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samples/experimental/context_menus/lib/custom_menu_page.dart

97 lines
2.4 KiB

import 'package:flutter/material.dart';
import 'package:url_launcher/url_launcher.dart';
import 'constants.dart';
import 'platform_selector.dart';
class CustomMenuPage extends StatelessWidget {
CustomMenuPage({
super.key,
required this.onChangedPlatform,
});
static const String route = 'custom-menu';
static const String title = 'Custom Menu';
static const String subtitle =
'A custom menu built from scratch, but using the default buttons.';
final PlatformCallback onChangedPlatform;
final TextEditingController _controller = TextEditingController(
text: 'Show the menu to see a custom menu with the default buttons.',
);
static const String url = '$kCodeUrl/custom_menu_page.dart';
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text(CustomMenuPage.title),
actions: <Widget>[
PlatformSelector(
onChangedPlatform: onChangedPlatform,
),
IconButton(
icon: const Icon(Icons.code),
onPressed: () async {
if (!await launchUrl(Uri.parse(url))) {
throw 'Could not launch $url';
}
},
),
],
),
body: Center(
child: SizedBox(
width: 300.0,
child: TextField(
controller: _controller,
maxLines: 4,
minLines: 2,
contextMenuBuilder: (context, editableTextState) {
return _MyContextMenu(
anchor: editableTextState.contextMenuAnchors.primaryAnchor,
children: AdaptiveTextSelectionToolbar.getAdaptiveButtons(
context,
editableTextState.contextMenuButtonItems,
).toList(),
);
},
),
),
),
);
}
}
class _MyContextMenu extends StatelessWidget {
const _MyContextMenu({
required this.anchor,
required this.children,
});
final Offset anchor;
final List<Widget> children;
@override
Widget build(BuildContext context) {
return Stack(
children: <Widget>[
Positioned(
top: anchor.dy,
left: anchor.dx,
child: Container(
width: 200.0,
height: 200.0,
color: Colors.amberAccent,
child: Column(
children: children,
),
),
),
],
);
}
}