ShowCaseView #

A Flutter package allows you to Showcase/Highlight your widgets step by step.

Preview #

The example app running in Android

Migration guide for release 2.0.0 #

Renamed properties/fields of widgets mentioned below in the table.

Before	After
autoPlayLockEnable	enableAutoPlayLock
shapeBorder	targetShapeBorder
showcaseBackgroundColor	tooltipBackgroundColor
contentPadding	tooltipPadding
overlayPadding	targetPadding
radius	targetBorderRadius
tipBorderRadius	tooltipBorderRadius
disableAnimation	disableMovingAnimation
animationDuration	movingAnimationDuration

Removed unused parameter of Showcase.withWidget() mentioned below:

title
titleAlignment
titleTextStyle
description
descriptionAlignment
descTextStyle
textColor
tooltipBackgroundColor
tooltipBorderRadius
tooltipPadding

Installing #

Add dependency to pubspec.yaml

Get the latest version in the 'Installing' tab on pub.dev

dependencies:
    showcaseview: <latest-version>

Import the package

import 'package:showcaseview/showcase_tutorial.dart';

Adding a ShowCaseWidget widget.

ShowCaseWidget(
  builder: Builder(
    builder : (context)=> Somewidget()
  ),
),

Adding a Showcase widget.

GlobalKey _one = GlobalKey();
GlobalKey _two = GlobalKey();
GlobalKey _three = GlobalKey();

...

Showcase(
  key: _one,
  title: 'Menu',
  description: 'Click here to see menu options',
  child: Icon(
    Icons.menu,
    color: Colors.black45,
  ),
),

Showcase.withWidget(
  key: _three,
  height: 80,
  width: 140,
  targetShapeBorder: CircleBorder(),
  container: Column(
    crossAxisAlignment: CrossAxisAlignment.start,
    children: <Widget>[
      ...
    ],
  ),
  child: ...,
),

Starting the ShowCase

someEvent(){
    ShowCaseWidget.of(context).startShowCase([_one, _two, _three]);
}

If you want to start the ShowCaseView as soon as your UI built up then use below code.

WidgetsBinding.instance.addPostFrameCallback((_) =>
  ShowCaseWidget.of(context).startShowCase([_one, _two, _three])
);

Functions of `ShowCaseWidget.of(context)`: #

Function Name	Description
startShowCase(List	Starting the showcase
next()	Starts next showcase
previous()	Starts previous showcase
dismiss()	Dismisses all showcases

Properties of `ShowCaseWidget`: #

Name	Type	Default Behaviour	Description
blurValue	double	0	Provides blur effect on overlay
autoPlay	bool	false	Automatically display Next showcase
autoPlayDelay	Duration	Duration(milliseconds: 2000)	Visibility time of showcase when `autoplay` is enabled
enableAutoPlayLock	bool	false	Block the user interaction on overlay when autoPlay is enabled.
enableAutoScroll	bool	false	Allows to auto scroll to next showcase so as to make the given target visible.
scrollDuration	Duration	Duration(milliseconds: 300)	Time duration for auto scrolling
disableBarrierInteraction	bool	false	Disable barrier interaction
disableScaleAnimation	bool	false	Disable scale transition for all showcases
disableMovingAnimation	bool	false	Disable bouncing/moving transition for all showcases
onStart	Function(int?, GlobalKey)?		Triggered on start of each showcase.
onComplete	Function(int?, GlobalKey)?		Triggered on completion of each showcase.
onFinish	VoidCallback?		Triggered when all the showcases are completed
enableShowcase	bool	true	Enable or disable showcase globally.

