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samples/experimental/context_menus/lib/default_values_page.dart

111 lines
3.4 KiB

import 'package:flutter/material.dart';
import 'package:url_launcher/url_launcher.dart';
import 'constants.dart';
import 'platform_selector.dart';
class DefaultValuesPage extends StatelessWidget {
DefaultValuesPage({
super.key,
required this.onChangedPlatform,
});
static const String route = 'default-values';
static const String title = 'Default API Values Example';
static const String subtitle =
'Shows what happens when you pass various things into contextMenuBuilder.';
final PlatformCallback onChangedPlatform;
final TextEditingController _controllerNone = TextEditingController(
text: "When contextMenuBuilder isn't given anything at all.",
);
final TextEditingController _controllerNull = TextEditingController(
text: "When contextMenuBuilder is explicitly given null.",
);
final TextEditingController _controllerCustom = TextEditingController(
text: "When something custom is passed to contextMenuBuilder.",
);
static const String url = '$kCodeUrl/default_values_page.dart';
DialogRoute _showDialog(BuildContext context, String message) {
return DialogRoute<void>(
context: context,
builder: (context) => AlertDialog(title: Text(message)),
);
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text(DefaultValuesPage.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: 400.0,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
const Text(
'This example simply shows what happens when contextMenuBuilder is given null, a custom value, or omitted altogether.',
),
const SizedBox(
height: 40.0,
),
TextField(
maxLines: 2,
minLines: 2,
controller: _controllerNone,
),
TextField(
maxLines: 2,
minLines: 2,
controller: _controllerNull,
contextMenuBuilder: null,
),
TextField(
maxLines: 2,
minLines: 2,
controller: _controllerCustom,
contextMenuBuilder: (context, editableTextState) {
return AdaptiveTextSelectionToolbar.buttonItems(
anchors: editableTextState.contextMenuAnchors,
buttonItems: <ContextMenuButtonItem>[
ContextMenuButtonItem(
label: 'Custom button',
onPressed: () {
ContextMenuController.removeAny();
Navigator.of(context).push(_showDialog(
context, 'You clicked the custom button.'));
},
),
...editableTextState.contextMenuButtonItems,
],
);
},
),
],
),
),
),
);
}
}