Hi, Gregor!
Thanks forreply.
I understand that i can't simply use rpc call right in widget event
handler,
but i want to separate this transport/business layer from widget.
My widget simply shows list of items of some class(Group) and provide
control elements
to manupulate them: edit, delete, add etc.
I am simply interested in a approach. maybe there is some standart way
advices
For now - i provide two methods for widget client -
void add(Group)
void onAdd/onSuccessAdd(Group)
maybe there is some more cultural way ? =)
On 2 дек, 13:37, gregor <[EMAIL PROTECTED]> wrote:
> Hi Relaxo,
>
> The simplest way is to make your RPC call from addBtn.onClick() using
> an anonymous Callback where this callback's onSuccess(..) method adds
> the new Group List<Group> groups and changes the view as required.
> There may be reasons why this would not meet your requirements, but it
> is not possible to say from your example, i.e. on the face of it you
> do not need the controller interface. There isn't a single "right" way
> to do asynchronous RPC - it is possible to over-engineer it and
> equally it's possible to under-engineer it.
>
> If in fact your situation is more complicated than the example
> (leading to a motivation for using this controller interface),
> probably best to give some idea of the overall problem to get further
> advice and options (of which there are several).
>
> regards
> gregor
>
> On Dec 2, 8:15 am, raxelo <[EMAIL PROTECTED]> wrote:
>
>
>
> > First of all sorry for my english.
>
> > I want to write simple GUIwidgetthat will help me to add and delete
> > some business groops
> > like this.
>
> > public class GroupWidget extends Composite implements ClickListener {
> > private Controller controller;
> > private List<Group> groups;
>
> > public GroupWidget(List<Group> groups, Controller
> > controller) {
> > this.controller = controller;
> > //buildwidgetskeleton
> > //init structures
> > }
>
> > public void onClick(Widgetsender) {
> > if(sender == addBtn) {
> > //creating group object using entered date
> > such as name, picture etc...
> > this.controller.add(group);
> > }
> > }
>
> > static interface Controller {
> > Group add(Group group);
> > void delete(Group group);
> > }
>
> > }
>
> > but, i can't understand how it must work with async requests
>
> > Application that will use thiswidgetwill use async requests, so
> > methods in controller must have void as
> > a return type, but how can i notifywidgetthat group is created ?
> > Should i add such methods towidget
> > onAdd(Group newlyCreatedGroup) and
> > onDelete() , that controller implementor have to call after receiving
> > a response or maybe there is some
> > approach or pattern.
>
> > Thanks a lot
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