transformer_page_view 0.0.9

  • Example
  • Installing
  • Versions
  • new44

Build Status PRs Welcome pub package


PageTransformer for flutter

Very simple to use

import 'package:transformer_page_view/transformer_page_view.dart';


new TransformerPageView(
loop: true,
transformer: new AccordionTransformer(),
itemBuilder: (BuildContext context, int index) {
  return new Container(
    color: list[index%list.length],
    child: new Center(
      child: new Text("$index",style: new TextStyle(fontSize: 80.0,color: Colors.white),),
itemCount: 3)

Almost the same as PageView.builder, simplely specify a transformer to TransformerPageView, which is a sub class of PageTransformer

Show cases


Welcome view



See code here


See code here


See code here


See code here


See code here


See code here

Getting Started




to your pubspec.yaml ,and run

flutter packages get 

in your project's root directory.

Basic Usage

scrollDirectionAxis.horizontalIf Axis.horizontal, the scroll view's children are arranged horizontally in a row instead of vertically in a column.
loopfalseSet to true to enable continuous loop mode.
indexnoneIndex number of initial slide. if not set , it is controlled by the widget itself,otherwise, it is controlled by another widget, which is returned by itemBuilder
onPageChangedvoid onPageChanged(int index)Called with the new index when the user swiped
durationnew Duration(milliseconds:300)The milliseconds of every transaction animation costs
transformernoneThe most important property of this widget, it returns a transformed widget that based on the widget parameter. If the value is null, a itemBuilder must be specified
itemCountnoneNumber of the total items
itemBuildernoneA function that returns a widget based on index,if it's null,a transformer must be specified

Build-in Parallax

We provide 3 build-in parallaxes, which handle color、image and container


ParallaxColor handles the color transform, which controls the color transform from one to another.


ParallaxImage handles the image, which speed is slower than the PageView


ParallaxContainer handles the text or other staff, which speed is faster than the PageView

3 build-in parallaxes are all used in subclass of PageTransform,group these parallaxes together, we can create very cool things.

Inspired by page-transformer, and we have an easier way to create this.

See code here

Custom animation

[0.0.8] - [2018.09.20]

* Ignore not valid event

[0.0.7] - [2018.09.20]

* Fix bugs

[0.0.6] - [2018.09.20]

* Fix bugs

[0.0.5] - [2018.09.19]

* Fix bugs

[0.0.4] - [2018.09.19]

* Fix bugs

[0.0.2] - [2018.08.30]

* Update readme

[0.0.1] - [2018.08.30]

* Basic animation


import 'package:example/buildin_transformers.dart';
import 'package:example/images.dart';
import 'package:flutter/material.dart';

import 'package:transformer_page_view/transformer_page_view.dart';

import 'package:flutter/cupertino.dart';

// 1111111 !!!!!!

void main() => runApp(new MyApp());
List<Color> list = [Colors.yellow,,];

List<String> images = [

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: 'Flutter Demo',
      theme: new ThemeData(
      home: new MyHomePage(title: 'Flutter Demo Home Page'),

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

  _MyHomePageState createState() => new _MyHomePageState();

class _MyHomePageState extends State<MyHomePage> {
  IndexController _controller;
  List<String> _types = [

  String _type;
  FixedExtentScrollController controller;
  int _index = 0;
  double _viewportFraction = 1.0;

  void initState() {
    _controller = new IndexController();
    _type = "AccordionTransformer";
    controller = new FixedExtentScrollController();

  PageTransformer getTransformer() {
    switch (_type) {
      case 'AccordionTransformer':
        return new AccordionTransformer();
      case 'ThreeDTransformer':
        return new ThreeDTransformer();
      case 'ScaleAndFadeTransformer':
        return new ScaleAndFadeTransformer();
      case 'ZoomInPageTransformer':
        return new ZoomInPageTransformer();
      case 'ZoomOutPageTransformer':
        return new ZoomOutPageTransformer();
      case 'DeepthPageTransformer':
        return new DeepthPageTransformer();

    throw new Exception("Not a type");

