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Published
20 hours ago •
DavBfr
DavBfr
Receipt on POS Printers Not Taking Full Width
Describe the bug
- I have set up a custom page format using const PdfPageFormat(...), but the content does not extend to the full width.
- When "Fit to printable area" is selected, the content aligns center, and there is empty space at the top.
To Reproduce Code snippet to reproduce the behavior:
import 'package:pdf/pdf.dart';
import 'package:pdf/widgets.dart' as pw;
import 'package:printing/printing.dart';
import 'package:get/get.dart';
class PrintTest {
final PdfPageFormat pageFormat;
final double fontSize;
PrintTest({required this.pageFormat, required this.fontSize});
}
const double defaultFontSize = 5;
Future<void> printImgTest3() async {
List<String> toStringList = [
"PdfPageFormat.a3",
"PdfPageFormat.a4",
"PdfPageFormat.a5",
"PdfPageFormat.a6",
"PdfPageFormat.legal",
"PdfPageFormat.letter",
"PdfPageFormat.roll57",
"PdfPageFormat.roll80",
"PdfPageFormat.undefined",
"28 x 2",
];
Get.generalDialog<PrintTest>(
pageBuilder: (_, __, ___) {
TextEditingController widthController = TextEditingController();
TextEditingController heightController = TextEditingController();
TextEditingController marginController = TextEditingController(text: '2');
TextEditingController fontSizeController =
TextEditingController(text: '$defaultFontSize');
final GlobalKey<FormState> formKey = GlobalKey<FormState>();
return Align(
alignment: Alignment.center,
child: Container(
width: 400,
margin: const EdgeInsets.all(20),
padding: const EdgeInsets.all(20),
child: Material(
color: Colors.white,
child: SingleChildScrollView(
padding: const EdgeInsets.all(10),
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
const SizedBox(height: 15),
CustomTextFormFieldWithLabel(
labelText: 'Font size',
controller: fontSizeController,
hintText: 'Default Value: $defaultFontSize',
inputFormatterList: acceptDecimalValues(),
),
const SizedBox(height: 10),
Form(
key: formKey,
child: Column(
children: [
CustomTextFormFieldWithLabel(
labelText: 'Width',
controller: widthController,
inputFormatterList: acceptDecimalValues(),
),
CustomTextFormFieldWithLabel(
labelText: 'Height',
controller: heightController,
inputFormatterList: acceptDecimalValues(),
),
CustomTextFormFieldWithLabel(
labelText: 'Margin',
controller: marginController,
inputFormatterList: acceptDecimalValues(),
),
ElevatedButton(
onPressed: () {
if (formKey.currentState!.validate()) {
Get.back(
result: PrintTest(
pageFormat: PdfPageFormat(
double.parse(widthController.text) *
PdfPageFormat.mm,
double.parse(heightController.text) *
PdfPageFormat.mm,
marginAll:
double.parse(marginController.text) *
PdfPageFormat.mm,
),
fontSize: double.tryParse(
fontSizeController.text) ??
defaultFontSize,
),
);
}
},
child: const Text('Select Custom Format'),
)
],
),
),
const SizedBox(height: 10),
Wrap(
alignment: WrapAlignment.center,
children: <PdfPageFormat>[
PdfPageFormat.a3,
PdfPageFormat.a4,
PdfPageFormat.a5,
PdfPageFormat.a6,
PdfPageFormat.legal,
PdfPageFormat.letter,
PdfPageFormat.roll57,
PdfPageFormat.roll80,
PdfPageFormat.undefined,
const PdfPageFormat(
28 * PdfPageFormat.mm,
double.infinity,
marginAll: 2 * PdfPageFormat.mm,
),
]
.mapIndexed(
(e, i) => Padding(
padding: const EdgeInsets.all(5),
child: InkWell(
onTap: () {
Get.back(
result: PrintTest(
pageFormat: e,
fontSize: double.tryParse(
fontSizeController.text) ??
