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Add a menu example to show menu system (#1578)

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pull/1588/head
Qun Cheng 2 years ago committed by GitHub
parent 4ab7f6c36b
commit 3bc6ad8110
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1 changed files with 210 additions and 100 deletions
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154
experimental/material_3_demo/lib/component_screen.dart
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@ -179,14 +179,11 @@ class _ButtonsState extends State<Buttons> {
'Use ElevatedButton, FilledButton, FilledButton.tonal, OutlinedButton, or TextButton',
child: SingleChildScrollView(
scrollDirection: Axis.horizontal,
padding: const EdgeInsets.symmetric(horizontal: tinySpacing),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: const <Widget>[
ButtonsWithoutIcon(isDisabled: false),
colDivider,
ButtonsWithIcon(),
colDivider,
ButtonsWithoutIcon(isDisabled: true),
],
),
@ -202,33 +199,39 @@ class ButtonsWithoutIcon extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Row(
return Padding(
padding: const EdgeInsets.symmetric(horizontal: 5.0),
child: IntrinsicWidth(
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
ElevatedButton(
onPressed: isDisabled ? null : () {},
child: const Text('Elevated'),
),
const SizedBox(width: tinySpacing),
colDivider,
FilledButton(
onPressed: isDisabled ? null : () {},
child: const Text('Filled'),
),
const SizedBox(width: tinySpacing),
colDivider,
FilledButton.tonal(
onPressed: isDisabled ? null : () {},
child: const Text('Filled tonal'),
),
const SizedBox(width: tinySpacing),
colDivider,
OutlinedButton(
onPressed: isDisabled ? null : () {},
child: const Text('Outlined'),
),
const SizedBox(width: tinySpacing),
colDivider,
TextButton(
onPressed: isDisabled ? null : () {},
child: const Text('Text'),
),
],
),
),
);
}
}
@ -238,38 +241,44 @@ class ButtonsWithIcon extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Row(
return Padding(
padding: const EdgeInsets.symmetric(horizontal: 10.0),
child: IntrinsicWidth(
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
ElevatedButton.icon(
onPressed: () {},
icon: const Icon(Icons.add),
label: const Text('Icon'),
),
const SizedBox(width: tinySpacing),
colDivider,
FilledButton.icon(
onPressed: () {},
label: const Text('Icon'),
icon: const Icon(Icons.add),
),
const SizedBox(width: tinySpacing),
colDivider,
FilledButton.tonalIcon(
onPressed: () {},
label: const Text('Icon'),
icon: const Icon(Icons.add),
),
const SizedBox(width: tinySpacing),
colDivider,
OutlinedButton.icon(
onPressed: () {},
icon: const Icon(Icons.add),
label: const Text('Icon'),
),
const SizedBox(width: tinySpacing),
colDivider,
TextButton.icon(
onPressed: () {},
icon: const Icon(Icons.add),
label: const Text('Icon'),
)
],
),
),
);
}
}
@ -1516,10 +1525,7 @@ class BottomAppBars extends StatelessWidget {
bottomNavigationBar: BottomAppBar(
child: Row(
children: <Widget>[
IconButton(
icon: const Icon(Icons.more_vert),
onPressed: () {},
),
const IconButtonAnchorExample(),
IconButton(
tooltip: 'Search',
icon: const Icon(Icons.search),
@ -1541,6 +1547,94 @@ class BottomAppBars extends StatelessWidget {
}
}
class IconButtonAnchorExample extends StatelessWidget {
const IconButtonAnchorExample({super.key});
@override
Widget build(BuildContext context) {
return MenuAnchor(
builder: (context, controller, child) {
return IconButton(
onPressed: () {
if (controller.isOpen) {
controller.close();
} else {
controller.open();
}
},
icon: const Icon(Icons.more_vert),
);
},
menuChildren: [
MenuItemButton(
child: const Text('Menu 1'),
onPressed: () {},
),
MenuItemButton(
child: const Text('Menu 2'),
onPressed: () {},
),
SubmenuButton(
menuChildren: <Widget>[
MenuItemButton(
onPressed: () {},
child: const Text('Menu 3.1'),
),
MenuItemButton(
onPressed: () {},
child: const Text('Menu 3.2'),
),
MenuItemButton(
onPressed: () {},
child: const Text('Menu 3.3'),
),
],
child: const Text('Menu 3'),
),
],
);
}
}
class ButtonAnchorExample extends StatelessWidget {
const ButtonAnchorExample({super.key});
@override
Widget build(BuildContext context) {
return MenuAnchor(
builder: (context, controller, child) {
return FilledButton.tonal(
onPressed: () {
if (controller.isOpen) {
controller.close();
} else {
controller.open();
}
},
child: const Text('Show menu'),
);
},
menuChildren: [
MenuItemButton(
leadingIcon: const Icon(Icons.people_alt_outlined),
child: const Text('Item 1'),
onPressed: () {},
),
MenuItemButton(
leadingIcon: const Icon(Icons.remove_red_eye_outlined),
child: const Text('Item 2'),
onPressed: () {},
),
MenuItemButton(
leadingIcon: const Icon(Icons.refresh),
onPressed: () {},
child: const Text('Item 3'),
),
],
);
}
}
class NavigationDrawers extends StatelessWidget {
const NavigationDrawers({super.key, required this.scaffoldKey});
final GlobalKey<ScaffoldState> scaffoldKey;
@ -1727,9 +1821,23 @@ class _DropdownMenusState extends State<DropdownMenus> {
}
return ComponentDecoration(
label: 'Dropdown menus',
tooltipMessage: 'Use DropdownMenu<T>',
child: Wrap(
label: 'Menus',
tooltipMessage: 'Use DropdownMenu<T> or MenuAnchor',
child: Column(
mainAxisSize: MainAxisSize.min,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Row(
mainAxisSize: MainAxisSize.min,
mainAxisAlignment: MainAxisAlignment.start,
children: const <Widget>[
ButtonAnchorExample(),
rowDivider,
IconButtonAnchorExample(),
],
),
colDivider,
Wrap(
alignment: WrapAlignment.spaceAround,
runAlignment: WrapAlignment.start,
crossAxisAlignment: WrapCrossAlignment.center,
@ -1766,6 +1874,8 @@ class _DropdownMenusState extends State<DropdownMenus> {
)
],
),
],
),
);
}
}

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