Can you explain what do you mean by " but iframe transparency issues meant
access to underlying
form component."?
I am using option 2 to avoid UI state corruption and didn't have any
problems with it.
Seldon, Richard wrote:
>
>
> Experiencing a wicket problem to do with UI state corruption when using
> ajax
> tabbed panel. When the ajax links are rapidly clicked in succession
> various
> validation errors appear relating to panels that are hidden, form
> component
> drop downs lose their display UI values and UI state basically becomes
> "v.confused". Have not observed this behavior elsewhere but somehow it
> seems
> like the ajax requests are not stacking correctly or at least are losing
> synch with the UI rerendering somehow.
>
> Below are all the steps (in brevity) so far attempted and some unanswered
> questions I still have:-
>
> (1) Tried IAjaxIndicatorAware on individual form components and overridden
> tabbed panel links. Used this in conjunction with a server side request
> throttler. Basically wrote a timer class that intercepts onsubmit
> requests
> and rejects (returns without processing further) on any entered with given
> 2
> second interval using standard Java api class implementations. This
> approach does actually work but doesn't explain why we're having this
> problem in first place?
>
> (2) Tried a DIV interceptor approach hooking into
> Wicket.Ajax.registerPreCallHandler, postcall, and failure. The idea was to
> cover the entire screen with a transparent div whilst asynch call being
> made - however, problematic using IE 6 but works with firefox.
> Essentially,
> seems IE deals with windowed and windowless components and certain html
> form components are windowed such as select. z-indexes are not respected
> between the two types and therefore setting div z-index higher than
> select
> z-index doesn't work. tried workaround using an iframe (which covers both
> z-indexes in IE6) but iframe transparency issues meant access to
> underlying
> form component.
>
> (3) Looked at wicket-ajax.js - was interested with configuration of the
> channels settings - but unsure how to get an appropriate configuration
> fix.
> There is an indicator between setting which gets read by reading out of
> a
> regex a character value of either 'd' or 's' where from what i can see 's'
> ensures requests are stacked. Found some help in an older newsgroup which
> mentions that "{wicket has "ajax channels" with different channel modes
> such
> as queue/disregard. that way you can disable certain groups of components
> only by assigning them to the same ajax channel.}" Looking at the wicket
> java api i couldn't manage to find any handle to setting this flag up. Is
> this a direct wicket-ajax.js edit and if so then my question would be
> "What
> is an "elegant" way to override the default to use 'd'?"
>
> (4) Finally, switched the asynch flag to "false" by editing wicket-ajax.js
> directly (this.type in request prototype class). This resolved the
> original
> problem but uncertain what the consequences of doing this are. Is this
> safe
> and is there any Java api accessible means to do this? In firefox by
> inspecting ajax responses via an ajax plugin, it seemed to indicate ajax
> requests yet the page is flickering on rerender much like a full page
> resubmission would. Does ajax submission still work or is it the main UI
> thread that now handles form submissions?
>
>
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