext context) – Widget

It defines the representation of the user interface through this Widget.

createElement() – StatelessElement

It creates the StatelessElement for widget’s location management in the tree.

debugDescribeChildren() – List

It returns the detailed list of DiagnosticsNode objects defining the node’s children.
@protected, inherited

debugFillProperties(DiagnosticPropertiesBuilder properties) – void

It adds additional properties related to the node.

noSuchMethod(Invocation invocation) – dynamic

It is invoked at the time of property assessment or with a non-existent method.

toDiagnosticsNode({String name, DiagnosticsTreeStyle style}) – DiagnosticsNode

It returns a debug presentation of an object which is used by DiagnosticsNode.toStringDeep and by debugging tools.

toString({DiagnosticLevel minLevel =}) – String

It is a string representation of the specific object.

toStringDeep({String prefixLineOne = ”, String prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug}) – String

It returns a string representation of this particular node and its descendants.

toStringShallow({String joiner = ‘, ‘, DiagnosticLevel minLevel = DiagnosticLevel.debug}) – String

It returns a single-line description of the object with complete details.

toStringShort() → String

It is a textual and small description of this Widget.


The operation of the Tabpageselector depends upon the single line code, which is used multiple times in the Widget for any particular function. Below is the mention:

operator ==(Object other) → bool

It undergoes the comparison of two widgets to attain equality. […]
@nonVirtual inherited

Building Method Of The TabPageSelector In The Flutter App:

The build context of this Widget in the TabBar is:
Widget build (BuildContext context){};

It describes the user interface created by the Widget included in the Flutter app. In the building method of this Widget, the code is inserted in the framework with BuildContext in the tree with the variation dependencies for changing the functions.

It replaces the Widget subtree, which either removes or updates the subtree and inflates the novel subtree. This variation particularly depends on the capability of a widget that updates from its roots by this method and is finally determined by Widget. Can update.

The collective configuration of Widgets is implemented with all the information by the widget constructor by BuildContext. BuildContext has all the collective information about the widget construction and its accurate location in the tree. A widget may be built with multiple information and configuration and at different tree locations.

BuildContext has all the information about the data and positioning of each Widget in the tree.The proper implementation entirely depends upon the two basic aspects:

Widget fields that do not undergo any variation by themselves with time.
Any state derived from Context by using the BuildContext.inheritFromWidgetOfExactType.
For other dependencies StatefulWidget is used to build the functional and multi featured widget.

Below is the code which defines the implementation for building the Tabpageselector.

import 'dart:async';
import 'package:flutter/material.dart';
class MyHomePage extends StatefulWidget {
 const MyHomePage({Key? key}) : super(key: key);
 State<myhomepage> createState() => _MyHomePageState();
class _MyHomePageState extends State<myhomepage>
   with SingleTickerProviderStateMixin {
 late final TabController _controller;
 late final Timer _timer;
 static const _colors = [,
 int _index = 0;
 void _circulate() {
   (_index != _colors.length - 1) ? _index++ : _index = 0;
   setState(() {});
 void initState() {
   _controller = TabController(
     length: 3,
     initialIndex: _index,
     vsync: this,
   _timer = Timer.periodic(
     const Duration(seconds: 1),
     (_) => _circulate(),
 void dispose() {
 Widget build(BuildContext context) {
   return Scaffold(
     appBar: AppBar(
       title: const Text("TabBarSelector"),
     body: Stack(
       children: <widget>[
         Container(color: _colors[_controller.index]),
           bottom: 20,
           child: TabPageSelector(
             controller: _controller,
             color: Colors.black38,
             selectedColor: Colors.white30,




With the constant technological growth, Flutter app development company have the experienced Flutter engineers to build multi-featured and functional apps with creative and high-tech widgets. It is a detailed guide about the prominent attributes, methods, operation, and building of tabPageSelector in the Flutter apps. It improves the user experience and attracts them to swipe and click more to explore the app. The above article briefly explains the functions and relative aspects of Tabpageselector functioning in TabBar.

Frequently Asked Questions (FAQs)

1. What are Widgets in Flutter development services?

Widgets are the central class hierarchy in the Flutter application. It has a description of the user interface, which is not modified and can be extended into elements, which will manage the underlying render tree. They didn’t have any mutable state.

2. What is TabBar in Flutter?

Usually, TabBar is used to design the tabs, Whereas TabBarView can be used to define the content of each page. However, Flutter knows how to switch between two tabs, which is easier for us. In Flutter, it is possible to customize the behaviour and style of the tab layout.

