story 1.1.0

Instagram stories like UI with rich animations and customizability.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:story/story_image.dart';
import 'package:story/story_page_view.dart';

void main() {
  runApp(const MyApp());
}

class UserModel {
  UserModel(this.stories, this.userName, this.imageUrl);

  final List<StoryModel> stories;
  final String userName;
  final String imageUrl;
}

class StoryModel {
  StoryModel(this.imageUrl);

  final String imageUrl;
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: const MyHomePage(),
    );
  }
}

class MyHomePage extends StatelessWidget {
  const MyHomePage({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            ElevatedButton(
              child: const Text('show stories'),
              onPressed: () {
                Navigator.push(
                  context,
                  MaterialPageRoute(
                    builder: (context) {
                      return const StoryPage();
                    },
                  ),
                );
              },
            ),
          ],
        ),
      ),
    );
  }
}

final sampleUsers = [
  UserModel([
    StoryModel(
        "https://images.unsplash.com/photo-1601758228041-f3b2795255f1?ixid=MXwxMjA3fDF8MHxlZGl0b3JpYWwtZmVlZHwxN3x8fGVufDB8fHw%3D&ixlib=rb-1.2.1&auto=format&fit=crop&w=500&q=60"),
    StoryModel(
        "https://images.unsplash.com/photo-1609418426663-8b5c127691f9?ixid=MXwxMjA3fDB8MHxlZGl0b3JpYWwtZmVlZHwyNXx8fGVufDB8fHw%3D&ixlib=rb-1.2.1&auto=format&fit=crop&w=500&q=60"),
    StoryModel(
        "https://images.unsplash.com/photo-1609444074870-2860a9a613e3?ixid=MXwxMjA3fDB8MHxlZGl0b3JpYWwtZmVlZHw1Nnx8fGVufDB8fHw%3D&ixlib=rb-1.2.1&auto=format&fit=crop&w=500&q=60"),
    StoryModel(
        "https://images.unsplash.com/photo-1609504373567-acda19c93dc4?ixid=MXwxMjA3fDB8MHxlZGl0b3JpYWwtZmVlZHw1MHx8fGVufDB8fHw%3D&ixlib=rb-1.2.1&auto=format&fit=crop&w=500&q=60"),
  ], "User1",
      "https://images.unsplash.com/photo-1609262772830-0decc49ec18c?ixid=MXwxMjA3fDB8MHxlZGl0b3JpYWwtZmVlZHwzMDF8fHxlbnwwfHx8&ixlib=rb-1.2.1&auto=format&fit=crop&w=500&q=60"),
  UserModel([
    StoryModel(
        "https://images.unsplash.com/photo-1609439547168-c973842210e1?ixid=MXwxMjA3fDB8MHxlZGl0b3JpYWwtZmVlZHw4Nnx8fGVufDB8fHw%3D&ixlib=rb-1.2.1&auto=format&fit=crop&w=500&q=60"),
  ], "User2",
      "https://images.unsplash.com/photo-1601758125946-6ec2ef64daf8?ixid=MXwxMjA3fDF8MHxlZGl0b3JpYWwtZmVlZHwzMjN8fHxlbnwwfHx8&ixlib=rb-1.2.1&auto=format&fit=crop&w=500&q=60"),
  UserModel([
    StoryModel(
        "https://images.unsplash.com/photo-1609421139394-8def18a165df?ixid=MXwxMjA3fDB8MHxlZGl0b3JpYWwtZmVlZHwxMDl8fHxlbnwwfHx8&ixlib=rb-1.2.1&auto=format&fit=crop&w=500&q=60"),
    StoryModel(
        "https://images.unsplash.com/photo-1609377375732-7abb74e435d9?ixid=MXwxMjA3fDB8MHxlZGl0b3JpYWwtZmVlZHwxODJ8fHxlbnwwfHx8&ixlib=rb-1.2.1&auto=format&fit=crop&w=500&q=60"),
    StoryModel(
        "https://images.unsplash.com/photo-1560925978-3169a42619b2?ixid=MXwxMjA3fDB8MHxlZGl0b3JpYWwtZmVlZHwyMjF8fHxlbnwwfHx8&ixlib=rb-1.2.1&auto=format&fit=crop&w=500&q=60"),
  ], "User3",
      "https://images.unsplash.com/photo-1609127102567-8a9a21dc27d8?ixid=MXwxMjA3fDB8MHxlZGl0b3JpYWwtZmVlZHwzOTh8fHxlbnwwfHx8&ixlib=rb-1.2.1&auto=format&fit=crop&w=500&q=60"),
];

