The bug about radio buttons flattening is fixed

DEVSIX-489

Author: pavel-morozov-duallab

forms/src/main/java/com/itextpdf/forms/PdfAcroForm.java

@@ -540,6 +540,7 @@ public void flattenFields() {
         }
         Set<PdfFormField> fields;
         if (fieldsForFlattening.isEmpty()) {
+            this.fields.clear();
             fields = new LinkedHashSet<>(getFormFields().values());
         } else {
             fields = new LinkedHashSet<>();

forms/src/main/java/com/itextpdf/forms/fields/PdfFormField.java

@@ -427,7 +427,6 @@ public static PdfChoiceFormField createChoice(PdfDocument doc, Rectangle rect, S
 
         PdfFormXObject xObject = new PdfFormXObject(new Rectangle(0, 0, rect.getWidth(), rect.getHeight()));
         field.drawMultiLineTextAppearance(rect, font, fontSize, value, xObject);
-//        PdfFormXObject xObject = field.drawMultiLineTextAppearance(rect, font, fontSize, value, new PdfResources());
         xObject.getResources().addFont(doc, font);
         annot.setNormalAppearance(xObject.getPdfObject());
 
@@ -484,7 +483,8 @@ public static PdfButtonFormField createRadioGroup(PdfDocument doc, String name,
      */
     public static PdfFormField createRadioButton(PdfDocument doc, Rectangle rect, PdfButtonFormField radioGroup, String value) {
         PdfWidgetAnnotation annot = new PdfWidgetAnnotation(rect);
-        PdfFormField radio = new PdfFormField(annot, doc);
+        PdfFormField radio = new PdfButtonFormField(annot, doc);
+
         String name = radioGroup.getValue().toString().substring(1);
         if (name.equals(value)) {
             annot.setAppearanceState(new PdfName(value));

forms/src/test/java/com/itextpdf/forms/FormFieldsTaggingTest.java

@@ -112,7 +112,6 @@ public void formFieldTaggingTest04() throws IOException, InterruptedException, P
 
     /**
      * Form fields flattening in the tagged document (writer mode).
-     * TODO bug with forms flattening: radiobuttons are not flattened
      */
     @Test
     public void formFieldTaggingTest05() throws IOException, InterruptedException, ParserConfigurationException, SAXException {