3. What will Stateless Widget work in Flutter?

It is a widget which does not change its state during the runtime of a Flutter application. It means that it is not redrawn when the app is in action. In that case, the appearance and the properties remain unchanged during the lifetime of the widget.

4. What is DefaultTabController in the Flutter application?

The DefaultTabController is an inherited widget utilized to exchange a TabController with a TabBar or TabBarView. It is preferred when you share a specifically designed TabController, which is not easy as the tab bar widgets are constructed by stateless parent widgets or the other parent widgets.

5. Did you Know how TabPageSelector works?

A TabPageSelector is an easy widget that will view the recently selected index via TabPageSelectorIndicator widgets. It will animate the indicators whenever the index begins to modify.


What is GEEK

Buddha Community

What is TabPageSelector Class in Flutter?

Google's Flutter 1.20 stable announced with new features - Navoki

Flutter Google cross-platform UI framework has released a new version 1.20 stable.

Flutter is Google’s UI framework to make apps for Android, iOS, Web, Windows, Mac, Linux, and Fuchsia OS. Since the last 2 years, the flutter Framework has already achieved popularity among mobile developers to develop Android and iOS apps. In the last few releases, Flutter also added the support of making web applications and desktop applications.

Last month they introduced the support of the Linux desktop app that can be distributed through Canonical Snap Store(Snapcraft), this enables the developers to publish there Linux desktop app for their users and publish on Snap Store.  If you want to learn how to Publish Flutter Desktop app in Snap Store that here is the tutorial.

Flutter 1.20 Framework is built on Google’s made Dart programming language that is a cross-platform language providing native performance, new UI widgets, and other more features for the developer usage.

Here are the few key points of this release:

Performance improvements for Flutter and Dart

In this release, they have got multiple performance improvements in the Dart language itself. A new improvement is to reduce the app size in the release versions of the app. Another performance improvement is to reduce junk in the display of app animation by using the warm-up phase.


If your app is junk information during the first run then the Skia Shading Language shader provides for pre-compilation as part of your app’s build. This can speed it up by more than 2x.

Added a better support of mouse cursors for web and desktop flutter app,. Now many widgets will show cursor on top of them or you can specify the type of supported cursor you want.

Autofill for mobile text fields

Autofill was already supported in native applications now its been added to the Flutter SDK. Now prefilled information stored by your OS can be used for autofill in the application. This feature will be available soon on the flutter web.


A new widget for interaction

InteractiveViewer is a new widget design for common interactions in your app like pan, zoom drag and drop for resizing the widget. Informations on this you can check more on this API documentation where you can try this widget on the DartPad. In this release, drag-drop has more features added like you can know precisely where the drop happened and get the position.

Updated Material Slider, RangeSlider, TimePicker, and DatePicker

In this new release, there are many pre-existing widgets that were updated to match the latest material guidelines, these updates include better interaction with Slider and RangeSliderDatePicker with support for date range and time picker with the new style.


New pubspec.yaml format

Other than these widget updates there is some update within the project also like in pubspec.yaml file format. If you are a flutter plugin publisher then your old pubspec.yaml  is no longer supported to publish a plugin as the older format does not specify for which platform plugin you are making. All existing plugin will continue to work with flutter apps but you should make a plugin update as soon as possible.

Preview of embedded Dart DevTools in Visual Studio Code

Visual Studio code flutter extension got an update in this release. You get a preview of new features where you can analyze that Dev tools in your coding workspace. Enable this feature in your vs code by _dart.previewEmbeddedDevTools_setting. Dart DevTools menu you can choose your favorite page embed on your code workspace.

Network tracking

The updated the Dev tools comes with the network page that enables network profiling. You can track the timings and other information like status and content type of your** network calls** within your app. You can also monitor gRPC traffic.

Generate type-safe platform channels for platform interop

Pigeon is a command-line tool that will generate types of safe platform channels without adding additional dependencies. With this instead of manually matching method strings on platform channel and serializing arguments, you can invoke native class and pass nonprimitive data objects by directly calling the Dartmethod.

There is still a long list of updates in the new version of Flutter 1.2 that we cannot cover in this blog. You can get more details you can visit the official site to know more. Also, you can subscribe to the Navoki newsletter to get updates on these features and upcoming new updates and lessons. In upcoming new versions, we might see more new features and improvements.

You can get more free Flutter tutorials you can follow these courses:

#dart #developers #flutter #app developed #dart devtools in visual studio code #firebase local emulator suite in flutter #flutter autofill #flutter date picker #flutter desktop linux app build and publish on snapcraft store #flutter pigeon #flutter range slider #flutter slider #flutter time picker #flutter tutorial #flutter widget #google flutter #linux #navoki #pubspec format #setup flutter desktop on windows

Terry  Tremblay

Terry Tremblay


What is Flutter and why you should learn it?

