How to make sure Signature Field is signed

Question

Hi,
I have created a User Form in Adobe Designer 7. I have included a signature field in this form. I want to make sure that the user signs the form before they submit it. I have not found a way to be able to check this. I am using JavaScript and I tried to check the signature field to see if it was null. This did not work. The return value for this field is an object. Does anyone know the JavaScript code that will work with Designer, I read the Adobe JavaScript Reference Manual, but that code does not work with Designer.
Also if anyone knows where I can find some sort of manual of Adobe Designer JavaScript, that would be great. Most of the Adobe Acrobat JavaScript does not work with Designer!

Answer 1

Designers object model does not have signature information but you can access the signature information via the Acrobat object model (i.e. the standard javascript reference manual - which you already have)
All you need to do is use the signatureInfo property of the signature field, for example:
var oSign = event.target.getField("form1[0].P1[0].SignatureField1[0]");
var signInfo = oSign.signatureInfo();
app.alert("Name = " + signInfo.name);
signInfo.name will be null, if the field is not signed.
NOTE: make sure your hierarchy is correct when you make the call to getField() - it should match the hierarchy palette. In the example above my root is form1, page name is P1 and the field is called SignatureField1
There is a XFA scripting reference, Have a look in the FAQ folder.