I recommend you to use wicket-1.2.6. This version is better and have some
useful fixes, including ajax related. Regarding the transparency issue, I
recommend to use the http://malsup.com/jquery/block/ jquery.block plugin ,
or at least take it as an example for your own js implementation. I have my
own light version of this plugin..
Seldon, Richard wrote:
>
>
> Sure Alex, what i meant was that in order to get IFRAME to be transparent
> i
> tried a combination of setting allowtransparency="true" as an attribute on
> the IFRAME element and then in css class definition for the IFRAME put in:
> filter:"progid:DXImageTransform.Microsoft.Alpha(style=0, opacity=0)";
> Alpha
> handles opacity allowing effectively transparency for the underlying page
> content (didn't work with select form component though).
>
> Note IE worked for textfields (input type="text") html form components
> with
> these settings. it was the select that failed. Below is an example snippet
> code with z-indexes to illustrate this point. the z-index is a constant
> in
> the example:
>
> <HTML>
> <HEAD>
> <TITLE>Z-Index</TITLE>
> <script>
> function setindex()
> {
> div1.style.zIndex=text1.value;
> select1.style.zIndex=text2.value;
> getindexes();
> }
>
> function getindexes(){
>
> text1.value=div1.style.zIndex;
> text2.value=select1.style.zIndex;
> text3.value=5;
> }
> </script>
> </HEAD>
> <BODY onload="getindexes()">
>
> Div
> <input type="text" value="" id=text1 name=text1 ><p>
>
> Select
> <input type="text" value="" id=text2 name=text2><p>
>
> IFrame
> <input type="text" value="" id=text3 name=text3><p>
> <input type="button" value="Set Z-Index" id=button1 name=button1
> onclick="setindex()">
> <DIV id=div1 name=div1
> style="width:200;height:200;background-color:lightblue;
> position:absolute;left:350;top:250;z-index:">DIV</DIV>
> <select id=select1 name=select1
> style=";position:absolute;left:300;top:400;width=500;z-index:"
> size=1 >
> <option>Option1
> <option>Option2
> <option>Option3
> </select>
> <IFRAME id=iframe1 name=iframe1 src="" scroll=none
> style="width:100;height:115;position:absolute;
> left:400;top:300;border-color:green;z-index:5;"></iframe>
> </BODY>
> </HTML>
>
>
>
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] Behalf Of Alex
> Objelean
> Sent: 14 June 2007 20:43
> To: wicket-user@lists.sourceforge.net
> Subject: Re: [Wicket-user] AJAX causing UI state corruption....
>
>
>
> 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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