357 lines
11 KiB
Dart
357 lines
11 KiB
Dart
import 'dart:io';
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import 'package:flutter/material.dart';
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import 'package:image_picker/image_picker.dart';
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import 'package:wechat_assets_picker/wechat_assets_picker.dart';
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import 'package:photo_manager/photo_manager.dart';
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import 'ItemWidgetFactory.dart';
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/// 媒体选择类型
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enum MediaType { image, video }
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/// 纵向滚动四列的媒体添加组件，支持拍摄、全屏相册多选，以及初始地址列表展示
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/// 使用示例：
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/// MediaPickerGrid(
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/// maxCount: 4,
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/// mediaType: MediaType.video,
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/// initialMediaPaths: ['https://...', '/local/path.png'],
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/// onChanged: (List<File> medias) {},
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/// onMediaAdded: (String path) {},
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/// onMediaRemoved: (String path) {},
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/// ),
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class MediaPickerRow extends StatefulWidget {
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final int maxCount;
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final MediaType mediaType;
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final List<String>? initialMediaPaths;
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final ValueChanged<List<File>> onChanged;
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final ValueChanged<String>? onMediaAdded;
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final ValueChanged<String>? onMediaRemoved;
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const MediaPickerRow({
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Key? key,
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this.maxCount = 4,
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this.mediaType = MediaType.image,
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this.initialMediaPaths,
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required this.onChanged,
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this.onMediaAdded,
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this.onMediaRemoved,
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}) : super(key: key);
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@override
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_MediaPickerGridState createState() => _MediaPickerGridState();
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}
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class _MediaPickerGridState extends State<MediaPickerRow> {
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final ImagePicker _picker = ImagePicker();
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late List<String> _mediaPaths;
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@override
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void initState() {
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super.initState();
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_mediaPaths = widget.initialMediaPaths != null
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? widget.initialMediaPaths!.take(widget.maxCount).toList()
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: [];
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WidgetsBinding.instance.addPostFrameCallback((_) {
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widget.onChanged(
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_mediaPaths.map((p) => p.startsWith('http') ? File('') : File(p)).toList(),
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);
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});
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}
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Future<void> _showPickerOptions() async {
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showModalBottomSheet(
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context: context,
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backgroundColor: Colors.white,
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builder: (_) => SafeArea(
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child: Wrap(
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children: [
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ListTile(
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titleAlignment: ListTileTitleAlignment.center,
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leading: Icon(
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widget.mediaType == MediaType.image
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? Icons.camera_alt
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: Icons.videocam,
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),
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title: Text(
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widget.mediaType == MediaType.image ? '拍照' : '拍摄视频',
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),
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onTap: () {
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Navigator.of(context).pop();
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_pickCamera();
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},
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),
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ListTile(
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titleAlignment: ListTileTitleAlignment.center,
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leading: Icon(
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widget.mediaType == MediaType.image
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? Icons.photo_library
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: Icons.video_library,
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),
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title: Text(
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widget.mediaType == MediaType.image
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? '从相册选择'
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: '从相册选择视频',
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),
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onTap: () {
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Navigator.of(context).pop();
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_pickGallery();
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},
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),
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ListTile(
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titleAlignment: ListTileTitleAlignment.center,
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leading: const Icon(Icons.close),
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title: const Text('取消'),
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onTap: () => Navigator.of(context).pop(),
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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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Future<void> _pickCamera() async {
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if (_mediaPaths.length >= widget.maxCount) return;
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try {
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XFile? picked;
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if (widget.mediaType == MediaType.image) {
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picked = await _picker.pickImage(source: ImageSource.camera);
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} else {
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picked = await _picker.pickVideo(source: ImageSource.camera);
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}
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if (picked != null) {
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final path = picked.path;
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setState(() => _mediaPaths.add(path));
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widget.onChanged(_mediaPaths.map((p) => File(p)).toList());
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widget.onMediaAdded?.call(path);
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}
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} catch (e) {
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debugPrint('拍摄失败: $e');
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}
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}
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Future<void> _pickGallery() async {
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if (_mediaPaths.length >= widget.maxCount) return;
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final permission = await PhotoManager.requestPermissionExtend();
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if (permission != PermissionState.authorized &&
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permission != PermissionState.limited) {
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(content: Text('请到设置中开启相册访问权限')),
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);
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return;
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}
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try {
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final remaining = widget.maxCount - _mediaPaths.length;
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final List<AssetEntity>? assets = await AssetPicker.pickAssets(
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context,
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pickerConfig: AssetPickerConfig(
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requestType: widget.mediaType == MediaType.image
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? RequestType.image
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: RequestType.video,
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maxAssets: remaining,
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gridCount: 4,
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),
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);
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if (assets != null) {
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for (final asset in assets) {
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if (_mediaPaths.length >= widget.maxCount) break;
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final file = await asset.file;
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if (file != null) {
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final path = file.path;
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_mediaPaths.add(path);
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widget.onMediaAdded?.call(path);
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}
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}
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setState(() {});
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widget.onChanged(_mediaPaths.map((p) => File(p)).toList());
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}
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} catch (e) {
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debugPrint('相册选择失败: $e');
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}
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}
