Nizz05/gemeindetrommler
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feat: PDF zoom & external link fix, admin contact messages inbox, and in-app user management
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Nizz05
2026-09-15 22:06:36 +02:00
parent 21f115499c
commit f27ad83908
10 changed files with 1736 additions and 66 deletions
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lib/screens/pdf_viewer_screen.dart
+259 -66
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@@ -1,10 +1,11 @@
import 'dart:typed_data';
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
import 'package:pdf/pdf.dart';
import 'package:printing/printing.dart';
import 'package:url_launcher/url_launcher.dart';
class PdfViewerScreen extends StatelessWidget {
class PdfViewerScreen extends StatefulWidget {
final String title;
final String pdfUrl;
@@ -14,77 +15,269 @@ class PdfViewerScreen extends StatelessWidget {
required this.pdfUrl,
});
@override
State<PdfViewerScreen> createState() => _PdfViewerScreenState();
}
class _PdfViewerScreenState extends State<PdfViewerScreen> {
final TransformationController _transformationController =
TransformationController();
double _zoomLevel = 1.0;
Uint8List? _cachedBytes;
@override
void dispose() {
_transformationController.dispose();
super.dispose();
}
void _zoomIn() {
setState(() {
_zoomLevel = (_zoomLevel * 1.3).clamp(0.8, 5.0);
_transformationController.value = Matrix4.identity()..scale(_zoomLevel);
});
}
void _zoomOut() {
setState(() {
_zoomLevel = (_zoomLevel / 1.3).clamp(0.8, 5.0);
_transformationController.value = Matrix4.identity()..scale(_zoomLevel);
});
}
void _resetZoom() {
setState(() {
_zoomLevel = 1.0;
_transformationController.value = Matrix4.identity();
});
}
Future<void> _openExternal() async {
final uri = Uri.parse(pdfUrl);
if (await canLaunchUrl(uri)) {
await launchUrl(uri, mode: LaunchMode.externalApplication);
final uri = Uri.parse(widget.pdfUrl);
try {
final launched = await launchUrl(
uri,
mode: LaunchMode.externalApplication,
);
if (!launched) {
await launchUrl(uri, mode: LaunchMode.platformDefault);
}
} catch (e) {
if (mounted) {
ScaffoldMessenger.of(context).showSnackBar(
SnackBar(
content: Text('Browser konnte nicht geöffnet werden: $e'),
backgroundColor: Colors.red,
),
);
}
}
}
Future<void> _sharePdf() async {
if (_cachedBytes != null) {
final safeTitle =
widget.title.replaceAll(RegExp(r'[\\/:*?<>|]'), '_');
await Printing.sharePdf(
bytes: _cachedBytes!,
filename: '$safeTitle.pdf',
);
} else {
ScaffoldMessenger.of(context).showSnackBar(
const SnackBar(content: Text('PDF wird noch geladen...')),
);
}
}
@override
Widget build(BuildContext context) {
final safeTitle = title.replaceAll(RegExp(r'[\\/:*?<>|]'), '_');
final safeTitle =
widget.title.replaceAll(RegExp(r'[\\/:*?<>|]'), '_');
return Scaffold(
appBar: AppBar(
title: Text(title, overflow: TextOverflow.ellipsis),
actions: [
IconButton(
icon: const Icon(Icons.open_in_browser),
tooltip: 'Im Browser öffnen',
onPressed: _openExternal,
),
],
),
body: PdfPreview(
build: (PdfPageFormat format) async {
final response = await http
.get(Uri.parse(pdfUrl))
.timeout(const Duration(seconds: 15));
if (response.statusCode == 200) {
return response.bodyBytes;
}
throw Exception('Fehler beim Abrufen der Datei (${response.statusCode})');
},
canChangeOrientation: false,
canChangePageFormat: false,
canDebug: false,
maxPageWidth: 700,
pdfFileName: '$safeTitle.pdf',
loadingWidget: const Center(
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
CircularProgressIndicator(),
SizedBox(height: 16),
Text('Aussendung wird geladen...'),
],
),
),
onError: (context, error) => Center(
child: Padding(
padding: const EdgeInsets.all(24.0),
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
const Icon(Icons.error_outline, color: Colors.red, size: 48),
const SizedBox(height: 12),
Text(
'Fehler beim Laden des Dokuments: $error',
textAlign: TextAlign.center,
