347 lines
10 KiB
Dart
347 lines
10 KiB
Dart
import 'dart:typed_data';
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import 'dart:ui' as ui;
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import 'package:flutter/material.dart';
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import 'package:flutter/rendering.dart';
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import 'package:image_gallery_saver/image_gallery_saver.dart';
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class DirectSaveDialog extends StatefulWidget {
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final GlobalKey previewKey; // 编辑器预览的key
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final GlobalKey pureImageKey; // 纯净图片的key
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final String fileName;
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const DirectSaveDialog({
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super.key,
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required this.previewKey,
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required this.pureImageKey,
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required this.fileName,
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});
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@override
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State<DirectSaveDialog> createState() => _DirectSaveDialogState();
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}
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class _DirectSaveDialogState extends State<DirectSaveDialog> {
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Uint8List? _previewImageBytes;
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bool _isCapturing = true;
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bool _isSaving = false;
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String? _errorMessage;
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@override
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void initState() {
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super.initState();
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_capturePreviewImage();
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}
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Future<void> _capturePreviewImage() async {
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try {
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setState(() {
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_isCapturing = true;
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_errorMessage = null;
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});
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// 直接从编辑器预览中捕获图片，不需要等待渲染
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final boundary =
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widget.previewKey.currentContext?.findRenderObject()
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as RenderRepaintBoundary?;
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if (boundary == null) {
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throw Exception('无法获取预览图片');
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}
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// 立即捕获，因为预览已经是渲染好的
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final image = await boundary.toImage(pixelRatio: 1.5); // 适中的分辨率用于预览
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final byteData = await image.toByteData(format: ui.ImageByteFormat.png);
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if (byteData == null) {
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throw Exception('无法生成预览图片');
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}
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setState(() {
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_previewImageBytes = byteData.buffer.asUint8List();
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_isCapturing = false;
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});
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} catch (e) {
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debugPrint('捕获预览失败: $e');
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setState(() {
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_isCapturing = false;
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_errorMessage = e.toString();
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});
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}
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}
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Future<void> _saveImage() async {
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setState(() {
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_isSaving = true;
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});
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try {
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// 使用纯净图片key进行高质量保存
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final boundary =
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widget.pureImageKey.currentContext?.findRenderObject()
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as RenderRepaintBoundary?;
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if (boundary == null) {
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throw Exception('无法获取保存图片');
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}
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// 直接捕获纯净图片
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final image = await boundary.toImage(pixelRatio: 3.0); // 高分辨率保存
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final byteData = await image.toByteData(format: ui.ImageByteFormat.png);
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if (byteData == null) {
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throw Exception('无法生成保存图片');
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}
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final pngBytes = byteData.buffer.asUint8List();
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// 直接保存字节数据到相册
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final result = await ImageGallerySaver.saveImage(
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pngBytes,
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name: widget.fileName,
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quality: 100,
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);
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final success = result['isSuccess'] == true;
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if (mounted) {
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Navigator.of(context).pop(); // 关闭对话框
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// 显示结果
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(
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content: Text(success ? '✅ 壁纸已保存到相册！' : '❌ 保存失败，请重试'),
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backgroundColor: success ? Colors.green : Colors.red,
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duration: const Duration(seconds: 3),
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),
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);
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}
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} catch (e) {
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debugPrint('保存失败: $e');
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setState(() {
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_isSaving = false;
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_errorMessage = '保存失败: $e';
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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 Dialog(
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backgroundColor: Colors.transparent,
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child: Container(
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width: MediaQuery.of(context).size.width * 0.9,
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height: MediaQuery.of(context).size.height * 0.8,
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decoration: BoxDecoration(
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color: Colors.grey[900],
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borderRadius: BorderRadius.circular(20),
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),
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child: Column(
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children: [
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// 标题栏
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Container(
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padding: const EdgeInsets.all(20),
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decoration: const BoxDecoration(
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gradient: LinearGradient(
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colors: [Colors.pinkAccent, Colors.purpleAccent],
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begin: Alignment.topLeft,
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end: Alignment.bottomRight,
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),
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borderRadius: BorderRadius.only(
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topLeft: Radius.circular(20),
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topRight: Radius.circular(20),
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),
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),
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child: Row(
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children: [
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const Icon(Icons.save_alt, color: Colors.white, size: 24),
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const SizedBox(width: 12),
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const Expanded(
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child: Text(
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'保存确认',
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style: TextStyle(
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color: Colors.white,
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fontSize: 20,
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fontWeight: FontWeight.bold,
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),
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),
