TabooSun/overlay_tutorial

overlay_tutorial

A Flutter package for displaying overlay tutorial.

Feature

• Allow to display an overlay tutorial with hole cropping.
• Allow to display hint aside hole.
• Allow to customize hole shape.

Usage

Wrap the widget that you want to create a hole using OverlayTutorialHole. Ensure you have OverlayTutorialScope as a parent of these holes.

1. Use OverlayTutorialScope.enabled property to control the visibility of the overlay tutorial. If this is false, the entire overlay tutorial will be hidden.
2. Use OverlayTutorialHole.enabled property to control the visibility of the holes.

Wrap your UI

Widget build(BuildContext context) {
  final textTheme = Theme.of(context).textTheme;
  const tutorialColor = Colors.yellow;
  return SafeArea(
    child: Stack(
      children: [
        OverlayTutorialScope(
          enabled: _isTutorialEnabled,
          overlayColor: Colors.blueAccent.withOpacity(.6),
          // Disable all the widgets. All the widgets are now non-interactive.
          child: AbsorbPointer(
            absorbing: _isTutorialEnabled,
            child: Scaffold(
              appBar: AppBar(
                title: Text(widget.title),
              ),
              body: Center(
                child: Column(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: <Widget>[
                    AnimatedBuilder(
                      animation: _tweenAnimation,
                      builder: (context, child) {
                        return SlideTransition(
                          position: _tweenAnimation,
                          child: child,
                        );
                      },
                      child: OverlayTutorialHole(
                        enabled: true,
                        overlayTutorialEntry: OverlayTutorialCustomShapeEntry(
                          shapeBuilder: (rect, path) {
                            path = Path.combine(
                              PathOperation.difference,
                              path,
                              Path()
                                ..addOval(Rect.fromLTWH(
                                  rect.left - 16,
                                  rect.top,
                                  112,
                                  64,
                                )),
                            );
                            return path;
                          },
                        ),
                        child: const Icon(
                          Icons.share,
                          size: 64,
                        ),
                      ),
                    ),
                    const SizedBox(height: 64),
                    const Text(
                      'You have pushed the button this many times:',
                    ),
                    OverlayTutorialHole(
                      enabled: true,
                      overlayTutorialEntry: OverlayTutorialRectEntry(
                        padding: const EdgeInsets.symmetric(horizontal: 8.0),
                        radius: const Radius.circular(16.0),
                        overlayTutorialHints: <OverlayTutorialWidgetHint>[
                          OverlayTutorialWidgetHint(
                            position: (rect) => Offset(0, rect.bottom),
                            builder: (context, entryRect) {
                              return SizedBox(
                                width: MediaQuery.of(context).size.width,
                                child: Center(
                                  child: Padding(
                                    padding: const EdgeInsets.all(8.0),
                                    child: Text(
                                      'Current Counter will be displayed here',
                                      style: textTheme.bodyText2!
                                          .copyWith(color: tutorialColor),
                                    ),
                                  ),
                                ),
                              );
                            },
                          ),
                        ],
                      ),
                      child: Text(
                        '$_counter',
                        style: Theme.of(context).textTheme.headline4,
                      ),
                    ),
                  ],
                ),
              ),
              floatingActionButton: OverlayTutorialHole(
                enabled: true,
                overlayTutorialEntry: OverlayTutorialRectEntry(
                  padding: const EdgeInsets.all(8.0),
                  radius: const Radius.circular(16.0),
                  overlayTutorialHints: [
                    OverlayTutorialWidgetHint(
                      builder: (context, entryRect) {
                        return Positioned(
                          top: entryRect.rRect!.top - 24.0,
                          left: entryRect.rRect!.left,
                          child: Text(
                            'Try this out',
                            style: textTheme.bodyText2!
                                .copyWith(color: tutorialColor),
                          ),
                        );
                      },
                    ),
                    OverlayTutorialWidgetHint(
                      position: (rect) => Offset(0, rect.center.dy),
                      builder: (context, entryRect) {
                        return SizedBox(
                          width: entryRect.rRect!.left,
                          child: Padding(
                            padding: const EdgeInsets.only(right: 8.0),
                            child: Row(
                              mainAxisAlignment: MainAxisAlignment.end,
                              children: [
                                Flexible(
                                  child: Text(
                                    'Click here to add counter',
                                    style: textTheme.bodyText2!
                                        .copyWith(color: tutorialColor),
                                  ),
                                ),
                              ],
                            ),
                          ),
                        );
                      },
                    ),
                  ],
                ),
                child: FloatingActionButton(
                  onPressed: _incrementCounter,
                  tooltip: 'Increment',
                  child: const Icon(Icons.add),
                ),
              ),
            ),
          ),
        ),
        if (_isTutorialEnabled)
          Align(
            alignment: Alignment.topRight,
            child: GestureDetector(
              onTap: () {
                _isTutorialEnabled = false;
                setState(() {});
              },
              child: Padding(
                padding: const EdgeInsets.all(8.0),
                child: Container(
                  padding: const EdgeInsets.all(16),
                  decoration: const BoxDecoration(
                    shape: BoxShape.circle,
                    color: Colors.black,
                  ),
                  child: const Icon(
                    Icons.close,
                    color: Colors.red,
                  ),
                ),
              ),
            ),
          ),
      ],
    ),
  );
}

Hole Shape

• OverlayTutorialRectEntry draws a Rectangle shape
• OverlayTutorialCircleEntry draws a Circle shape
• OverlayTutorialCustomShapeEntry allows to draw a customized shape

Disabling Widget

Disabling widget is not provided by this package out of the box. You can achieve this using one of the Flutter widget: AbsorbPointer or IgnorePointer. Make sure you do not wrap the OverlayTutorialScope with these widgets as this will disable the widget in OverlayTutorialWidgetHint.

Screenshot

https://github.com/TabooSun/overlay_tutorial/blob/main/example/images/example_gif.gif?raw=true

API

Check Dart Documentation

License

License.