allow to set custom localization messages

example/lib/main.dart

@@ -59,6 +59,9 @@ class _DemoPageState extends State<DemoPage> {
             ListView(
               children: [
                 WriterWidget(
+                  messages: const Messages(
+                    createButton: 'Create Code',
+                  ),
                   onSuccess: (result, bytes) {
                     setState(() {
                       createdCodeBytes = bytes;

lib/flutter_zxing.dart

@@ -5,3 +5,4 @@ export 'src/ui/scanner_overlay.dart';
 export 'src/ui/writer_widget.dart';
 export 'src/utils/extentions.dart';
 export 'src/utils/image_converter.dart';
+export 'src/utils/messages.dart';

lib/src/ui/writer_widget.dart

@@ -14,6 +14,7 @@ class WriterWidget extends StatefulWidget {
     this.height = 120,
     this.margin = 0,
     this.eccLevel = 0,
+    this.messages = const Messages(),
     this.onSuccess,
     this.onError,
   });
@@ -24,6 +25,7 @@ class WriterWidget extends StatefulWidget {
   final int height;
   final int margin;
   final int eccLevel;
+  final Messages messages;
   final Function(EncodeResult result, Uint8List? bytes)? onSuccess;
   final Function(String error)? onError;
 
@@ -69,6 +71,7 @@ class _WriterWidgetState extends State<WriterWidget>
 
   @override
   Widget build(BuildContext context) {
+    final Messages m = widget.messages;
     return SingleChildScrollView(
       child: Form(
         key: _formKey,
@@ -91,13 +94,13 @@ class _WriterWidgetState extends State<WriterWidget>
                 decoration: InputDecoration(
                   border: const OutlineInputBorder(),
                   filled: true,
-                  labelText: 'Enter barcode text here',
+                  labelText: m.textLabel,
                   counterText:
                       '${_textController.value.text.length} / $_maxTextLength',
                 ),
                 validator: (String? value) {
                   if (value?.isEmpty ?? false) {
-                    return 'Please enter some text';
+                    return m.invalidText;
                   }
                   return null;
                 },
@@ -125,13 +128,13 @@ class _WriterWidgetState extends State<WriterWidget>
                     child: TextFormField(
                       controller: _widthController,
                       keyboardType: TextInputType.number,
-                      decoration: const InputDecoration(
-                        labelText: 'Width',
+                      decoration: InputDecoration(
+                        labelText: m.widthLabel,
                       ),
                       validator: (String? value) {
                         final int? width = int.tryParse(value ?? '');
                         if (width == null) {
-                          return 'Invalid number';
+                          return m.invalidWidth;
                         }
                         return null;
                       },
@@ -142,13 +145,13 @@ class _WriterWidgetState extends State<WriterWidget>
                     child: TextFormField(
                       controller: _heightController,
                       keyboardType: TextInputType.number,
-                      decoration: const InputDecoration(
-                        labelText: 'Height',
+                      decoration: InputDecoration(
+                        labelText: m.heightLabel,
                       ),
                       validator: (String? value) {
                         final int? width = int.tryParse(value ?? '');
                         if (width == null) {
-                          return 'Invalid number';
+                          return m.invalidHeight;
                         }
                         return null;
                       },
@@ -163,13 +166,13 @@ class _WriterWidgetState extends State<WriterWidget>
                     child: TextFormField(
                       controller: _marginController,
                       keyboardType: TextInputType.number,
-                      decoration: const InputDecoration(
-                        labelText: 'Margin',
+                      decoration: InputDecoration(
+                        labelText: m.marginLabel,
                       ),
                       validator: (String? value) {
                         final int? width = int.tryParse(value ?? '');
                         if (width == null) {
-                          return 'Invalid number';
+                          return m.invalidMargin;
                         }
                         return null;
                       },
@@ -180,13 +183,13 @@ class _WriterWidgetState extends State<WriterWidget>
                     child: TextFormField(
                       controller: _eccController,
                       keyboardType: TextInputType.number,
-                      decoration: const InputDecoration(
-                        labelText: 'ECC Level',
+                      decoration: InputDecoration(
+                        labelText: m.eccLevelLabel,
                       ),
                       validator: (String? value) {
                         final int? width = int.tryParse(value ?? '');
                         if (width == null) {
-                          return 'Invalid number';
+                          return m.invalidEccLevel;
                         }
                         return null;
                       },
@@ -198,7 +201,7 @@ class _WriterWidgetState extends State<WriterWidget>
               // Write button
               ElevatedButton(
                 onPressed: createBarcode,
-                child: const Text('Create'),
+                child: Text(m.createButton),
               ),
               const SizedBox(height: 10),
             ],

lib/src/utils/messages.dart

@@ -0,0 +1,29 @@
+class Messages {
+  const Messages({
+    this.createButton = 'Create',
+    this.textLabel = 'Enter barcode text here',
+    this.marginLabel = 'Margin',
+    this.eccLevelLabel = 'ECC Level',
+    this.widthLabel = 'Width',
+    this.heightLabel = 'Height',
+    this.invalidText = 'Please enter some text',
+    this.invalidWidth = 'Invalid width',
+    this.invalidHeight = 'Invalid height',
+    this.invalidMargin = 'Invalid margin',
+    this.invalidEccLevel = 'Invalid ECC level',
+  });
+
+  final String createButton;
+
+  final String textLabel;
+  final String marginLabel;
+  final String eccLevelLabel;
+  final String widthLabel;
+  final String heightLabel;
+
+  final String invalidText;
+  final String invalidWidth;
+  final String invalidHeight;
+  final String invalidMargin;
+  final String invalidEccLevel;
+}