  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: new Text(widget.title),
        actions: <Widget>[
          new Center(
            child: new InkWell(
              child: new Text("Images"),
              onTap: (){
                Navigator.of(context).push(new MaterialPageRoute(builder: (b){

                  return new Scaffold(
                    body: new ImageTest(),

      body: new Column(
        children: <Widget>[
          new Row(
            children: <Widget>[
              new RaisedButton(
                onPressed: () {
                child: new Text("Preious"),
              new SizedBox(
                width: 8.0,
              new RaisedButton(
                onPressed: () {
                child: new Text("Next"),
              new SizedBox(
                width: 8.0,
              new RaisedButton(
                onPressed: () {
                      context: context,
                      builder: (_) {
                        return new CupertinoPicker(
                            scrollController: controller,
                            itemExtent: 30.0,
                            onSelectedItemChanged: (int index) {
                              setState(() {
                                controller = new FixedExtentScrollController(
                                    initialItem: index);
                                _type = _types[index];
                                if (_type == 'ScaleAndFadeTransformer') {
                                  _viewportFraction = 0.8;
                                } else {
                                  _viewportFraction = 1.0;
                            children: => new Text(t)).toList());
                child: new Text("Change Animation"),
          new Expanded(
              child: new SizedBox(
            child: new TransformerPageView(
                loop: true,
                viewportFraction: _viewportFraction,
                controller: _controller,
                transformer: getTransformer(),
                onPageChanged: (int index){
                  setState(() {
                    _index = index;
                itemBuilder: (BuildContext context, int index) {
                  return new Image.asset(
                    fit: BoxFit.fill,
                itemCount: 3),

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  transformer_page_view: ^0.0.9

2. Install it

You can install packages from the command line:

with Flutter:

$ flutter packages get

Alternatively, your editor might support flutter packages get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:transformer_page_view/transformer_page_view.dart';
Version Uploaded Documentation Archive
0.0.9 Sep 20, 2018 Go to the documentation of transformer_page_view 0.0.9 Download transformer_page_view 0.0.9 archive
0.0.8 Sep 20, 2018 Go to the documentation of transformer_page_view 0.0.8 Download transformer_page_view 0.0.8 archive
0.0.7 Sep 20, 2018 Go to the documentation of transformer_page_view 0.0.7 Download transformer_page_view 0.0.7 archive
0.0.6 Sep 20, 2018 Go to the documentation of transformer_page_view 0.0.6 Download transformer_page_view 0.0.6 archive
0.0.5 Sep 19, 2018 Go to the documentation of transformer_page_view 0.0.5 Download transformer_page_view 0.0.5 archive
0.0.4 Sep 18, 2018 Go to the documentation of transformer_page_view 0.0.4 Download transformer_page_view 0.0.4 archive
0.0.2 Aug 30, 2018 Go to the documentation of transformer_page_view 0.0.2 Download transformer_page_view 0.0.2 archive
0.0.1 Aug 30, 2018 Go to the documentation of transformer_page_view 0.0.1 Download transformer_page_view 0.0.1 archive
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Learn more about scoring.

We analyzed this package on Sep 20, 2018, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.0.0
  • pana: 0.12.3
  • Flutter: 0.8.4


Detected platforms: Flutter

References Flutter, and has no conflicting libraries.


The description is too short.

Add more detail about the package, what it does and what is its target use case. Try to write at least 60 characters.

Package is pre-v0.1 release.

While there is nothing inherently wrong with versions of 0.0.*, it usually means that the author is still experimenting with the general direction of the API.

Format lib/index_controller.dart.

Run flutter format to format lib/index_controller.dart.

Format lib/parallax.dart.

Run flutter format to format lib/parallax.dart.

Format lib/transformer_page_view.dart.

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Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.0.0-dev.50.0 <3.0.0
flutter 0.0.0
Transitive dependencies
collection 1.14.11
meta 1.1.6
sky_engine 0.0.99
typed_data 1.1.6
vector_math 2.0.8
Dev dependencies