title: Flutter: use slider with state management
body: <p>Does anybody have a code example where a slider is used with BloC state management? I really don't understand how I Update the state of the slider and change the textvalue</p>
  <p>Short e.g. of my problem:
  Normally I would do something like</p>
  <p>Text(number,...)
  Slider(vale: number.toDouble()
  onChanged: (...){setState(() {_smth=number;}</p>
  <p>But this is clearly not possible when I want to use bloc.
  So back to my question: How does this work. Maybe a example.
  Thank you &lt;3</p>