CODEWITHSUNDEEP
flutterdartlistview
Máté Antal
Máté Antal

Reputation: 166

Flutter pass functions to items for list view builder

What I wanna do is that I have a ListView with icons and stuff, they are like little shortcuts for the most used functions in the app.

    List _shortcuts = [
    {
      'name': 'HORN',
      'icon': Icons.circle_outlined,
      'selection': false,
      'func': (String dummy) {
        // do something
        print('I did it!' + dummy);
      },
    },
  ].toList();

So my question is... is it possible to call each items unique function in the Listviews builder method?

Something like _shortcuts[i]['func']('wow') ?

Upvotes: 0

Views: 1200

Answers (3)

user14280337
user14280337

Reputation:

You should create a class that will be used in your _shortcuts list. See the example below:

// The ShortCut class.
class ShortCut {
  final String name;
  final IconData icon;
  final bool selection;
  final void Function(String) func;

  const ShortCut({
    required this.name,
    required this.icon,
    required this.selection,
    required this.func,
  });
}

This class can be used within a widget and the function can be accessed from within the builder method of the ListView widget as follows:


class App extends StatefulWidget {
  @override
  _AppState createState() => _AppState();
}

class _AppState extends State<App> {
  /// The is your list with custom shortcuts.
  final _shortCuts = <ShortCut>[
    ShortCut(
      name: 'HORN',
      icon: Icons.circle_outlined,
      selection: false,
      func: (String dummy) {
        // do something
        print('I did it!' + dummy);
      },
    ),
  ];

  @override
  Widget build(BuildContext context) {
    return ListView.builder(
      itemCount: _shortCuts.length,
      itemBuilder: (context, index) {
        final _shortCut = _shortCuts[index];

        // Call the function here.
        _shortCut.func('dummy');

        return Container();
      },
    );
  }
}

I hope that this is what you are looking for!

Upvotes: 1

Aashar Wahla
Aashar Wahla

Reputation: 3295

void main() {
  List<Map<String, dynamic>> _short = [
  {
     'name': 'HORN',
      'icon': "Icons.circle_outlined",
      'selection': false,
      'func': (String dummy) { 
       print('I did it! \t' + dummy);
      },
  }
];
  
_short[0]["func"]("hello");
    
}

Hopefully, this will be helpful to you.

Upvotes: 2

Emiliya
Emiliya

Reputation: 1

I think this should be done in php. Dart can't do that.

Upvotes: -1

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