GWT addSubmitCompleteHandler called twice

Question

I have a form panel (myForm) with a submit button added onto a simple panel. Every time the submit is pressed myForm.addSubmitCompleteHandler is called twice

      mySubmit.addClickHandler(new ClickHandler() {
            @Override
            public void onClick(ClickEvent event) {         
                myForm.submit();
        }});
         ...
         myForm.addSubmitCompleteHandler(new SubmitCompleteHandler() {
            @Override
            public void onSubmitComplete(SubmitCompleteEvent event) {
                // what ever's here happens twice
            }
        }); 

I've double checked my code and ordering and placing of widgets and panels. What could possibly be causing this?

What I am trying to achieve is an alert that submission is complete.

Answer 1

It seems like adding the line

event.preventDefault() 

in the addClickHandler of the submit button helps. Also make sure you don't have duplicate setAction Calls for the form