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implemented item selection + button to print a list of issues/news etc(Button has no functionality yet).

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Nizz05
2023-05-13 19:39:10 +02:00
parent 5d1c30ce9f
commit 5687670e36
2 changed files with 191 additions and 75 deletions
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lib/UserDefinedList.dart
+190 -75
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@@ -3,14 +3,19 @@ import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:firebase_storage/firebase_storage.dart'; import 'package:firebase_storage/firebase_storage.dart';
import 'package:flutter/foundation.dart'; import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart'; import 'package:flutter/material.dart';
import 'package:printing/printing.dart';
import 'DetailPage.dart'; import 'DetailPage.dart';
import 'package:intl/intl.dart'; import 'package:intl/intl.dart';
import 'package:pdf/widgets.dart' as pdfWidgets;
import 'package:http/http.dart' as http;
class UserDefinedItem extends StatelessWidget { class UserDefinedItem extends StatelessWidget {
final String title; final String title;
final String datum; final String datum;
final String description; final String description;
final String imageUrl; final String imageUrl;
final Function onLongPress;
final bool isSelected;
const UserDefinedItem({ const UserDefinedItem({
Key? key, Key? key,
@@ -18,43 +23,62 @@ class UserDefinedItem extends StatelessWidget {
required this.description, required this.description,
required this.datum, required this.datum,
required this.imageUrl, required this.imageUrl,
required this.onLongPress,
required this.isSelected,
}) : super(key: key); }) : super(key: key);
@override @override
Widget build(BuildContext context) { Widget build(BuildContext context) {
return Card( return InkWell(
child: InkWell( onTap: () {
onTap: () { // Open a new screen when the user taps on the list item
// Open a new screen when the user taps on the list item Navigator.push(
Navigator.push( context,
context, MaterialPageRoute(
MaterialPageRoute( builder: (context) => DetailPage(
builder: (context) => DetailPage( title: title,
title: title, datum: datum,
datum: datum, description: description,
description: description, imageUrl: imageUrl,
imageUrl: imageUrl,
),
), ),
); ),
}, );
},
onLongPress: onLongPress as void Function()?,
child: Card(
child: Row( child: Row(
crossAxisAlignment: CrossAxisAlignment.start, crossAxisAlignment: CrossAxisAlignment.start,
children: [ children: [
SizedBox( Stack(
width: 120, children: [
height: 120, SizedBox(
child: CachedNetworkImage( width: 120,
imageUrl: imageUrl, height: 120,
placeholder: (context, url) => const Center( child: CachedNetworkImage(
child: SizedBox( imageUrl: imageUrl,
width: 50, placeholder: (context, url) => const Center(
height: 50, child: SizedBox(
child: CircularProgressIndicator(), width: 50,
height: 50,
child: CircularProgressIndicator(),
),
),
errorWidget: (context, url, error) => const Icon(Icons.error),
), ),
), ),
errorWidget: (context, url, error) => const Icon(Icons.error), if (isSelected) // Wenn das Element ausgewählt ist, zeigen Sie die Checkbox an
), Positioned(
top: 0,
left: 0,
child: Checkbox(
value: isSelected,
onChanged: (bool? value) {
onLongPress(); // Wenn die Checkbox angeklickt wird, rufen Sie die onLongPress-Funktion auf
},
),
),
],
), ),
Flexible( Flexible(
flex: 1, flex: 1,
@@ -104,6 +128,8 @@ class UserDefinedItem extends StatelessWidget {
} }
} }
class GenericList extends StatefulWidget { class GenericList extends StatefulWidget {
final String collectionName; final String collectionName;
const GenericList({Key? key, required this.collectionName}) : super(key: key); const GenericList({Key? key, required this.collectionName}) : super(key: key);
@@ -114,6 +140,7 @@ class GenericList extends StatefulWidget {
class _GenericListState extends State<GenericList> { class _GenericListState extends State<GenericList> {
final FirebaseFirestore firestore = FirebaseFirestore.instance; final FirebaseFirestore firestore = FirebaseFirestore.instance;
Map<String, bool> selectedItems = {};
@override @override
void initState() { void initState() {
@@ -122,7 +149,7 @@ class _GenericListState extends State<GenericList> {
firestore.enablePersistence(); firestore.enablePersistence();
// Enable network // Enable network
firestore.settings = firestore.settings =
const Settings(cacheSizeBytes: Settings.CACHE_SIZE_UNLIMITED); const Settings(cacheSizeBytes: Settings.CACHE_SIZE_UNLIMITED);
} }
Stream<QuerySnapshot> getDocumentStream() { Stream<QuerySnapshot> getDocumentStream() {
@@ -139,7 +166,9 @@ class _GenericListState extends State<GenericList> {
await FirebaseStorage.instance.refFromURL(imageUrl).delete(); await FirebaseStorage.instance.refFromURL(imageUrl).delete();
} }
// Löschen Sie das Dokument von der Firestore-Kollektion // Löschen Sie das Dokument von der Firestore-Kollektion
await firestore.collection(widget.collectionName).doc(documentId).delete(); await firestore.collection(widget.collectionName)
.doc(documentId)
.delete();
} catch (e) { } catch (e) {
if (kDebugMode) { if (kDebugMode) {
print('Error deleting document: $e'); print('Error deleting document: $e');
@@ -149,53 +178,139 @@ class _GenericListState extends State<GenericList> {
@override @override
Widget build(BuildContext context) { Widget build(BuildContext context) {
return StreamBuilder<QuerySnapshot>( return Scaffold(
stream: getDocumentStream(), body: Stack(
builder: (BuildContext context, AsyncSnapshot<QuerySnapshot> snapshot) { children: [
if (snapshot.hasError) { StreamBuilder<QuerySnapshot>(
return Text('Error: ${snapshot.error}'); stream: getDocumentStream(),
} builder: (BuildContext context,
switch (snapshot.connectionState) { AsyncSnapshot<QuerySnapshot> snapshot) {
case ConnectionState.waiting: if (snapshot.hasError) {
return const Text('Loading...'); return Text('Error: ${snapshot.error}');
default: }
final List<QueryDocumentSnapshot> documents = snapshot.data!.docs; switch (snapshot.connectionState) {
return ListView.builder( case ConnectionState.waiting:
itemCount: documents.length, return const Text('Loading...');
itemBuilder: (BuildContext context, int index) { default:
final Map<String, dynamic> data = final List<QueryDocumentSnapshot> documents = snapshot.data!