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),
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IconButton(
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icon: const Icon(Icons.close, color: Colors.white),
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onPressed: () => Navigator.of(context).pop(),
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),
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],
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),
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),
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// 预览区域
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Expanded(
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child: Container(
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margin: const EdgeInsets.all(20),
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decoration: BoxDecoration(
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color: Colors.black,
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borderRadius: BorderRadius.circular(12),
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border: Border.all(color: Colors.grey[700]!, width: 2),
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),
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child: ClipRRect(
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borderRadius: BorderRadius.circular(10),
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child: _buildPreviewContent(),
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),
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),
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),
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// 按钮区域
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Container(
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padding: const EdgeInsets.all(20),
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child: _buildButtons(),
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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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Widget _buildPreviewContent() {
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if (_isCapturing) {
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return const Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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CircularProgressIndicator(color: Colors.pinkAccent, strokeWidth: 3),
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SizedBox(height: 16),
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Text(
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'正在获取预览...',
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style: TextStyle(color: Colors.white, fontSize: 16),
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),
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],
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),
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);
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}
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if (_errorMessage != null) {
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return Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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const Icon(Icons.error_outline, color: Colors.red, size: 48),
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const SizedBox(height: 16),
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const Text(
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'获取预览失败',
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style: TextStyle(
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color: Colors.white,
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fontSize: 18,
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fontWeight: FontWeight.bold,
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),
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),
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const SizedBox(height: 8),
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Padding(
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padding: const EdgeInsets.symmetric(horizontal: 20),
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child: Text(
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_errorMessage!,
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style: TextStyle(color: Colors.grey[400], fontSize: 14),
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textAlign: TextAlign.center,
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),
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),
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const SizedBox(height: 20),
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ElevatedButton(
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onPressed: _capturePreviewImage,
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style: ElevatedButton.styleFrom(
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backgroundColor: Colors.pinkAccent,
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foregroundColor: Colors.white,
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),
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child: const Text('重新获取'),
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),
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],
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),
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);
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}
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if (_previewImageBytes != null) {
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return Stack(
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fit: StackFit.expand,
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children: [
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Image.memory(_previewImageBytes!, fit: BoxFit.contain),
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if (_isSaving)
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Container(
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color: Colors.black.withValues(alpha: 0.7),
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child: const Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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CircularProgressIndicator(
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color: Colors.pinkAccent,
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strokeWidth: 3,
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),
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SizedBox(height: 16),
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Text(
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'正在保存到相册...',
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style: TextStyle(color: Colors.white, fontSize: 16),
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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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return const SizedBox.shrink();
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}
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Widget _buildButtons() {
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if (_errorMessage != null) {
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return Row(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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TextButton(
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onPressed: () => Navigator.of(context).pop(),
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child: const Text('取消', style: TextStyle(color: Colors.grey)),
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),
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],
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);
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}
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if (_previewImageBytes == null) {
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return const SizedBox.shrink();
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}
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return Row(
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children: [
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Expanded(
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child: TextButton(
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onPressed: _isSaving ? null : () => Navigator.of(context).pop(),
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child: const Text('取消', style: TextStyle(color: Colors.grey)),
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),
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),
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const SizedBox(width: 16),
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Expanded(
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flex: 2,
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child: ElevatedButton(
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onPressed: _isSaving ? null : _saveImage,
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style: ElevatedButton.styleFrom(
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backgroundColor: Colors.pinkAccent,
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foregroundColor: Colors.white,
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padding: const EdgeInsets.symmetric(vertical: 16),
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(12),
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),
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),
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child: _isSaving
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? const SizedBox(
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width: 20,
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height: 20,
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child: CircularProgressIndicator(
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color: Colors.white,
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strokeWidth: 2,
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),
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)
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: const Text(
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'保存到相册',
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style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
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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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