style: const TextStyle(color: Colors.red),
return Scaffold(
appBar: AppBar(
title: Text(widget.title, overflow: TextOverflow.ellipsis),
actions: [
IconButton(
icon: const Icon(Icons.share),
tooltip: 'PDF teilen / drucken',
onPressed: _sharePdf,
),
IconButton(
icon: const Icon(Icons.open_in_browser),
tooltip: 'Im Browser öffnen',
onPressed: _openExternal,
),
],
),
body: Stack(
children: [
PdfPreview.builder(
build: (PdfPageFormat format) async {
if (_cachedBytes != null) return _cachedBytes!;
final response = await http
.get(Uri.parse(widget.pdfUrl))
.timeout(const Duration(seconds: 15));
if (response.statusCode == 200) {
_cachedBytes = response.bodyBytes;
return response.bodyBytes;
}
throw Exception(
'Fehler beim Abrufen der Datei (${response.statusCode})');
},
canChangeOrientation: false,
canChangePageFormat: false,
canDebug: false,
allowPrinting: false,
allowSharing: false,
useActions: false,
pdfFileName: '$safeTitle.pdf',
loadingWidget: const Center(
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
CircularProgressIndicator(),
SizedBox(height: 16),
Text('Aussendung wird geladen...'),
],
),
),
onError: (context, error) => Center(
child: Padding(
padding: const EdgeInsets.all(24.0),
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
const Icon(Icons.error_outline, color: Colors.red, size: 48),
const SizedBox(height: 12),
Text(
'Fehler beim Laden des Dokuments: $error',
textAlign: TextAlign.center,
style: const TextStyle(color: Colors.red),
),
const SizedBox(height: 16),
ElevatedButton.icon(
onPressed: _openExternal,
icon: const Icon(Icons.open_in_browser),
label: const Text('Direkt im Browser öffnen'),
),
],
),
const SizedBox(height: 16),
ElevatedButton.icon(
onPressed: _openExternal,
icon: const Icon(Icons.open_in_browser),
label: const Text('Direkt im Browser öffnen'),
),
],
),
),
),
),
);
}
),
),
pagesBuilder: (context, pages) {
return InteractiveViewer(
transformationController: _transformationController,
minScale: 0.8,
maxScale: 5.0,
panEnabled: true,
scaleEnabled: true,
onInteractionEnd: (details) {
final scale =
_transformationController.value.getMaxScaleOnAxis();
if (scale != _zoomLevel) {
setState(() {
_zoomLevel = scale;
});
}
},
child: SingleChildScrollView(
padding: const EdgeInsets.symmetric(
horizontal: 8.0, vertical: 16.0),
child: Center(
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
for (int i = 0; i < pages.length; i++) ...[
Container(
margin: const EdgeInsets.only(bottom: 16),
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.circular(4),
boxShadow: [
BoxShadow(
color: Colors.black.withOpacity(0.15),
blurRadius: 10,
offset: const Offset(0, 3),
),
],
),
child: Image(
image: pages[i].image,
fit: BoxFit.contain,
),
),
if (pages.length > 1)
Padding(
padding: const EdgeInsets.only(bottom: 12.0),
child: Text(
'Seite ${i + 1} von ${pages.length}',
style: TextStyle(
fontSize: 12,
fontWeight: FontWeight.w500,
color: Colors.grey.shade700,
),
),
),
],
],
),
),
),
);
},
),
// Floating Zoom Controls Overlay
Positioned(
right: 16,
bottom: 24,
child: Card(
elevation: 4,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(24)),
color: Colors.white.withOpacity(0.92),
child: Padding(
padding: const EdgeInsets.symmetric(vertical: 4, horizontal: 2),
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
IconButton(
icon: const Icon(Icons.zoom_in, color: Colors.black87),
tooltip: 'Vergrößern (+)',
onPressed: _zoomIn,
),
InkWell(
onTap: _resetZoom,
child: Padding(
padding: const EdgeInsets.symmetric(
vertical: 4, horizontal: 6),
child: Text(
'${(_zoomLevel * 100).round()}%',
style: const TextStyle(
fontSize: 11,
fontWeight: FontWeight.bold,
color: Colors.blue,
),
),
),
),
IconButton(
icon: const Icon(Icons.zoom_out, color: Colors.black87),
tooltip: 'Verkleinern (-)',
onPressed: _zoomOut,
),
IconButton(
icon: const Icon(Icons.restart_alt, size: 20, color: Colors.grey),
tooltip: 'Zoom zurücksetzen (1:1)',
onPressed: _resetZoom,
),
],
),
),
),
),
],
),
);
}
}