[Programmatically open drawer from scaffold directly] How to open scaffold's drawer with code #flutter #dart

widget.dart

class Widget extends StatelessWidget {
  final GlobalKey<ScaffoldState> _drawerKey = GlobalKey();

  void _openDrawer () {
    _drawerKey.currentState.openDrawer();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      key: _drawerKey,
      drawer: Drawer(),
      body: Center(
        child: RaisedButton(
          child: Text('Open Drawer'),
          onPressed: _openDrawer,
        ),
      ),
    );
  }
}

how to open it from a different class?

Hi, if you means a widget you can use:
Scaffold.of(context).openDrawer(). You obviously need the context.

From a random class, I'd recommend passing the GlobalKey()