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samples/experimental/context_menus/lib/modified_action_page.dart

99 lines
3.2 KiB

import 'package:flutter/material.dart';
import 'package:url_launcher/url_launcher.dart';
import 'constants.dart';
import 'platform_selector.dart';
class ModifiedActionPage extends StatelessWidget {
ModifiedActionPage({
Key? key,
required this.onChangedPlatform,
}) : super(key: key);
static const String route = 'modified-action';
static const String title = 'Modified Action';
static const String subtitle =
'The copy button copies but also shows a menu.';
static const String url = '$kCodeUrl/modified_action_page.dart';
final PlatformCallback onChangedPlatform;
final TextEditingController _controller = TextEditingController(
text: 'Try using the copy button.',
);
DialogRoute _showDialog(BuildContext context) {
return DialogRoute<void>(
context: context,
builder: (BuildContext context) => const AlertDialog(
title: Text('Copied, but also showed this dialog.')),
);
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text(ModifiedActionPage.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.center,
children: <Widget>[
const Text(
'This example shows adding to the behavior of a default button.',
),
const SizedBox(
height: 30.0,
),
TextField(
controller: _controller,
contextMenuBuilder: (BuildContext context,
EditableTextState editableTextState) {
final List<ContextMenuButtonItem> buttonItems =
editableTextState.contextMenuButtonItems;
// Modify the copy buttonItem to show a dialog after copying.
final int copyButtonIndex = buttonItems.indexWhere(
(ContextMenuButtonItem buttonItem) {
return buttonItem.type == ContextMenuButtonType.copy;
},
);
if (copyButtonIndex >= 0) {
final ContextMenuButtonItem copyButtonItem =
buttonItems[copyButtonIndex];
buttonItems[copyButtonIndex] = copyButtonItem.copyWith(
onPressed: () {
copyButtonItem.onPressed();
Navigator.of(context).push(_showDialog(context));
},
);
}
return AdaptiveTextSelectionToolbar.buttonItems(
anchors: editableTextState.contextMenuAnchors,
buttonItems: buttonItems,
);
},
),
],
),
),
),
);
}
}