defaultFontSize,
),
);
},
child: Padding(
padding: const EdgeInsets.all(8.0),
child: Text(toStringList[i]),
),
),
),
)
.toList(),
),
],
),
),
),
),
);
},
barrierDismissible: true,
barrierLabel: 'test-print-3',
).then((PrintTest? value) async {
if (value == null) {
return;
}
final doc = pw.Document();
doc.addPage(
pw.Page(
pageFormat: value.pageFormat,
orientation: pw.PageOrientation.portrait,
build: (pw.Context context) {
return pw.Column(
crossAxisAlignment: pw.CrossAxisAlignment.center,
mainAxisSize: pw.MainAxisSize.min,
children: [
pw.FittedBox(
alignment: pw.Alignment.center,
fit: pw.BoxFit.scaleDown,
child: pw.Text(
'Business Name',
style: pw.TextStyle(
fontWeight: pw.FontWeight.bold,
fontSize: value.fontSize + 1,
),
),
),
pw.SizedBox(height: 1),
pw.FittedBox(
alignment: pw.Alignment.center,
fit: pw.BoxFit.scaleDown,
child: pw.Text(
'Transaction Id: 32',
style: pw.TextStyle(
fontWeight: pw.FontWeight.bold,
fontSize: value.fontSize,
),
),
),
pw.FittedBox(
alignment: pw.Alignment.center,
fit: pw.BoxFit.scaleDown,
child: pw.Text(
'Dec 2, 2034 1:08 AM',
style: pw.TextStyle(
fontWeight: pw.FontWeight.bold,
fontSize: value.fontSize,
),
),
),
pw.Row(
children: [
pw.Expanded(
flex: 3,
child: pw.SizedBox(
height: 10,
child: pw.FittedBox(
alignment: pw.Alignment.centerLeft,
fit: pw.BoxFit.scaleDown,
child: pw.Text(
'Product',
style: pw.TextStyle(
fontSize: value.fontSize,
fontWeight: pw.FontWeight.bold,
),
),
),
),
),
pw.Expanded(
flex: 1,
child: pw.SizedBox(
height: 8,
child: pw.FittedBox(
alignment: pw.Alignment.center,
fit: pw.BoxFit.scaleDown,
child: pw.Text(
'Qnty.',
style: pw.TextStyle(
fontWeight: pw.FontWeight.bold,
fontSize: value.fontSize,
),
),
),
),
),
pw.Expanded(
flex: 1,
child: pw.SizedBox(
height: 8,
child: pw.FittedBox(
alignment: pw.Alignment.center,
fit: pw.BoxFit.scaleDown,
child: pw.Text(
'Price',
style: pw.TextStyle(
fontWeight: pw.FontWeight.bold,
fontSize: value.fontSize,
),
),
),
),
),
],
),
...[
1,
2,
3,
4,
5,
].map(
(e) => pw.Row(
children: [
pw.Expanded(
flex: 3,
child: pw.Text(
'Product 1 jshkdh jhkash kafhjah fkahka ',
style: pw.TextStyle(
fontSize: value.fontSize - 1,
),
),
),
pw.Expanded(
flex: 1,
child: pw.SizedBox(
height: 7,
child: pw.FittedBox(
alignment: pw.Alignment.center,
fit: pw.BoxFit.scaleDown,
child: pw.Text(
'2',
style: pw.TextStyle(
fontSize: value.fontSize - 1,
),
),
),
),
),
pw.Expanded(
flex: 1,
child: pw.SizedBox(
height: 7,
child: pw.FittedBox(
alignment: pw.Alignment.center,
fit: pw.BoxFit.scaleDown,
child: pw.Text(
'Rs.34534',
style: pw.TextStyle(
fontSize: value.fontSize - 1,
),
),
),
),
),
],
),
),
],
);
},
),
);
await Printing.layoutPdf(
format: value.pageFormat,
onLayout: (PdfPageFormat ppf) => doc.save(),
);
});
}
[flutter](https://stackoverflow.com/questions/tagged/flutter)
Expected behavior
Screenshots
Flutter Doctor
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• Flutter version 3.16.0 on channel stable at /Users/muhammad/fvm/versions/3.16.0
• Upstream repository https://github.com/flutter/flutter.git
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Desktop (please complete the following information):
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