form_builder_file_picker 4.1.0

FilePicker Field for flutter_form_builder package. Used to select files as part of form input.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:flutter_form_builder/flutter_form_builder.dart';
import 'package:form_builder_file_picker/form_builder_file_picker.dart';

void main() => runApp(const MyApp());

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(primarySwatch: Colors.blue),
      home: const MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key}) : super(key: key);

  @override
  MyHomePageState createState() => MyHomePageState();
}

class MyHomePageState extends State<MyHomePage> {
  final _formKey = GlobalKey<FormBuilderState>();
  bool _useCustomFileViewer = true;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('FormBuilder FilePicker Example'),
      ),
      body: Padding(
        padding: const EdgeInsets.all(10),
        child: FormBuilder(
          key: _formKey,
          child: Column(
            children: <Widget>[
              FormBuilderFilePicker(
                name: 'images',
                decoration: const InputDecoration(labelText: 'Attachments'),
                maxFiles: null,
                allowMultiple: true,
                previewImages: true,
                onChanged: (val) => debugPrint(val.toString()),
                typeSelectors: const [
                  TypeSelector(
                    type: FileType.any,
                    selector: Row(
                      children: <Widget>[
                        Icon(Icons.file_upload),
                        Text('Upload'),
                      ],
                    ),
                  )
                ],
                customTypeViewerBuilder: (children) => Row(
                  mainAxisAlignment: MainAxisAlignment.end,
                  children: children,
                ),
                onFileLoading: (val) {
                  debugPrint(val.toString());
                },
                customFileViewerBuilder: _useCustomFileViewer
                    ? (files, filesSetter) =>
                        customFileViewerBuilder(files ?? [], (newValue) {})
                    : null,
              ),
              const SizedBox(height: 20),
              Row(
                mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                children: [
                  ElevatedButton(
                    child: const Text('Submit'),
                    onPressed: () {
                      _formKey.currentState!.save();
                      debugPrint(_formKey.currentState!.value.toString());
                    },
                  ),
                  const Spacer(),
                  ElevatedButton(
                    child: Text(_useCustomFileViewer
                        ? 'Use Default File Viewer'
                        : 'Use Custom File Viewer'),
                    onPressed: () {
                      setState(
                          () => _useCustomFileViewer = !_useCustomFileViewer);
                    },
                  ),
                  const Spacer(),
                  ElevatedButton(
                    child: const Text('Reset'),
                    onPressed: () {
                      setState(
                        () => _formKey.currentState!.reset(),
                      );
                    },
                  ),
                ],
              ),
            ],
          ),
        ),
      ),
    );
  }

  Widget customFileViewerBuilder(
    List<PlatformFile> files,
    FormFieldSetter<List<PlatformFile>> setter,
  ) {
    return files.isEmpty
        ? const Center(child: Text('No files'))
        : ListView.separated(
            shrinkWrap: true,
            itemBuilder: (context, index) {
              return ListTile(
                title: Text(files[index].name),
                trailing: IconButton(
                  icon: const Icon(Icons.delete),
                  onPressed: () {
                    files.removeAt(index);
                    setter.call([...files]);
                  },
                ),
              );
            },
            separatorBuilder: (context, index) =>
                const Divider(color: Colors.blueAccent),
            itemCount: files.length,
          );
  }
}