410 lines
12 KiB
Dart
410 lines
12 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:aesthetica_wallpaper/services/image_save_service.dart';
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class SavePreviewDialog extends StatefulWidget {
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final GlobalKey repaintBoundaryKey;
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final String fileName;
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const SavePreviewDialog({
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super.key,
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required this.repaintBoundaryKey,
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required this.fileName,
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});
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@override
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State<SavePreviewDialog> createState() => _SavePreviewDialogState();
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}
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class _SavePreviewDialogState extends State<SavePreviewDialog> {
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Uint8List? _previewImageBytes;
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bool _isRendering = 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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_renderPreview();
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}
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Future<void> _renderPreview() async {
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try {
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setState(() {
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_isRendering = true;
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_errorMessage = null;
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});
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// 使用更强的等待策略
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await Future.delayed(const Duration(milliseconds: 200));
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// 等待当前帧完成
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await WidgetsBinding.instance.endOfFrame;
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// 额外等待确保渲染完成
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await Future.delayed(const Duration(milliseconds: 1200)); // 增加到1.2秒
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// 获取 RepaintBoundary
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final boundary =
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widget.repaintBoundaryKey.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RepaintBoundary');
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}
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// 多次尝试等待绘制完成
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int waitAttempts = 0;
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const maxWaitAttempts = 15; // 增加尝试次数
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while (boundary.debugNeedsPaint && waitAttempts < maxWaitAttempts) {
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debugPrint('等待绘制完成... 尝试 ${waitAttempts + 1}/$maxWaitAttempts');
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await Future.delayed(
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Duration(milliseconds: 400 * (waitAttempts + 1)),
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); // 增加等待时间
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waitAttempts++;
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}
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// 如果仍在绘制，尝试强制刷新
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if (boundary.debugNeedsPaint) {
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debugPrint('强制刷新后再次尝试...');
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// 触发重绘
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WidgetsBinding.instance.addPostFrameCallback((_) {});
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await Future.delayed(const Duration(milliseconds: 800));
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// 最后一次检查
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if (boundary.debugNeedsPaint) {
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throw Exception('渲染超时，建议使用"直接保存"功能');
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}
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}
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// 捕获图片
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final image = await boundary.toImage(pixelRatio: 2.0);
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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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_isRendering = false;
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});
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} catch (e) {
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debugPrint('渲染预览失败: $e');
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setState(() {
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_isRendering = 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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if (_previewImageBytes == null) return;
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setState(() {
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_isSaving = true;
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});
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try {
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// 使用高分辨率重新捕获并保存
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final success = await ImageSaveService.saveImageToGallery(
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widget.repaintBoundaryKey,
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fileName: widget.fileName,
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);
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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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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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// 直接保存，跳过预览
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Future<void> _directSave() 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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// 直接使用原始保存服务
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final success = await ImageSaveService.saveImageToGallery(
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widget.repaintBoundaryKey,
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fileName: widget.fileName,
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);
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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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setState(() {
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_isSaving = false;
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_errorMessage = '直接保存失败: $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.preview, 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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'保存预览',
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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 (_isRendering) {
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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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'正在渲染预览...',
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style: TextStyle(color: Colors.white, fontSize: 16),
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),
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SizedBox(height: 8),
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Text(
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'复杂效果可能需要更长时间',
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style: TextStyle(color: Colors.grey, fontSize: 12),
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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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'渲染失败',
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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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Row(
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mainAxisAlignment: MainAxisAlignment.spaceEvenly,
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children: [
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ElevatedButton(
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onPressed: _renderPreview,
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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('重新渲染'),
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),
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ElevatedButton(
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onPressed: _directSave,
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style: ElevatedButton.styleFrom(
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backgroundColor: Colors.orange,
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foregroundColor: Colors.white,
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),
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child: const Text('直接保存'),
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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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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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