In think we are getting out of the normal page execution scenario so its doesn't really make sense. Also a submit button will always probably be valid, however the parent form may not be.
regards Malcolm Edgar On Wed, Jan 20, 2010 at 11:01 PM, Bob Schellink <[email protected]> wrote: > I wonder how an on demand binding feature would influence validation. Should > validation also be done lazily? Otherwise one might end up with: > > public void onInit() { > > Submit submit = new Submit("submit"); > if (submit.isClicked()) { > if (submit.isValid()) { > // At this stage the isValid call will return true since no validation > was done yet > } > } > } > > regards > > bob > > On 18/01/2010 11:23 PM, Malcolm Edgar wrote: >> >> +1 I think this is a good idea, so long as the fields parent form >> submit status is respected, i.e. if a page has two forms only fields >> belonging to the submitted form should be able to bind their fields. >> >> regards Malcolm Edgar >> >> On Mon, Jan 18, 2010 at 7:34 PM, Bob Schellink<[email protected]> wrote: >>> >>> Hi all, >>> >>> Thought I'd solicit some feedback on a new feature I've been pondering >>> about >>> the last couple of days. >>> >>> Enter On Demand Binding, the ability for a field to bind to its request >>> parameter when needed! >>> >>> Controls are bound to incoming request parameters during the onProcess >>> phase. However often times we need to know a control's value during the >>> onInit phase, so we can perform conditional logic such as adding new >>> fields >>> to a form. >>> >>> Currently we can either bind a field value explicitly using the method >>> #bindRequestValue, or inspect the HttpRequest parameters: >>> >>> public void onInit() { >>> >>> Checkbox chk = new Checkbox("chk"); >>> chk.bindRequestValue(); // Without On Demand Binding, we need to bind >>> explicitly >>> >>> if (chk.isChecked()) { >>> form.add(new TextField("comment")); >>> } >>> } >>> >>> The idea with On Demand Binding is that Fields should bind to its >>> incoming >>> request parameter when needed. For example: >>> >>> public void onInit() { >>> >>> Checkbox chk = new Checkbox("chk"); >>> >>> if (chk.isChecked()) { >>> form.add(new TextField("comment")); >>> } >>> } >>> >>> >>> What do you think? Will this feature be useful or cause unnecessary >>> confusion? >>> >>> kind regards >>> >>> bob >>> >> > >