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void _removeMedia(int index) {
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final removed = _mediaPaths[index];
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setState(() => _mediaPaths.removeAt(index));
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widget.onChanged(_mediaPaths.map((p) => File(p)).toList());
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widget.onMediaRemoved?.call(removed);
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}
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@override
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Widget build(BuildContext context) {
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return GridView.builder(
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shrinkWrap: true,
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physics: const NeverScrollableScrollPhysics(),
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gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
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crossAxisCount: 4,
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crossAxisSpacing: 8,
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mainAxisSpacing: 8,
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childAspectRatio: 1,
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mainAxisExtent: 80,
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),
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itemCount: _mediaPaths.length < widget.maxCount
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? _mediaPaths.length + 1
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: widget.maxCount,
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itemBuilder: (context, index) {
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if (index < _mediaPaths.length) {
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final path = _mediaPaths[index];
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final isNetwork = path.startsWith('http');
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return Stack(
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children: [
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ClipRRect(
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borderRadius: BorderRadius.circular(5),
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child: widget.mediaType == MediaType.image
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? (isNetwork
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? Image.network(path, fit: BoxFit.cover,width: 80, height: 80,)
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: Image.file(File(path), width: 80, height: 80, fit: BoxFit.cover))
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: Container(
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color: Colors.black12,
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child: const Center(
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child: Icon(
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Icons.videocam,
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color: Colors.white70,
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),
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),
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),
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),
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Positioned(
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top: -15,
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right: -15,
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child: IconButton(
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icon: const Icon(Icons.cancel, size: 20, color: Colors.red),
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onPressed: () => _removeMedia(index),
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),
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),
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],
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);
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} else {
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return GestureDetector(
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onTap: _showPickerOptions,
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child: Container(
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decoration: BoxDecoration(
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border: Border.all(color: Colors.black12),
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borderRadius: BorderRadius.circular(5),
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),
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child: const Center(
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child: Icon(Icons.camera_alt, color: Colors.black26),
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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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/// 照片上传区域组件，使用纵向四列Grid展示
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class RepairedPhotoSection extends StatefulWidget {
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final int maxCount;
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final MediaType mediaType;
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final String title;
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final List<String>? initialMediaPaths;
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final ValueChanged<List<File>> onChanged;
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final ValueChanged<String>? onMediaAdded;
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final ValueChanged<String>? onMediaRemoved;
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final VoidCallback onAiIdentify;
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final bool isShowAI;
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final double horizontalPadding;
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final bool isRequired;
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final bool isShowNum;
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const RepairedPhotoSection({
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Key? key,
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this.maxCount = 4,
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this.mediaType = MediaType.image,
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required this.title,
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this.initialMediaPaths,
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this.isShowAI = false,
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required this.onChanged,
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required this.onAiIdentify,
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this.horizontalPadding = 5,
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this.onMediaAdded,
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this.onMediaRemoved,
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this.isRequired = false,
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this.isShowNum = true,
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}) : super(key: key);
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@override
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_RepairedPhotoSectionState createState() => _RepairedPhotoSectionState();
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}
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class _RepairedPhotoSectionState extends State<RepairedPhotoSection> {
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late List<String> _mediaPaths;
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@override
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void initState() {
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super.initState();
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_mediaPaths = widget.initialMediaPaths?.take(widget.maxCount).toList() ?? [];
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WidgetsBinding.instance.addPostFrameCallback((_) {
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widget.onChanged(_mediaPaths.map((p) => File(p)).toList());
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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 Container(
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color: Colors.white,
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padding: const EdgeInsets.only(left: 0, right: 10),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Padding(
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padding: EdgeInsets.symmetric(horizontal: widget.horizontalPadding),
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child: ListItemFactory.createRowSpaceBetweenItem(
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leftText: widget.title,
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rightText: widget.isShowNum ? '${_mediaPaths.length}/${widget.maxCount}' : '',
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isRequired: widget.isRequired,
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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: EdgeInsets.symmetric(horizontal: widget.horizontalPadding),
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child: MediaPickerRow(
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maxCount: widget.maxCount,
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mediaType: widget.mediaType,
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initialMediaPaths: _mediaPaths,
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onChanged: (files) {
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final newPaths = files.map((f) => f.path).toList();
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setState(() {
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_mediaPaths = newPaths;
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});
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widget.onChanged(files);
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},
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onMediaAdded: widget.onMediaAdded,
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onMediaRemoved: widget.onMediaRemoved,
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),
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),
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const SizedBox(height: 20),
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if (widget.isShowAI)
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Padding(
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padding: EdgeInsets.symmetric(horizontal: widget.horizontalPadding),
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child: GestureDetector(
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onTap: widget.onAiIdentify,
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child: Container(
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padding: const EdgeInsets.symmetric(horizontal: 15),
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height: 36,
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decoration: BoxDecoration(
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color: const Color(0xFFDFEAFF),
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borderRadius: BorderRadius.circular(18),
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),
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child: Row(
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mainAxisSize: MainAxisSize.min,
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children: [
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Image.asset('assets/images/ai_img.png', width: 20),
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const SizedBox(width: 5),
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const Text('AI隐患识别与处理'),
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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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} |