showcase_tutorial

Description:

showcase tutorial

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

Migration guide for release 1.0.0 #
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>
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Import the package

import 'package:showcaseview/showcase_tutorial.dart';
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Adding a ShowCaseWidget widget.

ShowCaseWidget(
builder: Builder(
builder : (context)=> Somewidget()
),
),
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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: ...,
),
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Starting the ShowCase

someEvent(){
ShowCaseWidget.of(context).startShowCase([_one, _two, _three]);
}
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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])
);
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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);
});
}
},
);
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Special Thanks #
I would like to thank to Simform Solutions for their contributions to the original package:
I would also like to thank the following people for their feedback and suggestions:
We are grateful for all of the contributions that have made this package possible.
Main Contributors #


Birju Vachhani
Devarsh Ranpara
Ankit Panchal
Kashifa Laliwala
Vatsal Tanna
Sanket Kachhela
Parth Baraiya
Shweta Chauhan
Mehul Kabaria
Dhaval Kansara
Happy Makadiya
Ujas Majithiya