Convex Bottom Bar In Flutter

Convex Bottom Bar In Flutter :

dependencies:
convex_bottom_bar:

Screenshot 1:

Screenshot 2:

Screenshot 3:

color_item_view.dart

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

class ColorItemView extends StatelessWidget {
  final Color color;

  ColorItemView(this.color);

  @override
  Widget build(BuildContext context) {
    return Container(
      color: color,
      alignment: Alignment.center,
      child: Text(
        color.value.toRadixString(16).toUpperCase(),
        style: const TextStyle(color: Colors.white),
      ),
    );
  }
}

custom_appbar_sample.dart

import 'package:convex_bottom_bar/convex_bottom_bar.dart';
import 'package:flutter/material.dart';

import 'color_item_view.dart';

class CustomAppBarDemo extends StatefulWidget {
  @override
  State createState() {
    return _State();
  }
}

class _State extends State<CustomAppBarDemo> {
  List<TabItem> items = <TabItem>[
    TabItem(icon: Icons.home, title: 'Home'),
    TabItem(icon: Icons.map, title: 'Discovery'),
    TabItem(icon: Icons.message, title: 'Message'),
    TabItem(icon: Icons.people, title: 'Profile')
  ];

  static const paletteColors = [
    Color(0xFFf44336),
    Color(0xFFE91E63),
    Color(0xFF9C27B0),
    Color(0xFF673AB7),
    Color(0xFF3F51B5),
    Color(0xFF2196F3),
    Color(0xFF00BCD4),
    Color(0xFF009688),
    Color(0xFF4CAF50),
    Color(0xFF8BC34A),
    Color(0xFFCDDC39),
    Color(0xFFFFEB3B),
    Color(0xFFFFC107),
    Color(0xFFFF9800),
    Color(0xFFFF5722),
    Color(0xFF795548),
    Color(0xFF9E9E9E),
    Color(0xFF607D8B),
  ];
  Color _tabBackgroundColor = paletteColors[5];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Custom ConvexAppBar')),
      body: paletteBody(),
      bottomNavigationBar: ConvexAppBar.builder(
        count: items.length,
        backgroundColor: _tabBackgroundColor,
        tabBuilder: (BuildContext context, int index, bool active) {
          var navigationItem = items[index];
          var _color = active ? Colors.white : Colors.white60;
          var _icon = active
              ? navigationItem.activeIcon ?? navigationItem.icon
              : navigationItem.icon;
          return Container(
            color: Colors.transparent,
            padding: EdgeInsets.only(bottom: 2),
            child: Column(
              mainAxisAlignment: MainAxisAlignment.end,
              children: <Widget>[
                Icon(_icon, color: _color),
                Text(navigationItem.title, style: TextStyle(color: _color))
              ],
            ),
          );
        },
        actionBuilder: (BuildContext context, int index, bool active) {
          var _color = active ? Colors.white : Colors.white60;

          return Stack(
            alignment: Alignment.center,
            children: <Widget>[
              SizedBox(
                width: 60,
                height: 60,
                child: Container(
                  decoration:
                      BoxDecoration(shape: BoxShape.circle, color: _color),
                  child: Icon(
                    Icons.add,
                    size: 40,
                    color: _tabBackgroundColor,
                  ),
                ),
              )
            ],
          );
        },
      ),
    );
  }

  Container tabContent(TabItem data, Color color) {
    return Container(
        height: 50,
        padding: EdgeInsets.only(bottom: 2),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.end,
          children: <Widget>[
            Icon(data.icon, color: color),
            Text(data.title, style: TextStyle(color: color))
          ],
        ));
  }

  GridView paletteBody() {
    return GridView.count(
      crossAxisCount: 5,
      childAspectRatio: 1,
      mainAxisSpacing: 1,
      crossAxisSpacing: 1,
      children: paletteColors
          .map((c) => GestureDetector(
                child: ColorItemView(c),
                onTap: () => _onColorChanged(c),
              ))
          .toList(),
    );
  }

  void _onColorChanged(Color color) {
    setState(() {
      _tabBackgroundColor = color;
    });
  }
}

default_appbar_demo.dart

import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
import 'package:convex_bottom_bar/convex_bottom_bar.dart';

class DefaultAppBarDemo extends StatefulWidget {
  @override
  State createState() {
    return _State();
  }
}

class _State extends State<DefaultAppBarDemo> {
  int _selectedIndex = 0;
  static const INDEX_PUBLISH = 2;
  static const TAB_ITEMS = const <TabItem>[
    TabItem(icon: Icons.home, title: 'Home'),
    TabItem(icon: Icons.map, title: 'Discovery'),
    TabItem(icon: Icons.message, title: 'Message'),
    TabItem(icon: Icons.people, title: 'Profile')
  ];
  static const ACTIVE_COLOR = Colors.red;
  static const NORMAL_COLOR = Colors.black;

  @override
  Widget build(BuildContext context) {
    debugPrint('build');
    return Scaffold(
      appBar: AppBar(
        title: const Text('Default ConvexAppBar'),
      ),
      body: Center(
        child: Text('TAB $_selectedIndex', style: TextStyle(fontSize: 20)),
      ),
      bottomNavigationBar: ConvexAppBar(
        items: TAB_ITEMS,
        onTap: (int i) => setState(() {
          _selectedIndex = i;
        }),
        actionItem: const TabItem(icon: Icons.add, title: "Publish"),
        onTapActionButton: () => setState(() {
          _selectedIndex = -1;
        }),
      ),
    );
  }
}

main.dart

import 'package:flutter/material.dart';

import 'custom_appbar_sample.dart';
import 'default_appbar_demo.dart';

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

class MyApp extends StatefulWidget {
  @override
  State createState() => _State();
}

class _State extends State<MyApp> {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      initialRoute: "/",
      routes: {
        "/": (BuildContext context) => Home(),
        "/default": (BuildContext context) => DefaultAppBarDemo(),
        "/custom": (BuildContext context) => CustomAppBarDemo(),
      },
    );
  }
}

class Home extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('ConvexAppBar Example'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            FlatButton(
              child: Text('Default  ConvexAppBar',
                  style: TextStyle(fontSize: 20.0)),
              color: Colors.blue,
              textColor: Colors.white,
              disabledColor: Colors.grey,
              disabledTextColor: Colors.black,
              padding: EdgeInsets.all(8.0),
              splashColor: Colors.blueAccent,
              onPressed: () => Navigator.of(context).pushNamed('/default'),
            ),
            FlatButton(
              child:
                  Text('Custom ConvexAppBar', style: TextStyle(fontSize: 20.0)),
              color: Colors.blue,
              textColor: Colors.white,
              disabledColor: Colors.grey,
              disabledTextColor: Colors.black,
              padding: EdgeInsets.all(8.0),
              splashColor: Colors.blueAccent,
              onPressed: () => Navigator.of(context).pushNamed('/custom'),
            ),
          ],
        ),
      ),
    );
  }
}

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