Default printer function added

README.md

@@ -1,6 +1,10 @@
-# thermal_printer
+# Note:
+This is a forked project of: https://pub.dev/packages/thermal_printer
+This has an additional function to get default printer selected in windows in case of USB with function getDefaultPrinter() in dart
 
-[![Pub Version](https://img.shields.io/badge/pub-v1.0.5-green)](https://pub.dev/packages/thermal_printer)
+# Printer_service
+
+<!-- [![Pub Version](https://img.shields.io/badge/pub-v1.0.5-green)](https://pub.dev/packages/thermal_printer) -->
 
 A library to discover printers, and send printer commands.
 

example/pubspec.yaml

@@ -6,7 +6,7 @@ description: Demonstrates how to use the thermal_printer plugin.
 publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 
 environment:
-  sdk: '>=2.18.4 <3.3.10'
+  sdk: '>=2.18.4 <3.5.9'
 
 # Dependencies specify other packages that your package needs in order to work.
 # To automatically upgrade your package dependencies to the latest versions

lib/printer.dart

@@ -27,6 +27,7 @@ abstract class PrinterConnector<T> {
   Future<bool> send(List<int> bytes);
   Future<bool> connect(T model);
   Future<bool> disconnect({int? delayMs});
+  Future<String> getDefaultPrinter();
 }
 
 abstract class GenericPrinter<T> extends Printer {

lib/src/connectors/bluetooth.dart

@@ -260,4 +260,10 @@ class BluetoothPrinterConnector implements PrinterConnector<BluetoothPrinterInpu
       return false;
     }
   }
+
+  @override
+  Future<String> getDefaultPrinter() {
+    // TODO: implement getDefaultPrinter
+    throw UnimplementedError();
+  }
 }

lib/src/connectors/tcp.dart

@@ -186,4 +186,10 @@ class TcpPrinterConnector implements PrinterConnector<TcpPrinterInput> {
       },
     );
   }
+
+  @override
+  Future<String> getDefaultPrinter() {
+    // TODO: implement getDefaultPrinter
+    throw UnimplementedError();
+  }
 }

lib/src/connectors/usb.dart

@@ -198,4 +198,16 @@ class UsbPrinterConnector implements PrinterConnector<UsbPrinterInput> {
     else
       return false;
   }
+
+  @override
+  Future<String> getDefaultPrinter() async{
+    try{
+      var printerName = await flutterPrinterChannel.invokeMethod('getDefaultPrinter');
+      return printerName;
+    } catch(e){
+      return "";
+    }
+  }
+
+
 }

lib/src/printer_manager.dart

@@ -25,6 +25,16 @@ class PrinterManager {
     }
   }
 
+  Future<String> getDefaultPrinter({PrinterType type = PrinterType.usb}) async {
+    if (type == PrinterType.bluetooth && (Platform.isIOS || Platform.isAndroid)) {
+      return await bluetoothPrinterConnector.getDefaultPrinter();
+    } else if (type == PrinterType.usb && (Platform.isAndroid || Platform.isWindows)) {
+      return await usbPrinterConnector.getDefaultPrinter();
+    } else {
+      return await tcpPrinterConnector.getDefaultPrinter();
+    }
+  }
+
   Future<bool> connect({required PrinterType type, required BasePrinterInput model}) async {
     if (type == PrinterType.bluetooth && (Platform.isIOS || Platform.isAndroid)) {
       try {

pubspec.yaml

@@ -1,7 +1,7 @@
-name: thermal_printer
+name: printer_service
 description: A flutter plugin that prints esc commands to printers in different platforms such as android, ios, windows and different interfaces Bluetooth and BLE, TCP and USB
 version: 1.0.5
-homepage: https://github.com/codingdevs/thermal_printer
+homepage: https://github.com/arpitsharma007/printer_service/
 
 # This package supports all platforms listed below.
 platforms:

windows/thermal_printer_plugin.cpp

@@ -125,6 +125,28 @@ namespace
         return result->Success(EncodableValue(success));
       }
     }
+    else if (method_call.method_name().compare("getDefaultPrinter") == 0)
+    {
+      wchar_t defaultPrinterName[MAX_PATH];  // Corrected to wchar_t buffer
+
+      DWORD size = MAX_PATH;
+      if (GetDefaultPrinter(defaultPrinterName, &size) > 0) {  // Pass the buffer directly
+          wprintf(L"Default Printer: %s\n", defaultPrinterName);  // Use wprintf for wide strings
+          int utf8Length = WideCharToMultiByte(CP_UTF8, 0, defaultPrinterName, -1, NULL, 0, NULL, NULL);
+        if (utf8Length > 0) {
+            std::string utf8PrinterName(utf8Length, 0);
+            WideCharToMultiByte(CP_UTF8, 0, defaultPrinterName, -1, &utf8PrinterName[0], utf8Length, NULL, NULL);
+
+            // Return the UTF-8 encoded printer name
+            return result->Success(EncodableValue(utf8PrinterName));
+        } else {
+            return result->Error("CONVERSION_ERROR", "Failed to convert printer name to UTF-8.");
+        }
+      } else {
+          printf("Error getting default printer\n");
+      }
+
+    }
     else
     {
       result->NotImplemented();