Comment ajouter une bordure à une case à cocher et la rendre toujours visible

Question

Lorsque je crée mon PDF, la case à cocher n'a d'abord aucune apparence. Après avoir cliqué dessus (onBlur) il y a une sorte d'ombre visible et quand elle est focalisée elle n'est plus visible. Comment puis-je le rendre toujours visible? Et comment puis-je ajouter une sorte de bordure (sans le faire manuellement avec une classe rectangle)?

public class CheckBoxWriter { 

    public static void main(String[] args) throws IOException { 

     PDDocument document = new PDDocument(); 
     PDPage page = new PDPage(); 
     document.addPage(page); 

     // just a rectangle to be able to locate the checkbox 
     PDPageContentStream contentStream = new PDPageContentStream(document, page, AppendMode.APPEND, false); 
     contentStream.addRect(100, 100, 50, 50); 
     contentStream.setLineWidth(1); 
     contentStream.setNonStrokingColor(Color.WHITE); 
     contentStream.setStrokingColor(Color.BLACK); 
     contentStream.stroke(); 
     contentStream.close(); 

     PDAcroForm acroForm = new PDAcroForm(document); 
     PDCheckBox checkBox = new PDCheckBox(acroForm); 
     checkBox.setPartialName("xxx"); 

     PDAnnotationWidget widget = new PDAnnotationWidget(); 
     widget.setRectangle(new PDRectangle(100, 100, 10, 10)); 
     widget.setAnnotationFlags(4); 
     widget.setPage(page); 
     widget.setParent(checkBox); 

     List<PDAnnotationWidget> widgets = new ArrayList<>(); 
     widgets.add(widget); 
     page.getAnnotations().add(widget); 
     checkBox.setWidgets(widgets); 

     acroForm.getFields().add(checkBox); 
     document.getDocumentCatalog().setAcroForm(acroForm); 

     File file = new File("test.pdf"); 

     document.save(file); 
     document.close(); 
    } 
} 

Answer 1

Essayez ceci - il crée des flux d'apparence pour la case à cocher, à savoir les flux de contenu pour le « Oui » et l'affichage « Off ». J'ai également modifié la façon dont vous utilisiez les widgets, de sorte que le fichier soit plus simple. La stratégie que vous avez utilisée (widget séparé du champ) n'est utile que si vous avez plusieurs widgets pour un champ.

Pour voir ce que les opérateurs font (c'est le charabia), jetez un oeil à la PDF specification, recherche de "résumé de l'opérateur".

public static void main(String[] args) throws IOException 
{ 
    PDDocument document = new PDDocument(); 
    PDPage page = new PDPage(); 
    document.addPage(page); 

    // just a rectangle to be able to locate the checkbox 
    PDPageContentStream contentStream = new PDPageContentStream(document, page, AppendMode.APPEND, false); 
    contentStream.addRect(100, 100, 50, 50); 
    contentStream.setLineWidth(1); 
    contentStream.setNonStrokingColor(Color.WHITE); 
    contentStream.setStrokingColor(Color.BLACK); 
    contentStream.stroke(); 
    contentStream.close(); 

    PDAcroForm acroForm = new PDAcroForm(document); 
    PDCheckBox checkBox = new PDCheckBox(acroForm); 
    checkBox.setPartialName("xxx"); 


    //PDAnnotationWidget widget = new PDAnnotationWidget(); 
    PDAnnotationWidget widget = checkBox.getWidgets().get(0); 
    widget.setRectangle(new PDRectangle(100, 100, 10, 10)); 
    widget.setAnnotationFlags(4); 
    widget.setPage(page); 
    //widget.setParent(checkBox); 

    // inspired by annot 92 of file from PDFBOX-563 
    // annot 172 has "checkmark" instead, but more more complex, needs ZaDb 

    String offNString = "1 g\n" 
      + "0 0 9.5 9.5 re\n" 
      + "f\n" 
      + "0.5 0.5 9.5 9.5 re\n" 
      + "s"; 
    String offDString = "0.75 g\n" 
      + "0 0 9.5 9.5 re\n" 
      + "f\n" 
      + "0.5 0.5 9.5 9.5 re\n" 
      + "s"; 
    String yesNString = "1 g\n" 
      + "0 0 9 9.5 re\n" 
      + "f\n" 
      + "0.5 0.5 9.5 9.5 re\n" 
      + "s\n" 
      + "q\n" 
      + " 1 1 9 9 re\n" 
      + " W\n" 
      + " n\n" 
      + " 2 8 m\n" 
      + " 8 2 l\n" 
      + " 8 8 m\n" 
      + " 2 2 l\n" 
      + " s\n" 
      + "Q"; 
    String yesDString = "0.75 g\n" 
      + "0 0 9 9.5 re\n" 
      + "f\n" 
      + "0.5 0.5 9.5 9.5 re\n" 
      + "s\n" 
      + "q\n" 
      + " 1 1 9 9 re\n" 
      + " W\n" 
      + " n\n" 
      + " 2 8 m\n" 
      + " 8 2 l\n" 
      + " 8 8 m\n" 
      + " 2 2 l\n" 
      + " s\n" 
      + "Q"; 

