IntroductionScreen

Introduction screen allow you to have a screen at launcher for example, where you can explain your app. This Widget is very customizable with a great design.

Introduction_screen use another package, dots_indicator, that I also created.

Installation

You just need to add introduction_screen as a dependency in your pubspec.yaml file.

dependencies:
  introduction_screen: ^2.1.0

Example

Many parameters are available, in next section of example all are not listed. To see all parameters available please check end of README. If you want to display IntroductionScreen only once (e.g: first start of your app), use SharedPreferences (or similar) to save status (already display or not). It's not responsability of this package ot handle this.

In these example, listPagesViewModel is the list of pages. A page is base on PageViewModel. See example of a PageViewModel below.

PageViewModel

Simple page

This example only define title, body and an image (you can define any widget)

PageViewModel(
  title: "Title of first page",
  body: "Here you can write the description of the page, to explain someting...",
  image: Center(
    child: Image.network("https://domaine.com/image.png", height: 175.0),
  ),
)

Page with custom colors

This example show you how to define the color of the page

PageViewModel(
  title: "Title of first page",
  body: "Here you can write the description of the page, to explain someting...",
  image: Center(child: Image.asset("res/images/logo.png", height: 175.0)),
  decoration: const PageDecoration(
    pageColor: Colors.blue,
  ),
)

Page with custom text style

This example show you how to define another TextStyle for the title and the body

PageViewModel(
  title: "Title of first page",
  body: "Here you can write the description of the page, to explain someting...",
  image: const Center(child: Icon(Icons.android)),
  decoration: const PageDecoration(
    titleTextStyle: TextStyle(color: Colors.orange),
    bodyTextStyle: TextStyle(fontWeight: FontWeight.w700, fontSize: 20.0),
  ),
)

Page with a footer, like a button

This example show you how to define a page with a footer, like a Button

PageViewModel(
  title: "Title of first page",
  body: "Here you can write the description of the page, to explain someting...",
  image: const Center(child: Icon(Icons.android)),
  footer: ElevatedButton(
    onPressed: () {
      // On button presed
    },
    child: const Text("Let's Go !"),
  ),
);

Page with widget body

This example show you how to define a page with a body as Widget and not a simple String You can to the same this for title, with titleWidget parameter.

PageViewModel(
  title: "Title of first page",
  bodyWidget: Row(
    mainAxisAlignment: MainAxisAlignment.center,
    children: const [
      Text("Click on "),
      Icon(Icons.edit),
      Text(" to edit a post"),
    ],
  ),
  image: const Center(child: Icon(Icons.android)),
);

IntroductionScreen

Note :

If you not provide next parameter, the Next button will be not displayed. If you want to display a skip button, you must add skip parameter and showSkipButton: true.

The done parameter is required only if showDoneButton: true.

Simple intro screen

Simple intro screen

IntroductionScreen(
  pages: listPagesViewModel,
  done: const Text("Done", style: TextStyle(fontWeight: FontWeight.w600)),
  onDone: () {
    // When done button is press
  },
); //Material App

Intro screen with skip button

IntroductionScreen(
  pages: listPagesViewModel,
  onDone: () {
    // When done button is press
  },
  showSkipButton: true,
  skip: const Text("Skip"),
  done: const Text("Done", style: TextStyle(fontWeight: FontWeight.w600)),
);

Intro screen with custom button text and dots indicators

IntroductionScreen(
  pages: listPagesViewModel,
  onDone: () {
    // When done button is press
  },
  onSkip: () {
    // You can also override onSkip callback
  },
  showSkipButton: true,
  skip: const Icon(Icons.skip_next),
  next: const Icon(Icons.next),
  done: const Text("Done", style: TextStyle(fontWeight: FontWeight.w600)),
  dotsDecorator: DotsDecorator(
    size: const Size.square(10.0),
    activeSize: const Size(20.0, 10.0),
    activeColor: theme.accentColor,
    color: Colors.black26,
    spacing: const EdgeInsets.symmetric(horizontal: 3.0),
    activeShape: RoundedRectangleBorder(
      borderRadius: BorderRadius.circular(25.0)
    )
  ),
);

Intro screen with custom button colors

When one of the colors such as skipColor is defined, color will be ignored.

IntroductionScreen(
  pages: listPagesViewModel,
  done: const Text("Done", style: TextStyle(fontWeight: FontWeight.w600)),
  color: Colors.orange,  
  skipColor: Colors.red,  
  doneColor: Colors.green,  
  nextColor: Colors.blue,
  onDone: () {
    // When done button is press
  },
); 

Parameters of IntroductioonScreen widget

Many parameters can be used to customized Intro like you want ! This is all parameters you can add :

