Added PosString class. Updated methods and example.

example/example.dart

@@ -4,15 +4,15 @@ import 'package:esc_pos_printer/src/printer.dart';
 void main() {
   Printer.connect('192.168.0.123').then((printer) {
     printer.reset();
-    printer.println('Normal text');
-    printer.println('Bold text', bold: true);
-    printer.println('Reverse text', reverse: true);
-    printer.println('Underlined text', underline: true);
-    printer.println('Align left', align: PosTextAlign.left);
-    printer.println('Align center', align: PosTextAlign.center);
-    printer.println('Align right', align: PosTextAlign.right);
-    printer.println('Text size 2',
-        height: PosTextSize.size2, width: PosTextSize.size2);
+    printer.println(PosString('Normal text'));
+    printer.println(PosString('Bold text', bold: true));
+    printer.println(PosString('Reverse text', reverse: true));
+    printer.println(PosString('Underlined text', underline: true));
+    printer.println(PosString('Align left', align: PosTextAlign.left));
+    printer.println(PosString('Align center', align: PosTextAlign.center));
+    printer.println(PosString('Align right', align: PosTextAlign.right));
+    printer.println(PosString('Text size 200%',
+        height: PosTextSize.size2, width: PosTextSize.size2));
 
     printer.cut();
 

lib/esc_pos_printer.dart

@@ -8,4 +8,5 @@ library esc_pos_printer;
 
 export './src/enums.dart';
 export './src/exceptions.dart';
+export './src/pos_string.dart';
 export './src/printer.dart';

lib/src/enums.dart

@@ -31,20 +31,3 @@ class PosBeepDuration {
   static const beep400ms = PosBeepDuration._internal(8);
   static const beep450ms = PosBeepDuration._internal(9);
 }
-
-// class PosCol {
-//   const PosCol._internal(this.value);
-//   final int value;
-//   static const col1 = PosCol._internal(1);
-//   static const col2 = PosCol._internal(2);
-//   static const col3 = PosCol._internal(3);
-//   static const col4 = PosCol._internal(4);
-//   static const col5 = PosCol._internal(5);
-//   static const col6 = PosCol._internal(6);
-//   static const col7 = PosCol._internal(7);
-//   static const col8 = PosCol._internal(8);
-//   static const col9 = PosCol._internal(9);
-//   static const col10 = PosCol._internal(10);
-//   static const col11 = PosCol._internal(11);
-//   static const col12 = PosCol._internal(12);
-// }

lib/src/pos_string.dart

+import 'enums.dart';
+
+class PosString {
+  PosString(
+    this.text, {
+    this.bold = false,
+    this.reverse = false,
+    this.underline = false,
+    this.align = PosTextAlign.left,
+    this.height = PosTextSize.size1,
+    this.width = PosTextSize.size1,
+    this.fontType = PosFontType.fontA,
+    this.linesAfter = 0,
+  });
+
+  String text;
+  bool bold = false;
+  bool reverse = false;
+  bool underline = false;
+  PosTextAlign align = PosTextAlign.left;
+  PosTextSize height = PosTextSize.size1;
+  PosTextSize width = PosTextSize.size1;
+  PosFontType fontType = PosFontType.fontA;
+  int linesAfter = 0;
+
+  @override
+  String toString() {
+    return text;
+  }
+}

lib/src/printer.dart

@@ -4,8 +4,9 @@ import 'package:hex/hex.dart';
 import 'commands.dart';
 import 'enums.dart';
 import 'exceptions.dart';
+import 'pos_string.dart';
 
-/// Printer.
+/// Network printer
 class Printer {
   Printer(this._socket) {
     reset();
@@ -29,37 +30,28 @@ class Printer {
     _socket.destroy();
   }
 
-  void println(
-    String text, {
-    bool bold = false,
-    bool reverse = false,
-    bool underline = false,
-    PosTextAlign align = PosTextAlign.left,
-    PosTextSize height = PosTextSize.size1,
-    PosTextSize width = PosTextSize.size1,
-    PosFontType fontType = PosFontType.fontA,
-    int linesAfter = 0,
-  }) {
-    _socket.write(bold ? cBoldOn : cBoldOff);
-    _socket.write(reverse ? cReverseOn : cReverseOff);
-    _socket.write(underline ? cUnderline1dot : cUnderlineOff);
-    _socket.write(align == PosTextAlign.left
+  void println(PosString data) {
+    _socket.write(data.bold ? cBoldOn : cBoldOff);
+    _socket.write(data.reverse ? cReverseOn : cReverseOff);
+    _socket.write(data.underline ? cUnderline1dot : cUnderlineOff);
+    _socket.write(data.align == PosTextAlign.left
         ? cAlignLeft
-        : (align == PosTextAlign.center ? cAlignCenter : cAlignRight));
-    _socket.write(fontType == PosFontType.fontA ? cFontA : cFontB);
+        : (data.align == PosTextAlign.center ? cAlignCenter : cAlignRight));
+    _socket.write(data.fontType == PosFontType.fontA ? cFontA : cFontB);
     // Text size
     _socket.add(
       Uint8List.fromList(
-        List.from(cSizeGSn.codeUnits)..add(PosTextSize.decSize(height, width)),
+        List.from(cSizeGSn.codeUnits)
+          ..add(PosTextSize.decSize(data.height, data.width)),
       ),
     );
 
-    _socket.writeln(text);
-    emptyLines(linesAfter);
+    _socket.writeln(data.text);
+    emptyLines(data.linesAfter);
     reset();
   }
 
-  void printRow(List<int> cols, List<String> data) {
+  void printRow(List<int> cols, List<PosString> data) {
     final validRange = cols.every((val) => val >= 1 && val <= 12);
     if (!validRange) {
       throw PosRowException('Column width should be between 1..12');
@@ -80,7 +72,7 @@ class Printer {
     _socket.writeln();
   }
 
-  void _printCol(int i, String data) {
+  void _printCol(int i, PosString data) {
     final int pos = i == 0 ? 0 : (512 * i / 11 - 1).round();
     final hexStr = pos.toRadixString(16).padLeft(3, '0');
     final hexPair = HEX.decode(hexStr);