documents[index].data()! as Map<String, dynamic>; .docs;
final String documentId = documents[index].id; return ListView.builder(
final DateTime createdDate = data['createdDate'].toDate(); itemCount: documents.length,
final formattedDate = itemBuilder: (BuildContext context, int index) {
DateFormat('dd.MM.yyyy').format(createdDate); final Map<String, dynamic> data =
return Dismissible( documents[index].data()! as Map<String, dynamic>;
key: UniqueKey(), final String documentId = documents[index].id;
direction: DismissDirection.endToStart, final DateTime createdDate = data['createdDate'].toDate();
onDismissed: (direction) { final formattedDate =
_deleteDocument(documentId, data['imageUrl']); DateFormat('dd.MM.yyyy').format(createdDate);
return Dismissible(
key: UniqueKey(),
direction: DismissDirection.endToStart,
onDismissed: (direction) {
_deleteDocument(documentId, data['imageUrl']);
},
background: Container(
color: Colors.red,
child: const Align(
alignment: Alignment.centerRight,
child: Padding(
padding: EdgeInsets.only(right: 16),
child: Icon(Icons.delete, color: Colors.white),
),
),
),
child: UserDefinedItem(
title: data['title'] ?? '',
datum: formattedDate,
description: data['description'] ?? '',
imageUrl: data['imageUrl'] ?? '',
isSelected: selectedItems.containsKey(documentId)
? selectedItems[documentId]!
: false,
onLongPress: () {
// Aktualisieren Sie den ausgewählten Zustand des Elements
setState(() {
selectedItems[documentId] =
!selectedItems.containsKey(documentId)
? true
: !selectedItems[documentId]!;
});
},
),
);
},
);
}
},
),
if (selectedItems.containsValue(true))
Align(
alignment: Alignment.bottomLeft,
child: Padding(
padding: const EdgeInsets.all(16.0),
child: FloatingActionButton(
onPressed: () {
// Führen Sie hier die gewünschte Aktion aus
}, },
background: Container( backgroundColor: Colors.red,
color: Colors.red, child: const Icon(Icons.picture_as_pdf),
child: const Align( ),
alignment: Alignment.centerRight, ),
child: Padding( ),
padding: EdgeInsets.only(right: 16), ],
child: Icon(Icons.delete, color: Colors.white), ),
),
),
),
child: UserDefinedItem(
title: data['title'] ?? '',
datum: formattedDate,
description: data['description'] ?? '',
imageUrl: data['imageUrl'] ?? '',
),
);
},
);
}
},
); );
} }
/*
Future<pdfWidgets.ImageProvider> _loadNetworkImage(String url) async {
final response = await http.get(Uri.parse(url));
if (response.statusCode != 200) {
throw Exception('Failed to load network image.');
}
final Uint8List bytes = response.bodyBytes;
final imageProvider = pdfWidgets.MemoryImage(bytes);
return imageProvider;
}
Future<void> _printPdf() async {
final pdf = pdfWidgets.Document();
for (var docId in selectedItems.keys) {
final title = selectedItems[docId]!['title'];
final datum = selectedItems[docId]!['datum'];
final description = selectedItems[docId]!['description'];
final imageUrl = selectedItems[docId]!['imageUrl'];
final image = await _loadNetworkImage(imageUrl);
pdf.addPage(
pdfWidgets.MultiPage(
build: (context) => [
pdfWidgets.Center(
child: pdfWidgets.SizedBox(
width: double.infinity,
child: pdfWidgets.AspectRatio(
aspectRatio: 1,
child: pdfWidgets.Image(image),
),
),
),
pdfWidgets.Text(
title,
style: pdfWidgets.TextStyle(
fontSize: 20,
fontWeight: pdfWidgets.FontWeight.bold
)
),
pdfWidgets.Text(datum, style: const pdfWidgets.TextStyle(fontSize: 14, )),
pdfWidgets.Paragraph(text: description, style: const pdfWidgets.TextStyle(fontSize: 12)),
],
),
);
}
await Printing.sharePdf(bytes: await pdf.save(), filename: 'selectedItems.pdf');
}*/
} }
lib/home.dart
+1
View File
@@ -30,6 +30,7 @@ class _MyHomePageState extends State<MyHomePage> {
}); });
} }
@override @override
Widget build(BuildContext context) { Widget build(BuildContext context) {
final List<Widget> widgetOptions = <Widget>[ final List<Widget> widgetOptions = <Widget>[