Took me a couple readings of the code to figure this one out myself.
CreateRadioButton creates the visual element for a radio button field, not the
parent field under which the kids reside. The "no toggle off" behavior should
be in the individual child fields, not the parent.
The parent field is working, so that's clearly not a big deal. And to fix your
button creation code, you need to add:
checkBox.options |= PdfFormField.FF_NO_TOGGLE_TO_OFF;
No that isn't one of the listed options in BaseField's JavaDoc. The full list
of valid options are all the PdfFormField.FF_* contstants, some of which are
duplicated in BaseField without the leading FF_.
--Mark Storer
Senior Software Engineer
Cardiff.com
import legalese.Disclaimer;
Disclaimer<Cardiff> DisCard = null;
________________________________
From: André Lemay [mailto:lemay.an...@gmail.com]
Sent: Tuesday, April 12, 2011 8:54 AM
To: itext-questions@lists.sourceforge.net
Subject: [iText-questions] iTextSharp RadioGroup noToggleToOff not
working.
Here are the bits of code in question :
[code]
PdfFormField group1 = PdfFormField.CreateRadioButton(writer, false);
group1.FieldName = "group1";
group1.AddKid(CreateCheckBox(over, "check1", 8.5f, 363,
459.8f + GIFLOffset_1, 0.3f));
group1.AddKid(CreateCheckBox(over, "check2", 8.5f, 471,
459.8f + GIFLOffset_1, 0.3f));
writer.AddAnnotation(group1);[/code]
and the CreateCheckBox method :
[code]
private static PdfFormField CreateCheckBox(PdfContentByte layer, String
name, float size, float llx, float lly, float thickness)
{
PdfFormField field;
RadioCheckField checkbox;
Rectangle rect = new Rectangle(llx, lly, llx + size, lly +
size);
checkbox = new RadioCheckField(layer.PdfWriter, rect, name,
"on_" + name);
checkbox.CheckType = RadioCheckField.TYPE_CHECK;
checkbox.BackgroundColor = BaseColor.WHITE;
checkbox.BorderColor = BaseColor.BLACK;
checkbox.BorderStyle = PdfBorderDictionary.STYLE_SOLID;
checkbox.BorderWidth = 0.4f;
checkbox.FieldName = name;
field = checkbox.RadioField;
layer.Rectangle(rect);
layer.SetLineWidth(0.4f);
layer.Stroke();
return field;
}[/code]
This code is part of a larger program that generates a customized
document. The checkboxes are created fine and show up properly, and I can check
one or the other (but not both) as expected, however they cannot be unchecked
at all.
I was under the impression that the false value passed into the
CreateRadioButton method should make it so that you can uncheck a box so that
neither will be checked, but even changing that to true had no effect on
behaviour (that behaviour being that once one of the checkboxes is checked, one
will always be checked unless a reset button elsewhere on the form is clicked).
Any help getting the checkboxes to be uncheckable would be greatly
appreciated.
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