actions

actions

actions

MaterialApp({ title,theme, home: Scaffold({ appBar: AppBar({ title, backgroundColor, brightness. automaticallyImplyLeading, leading, actions, bottom,...}), body,}), })

açıklama

appBar sağında tıklanabilir widgetler grubu oluşturur. IconButtons, PopupMenuButton gibi…

konum

MaterialApp({ title,theme, home: Scaffold({ appBar: AppBar({ title, backgroundColor, brightness. automaticallyImplyLeading, leading, actions, bottom,...}), body,}), })

parametreler

appBar: AppBar({
 title:   Text()
 backgroundColor:   Colors.red    // appbar arkaplan rengini değiştitr
 brightness:   Brightness.dark   //  appbar karanlık mı parlak mı olacak.
 automaticallyImplyLeading:  true , // leading in otomatik oluşturulmasını konrol eder. false ise oluşturulmaz varsayaılanı true dir.
 leading:  Builder(builder: (BuildContext context) {
                          return IconButton( 
                                              icon: const Icon(Icons.menu), 
                                              onPressed: () { Scaffold.of(context).openDrawer(); }, 
                                              tooltip: MaterialLocalizations.of(context).openAppDrawerTooltip,
                                            );
                                          },
                                    ),   

                   //leading ataması yapılmamıssa flutter otomatik olarak oluşturur ve draver ile sekronize açalışır. safya gecisinde ise geri dugmesi olarak yerini alır.
                   //false  verilirse appar içinde geri widget gizlenir. 
                   //manuel ataması  widget oluşturucu olan Builder(builder: ) ile yapılır. sayfadaki draver ile senkronize çalışması için  sayafa context ine ihtiyac duyar.

 actions:   [  IconButton( icon: Icon(Icons.playlist_play),      tooltip: 'Buton tipi',  onPressed: _fonksiyonadi, ),
                   IconButton( icon: Icon(Icons.playlist_add),       tooltip: 'Buton tipi',  onPressed: _fonksiyonadi, ),
                   IconButton( icon: Icon(Icons.playlist_add_check), tooltip: 'Buton tipi',  onPressed: _fonksiyonadi, ),  
                ],
                        // appBar sağında tıklanabilir widgetler grubu oluşturur. IconButtons, PopupMenuButton gibi...
  bottom:  TabBar(
                                  controller: TabController({ initialIndex: 0, @required int length, @required TickerProvider vsync })  yada
                                                    DefaultTabController({ @required length,  initialIndex: 0, @required Widget child})

                                 tabs: [
                                              Tab(icon: Icon(Icons.directions_car)),
                                              Tab(icon: Icon(Icons.directions_transit)),
                                              Tab(icon: Icon(Icons.directions_bike)),
                                          ],
                           ),
})

örnek uygulama

actions-orn 
import 'package:flutter/material.dart';

class AppBarSample extends StatefulWidget {
  @override
  _AppBarSampleState createState() => _AppBarSampleState();
}

class _AppBarSampleState extends State<AppBarSample>
    with SingleTickerProviderStateMixin {
  TabController _tabController;

  @override
  void initState() {
    super.initState();
    _tabController = TabController(vsync: this, length: choices.length);
  }

  @override
  void dispose() {
    _tabController.dispose();
    super.dispose();
  }

  void _nextPage(int delta) {
    final int newIndex = _tabController.index + delta;
    if (newIndex < 0 || newIndex >= _tabController.length) return;
    _tabController.animateTo(newIndex);
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Android Monks'),
          leading: IconButton(
            tooltip: 'Previous choice',
            icon: const Icon(Icons.arrow_back),
            onPressed: () {
              _nextPage(-1);
            },
          ),
          actions: [
            IconButton(
              icon: const Icon(Icons.arrow_forward),
              tooltip: 'Next choice',
              onPressed: () {
                _nextPage(1);
              },
            ),
          ],
          bottom: PreferredSize(
            preferredSize: const Size.fromHeight(48.0),
            child: Theme(
              data: Theme.of(context).copyWith(accentColor: Colors.white),
              child: Container(
                height: 48.0,
                alignment: Alignment.center,
                child: TabPageSelector(controller: _tabController),
              ),
            ),
          ),
        ),
        body: TabBarView(
          controller: _tabController,
          children: choices.map((Choice choice) {
            return Padding(
              padding: const EdgeInsets.all(16.0),
              child: ChoiceCard(choice: choice),
            );
          }).toList(),
        ),
      ),
    );
  }
}

class Choice {
  const Choice({this.title, this.icon});

  final String title;
  final IconData icon;
}

const List choices = const [
  const Choice(title: 'CAR', icon: Icons.directions_car),
  const Choice(title: 'BICYCLE', icon: Icons.directions_bike),
  const Choice(title: 'BOAT', icon: Icons.directions_boat),
  const Choice(title: 'BUS', icon: Icons.directions_bus),
  const Choice(title: 'TRAIN', icon: Icons.directions_railway),
  const Choice(title: 'WALK', icon: Icons.directions_walk),
];

class ChoiceCard extends StatelessWidget {
  const ChoiceCard({Key key, this.choice}) : super(key: key);

  final Choice choice;

  @override
  Widget build(BuildContext context) {
    final TextStyle textStyle = Theme.of(context).textTheme.display1;
    return Card(
      color: Colors.white,
      child: Center(
        child: Column(
          mainAxisSize: MainAxisSize.min,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: [
            Icon(choice.icon, size: 128.0, color: textStyle.color),
            Text(choice.title, style: textStyle),
          ],
        ),
      ),
    );
  }
}

void main() {
  runApp(AppBarSample());
}
Tags:

Bir cevap yazın