108 lines
3.4 KiB
Dart
108 lines
3.4 KiB
Dart
// Copyright 2014 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'package:flutter/cupertino.dart';
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import 'package:flutter/material.dart';
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/// Flutter code sample for [CupertinoContextMenu].
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final DecorationTween _tween = DecorationTween(
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begin: BoxDecoration(
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color: CupertinoColors.systemPurple,
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boxShadow: const <BoxShadow>[],
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borderRadius: BorderRadius.circular(20.0),
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),
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end: BoxDecoration(
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color: CupertinoColors.systemPurple,
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boxShadow: CupertinoContextMenu.kEndBoxShadow,
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borderRadius: BorderRadius.circular(20.0),
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),
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);
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class CupertinoContextMenuDemo extends StatelessWidget {
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const CupertinoContextMenuDemo({super.key});
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// Or just do this inline in the builder below?
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static Animation<Decoration> _boxDecorationAnimation(
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Animation<double> animation) {
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return _tween.animate(
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CurvedAnimation(
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parent: animation,
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curve: Interval(
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0.0,
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CupertinoContextMenu.animationOpensAt,
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),
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),
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);
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}
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@override
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Widget build(BuildContext context) {
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return CupertinoPageScaffold(
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navigationBar: const CupertinoNavigationBar(
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middle: Text('CupertinoContextMenu 案例'),
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),
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child: Center(
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child: SizedBox(
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width: 100,
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height: 100,
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child: CupertinoContextMenu.builder(
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actions: <Widget>[
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CupertinoContextMenuAction(
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onPressed: () {
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Navigator.pop(context);
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},
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isDefaultAction: true,
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trailingIcon: CupertinoIcons.doc_on_clipboard_fill,
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child: const Text('Copy'),
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),
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CupertinoContextMenuAction(
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onPressed: () {
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Navigator.pop(context);
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},
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trailingIcon: CupertinoIcons.share,
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child: const Text('Share'),
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),
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CupertinoContextMenuAction(
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onPressed: () {
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Navigator.pop(context);
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},
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trailingIcon: CupertinoIcons.heart,
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child: const Text('Favorite'),
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),
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CupertinoContextMenuAction(
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onPressed: () {
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Navigator.pop(context);
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},
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isDestructiveAction: true,
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trailingIcon: CupertinoIcons.delete,
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child: const Text('Delete'),
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),
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],
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builder: (BuildContext context, Animation<double> animation) {
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final Animation<Decoration> boxDecorationAnimation =
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_boxDecorationAnimation(animation);
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return Container(
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decoration:
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animation.value < CupertinoContextMenu.animationOpensAt
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? boxDecorationAnimation.value
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: null,
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child: Container(
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padding: EdgeInsets.all(20),
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decoration: BoxDecoration(
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color: CupertinoColors.systemPurple,
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borderRadius: BorderRadius.circular(20.0),
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),
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child: const FlutterLogo(size: 250.0),
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),
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);
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},
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),
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),
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),
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);
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}
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}
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