Properties of `Showcase` and `Showcase.withWidget`: #

Name	Type	Default Behaviour	Description	`Showcase`	`ShowCaseWidget`
key	GlobalKey		Unique Global key for each showcase.	✅	✅
child	Widget		The Target widget that you want to be showcased	✅	✅
title	String?		Title of default tooltip	✅
description	String?		Description of default tooltip	✅
container	Widget?		Allows to create custom tooltip widget.		✅
height	double?		Height of custom tooltip widget		✅
width	double?		Width of custom tooltip widget		✅
titleTextStyle	TextStyle?		Text Style of title	✅
descTextStyle	TextStyle?		Text Style of description	✅
titleAlignment	TextAlign	TextAlign.start	Alignment of title	✅
descriptionAlignment	TextAlign	TextAlign.start	Alignment of description	✅
targetShapeBorder	ShapeBorder		If `targetBorderRadius` param is not provided then it applies shape border to target widget	✅	✅
targetBorderRadius	BorderRadius?		Border radius of target widget	✅	✅
tooltipBorderRadius	BorderRadius?	BorderRadius.circular(8.0)	Border radius of tooltip	✅
blurValue	double?	`ShowCaseWidget.blurValue`	Gaussian blur effect on overlay	✅	✅
tooltipPadding	EdgeInsets	EdgeInsets.symmetric(vertical: 8, horizontal: 8)	Padding to tooltip content	✅
targetPadding	EdgeInsets	EdgeInsets.zero	Padding to target widget	✅	✅
overlayOpacity	double	0.75	Opacity of overlay layer	✅	✅
overlayColor	Color	Colors.black45	Color of overlay layer	✅	✅
tooltipBackgroundColor	Color	Colors.white	Background Color of default tooltip	✅
textColor	Color	Colors.black	Color of tooltip text	✅
scrollLoadingWidget	Widget		Loading widget on overlay until active showcase is visible to viewport when `autoScroll` is enable	✅	✅
movingAnimationDuration	Duration	Duration(milliseconds: 2000)	Duration of time this moving animation should last.	✅	✅
showArrow	bool	true	Shows tooltip with arrow	✅
disableDefaultTargetGestures	bool	false	disable default gestures of target widget	✅	✅
disposeOnTap	bool?	false	Dismiss all showcases on target/tooltip tap	✅	✅
disableMovingAnimation	bool?	`ShowCaseWidget.disableMovingAnimation`	Disable bouncing/moving transition	✅	✅
disableScaleAnimation	bool?	`ShowCaseWidget.disableScaleAnimation`	Disable initial scale transition when showcase is being started and completed	✅
scaleAnimationDuration	Duration	Duration(milliseconds: 300)	Duration of time scale animation should last.	✅
scaleAnimationCurve	Curve	Curves.easeIn	Curve to use in scale animation.	✅
scaleAnimationAlignment	Alignment?		Origin of the coordinate in which the scale takes place, relative to the size of the box.	✅
onToolTipClick	VoidCallback?		Triggers when tooltip is being clicked.	✅
onTargetClick	VoidCallback?		Triggers when target widget is being clicked	✅	✅
onTargetDoubleTap	VoidCallback?		Triggers when target widget is being double clicked	✅	✅
onTargetLongPress	VoidCallback?		Triggers when target widget is being long pressed	✅	✅
tooltipPosition	TooltipPosition?		Defines vertical position of tooltip respective to Target widget	✅	✅
titlePadding	EdgeInsets?	EdgeInsets.zero	Padding to title	✅
descriptionPadding	EdgeInsets?	EdgeInsets.zero	Padding to description	✅

How to use #

Check out the example app in the example directory or the 'Example' tab on pub.dartlang.org for a more complete example.

Scrolling to active showcase #

Auto Scrolling to active showcase feature will not work properly in scroll views that renders widgets on demand(ex, ListView, GridView).

In order to scroll to a widget it needs to be attached with widget tree. So, If you are using a scrollview that renders widgets on demand, it is possible that the widget on which showcase is applied is not attached in widget tree. So, flutter won't be able to scroll to that widget.

So, If you want to make a scroll view that contains less number of children widget then prefer to use SingleChildScrollView.

If using SingleChildScrollView is not an option, then you can assign a ScrollController to that scrollview and manually scroll to the position where showcase widget gets rendered. You can add that code in onStart method of ShowCaseWidget.

Example,

// This controller will be assigned to respected sctollview.
final _controller = ScrollController();

ShowCaseWidget(
  onStart: (index, key) {
    if(index == 0) {
      WidgetsBinding.instance.addPostFrameCallback((_) {
       // If showcase widget is at offset 1000 in the listview.
       // If you don't know the exact position of the showcase widget,
       // You can provide nearest possible location.
       // 
       // In this case providing 990 instead of 1000 will work as well.
        _controller.jumpTo(1000);
      });
    }
  },
);