directprint

Directprint The plugin allows Flutter applications to raw print to Windows printers using the OpenPrinter/StartDocPrinter system functions, mainly for sending raw text and control codes to POS printers.

The plugin is intended for the Windows platform.

Getting Started

The Directprint() class allows you to send codes directly to a Windows printer with the help of the "print" method.

    Future<String?> print(String printer, String job, Uint8List data)

Call the "print" method with arguments:

String printer - Sistem printr nae 
String job - Specifying job name in print queue
Uint8List data - raw data bytes

The result of the call is a Future String with the following content:

"OK" - if the call ended without error
"ERROR:1" - Error: Opening Printer
"ERROR:2" - Error: Opening Document
"ERROR:3" - Error: Starting Page
"ERROR:4" - Error: Printing Count```

Installing

1. Add this package to your package's pubspec.yaml file as described on the installation tab

2. Import the librarie

   import 'package:directprint/directprint.dart';

Example code

    import 'package:directprint/directprint.dart';
    
    Future doPrint() async {
       // ...
       final _directprintPlugin = Directprint();
   
       // ...
       String data = "Direct print plugin test ...\n\n\n\n";
       Uint8List enctxt = Uint8List.fromList(data.codeUnits);
       
       String printer = 'unknown';
       String job = 'Invoice';
       
       String dpResult =
         await _directprintPlugin.print(printer, job, enctxt) ?? '';
   
       // ...
    }