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),
body: center(
child: column(
mainAxisAlignment: MainAxisAlignment.center,
children: <widget>[
padding(
padding: const EdgeInsets.all(8),
child: ElevatedButton(
onPressed: () {
// close the screen and return "yep!" as the result.
navigator.pop(context, 'yep!');
},
child: const Text('Yep!'),
),
),
padding(
padding: const EdgeInsets.all(8),
child: ElevatedButton(
onPressed: () {
// close the screen and return "nope." as the result.
navigator.pop(context, 'nope.');
},
child: const Text('Nope.'),
),
)
],
),
),
);
}
}
<code_end>
<topic_end>
<topic_start>
add a drawer to a screen
in apps that use material design,
there are two primary options for navigation: tabs and drawers.
when there is insufficient space to support tabs,
drawers provide a handy alternative.
in flutter, use the drawer widget in combination with a
scaffold to create a layout with a material design drawer.
this recipe uses the following steps:
<topic_end>
<topic_start>
1. create a scaffold
to add a drawer to the app, wrap it in a scaffold widget.
the scaffold widget provides a consistent visual structure to apps that
follow the material design guidelines.
it also supports special material design
components, such as drawers, AppBars, and SnackBars.
in this example, create a scaffold with a drawer:
<code_start>
scaffold(
appBar: AppBar(
title: const Text('AppBar without hamburger button'),
),
drawer: // add a drawer here in the next step.
);
<code_end>
<topic_end>
<topic_start>
2. add a drawer
now add a drawer to the scaffold. a drawer can be any widget,
but it’s often best to use the drawer widget from the
material library,
which adheres to the material design spec.
<code_start>
scaffold(
appBar: AppBar(
title: const Text('AppBar with hamburger button'),
),
drawer: drawer(
child: // populate the drawer in the next step.
),
);
<code_end>
<topic_end>
<topic_start>
3. populate the drawer with items
now that you have a drawer in place, add content to it.
for this example, use a ListView.
while you could use a column widget,
ListView is handy because it allows users to scroll
through the drawer if the
content takes more space than the screen supports.
populate the ListView with a DrawerHeader
and two ListTile widgets.
for more information on working with lists,
see the list recipes.
<code_start>
drawer(
// add a ListView to the drawer. this ensures the user can scroll
// through the options in the drawer if there isn't enough vertical
// space to fit everything.
child: ListView(
// important: remove any padding from the ListView.
padding: EdgeInsets.zero,
children: [
const DrawerHeader(
decoration: BoxDecoration(