Flutter Bottomsheet Modal not rerendering

Question

On my grid items when I click, it opens a ModalBottomSheet and listed with filter chips of strings. When you click a filter chip value, the value is updated but the widget does not re-render. The app is a StatefulWidget.

I have called the function setState.

What I expect is filterchips becomes checked and unchecked on selection.

void _showBottom(index){
    showModalBottomSheet<void>(
        context: context,

        builder: (BuildContext context){
          return new Container(
            padding: new EdgeInsets.all(27.0),
            child: new Column(
              children: <Widget>[                
                new Text('Some headline', style: new TextStyle(  fontWeight: FontWeight.bold, fontSize: 22),),
                getFilterChipsWidgets(index),
              ],
            ),
          );
        }
    );
  }


Widget getFilterChipsWidgets(index)
  {
    List<Widget> tags_list = new List<Widget>();
      for(var i=0; i<list[index]["tags"].length; i++) {       
        var _isSelected = true;

        FilterChip item = new FilterChip(
          label: Text("Filtertext",), 
          selected: _isSelected,
          onSelected: (bool newValue) {            
            setState(() {
              _isSelected = !_isSelected;
              debugPrint(_isSelected.toString());
            });
          },
        );
        tags_list.add(item);       
      }
      return new Row(children: tags_list);
   }

Answer 1

You need to add height for the root node of the bottom sheet. So change your container to have a fixed height.

 Container(
     height: 300.0, // Add height
     padding: new EdgeInsets.all(27.0),
     child: new Column(
       children: <Widget>[                
          new Text('Some headline', 
               style: new TextStyle(fontWeight: FontWeight.bold, fontSize: 22),),
                getFilterChipsWidgets(index),
              ],
            ),

I usually calculate this dynamically based on the widgets I'm passing in. But this should get you started.

Edit

The comment I gave below was the actual answer.

You should wrap all the widgets in the bottom sheet into it's own stateful widget and set your values in there.