Making editable cells of a table readonly having Scroll Bar with itext - itext

Question

Please find the below code.
public class MakingFieldReadOnly implements PdfPCellEvent {
/** The resulting PDF. */
public static final String RESULT1 = "text_fields.pdf";
/** The resulting PDF. */
public static final String RESULT2 = "text_filled.pdf";
/** The text field index of a TextField that needs to be added to a cell. */
protected int tf;
public static final String CONTENT = "Write any thing so that it exceeds the content limit of the textfield and scroll bar comes. asdadasdasdasdasdasdasdasdasddlfjklfjljdflkjasdfjasdfjsldfjlsdjflsjdfljdflkjsdfljsldfjlsdjflskdfjlskdfjlsdjflskdjflksdjflksdjflkjsdflkjsdfljsdfkljsdlfjlsdjkfasdadasdasdasdasdasdasdasdasddlfjklfjljdflkjasdfjasdfjsldfjlsdjflsjdfljdflkjsdfljsldfjlsdjflskdfjlskdfjlsdjflskdjflksdjflksdjflkjsdflkjsdfljsdfkljsdlfjlsdjkfasdadasdasdasdasdasdasdasdasddlfjklfjljdflkjasdfjasdfjsldfjlsdjflsjdfljdflkjsdfljsldfjlsdjflskdfjlskdfjlsdjflskdjflksdjflksdjflkjsdflkjsdfljsdfkljsdlfjljkf";
/**
* Creates a cell event that will add a text field to a cell.
* #param tf a text field index.
*/
public MakingFieldReadOnly(int tf) {
this.tf = tf;
}
/**
* Manipulates a PDF file src with the file dest as result
* #param src the original PDF
* #param dest the resulting PDF
* #throws IOException
* #throws DocumentException */
public void manipulatePdf(String src, String dest) throws IOException, DocumentException {
PdfReader reader = new PdfReader(src);
PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest));
AcroFields form = stamper.getAcroFields();
form.setField("text1_1", CONTENT);
form.setField("text1_2", CONTENT);
form.setField("text1_3", CONTENT);
form.setField("text1_4", CONTENT);
form.setFieldProperty("text1_1","setfflags",TextField.READ_ONLY , null);
form.setFieldProperty("text1_2","setfflags",TextField.READ_ONLY , null);
form.setFieldProperty("text1_3","setfflags",TextField.READ_ONLY , null);
form.setFieldProperty("text1_4","setfflags",TextField.READ_ONLY , null);
stamper.close();
//reader.close();
}
/**
* Creates a PDF document.
* #param filename the path to the new PDF document
* #throws DocumentException
* #throws IOException
*/
public void createPdf(String filename) throws DocumentException, IOException {
// step 1
Document document = new Document();
// step 2
PdfWriter.getInstance(document, new FileOutputStream(filename));
// step 3
document.open();
// step 4
PdfPCell cell;
PdfPTable table = new PdfPTable(2);
table.setWidths(new int[]{ 1, 2 });
table.addCell("Name:");
cell = new PdfPCell();
cell.setCellEvent(new MakingFieldReadOnly(1));
cell.setFixedHeight(60);
table.addCell(cell);
table.addCell("Loginname:");
cell = new PdfPCell();
cell.setCellEvent(new MakingFieldReadOnly(2));
cell.setFixedHeight(60);
table.addCell(cell);
table.addCell("Password:");
cell = new PdfPCell();
cell.setCellEvent(new MakingFieldReadOnly(3));
cell.setFixedHeight(60);
table.addCell(cell);
table.addCell("Reason:");
cell = new PdfPCell();
cell.setCellEvent(new MakingFieldReadOnly(4));
cell.setFixedHeight(60);
table.addCell(cell);
document.add(table);
// step 5
document.close();
}
/**
* Creates and adds a text field that will be added to a cell.
* #see com.itextpdf.text.pdf.PdfPCellEvent#cellLayout(com.itextpdf.text.pdf.PdfPCell,
* com.itextpdf.text.Rectangle, com.itextpdf.text.pdf.PdfContentByte[])
*/
public void cellLayout(PdfPCell cell, Rectangle rectangle, PdfContentByte[] canvases) {
PdfWriter writer = canvases[0].getPdfWriter();
TextField text = new TextField(writer, rectangle, String.format("text1_%s",tf));
text.setBackgroundColor(new GrayColor(0.75f));
text.setOptions(TextField.MULTILINE | TextField.REQUIRED);
text.setBorderStyle(PdfBorderDictionary.STYLE_BEVELED);
text.setFontSize(8);
try {
PdfFormField field = text.getTextField();
writer.addAnnotation(field);
}
catch(IOException ioe) {
throw new ExceptionConverter(ioe);
}
catch(DocumentException de) {
throw new ExceptionConverter(de);
}
}
/**
* Main method
* #param args no arguments needed
* #throws IOException
* #throws DocumentException
*/
public static void main(String[] args) throws DocumentException, IOException {
MakingFieldReadOnly example = new MakingFieldReadOnly(0);
example.createPdf(RESULT1);
example.manipulatePdf(RESULT1, RESULT2);
}
}
Please run the above code and generate the document. I have used itext-1.3.jar but same behavior shown with itext-5.3.5.jar.
In the second file named as "text_filled.pdf", I have four pdf cells(fields) in the table. My code is making these editable fields read only but I want scroll bar also(when content exceeds the field limit) as like it is coming for 4th one only, so that user can be able to view whole content without having edit permission.
Could I get read only mode with scroll bar(if content is more than limit of the text field) for each cell of the the table.
I have tried the below code also for making the fields read only.
form.setFieldProperty("text1_1","setfflags",PdfFormField.FF_READ_ONLY , null);
form.setFieldProperty("text1_2","setfflags",PdfFormField.FF_READ_ONLY , null);
form.setFieldProperty("text1_3","setfflags",PdfFormField.FF_READ_ONLY, null);
form.setFieldProperty("text1_4","setfflags",PdfFormField.FF_READ_ONLY , null);
If from these codes can't be done then any other possible solution.

Answer 1

I have tried your example, and I have discovered that the behavior you experience is caused by a bug in Adobe Acrobat / Reader. The bug occurs when the borders of the widget annotations of different text fields overlap.
Once I made sure that there was no overlap between the different fields, the scroll bars appeared.
How did I make sure that there was no overlap? Simply by changing the way the TextField instance created in your cellLayout() method:
Rectangle rect = new Rectangle(
rectangle.getLeft(), rectangle.getTop() - 1,
rectangle.getRight(), rectangle.getBottom() + 1);
TextField text = new TextField(writer, rect, String.format("text1_%s",tf));
Now the rectangles that define the text field no longer overlap, and you no longer experience the Adobe Acrobat / Reader bug.