Jonas created WICKET-6264:
-----------------------------

             Summary: Form: improve error message for disabled/invisible 
IFormSubmittingComponent
                 Key: WICKET-6264
                 URL: https://issues.apache.org/jira/browse/WICKET-6264
             Project: Wicket
          Issue Type: Improvement
          Components: wicket
    Affects Versions: 7.5.0
            Reporter: Jonas
            Priority: Minor


org.apache.wicket.markup.html.form.Form.onFormSubmitted(IFormSubmitter) throws 
WicketRuntimeExceptions in case the IFormSubmittingComponent has is not/no 
longer enabled or visible.

A logged message looks like this:
{noformat}
2016-10-28 11:49:27,289 ERROR [org.apache.wicket.DefaultExceptionMapper] - 
Unexpected error occurred
org.apache.wicket.WicketRuntimeException: Submit Button ok (path=form:ok) is 
not enabled
        at 
org.apache.wicket.markup.html.form.Form.onFormSubmitted(Form.java:772)
        at 
org.apache.wicket.markup.html.form.Form.onFormSubmitted(Form.java:708)
...
{noformat}

This kind of problem is currently quite hard to fix, as neither the error 
message nor the stack trace contains any hint what page is affected.

I would like to propose to add e.g. the pages' class to both error messages, 
e.g. "Submit Button ok (path=form:ok) on page com.foo.bar.WebPage is not 
enabled" and "...visible"








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