import 'package:flutter/material.dart'; /// Display an icon button with a badge /// /// Based from Medium article called "Notification Badge in Flutter" /// /// @author Pierre Hubert class IconButtonWithBadge extends StatelessWidget { final Widget icon; final void Function() onPressed; final int number; final bool active; const IconButtonWithBadge({ Key key, @required this.icon, @required this.onPressed, this.number = 0, this.active = false, }) : assert(icon != null), assert(number != null), assert(active != null), super(key: key); @override Widget build(BuildContext context) { return Container( color: active ? Color(0x55000000) : null, child: Stack( alignment: AlignmentDirectional.center, children: [ IconButton(icon: icon, onPressed: onPressed), number != 0 ? Positioned( right: 6, top: 6, child: Container( padding: EdgeInsets.all(2), decoration: BoxDecoration( color: Colors.red, borderRadius: BorderRadius.circular(6), ), constraints: BoxConstraints(minWidth: 14, minHeight: 14), child: Text( "$number", style: TextStyle(color: Colors.white, fontSize: 12), textAlign: TextAlign.center, ), )) : Container() ], ), ); } }