Scaffold(

   drawerEnableOpenDragGesture: false, // Prevent user sliding open

   appBar: AppBar(

      automaticallyImplyLeading: false,

      title: Text("Some Title"),

      actions: [

         Builder(builder: (context) => // Ensure Scaffold is in context

            IconButton(

               icon: Icon(Icons.settings),

               onPressed: () => Scaffold.of(context).openDrawer()

         )),

      ],

   ),

   // TODO ...

)