Flutter is an open-source UI toolkit for mobile developers, so they can use it to build native-looking** Android and iOS** applications from the same code base for both platforms. Flutter is also working to make Flutter apps for Web, PWA (progressive Web-App) and Desktop platform (Windows,macOS,Linux).


Flutter was officially released in December 2018. Since then, it has gone a much stronger flutter community.

There has been much increase in flutter developers, flutter packages, youtube tutorials, blogs, flutter examples apps, official and private events, and more. Flutter is now on top software repos based and trending on GitHub.

Flutter meaning?

What is Flutter? this question comes to many new developer’s mind.


Flutter means flying wings quickly, and lightly but obviously, this doesn’t apply in our SDK.

So Flutter was one of the companies that were acquired by **Google **for around $40 million. That company was based on providing gesture detection and recognition from a standard webcam. But later when the Flutter was going to release in alpha version for developer it’s name was Sky, but since Google already owned Flutter name, so they rename it to Flutter.

Where Flutter is used?

Flutter is used in many startup companies nowadays, and even some MNCs are also adopting Flutter as a mobile development framework. Many top famous companies are using their apps in Flutter. Some of them here are





Reflectly app

Reflectly app

Abbey Road Studios

Abbey Road Studios

and many more other apps. Mobile development companies also adopted Flutter as a service for their clients. Even I was one of them who developed flutter apps as a freelancer and later as an IT company for mobile apps.

Flutter as a service

#dart #flutter #uncategorized #flutter framework #flutter jobs #flutter language #flutter meaning #flutter meaning in hindi #google flutter #how does flutter work #what is flutter

Lawrence  Lesch

Lawrence Lesch


Superdom: Better and Simpler ES6 DOM Manipulation


You have dom. It has all the DOM virtually within it. Use that power:

// Fetch all the page links
let links = dom.a.href;

// Links open in a new tab = '_blank';

Only for modern browsers

Getting started

Simply use the CDN via

<script src=""></script>

Or use npm or bower:

npm|bower install superdom --save


It always returns an array with the matched elements. Get all the elements that match the selector:

// Simple element selector into an array
let allLinks = dom.a;

// Loop straight on the selection
dom.a.forEach(link => { ... });

// Combined selector
let importantLinks = dom['a.important'];

There are also some predetermined elements, such as id, class and attr:

// Select HTML Elements by id:
let main =;

// by class:
let buttons = dom.class.button;

// or by attribute:
let targeted =;
let targeted = dom.attr['target="_blank"'];


Use it as a function or a tagged template literal to generate DOM fragments:

// Not a typo; tagged template literals
let link = dom`<a href="">Google</a>`;

// It is the same as
let link = dom('<a href="">Google</a>');

Delete elements

Delete a piece of the DOM

// Delete all of the elements with the class .google
delete;   // Is this an ad-block rule?


You can easily manipulate attributes right from the dom node. There are some aliases that share the syntax of the attributes such as html and text (aliases for innerHTML and textContent). There are others that travel through the dom such as parent (alias for parentNode) and children. Finally, class behaves differently as explained below.

Get attributes

The fetching will always return an array with the element for each of the matched nodes (or undefined if not there):

// Retrieve all the urls from the page
let urls = dom.a.href;     // #attr-list
  // ['', '', ...]

// Get an array of the h2 contents (alias of innerHTML)
let h2s = dom.h2.html;     // #attr-alias
  // ['Level 2 header', 'Another level 2 header', ...]

// Get whether any of the attributes has the value "_blank"
let hasBlank =;    // #attr-value
  // true/false

You also use these:

  • html (alias of innerHTML): retrieve a list of the htmls
  • text (alias of textContent): retrieve a list of the htmls
  • parent (alias of parentNode): travel up one level
  • children: travel down one level

Set attributes

// Set target="_blank" to all links = '_blank';     // #attr-set
dom.class.tableofcontents.html = `
  <ul class="tableofcontents">
    ${ => `
        <a href="#${}">

Remove an attribute

To delete an attribute use the delete keyword:

// Remove all urls from the page
delete dom.a.href;

// Remove all ids


It provides an easy way to manipulate the classes.

Get classes

To retrieve whether a particular class is present or not:

// Get an array with true/false for a single class
let isTest = dom.a.class.test;     // #class-one

For a general method to retrieve all classes you can do:

// Get a list of the classes of each matched element
let arrays = dom.a.class;     // #class-arrays
  // [['important'], ['button', 'cta'], ...]

