InfoPath Dev

I have a form with a disabled submit button until all fields are filled out (using "is blank" rules). When all the fields are filled out the Submit is still disabled until the user "leaves" the last field which is confusing for many. Simple example: First Name, Last Name, and Phone# fields are required to enable the Submit button. User fills out First, Last, and Phone but the cursor is still in the Phone# field, thus the submit is not enabled. As soon as the cursor "leaves" the phone field the submit button is then enabled. Is there a way to enable the submit button as soon as the user starts typing in the last required field, bypassing that the cursor has to leave the field after typing?

Yuck, I know, right? But sadly - no. The data isn't "entered" until the user tabs out. You could, instead of disabling the submit button, have rules on your submit that prevent submit unless all fields are populated. See attached sample, right click the linked file and save locally, right click the saved file and select Design and then you can preview.

Thanks Hilary, much appreciated. I used a hybrid system for my form using what you sent me and what I've already created. The way you use the Calculated field was new to me.

Glad you have an approach that works for you! :)