Trigger a Signature Date when Digital Signature Field is Signed

Question

I'm looking for a way to have a date field populate when a digital signature field is signed on my Adobe Designer Form. The signature technology I'm using does not work seamlessly with Adobe LiveCycle Designer and is unable to add the date when the document is signed. So I was thinking I could call a function to add the date to the date field when the signature field is signed. I just dont know how to do it.
Please help!
Thanks!

Answer 1

Here is some code that will allow you to check the signature field:
// check to see if Claimant signature field is signed.
var oSOM = claimsign.somExpression;  // Returns the full SOM expression i.e. xfa[0].form[0].form1[0]...
var truncSOM = oSOM.substring(15); // Truncating 'xfa[0].form[0]' from SOM to get acroforms name of the field.
var oState = event.target.getField(truncSOM).signatureValidate(); // Get the current field's signed state
In this case the signature field is called claimsign. After running this code the variable oState will conatin a value ....if it is 0 then the field is not signed. So you can add code like this:
if (oState == 0 ) {
     // signature field is not signed
     app.alert("You must sign the form before submitting")
} else {
     //The signature field is signed
     go through your submission process code
Hope that helps
Paul