// If you want a plain list with all of the classes:
let flatten = dom.a.class._flat;     // #class-flat
  // ['important', 'button', 'cta', ...]

// And if you just want an string with space-separated classes:
let text = dom.a.class._text;     // #class-text
  // 'important button cta ...'

Add a class

// Add the class 'test' (different ways)
dom.a.class.test = true;    // #class-make-true
dom.a.class = 'test';       // #class-push

Remove a class

// Remove the class 'test'
dom.a.class.test = false;    // #class-make-false


Did we say it returns a simple array?

dom.a.forEach(link => link.innerHTML = 'I am a link');

But what an interesting array it is; indeed we are also proxy'ing it so you can manipulate its sub-elements straight from the selector:

// Replace all of the link's html with 'I am a link'
dom.a.html = 'I am a link';

Of course we might want to manipulate them dynamically depending on the current value. Just pass it a function:

// Append ' ^_^' to all of the links in the page
dom.a.html = html => html + ' ^_^';

// Same as this:
dom.a.forEach(link => link.innerHTML = link.innerHTML + ' ^_^');

Note: this won't work dom.a.html += ' ^_^'; for more than 1 match (for reasons)

Or get into genetics to manipulate the attributes: = '_blank';

// Only to external sites:
let isOwnPage = el => /^https?\:\/\/mypage\.com/.test(el.getAttribute('href')); = (prev, i, element) => isOwnPage(element) ? '' : '_blank';


You can also handle and trigger events:

// Handle click events for all <a> = e => ...;

// Trigger click event for all <a>;


We are using Jest as a Grunt task for testing. Install Jest and run in the terminal:

grunt watch

Download Details:

Author: franciscop
Source Code: 
License: MIT license

#javascript #es6 #dom 

Punith Raaj


The Ultimate Guide To Tik Tok Clone App With Firebase - Ep 2

The Ultimate Guide To Tik Tok Clone App With Firebase - Ep 2
In this video, I'm going to show you how to make a Cool Tik Tok App a new Instagram using Flutter,firebase and visual studio code.

In this tutorial, you will learn how to Upload a Profile Pic to Firestore Data Storage.

🚀 Nice, clean and modern TikTok Clone #App #UI made in #Flutter⚠️

Starter Project :

► Timestamps 
0:00 Intro 0:20 
Upload Profile Screen 
16:35 Image Picker
20:06 Image Cropper 
24:25 Firestore Data Storage Configuration.

⚠️ IMPORTANT: If you want to learn, I strongly advise you to watch the video at a slow speed and try to follow the code and understand what is done, without having to copy the code, and then download it from GitHub.

► Social Media 

► Previous Episode :
► Playlist:

I hope you liked it, and don't forget to like,comment, subscribe, share this video with your friends, and star the repository on GitHub!
⭐️ Thanks for watching the video and for more updates don't forget to click on the notification. 
⭐️Please comment your suggestion for my improvement. 
⭐️Remember to like, subscribe, share this video, and star the repo on Github :)

Hope you enjoyed this video!
If you loved it, you can Buy me a coffee :

LIKE & SHARE & ACTIVATE THE BELL Thanks For Watching :-)

#flutter tutorial - tiktok clone with firebase #flutter challenge @tiktokclone #fluttertutorial firebase #flutter firebase #flutter pageview #morioh #flutter

Punith Raaj


Flutter Hotel Booking UI - Book your Stay At A New Hotel With Flutter - Ep1
Flutter Hotel Booking UI - Book your Stay At A New Hotel With Flutter - Ep1
#flutter #fluttertravelapp #hotelbookingui #flutter ui design 

In this video, I'm going to show you how to make a Cool Hotel Booking App using Flutter and visual studio code. 

In this tutorial, you will learn how to create a Splash Screen and Introduction Screen, how to implement a SmoothPageIndicator in Flutter. 

🚀 Nice, clean and modern Hotel Booking #App #UI made in #Flutter 

⚠️ IMPORTANT: If you want to learn, I strongly advise you to watch the video at a slow speed and try to follow the code and understand what is done, without having to copy the code, and then download it from GitHub. 

► Social Media 





I hope you liked it, and don't forget to like,comment, subscribe, share this video with your friends, and star the repository on GitHub! 

⭐️ Thanks for watching the video and for more updates don't forget to click on the notification.⭐️Please comment your suggestion for my improvement. ⭐️Remember to like, subscribe, share this video, and star the repo on Github :)Hope you enjoyed this video! If you loved it, you can Buy me a coffee :

#flutter riverpod #flutter travel app #appointment app flutter #morioh