draggable_bottom_sheet 0.1.2

This is a bottom sheet that is partially visible onto the screen and can be dragged from there into the screen to occupy the fullscreen.

example/main.dart

import 'dart:ui';
import 'package:flutter/material.dart';
import 'package:draggable_bottom_sheet/draggable_bottom_sheet.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home:
          DraggableBottomSheetExample(title: 'Draggable Bottom Sheet Example'),
      debugShowCheckedModeBanner: false,
    );
  }
}

class DraggableBottomSheetExample extends StatelessWidget {
  DraggableBottomSheetExample({Key key, this.title}) : super(key: key);
  final String title;

  @override
  Widget build(BuildContext context) {
    List<IconData> icons = [
      Icons.ac_unit,
      Icons.account_balance,
      Icons.adb,
      Icons.add_photo_alternate,
      Icons.format_line_spacing
    ];

    return Scaffold(
        body: DraggableBottomSheet(
      backgroundWidget: Scaffold(
        backgroundColor: Colors.white,
        appBar: AppBar(
          title: Text(title),
          backgroundColor: Colors.deepOrange,
        ),
        body: Container(
          height: 400,
          child: ListView.separated(
            scrollDirection: Axis.horizontal,
            padding: EdgeInsets.symmetric(vertical: 32),
            itemCount: icons.length,
            itemBuilder: (context, index) => Container(
              width: MediaQuery.of(context).size.width * 0.7,
              height: 200,
              decoration: BoxDecoration(
                  color: Colors.grey, borderRadius: BorderRadius.circular(20)),
              child: Icon(
                icons[index],
                color: Colors.white,
                size: 60,
              ),
            ),
            separatorBuilder: (context, index) => SizedBox(width: 10),
          ),
        ),
      ),
      previewChild: Container(
        padding: EdgeInsets.all(16),
        decoration: BoxDecoration(
            color: Colors.pink,
            borderRadius: BorderRadius.only(
                topLeft: Radius.circular(20), topRight: Radius.circular(20))),
        child: Column(
          children: <Widget>[
            Container(
              width: 40,
              height: 6,
              decoration: BoxDecoration(
                  color: Colors.white, borderRadius: BorderRadius.circular(10)),
            ),
            SizedBox(
              height: 8,
            ),
            Text(
              'Drag Me',
              style: TextStyle(
                  color: Colors.white,
                  fontSize: 16,
                  fontWeight: FontWeight.bold),
            ),
            SizedBox(
              height: 16,
            ),
            Row(
                mainAxisAlignment: MainAxisAlignment.center,
                children: icons.map((icon) {
                  return Container(
                    width: 50,
                    height: 50,
                    margin: EdgeInsets.only(right: 16),
                    child: Icon(
                      icon,
                      color: Colors.pink,
                      size: 40,
                    ),
                    decoration: BoxDecoration(
                        color: Colors.white,
                        borderRadius: BorderRadius.circular(10)),
                  );
                }).toList())
          ],
        ),
      ),
      expandedChild: Container(
        padding: EdgeInsets.all(16),
        decoration: BoxDecoration(
            color: Colors.pink,
            borderRadius: BorderRadius.only(
                topLeft: Radius.circular(20), topRight: Radius.circular(20))),
        child: Column(
          children: <Widget>[
            Icon(
              Icons.keyboard_arrow_down,
              size: 30,
              color: Colors.white,
            ),
            SizedBox(
              height: 8,
            ),
            Text(
              'Hey...I\'m expanding!!!',
              style: TextStyle(
                  color: Colors.white,
                  fontSize: 16,
                  fontWeight: FontWeight.bold),
            ),
            SizedBox(
              height: 16,
            ),
            Expanded(
              child: GridView.builder(
                  itemCount: icons.length,
                  gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
                    crossAxisCount: 2,
                    crossAxisSpacing: 10,
                    mainAxisSpacing: 10,
                  ),
                  itemBuilder: (context, index) => Container(
                        decoration: BoxDecoration(
                            color: Colors.white,
                            borderRadius: BorderRadius.circular(10)),
                        child: Icon(
                          icons[index],
                          color: Colors.pink,
                          size: 40,
                        ),
                      )),
            )
          ],
        ),
      ),
      minExtent: 150,
      maxExtent: MediaQuery.of(context).size.height * 0.8,
    ));
  }
}