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samples/experimental/context_menus/lib/email_button_page.dart

96 lines
3.1 KiB

import 'package:flutter/material.dart';
import 'package:url_launcher/url_launcher.dart';
import 'constants.dart';
import 'is_valid_email.dart';
import 'platform_selector.dart';
class EmailButtonPage extends StatelessWidget {
EmailButtonPage({
Key? key,
required this.onChangedPlatform,
}) : super(key: key);
static const String route = 'email-button';
static const String title = 'Email Button';
static const String subtitle = 'A selection-aware email button';
static const String url = '$kCodeUrl/email_button_page.dart';
final PlatformCallback onChangedPlatform;
final TextEditingController _controller = TextEditingController(
text: 'Select the email address and open the menu: me@example.com',
);
DialogRoute _showDialog(BuildContext context) {
return DialogRoute<void>(
context: context,
builder: (BuildContext context) =>
const AlertDialog(title: Text('You clicked send email!')),
);
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text(EmailButtonPage.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: Column(
mainAxisAlignment: MainAxisAlignment.start,
children: <Widget>[
const SizedBox(height: 20.0),
const Text(
'This example shows how to add a special button to the context menu depending on the current selection.',
),
const SizedBox(height: 40.0),
TextField(
maxLines: 2,
controller: _controller,
contextMenuBuilder: (BuildContext context,
EditableTextState editableTextState) {
final TextEditingValue value =
editableTextState.textEditingValue;
final List<ContextMenuButtonItem> buttonItems =
editableTextState.contextMenuButtonItems;
if (isValidEmail(value.selection.textInside(value.text))) {
buttonItems.insert(
0,
ContextMenuButtonItem(
label: 'Send email',
onPressed: () {
ContextMenuController.removeAny();
Navigator.of(context).push(_showDialog(context));
},
));
}
return AdaptiveTextSelectionToolbar.buttonItems(
anchors: editableTextState.contextMenuAnchors,
buttonItems: buttonItems,
);
},
),
],
),
),
),
);
}
}