• Page that will be display (PageViewModel), by adding pages: [..] parameter.
• Use your own pages (Widget) without using those predefined, by adding rawPages: [..] parameter.
  • If you provide both rawPages and pages parameter, pages will be used.
• Set a custom callback when done button is pressed, by adding onDone: () {} parameter.
  • This param is required, except if you set showDoneButton: false
• Define Done button (Widget), by adding done: Text('Done')
  • This param is required, except if you set showDoneButton: false
• Set a custom callback when skip button is pressed, by adding onSkip: () {} parameter.
  • By default, it will go to the last page
• Add callback to listen page changes, by adding onChange: (page) {} parameter.
• Define Skip button (Widget), by adding skip: Text('Skip')
  • This param is required if you set showSkipButton: true
• Define Next button (Widget), by adding next: Text('Next')
  • This param is required, except if you set showNextButton: false
• Hide/show Skip button, by adding showSkipButton: false parameter. (Default false)
• Hide/show Next button, by adding showNextButton: false parameter. (Default true)
• Hide/show Done button, by adding showDoneButton: false parameter. (Default true)
• Display or not the progress dots, by adding isProgress: false parameter. (Default true)
• Enable or disable dots progress tap, by adding isProgressTap: false parameter. (Default true)
• Freeze the scroll, by adding freeze: true parameter. (Default false)
• Global background color, by adding globalBackgroundColor: Colors.blue parameter.
  • Tips: use Colors.transparent to display an image as background (using Stack with IntroductionScreen inside for example)
• Customize dots (progression) by adding dotsDecorator: DotsDecorator(...)
  • You can customize dots size, shape, colors, spacing.
• Customize dots container by adding dotsContainerDecorator: BoxDecorator(...)
  • You can customize container that contain controls.
• Duration of scrolling animation, by adding animationDuration: 400 parameter. (Default 350)
• Initial page, by adding initialPage: 2 parameter. (Default 0)
• Skip button flex, by adding skipFlex: 1 parameter. (Set 0 to disable Expanded behaviour, default 1)
• Dots indicator flex, by adding dotsFlex: 1 parameter. (Set 0 to disable Expanded behaviour, default 1)
• Next/Done button flex, by adding nextFlex: 1 parameter. (Set 0 to disable Expanded behaviour, default 1)
• Animation curve between pages, by adding curve: Curves.elasticIn parameter. (Default Curves.easeIn)
• Change global color of buttons (skip, next, done), by adding color: Colors.yellow parameter.
• Change skip button color, by adding skipColor: Colors.red parameter.
• Change next button color, by adding nextColor: Colors.green parameter.
• Change done button color, by adding doneColor: Colors.blue parameter.
• Enable or disable SafeArea on top, by adding isTopSafeArea: true parameter (Default false).
• Enable or disable SafeArea on bottom, by adding isBottomSafeArea: true parameter. (Default false)
• Customize margin of controls's container, by adding controlsMargin: EdgeInsets.all(16.0) parameter. (Default EdgeInsets.zero)
• Customize padding of controls's container, by adding controlsPadding: EdgeInsets.all(8.0) parameter. (Default EdgeInsets.all(16.0)
• Add global header (top), static and displayed above pages, by adding globalHeader: Image.asset(...) parameter.
• Add global footer below controls/dots, by adding globalFooter: ElevatedButton(...) parameter.
• Provide a scrollController for scrollView inside pages, by adding scrollController parameter.
  • Will be ignored for page(s) if useScrollView is set to false in PageViewModel(s)
• Change axis of scroll by adding pagesAxis: Axis.vertical. (Default Axis.horizontal)
• Change default scroll physics of PageView by adding scrollPhysics: ClampingScrollPhysics(). (Default BouncingScrollPhysics())
• You can also enable right-to-left behavious by adding rtl: true. (Default false)

Parameters of PageViewModel (each pages)

You can also provide many parameter to customize each pages :

• title: "Title of the page" or titleWidget: Text("Custom widget for title")
• body: "Body of the page" or bodyWidget: Text("Custom widget for body")
• image: Image.asset(...) image of the page.
  • It's expecting a Widget, so if you want to pass a Video, Text, or anything else, you can.
• footer: ElevatedButton(...), display a widget below body
  • Like image param, it's expecting a Widget, you can pass what you want.
• decoration: PageDecoration(...), page decoration to customize page
  • See next section for all parameters you can pass
• reverse: true, reverse order of image and content (title/body). (Default: false)
• useScrollView: false, by default pages use a Scrollview to handle small screen or long body text. You can remove ScrollView by setting to false.

Parameters of PageDecoration (decoration of a page)

• pageColor: Colors.white, background color of the page
  • You cannot use both pageColor and boxDecoration params
• titleTextStyle: TextStyle(...), TextStyle of the title
• bodyTextStyle: TextStyle(...), TextStyle of the body
• boxDecoration: BoxDecoration(...), BoxDecoration of page container
  • You cannot use both pageColor and boxDecoration params
• imageFlex: 2, flex ratio of the image
• bodyFlex: 3, flex ratio of the content (title/body)
• imagePadding: EdgeInsets.only(bottom: 12.0), padding of the image Widget. (Default EdgeInsets.only(bottom: 24.0))
• contentPadding: EdgeInsets.only(all: 24.0), padding of the content (title/body/footer) Widget. (Default EdgeInsets.all(16))
• titlePadding: EdgeInsets.only(bottom: 24.0), padding of the title text/Widget. (Default EdgeInsets.only(top: 16.0, bottom: 24.0))
• descriptionPadding: EdgeInsets.only(bottom: 24.0), padding of the body text/Widget. (Default EdgeInsets.zero)
• footerPadding: EdgeInsets.only(top: 24.0), padding of the footer text/Widget. (Default EdgeInsets.symmetric(vertical: 24.0))
• bodyAlignment: Align.center, content (title, body, footer) alignment. (Default Align.topCenter)
• imageAlignment: Align.center, image alignment. (Default Align.bottomCenter)
• fullScreen: true, Set image as fullscreen (background). (Default false)