Fwd: string-binding problem

> From: Simon Robins <[email protected]>
> Date: Wed Jan 15, 2003  7:12:13  pm Europe/London
> To: Christian Sell <[email protected]>
> Subject: Re: [Tapestry-developer] string-binding problem
>
> You need to do this in the action that responds to the select 
> component when the locale is changed rather than allowing the page to 
> re-render itself.
>
> Read the Page Localisation section of Chapter 4 of the Developers 
> Guide for an explanation of why.
>
> Regards,
>
> Simon
>
> On Wednesday, January 15, 2003, at 05:53  pm, Christian Sell wrote:
>
>> erm, sorry, but I am not with you. Do you suggest this as a 
>> workaround for the (otherwise quite simple) thing I am doing? And 
>> where do you suggest this code to be located?
>>
>> It still seems to me that this is more a case for the bugtracker than 
>> for the FAQ. Correct me if I am wrong..
>>
>>
>> Simon Robins wrote:
>>> Maybe this problem should be in the FAQ.
>>> You need to do something like this:
>>> IEngineService pageService = 
>>> cycle.getEngine().getService(IEngine.PAGE_SERVICE);
>>> Gesture gesture = pageService().buildGesture(cycle, null, new 
>>> String[] { getPage().getName() } );
>>> throw new RedirectException(gesture.getAbsoluteURL());
>>> Regards,
>>> Simon
>>> On Wednesday, January 15, 2003, at 05:10  pm, Christian Sell wrote:
>>>> could somebody confirm that the issue described below is a bug? 
>>>> Should I enter it into the bug tracker?
>>>>
>>>> As it turns out, the only way to get around this is to change the 
>>>> application design to be like the workbench demo, where after 
>>>> changing the locale the user is directed to another page. If 
>>>> instead you want to redisplay the same page, it will not show the 
>>>> new localization.
>>>>
>>>> regards
>>>>
>>>> Christian Sell wrote:
>>>>
>>>>> to answer my question regarding a workaround:
>>>>> I tried this:
>>>>>         <binding name="value" expression='getString("message")'/>
>>>>> this forced the binding to be evaluated every time - BUT:
>>>>> The string table for the component is created lazily based on the 
>>>>> current locale and cached afterward. It is NOT recreated if the 
>>>>> locale changes, and therefore wrong if the same component is 
>>>>> reused in a subsequent request. See method 
>>>>> AbstractComponent.getString(String key).
>>>>> it seems I cannot proceed without hacking tapestry - or 
>>>>> redesigning my app
>>>>> Christian
>>>>> Christian Sell wrote:
>>>>>
>>>>>> Hello,
>>>>>>
>>>>>> On one of my pages, I am using an Insert component with a 
>>>>>> string-binding parameter. On the same page, I have a form with a 
>>>>>> Select component which allows setting the Locale. After setting 
>>>>>> the locale, the same page is redisplayed.
>>>>>>
>>>>>> Now it turns out that when the locale is set, the Insert element 
>>>>>> does not change its appearance according to the new locale. Only 
>>>>>> after visiting another page and returning to the previous one, 
>>>>>> the new localized string is shown.
>>>>>>
>>>>>> I went to the source code and discovered that string-bindings are 
>>>>>> only evaluated once when the component is first created - in 
>>>>>> method ParameterManager.setup(IRequestCycle cycle). It seems that 
>>>>>> when the same page is redisplayed after changing the locale, this 
>>>>>> does not happen.
>>>>>>
>>>>>> I consider this a bug. My suggestion is that 
>>>>>> StringBinding.isInvariant() should return false, and not true as 
>>>>>> is currently the case.
>>>>>>
>>>>>> objections? Or is there a workaround?
>>>>>>
>>>>>> Christian
>>>>>>
>>>>>>
>>>>>>
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