From: Antonio Gallardo [mailto:[EMAIL PROTECTED]
> Reinhard Poetz dijo:
> > Sorry, I don't like this client-side approach.
> > We have to find something better because sometimes the
> 'presentation
> > state' of a widget can depend on the 'application state'.
> Flowscript
> > as controller should have access to both.
>
> Hi Reinhard:
>
> How manage a dynamic "show/hide a control" in a page without
> doing a round-trip to the server?
Maybe I haven't understood Jeremy's requirements correctly but I don't
think the widget should change because a widget changed client-side
(without server interaction).
> Based on some observation while no-tech oriented users filled
> HTML forms. It makes clear to me that they don't liked the
> round-trip to the server. It was confusing to him! It is
> clear a non-conventional interface. Also it waste time, no
> matter how fast the connection (including the server) are.
> The observation was related to calculated widgets.
I made similar observations too. This means to me that we have to offer
a clear client-side Javascript interface in order to control the
widgets.
+1 from me to give every widget a unique ID.
BTW, you suggested before
function toggleControl(id) {
var element = document.getElementById(id);
with (element.style) {
if (display == "none") {
display = ""
} else{
display = "none"
}
}
}
I think in this particular case you don't even need the id because pass
'this' to the toogleControl function which is a reference to the object.
function toggleControl(element) {
with (element.style) {
if (display == "none") {
display = ""
} else{
display = "none"
}
}
}
> I think this is a similar case, because the show/hide control
> is just a rendering page issue. Of course, you can add add
> additional parameters to reflect the current "application
> state" and let the page have the right behavior. If we
> suspect that it can be a security concerns, there is a gold rule:
>
> "Anything returned from the client must the checked again,
> when the control return to the Flow (serversided)."
Of course, never trust the client ;-)
> Best Regards,
>
> Antonio Gallardo.
>
> P.S: I like this kind of discussion, because I will learn more! :-)
--
Reinhard
