130 lines
3.2 KiB
Dart
130 lines
3.2 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:pdfrx/pdfrx.dart';
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import '../../../data/models/file_model.dart';
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import '../../../services/file_service.dart';
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/// PDF预览页面
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class PdfPreviewPage extends StatefulWidget {
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final FileModel file;
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final String? entityId;
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const PdfPreviewPage({super.key, required this.file, this.entityId});
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@override
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State<PdfPreviewPage> createState() => _PdfPreviewPageState();
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}
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class _PdfPreviewPageState extends State<PdfPreviewPage> {
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String? _pdfUrl;
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bool _isLoading = true;
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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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_loadPdfUrl();
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}
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Future<void> _loadPdfUrl() async {
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try {
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final response = await FileService().getDownloadUrls(
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uris: [widget.file.relativePath],
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download: false,
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entity: widget.entityId,
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);
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final urls = response['urls'] as List<dynamic>? ?? [];
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if (urls.isNotEmpty) {
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final urlData = urls[0] as Map<String, dynamic>;
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final url = urlData['url'] as String;
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if (mounted) {
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setState(() {
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_pdfUrl = url;
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_isLoading = false;
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});
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}
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} else {
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if (mounted) {
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setState(() {
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_errorMessage = '无法获取PDF URL';
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_isLoading = false;
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});
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}
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}
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} catch (e) {
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if (mounted) {
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setState(() {
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_errorMessage = e.toString();
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_isLoading = false;
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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 Scaffold(
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appBar: AppBar(title: Text(widget.file.name)),
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body: _buildBody(),
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);
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}
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Widget _buildBody() {
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if (_isLoading) {
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return const Center(child: CircularProgressIndicator());
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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, size: 64, color: Colors.red),
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const SizedBox(height: 16),
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Text(
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_errorMessage!,
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textAlign: TextAlign.center,
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style: TextStyle(color: Colors.grey.shade600),
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),
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const SizedBox(height: 16),
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FilledButton(
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onPressed: () {
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setState(() {
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_isLoading = true;
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_errorMessage = null;
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});
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_loadPdfUrl();
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},
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child: const Text('重试'),
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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 (_pdfUrl == null) {
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return const Center(child: Text('无法加载PDF'));
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}
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return Container(
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color: Colors.grey.shade200,
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child: PdfViewer.uri(
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Uri.parse(_pdfUrl!),
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initialPageNumber: 1,
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params: const PdfViewerParams(
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activeMatchTextColor: Colors.yellow,
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annotationRenderingMode: PdfAnnotationRenderingMode.annotationAndForms,
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maxScale: 4.0,
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minScale: 0.8, // Allow 300% zoom
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scaleEnabled: true,
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textSelectionParams: PdfTextSelectionParams(
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enabled: true,
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showContextMenuAutomatically: true,
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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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