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@ -23,6 +23,13 @@ class _ZxingWriterWidgetState extends State<ZxingWriterWidget>
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with TickerProviderStateMixin { |
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final GlobalKey<FormState> _formKey = GlobalKey<FormState>(); |
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final TextEditingController _textController = TextEditingController(); |
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final TextEditingController _widthController = |
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TextEditingController(text: "300"); |
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final TextEditingController _heightController = |
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TextEditingController(text: "300"); |
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final TextEditingController _marginController = |
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TextEditingController(text: "10"); |
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final TextEditingController _eccController = TextEditingController(text: "0"); |
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bool isAndroid() => Theme.of(context).platform == TargetPlatform.android; |
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@ -41,6 +48,30 @@ class _ZxingWriterWidgetState extends State<ZxingWriterWidget>
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mainAxisSize: MainAxisSize.min, |
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mainAxisAlignment: MainAxisAlignment.spaceEvenly, |
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children: [ |
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const SizedBox(height: 20), |
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// Input multiline text |
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TextFormField( |
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controller: _textController, |
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keyboardType: TextInputType.multiline, |
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maxLines: null, |
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maxLength: _maxTextLength, |
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onChanged: (value) { |
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setState(() {}); |
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}, |
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decoration: InputDecoration( |
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border: const OutlineInputBorder(), |
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filled: true, |
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labelText: 'Enter barcode text here', |
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counterText: |
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'${_textController.value.text.length} / $_maxTextLength', |
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), |
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validator: (value) { |
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if (value?.isEmpty == true) { |
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return 'Please enter some text'; |
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} |
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return null; |
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}, |
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), |
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const SizedBox(height: 20), |
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// Format DropDown button |
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DropdownButtonFormField<int>( |
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@ -58,54 +89,85 @@ class _ZxingWriterWidgetState extends State<ZxingWriterWidget>
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}, |
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), |
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const SizedBox(height: 20), |
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// Input multiline text |
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TextFormField( |
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controller: _textController, |
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keyboardType: TextInputType.multiline, |
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maxLines: null, |
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maxLength: _maxTextLength, |
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onChanged: (value) { |
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setState(() {}); |
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}, |
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decoration: InputDecoration( |
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border: const OutlineInputBorder(), |
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filled: true, |
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hintText: 'Enter text to create a barcode', |
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counterText: |
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'${_textController.value.text.length} / $_maxTextLength', |
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), |
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Row( |
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children: [ |
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Flexible( |
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child: TextFormField( |
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controller: _widthController, |
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keyboardType: TextInputType.number, |
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decoration: const InputDecoration( |
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labelText: 'Width', |
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), |
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validator: (value) { |
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final width = int.tryParse(value ?? ''); |
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if (width == null) { |
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return 'Invalid number'; |
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} |
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return null; |
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}, |
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), |
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), |
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const SizedBox(width: 8), |
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Flexible( |
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child: TextFormField( |
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controller: _heightController, |
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keyboardType: TextInputType.number, |
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decoration: const InputDecoration( |
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labelText: 'Height', |
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), |
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validator: (value) { |
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final width = int.tryParse(value ?? ''); |
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if (width == null) { |
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return 'Invalid number'; |
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} |
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return null; |
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}, |
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), |
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), |
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], |
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), |
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const SizedBox(height: 20), |
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Row( |
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children: [ |
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Flexible( |
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child: TextFormField( |
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controller: _marginController, |
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keyboardType: TextInputType.number, |
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decoration: const InputDecoration( |
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labelText: 'Margin', |
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), |
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validator: (value) { |
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final width = int.tryParse(value ?? ''); |
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if (width == null) { |
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return 'Invalid number'; |
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} |
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return null; |
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}, |
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), |
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), |
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const SizedBox(width: 8), |
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Flexible( |
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child: TextFormField( |
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controller: _eccController, |
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keyboardType: TextInputType.number, |
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decoration: const InputDecoration( |
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labelText: 'ECC Level', |
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), |
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validator: (value) { |
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final width = int.tryParse(value ?? ''); |
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if (width == null) { |
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return 'Invalid number'; |
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} |
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return null; |
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}, |
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), |
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), |
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], |
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), |
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const SizedBox(height: 20), |
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// Write button |
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ElevatedButton( |
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onPressed: () { |
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if (_formKey.currentState?.validate() ?? false) { |
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_formKey.currentState?.save(); |
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FocusScope.of(context).unfocus(); |
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final text = _textController.value.text; |
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const width = 300; |
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const height = 300; |
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var result = FlutterZxing.encodeBarcode( |
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text, width, height, _codeFormat, 5, 0); |
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String? error; |
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if (result.isValidBool) { |
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try { |
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final img = |
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imglib.Image.fromBytes(width, height, result.bytes); |
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final encodedBytes = |
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Uint8List.fromList(imglib.encodeJpg(img)); |
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widget.onSuccess?.call(result, encodedBytes); |
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} on Exception catch (e) { |
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error = e.toString(); |
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} |
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} else { |
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error = result.errorMessage; |
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} |
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if (error != null) { |
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debugPrint(error); |
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widget.onError?.call(error); |
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} |
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} |
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}, |
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onPressed: createBarcode, |
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child: const Text('Create'), |
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), |
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const SizedBox(height: 20), |
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@ -115,4 +177,34 @@ class _ZxingWriterWidgetState extends State<ZxingWriterWidget>
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), |
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); |
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} |
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void createBarcode() { |
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if (_formKey.currentState?.validate() ?? false) { |
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_formKey.currentState?.save(); |
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FocusScope.of(context).unfocus(); |
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final text = _textController.value.text; |
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final width = int.parse(_widthController.value.text); |
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final height = int.parse(_heightController.value.text); |
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final margin = int.parse(_marginController.value.text); |
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final ecc = int.parse(_eccController.value.text); |
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var result = FlutterZxing.encodeBarcode( |
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text, width, height, _codeFormat, margin, ecc); |
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String? error; |
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if (result.isValidBool) { |
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try { |
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final img = imglib.Image.fromBytes(width, height, result.bytes); |
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final encodedBytes = Uint8List.fromList(imglib.encodeJpg(img)); |
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widget.onSuccess?.call(result, encodedBytes); |
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} on Exception catch (e) { |
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error = e.toString(); |
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} |
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} else { |
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error = result.errorMessage; |
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} |
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if (error != null) { |
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debugPrint(error); |
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widget.onError?.call(error); |
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} |
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} |
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} |
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} |
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Khoren Markosyan
3 years ago