title: How to create unselected indicator for tab bar in Flutter
body: <p>I created a custom indicator for tab bar using Decorator.
  I want to create a unselected indicator for not selected tabs in tab bar.</p>
  <p>I did a container with custom decoration but current selected indicator draws behind container decoration.</p>
  <pre><code>new TabBar( 
  labelColor: Colors.black,
  unselectedLabelColor: Colors.grey,
  indicator: new CustomTabIndicator(),
  tabs: [
  new Container(decoration: new CustomTabInactive(),child: Tab(icon: Icon(Icons.person )))])
  </code></pre>
  <p>tab bar with unselected indicator</p>
  <p><a href="https://i.stack.imgur.com/intIs.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/intIs.png" alt="tab bar with unselected indicator" /></a></p>