Convex Bottom Bar In Flutter :
dependencies:
convex_bottom_bar:
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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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