class StoryPage extends StatefulWidget {
  const StoryPage({Key? key}) : super(key: key);

  @override
  _StoryPageState createState() => _StoryPageState();
}

class _StoryPageState extends State<StoryPage> {
  late ValueNotifier<IndicatorAnimationCommand> indicatorAnimationController;

  @override
  void initState() {
    super.initState();
    indicatorAnimationController = ValueNotifier<IndicatorAnimationCommand>(
        IndicatorAnimationCommand.resume);
  }

  @override
  void dispose() {
    indicatorAnimationController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: StoryPageView(
        itemBuilder: (context, pageIndex, storyIndex) {
          final user = sampleUsers[pageIndex];
          final story = user.stories[storyIndex];
          return Stack(
            children: [
              Positioned.fill(
                child: Container(color: Colors.black),
              ),
              Positioned.fill(
                child: StoryImage(
                  key: ValueKey(story.imageUrl),
                  imageProvider: NetworkImage(
                    story.imageUrl,
                  ),
                  fit: BoxFit.fitWidth,
                ),
              ),
              Padding(
                padding: const EdgeInsets.only(top: 44, left: 8),
                child: Row(
                  children: [
                    Container(
                      height: 32,
                      width: 32,
                      decoration: BoxDecoration(
                        image: DecorationImage(
                          image: NetworkImage(user.imageUrl),
                          fit: BoxFit.cover,
                        ),
                        shape: BoxShape.circle,
                      ),
                    ),
                    const SizedBox(
                      width: 8,
                    ),
                    Text(
                      user.userName,
                      style: const TextStyle(
                        fontSize: 17,
                        color: Colors.white,
                        fontWeight: FontWeight.bold,
                      ),
                    ),
                  ],
                ),
              ),
            ],
          );
        },
        gestureItemBuilder: (context, pageIndex, storyIndex) {
          return Stack(children: [
            Align(
              alignment: Alignment.topRight,
              child: Padding(
                padding: const EdgeInsets.only(top: 32),
                child: IconButton(
                  padding: EdgeInsets.zero,
                  color: Colors.white,
                  icon: const Icon(Icons.close),
                  onPressed: () {
                    Navigator.pop(context);
                  },
                ),
              ),
            ),
            if (pageIndex == 0)
              Center(
                child: ElevatedButton(
                  child: const Text('show modal bottom sheet'),
                  onPressed: () async {
                    indicatorAnimationController.value =
                        IndicatorAnimationCommand.pause;
                    await showModalBottomSheet(
                      context: context,
                      builder: (context) => SizedBox(
                        height: MediaQuery.of(context).size.height / 2,
                        child: Padding(
                          padding: const EdgeInsets.all(24),
                          child: Text(
                            'Look! The indicator is now paused\n\n'
                            'It will be coutinued after closing the modal bottom sheet.',
                            style: Theme.of(context).textTheme.headlineSmall,
                            textAlign: TextAlign.center,
                          ),
                        ),
                      ),
                    );
                    indicatorAnimationController.value =
                        IndicatorAnimationCommand.resume;
                  },
                ),
              ),
          ]);
        },
        indicatorAnimationController: indicatorAnimationController,
        initialStoryIndex: (pageIndex) {
          if (pageIndex == 0) {
            return 1;
          }
          return 0;
        },
        pageLength: sampleUsers.length,
        storyLength: (int pageIndex) {
          return sampleUsers[pageIndex].stories.length;
        },
        onPageLimitReached: () {
          Navigator.pop(context);
        },
      ),
    );
  }
}