flutter_intro 3.1.2

A better way for new feature introduction and step-by-step users guide for your Flutter project.

flutter_intro

A better way for new feature introduction and step-by-step users guide for your Flutter project.

Since I no longer work at Tal, the repository has been moved from https://github.com/tal-tech/flutter_intro to here.

This is 3.x version, if you find 2.x documentation, click here.

I completely rewritten the 3.0 version, and the usage is clearer and more concise.

Automatically adapt when the device screen orientation is switched.

Custom rendering and dynamic component rendering are also a breeze.

Usage

To use this package, add flutter_intro as a dependency in your pubspec.yaml file.

Init

Wrap the app root widget with Intro, also you can set some global properties on Intro.

import 'package:flutter_intro/flutter_intro.dart';

Intro(
  /// The padding of the highlighted area and the widget
  padding: const EdgeInsets.all(8),

  /// Border radius of the highlighted area
  borderRadius: BorderRadius.all(Radius.circular(4)),

  /// The mask color of step page
  maskColor: const Color.fromRGBO(0, 0, 0, .6);

  /// No animation
  noAnimation: false;

  /// Click on whether the mask is allowed to be closed.
  maskClosable: false;

  /// Custom button text
  buttonTextBuilder: (order) =>
      order == 3 ? 'Custom Button Text' : 'Next',

  child: const YourApp(),
)

Add guided widget

This time, the IntroStepBuilder class is added to do this, which solves the problem that the previous version could not dynamically add a guide.

IntroStepBuilder(
  /// Guide order, can not be repeated with other
  order: 1,
  /// At least one of text and overlayBuilder
  /// Use text to quickly add leading text
  text: 'guide text',
  /// Using overlayBuilder can be more customized, please refer to advanced usage in example
  overlayBuilder: (params) {
    ///
  }
  /// You can specify configuration for individual guide here
  borderRadius: const BorderRadius.all(Radius.circular(64)),
  builder: (context, key) => NeedGuideWidget(
    /// You should bind key here.
    key: key,
  ),
)

Run

That's it!

Intro.of(context).start();

Advanced Usage

IntroStepBuilder(
  ...,
  overlayBuilder: (StepWidgetParams params) {
    return YourOverlay();
  },
)

StepWidgetParams provides all the parameters needed to generate the guide overlay.

Troubleshoot

Q1. What if the highlighted area is not displayed completely?

A1. That's because Intro provides 8px padding by default.

We can change it by setting the value of padding.

Intro(
  ...,
  /// Set it to zero
  padding: EdgeInsets.zero,
  child: const YourApp(),
);

---

Q2. Can I set different configurations for each step?

A2. Yes, you can set in every IntroStepBuilder.

IntroStepBuilder(
  ...,
  padding: const EdgeInsets.symmetric(
    vertical: -5,
    horizontal: -5,
  ),
  borderRadius: const BorderRadius.all(Radius.circular(64)),
  builder: (context, key) => YourWidget(),
)

---

Q3. Can I make the highlight area smaller?

A3. You can do it by setting padding to a negative number.

IntroStepBuilder(
  ...,
  padding: const EdgeInsets.symmetric(
    vertical: -5,
    horizontal: -5,
  ),
  builder: (context, key) => YourWidget(),
)

---

Q4. How can I manually destroy the guide page, such as the user pressing the back button?

A4. You can call the dispose method of the intro instance.

WillPopScope(
  child: Scaffold(...),
  onWillPop: () async {
    Intro intro = Intro.of(context);

    if (intro.status.isOpen == true) {
      intro.dispose();
      return false;
    }
    return true;
  },
)

Q5. WillPopScope is deprecated, is there any better solution?

A5. In version 3.1.0, ValueNotifier<IntroStatus> statusNotifier is added. You can achieve the same effect through the following sample code.

ValueListenableBuilder(
  valueListenable: intro.statusNotifier,
  builder: (context, value, child) {
    return PopScope(
      canPop: !intro.status.isOpen,
      onPopInvoked: (didPop) {
        if (!didPop) {
          intro.dispose();
        }
      },
      child: Scaffold(...),
    );
  },
)

Example

Please check the example in example/lib/main.dart.