Hi, I'm looking for some info on when you can call the method of IForm.addHiddenValue and IForm.addDeferredRunnables. Looking at the Tapestry 4 source code, Form.java implements IForm. The implementation method for addHiddenValue and addDeferredRunnables depended on FormSupport instance (_formSupport). However, _formSupport is only instantiated during Form's renderComponent. Calling addHIddenValue or addDeferredRunnables outside renderComponent cycle will throw NullPointerException. The reason I'm calling addHiddenValue is to add several hidden fields into every form that'll be generated by many pages, so it's not practical to do that within .html by adding @Hidden components.
Thanks.