    COSDictionary apNDict = new COSDictionary(); 
    COSStream offNStream = new COSStream(); 
    offNStream.setItem(COSName.BBOX, new PDRectangle(10, 10)); 
    offNStream.setItem(COSName.FORMTYPE, COSInteger.ONE); 
    offNStream.setItem(COSName.TYPE, COSName.XOBJECT); 
    offNStream.setItem(COSName.SUBTYPE, COSName.FORM); 
    offNStream.setItem(COSName.MATRIX, new Matrix().toCOSArray()); 
    offNStream.setItem(COSName.RESOURCES, new COSDictionary()); 
    OutputStream os = offNStream.createOutputStream(); 
    os.write(offNString.getBytes()); 
    os.close(); 
    apNDict.setItem(COSName.Off, offNStream); 

    COSStream yesNStream = new COSStream(); 
    yesNStream.setItem(COSName.BBOX, new PDRectangle(10, 10)); 
    yesNStream.setItem(COSName.FORMTYPE, COSInteger.ONE); 
    yesNStream.setItem(COSName.TYPE, COSName.XOBJECT); 
    yesNStream.setItem(COSName.SUBTYPE, COSName.FORM); 
    yesNStream.setItem(COSName.MATRIX, new Matrix().toCOSArray()); 
    yesNStream.setItem(COSName.RESOURCES, new COSDictionary()); 
    os = yesNStream.createOutputStream(); 
    os.write(yesNString.getBytes()); 
    os.close(); 
    apNDict.setItem(COSName.getPDFName("Yes"), yesNStream); 

    COSDictionary apDDict = new COSDictionary(); 
    COSStream offDStream = new COSStream(); 
    offDStream.setItem(COSName.BBOX, new PDRectangle(16, 16)); 
    offDStream.setItem(COSName.FORMTYPE, COSInteger.ONE); 
    offDStream.setItem(COSName.TYPE, COSName.XOBJECT); 
    offDStream.setItem(COSName.SUBTYPE, COSName.FORM); 
    offDStream.setItem(COSName.MATRIX, new Matrix().toCOSArray()); 
    offDStream.setItem(COSName.RESOURCES, new COSDictionary()); 
    os = offDStream.createOutputStream(); 
    os.write(offDString.getBytes()); 
    os.close(); 
    apDDict.setItem(COSName.Off, offDStream); 

    COSStream yesDStream = new COSStream(); 
    yesDStream.setItem(COSName.BBOX, new PDRectangle(16, 16)); 
    yesDStream.setItem(COSName.FORMTYPE, COSInteger.ONE); 
    yesDStream.setItem(COSName.TYPE, COSName.XOBJECT); 
    yesDStream.setItem(COSName.SUBTYPE, COSName.FORM); 
    yesDStream.setItem(COSName.MATRIX, new Matrix().toCOSArray()); 
    yesDStream.setItem(COSName.RESOURCES, new COSDictionary()); 
    os = yesDStream.createOutputStream(); 
    os.write(yesDString.getBytes()); 
    os.close(); 
    apDDict.setItem(COSName.getPDFName("Yes"), yesDStream); 

    PDAppearanceDictionary appearance = new PDAppearanceDictionary(); 
    PDAppearanceEntry appearanceNEntry = new PDAppearanceEntry(apNDict); 
    appearance.setNormalAppearance(appearanceNEntry); 

    // push appearance doesn't look nice enough, has weird effect when pushing 
//  PDAppearanceEntry appearanceDEntry = new PDAppearanceEntry(apDDict); 
//  appearance.setDownAppearance(appearanceDEntry); 

    widget.setAppearance(appearance); 

    // MK (appearance characteristics dictionary) 
    COSDictionary acdDict = new COSDictionary(); 
    acdDict.setItem(COSName.CA, new COSString("8")); // 8 is X, 4 is checkmark 
    COSArray bcArray = new COSArray(); 
    bcArray.add(COSInteger.ZERO); 
    acdDict.setItem(COSName.BC, bcArray); 
    COSArray bgArray = new COSArray(); 
    bgArray.add(COSInteger.ONE); 
    acdDict.setItem(COSName.BG, bgArray); 
    PDAppearanceCharacteristicsDictionary acd = new PDAppearanceCharacteristicsDictionary(acdDict); 
    widget.setAppearanceCharacteristics(acd); 

//  List<PDAnnotationWidget> widgets = new ArrayList<>(); 
//  widgets.add(widget); 
    page.getAnnotations().add(widget); 
//  checkBox.setWidgets(widgets); 

    checkBox.setValue("Yes"); 

    acroForm.getFields().add(checkBox); 
    document.getDocumentCatalog().setAcroForm(acroForm); 

    File file = new File("checkbox.pdf"); 

    document.save(file); 
    document.close(); 
}