animated_button_bar

AnimatedButtonBar is a flutter library that allows you to create a row of buttons with an animation on selection.

Getting started

Add this to your app's pubspec.yaml file:

dependencies:  
  animated_button_bar: ^0.0.2

Usage

Then you have to import the package with:

import 'package:animated_button_bar/animated_button_bar.dart';  

And use an AnimatedBarButton like this:

  Column(  
          mainAxisAlignment: MainAxisAlignment.center,  
          children: [  
            //inverted selection button bar  
            AnimatedButtonBar(  
              radius: 8.0,  
              padding: const EdgeInsets.all(16.0),  
              invertedSelection: true,  
              children: [  
                ButtonBarEntry(onTap: () => print('First item tapped'), child: Text('Day')),  
                ButtonBarEntry(onTap: () => print('Second item tapped'), child: Text('Week')),  
                ButtonBarEntry(onTap: () => print('Third item tapped'), child: Text('Month')),  
                ButtonBarEntry(onTap: () => print('Fourth item tapped'), child: Text('Year'))  
              ],  
            ),  
            //You can populate it with different types of widgets like Icon  
            AnimatedButtonBar(  
              radius: 32.0,  
              padding: const EdgeInsets.all(16.0),  
              backgroundColor: Colors.blueGrey.shade800,  
              foregroundColor: Colors.blueGrey.shade300,  
              elevation: 24,  
              borderColor: Colors.white,  
              borderWidth: 2,  
              innerVerticalPadding: 16,  
              children: [  
                ButtonBarEntry(onTap: () => print('First item tapped'), child: Icon(Icons.person)),  
                ButtonBarEntry(onTap: () => print('Second item tapped'), child: Icon(Icons.people)),  
              ],  
            ),  
          ],  
        ),  

Result

parameters

parameter	description	default
animationDuration	animation duration when tap	const Duration(milliseconds: 200)
backgroundColor	main color of the widget	Theme.of(context).backgroundColor
borderColor	color of the border	null
borderWidth	width of the border	borderColor != null ? 1.0 : 0.0;
children	A list of ButtonBarEntry to display	required
curve	the curve for the animation	Curves.fastOutSlowIn
elevation	double	0
foregroundColor	color for the selection	Theme.of(context).accentColor
invertedSelection	bool	false
radius	double	0.0
verticalPadding	double	8.0