title: How to force an immediate redraw for a futurebuilder when state is changed?
body: <p>When I change the state upon which a specific futurebuilder widget relies, the widget is not redrawn until the async task completes. I want the widget to be redrawn immediately once the state changes. Below is the code for the futurebuilder:</p>
  
  <pre class="lang-dart prettyprint-override"><code>child: new FutureBuilder(
              future: _api.getListOfTourneys(searchTerm, filterChecks, pageNum),
              builder: (context, snapshot) {
                if (snapshot.hasData) {
                  if(!(snapshot.data is List)){
                    return new TourneyItem(snapshot.data['tournament']);
                  }
                  return new Expanded(
                      child: ListView.builder(
                    shrinkWrap: false,
                    scrollDirection: Axis.vertical,
                    itemCount: snapshot.data.length,
                    itemBuilder: (BuildContext context, int index) {
                      return TourneyItem(snapshot.data[index]);
                    },
                  ));
                } else if (snapshot.hasError) {
                  return new Text("No results found");
                } else {
                  return new CircularProgressIndicator();
                }
              },
            )
  </code></pre>