Hi Francois,

Okay, I see what you're saying now.  Yes, that makes sense - I can just 
hardcode those values and not bother overriding other methods.  It loses the 
flexibility on setting the max value in the constructor, but I don't actually 
need that in my situation and I agree that it is a good compromise!  And 
eventually, the resource replacement feature after upgrading to wicket 6 will 
be the ideal solution.  Thanks for your patience and the help!



From: Francois Meillet [via Apache Wicket] 
Sent: Monday, February 18, 2013 6:02 PM
To: evan
Subject: Re: how to modify internal JavascriptResourceReference packaged with 


final ResourceReference YOURJS = new JavaScriptResourceReference( 
Yourclass.class, "YourMultiFileUploadField.js"); 
final int max = 3; 
MultiFileUploadField x = new MultiFileUploadField("yourid"){ 

        public void renderHead(IHeaderResponse response) { 
MultiSelector('" + getInputName() +   "', document.getElementById('container'), 
" + max + ",'" +    getString("org.apache.wicket.mfu.delete") + 

I think it's a good compromise 

François Meillet 
Formation Wicket - Développement Wicket 

Le 18 févr. 2013 à 19:26, evan <[hidden email]> a écrit : 

>> This is improved in Wicket 6. 
>> You can use 
>> org.apache.wicket.protocol.http.WebApplication#addResourceReplacement for 
>> exactly this use case. 
>> See http://wicketinaction.com/2012/07/wicket-6-resource-management/
>> You are recommended to upgrade your application. 
> Nice - the addResourceReplacement is great.  Thanks Martin - I will 
> try to upgrade the application soon.  In the meantime, I will override 
> the necessary methods in the class, as per Francois' suggestion. 
> if the question is how to modify internal JavascriptResourceReference 
> packaged with component 
>> I will just override 
>>        @Override 
>>        public void renderHead(IHeaderResponse response) 
>>        { 
>>                // initialize the javascript library 
>>                response.render(JavaScriptHeaderItem.forReference(JS)); 
>>                response.render(OnDomReadyHeaderItem.forScript("new 
>> MultiSelector('" + getInputName() + 
>>                        "', document.getElementById('" + 
>> container.getMarkupId() + "'), " + max + ",'" + 
>>                        getString("org.apache.wicket.mfu.delete") + 
>> "').addElement(document.getElementById('" + 
>>                        upload.getMarkupId() + "'));")); 
>>        } 
>> Max is the max number of files a user can upload. 
>> container.getMarkupId() is container 
>> upload.getMarkupId() is upload 
> Francois, I'm sorry to belabor this question - but I just want to make 
> sure I'm not missing something still.  I think I understand what to do 
> now and it works - I was just pointing out that if I extend the 
> MultiFileUploadField class, it is not enough to only override that one 
> method, because the reference to those 3 variables in my overridden 
> method would be trying to reference private members from the super 
> class and won't be allowed.  So, I just need to also create a new 
> version of the variables in the extended class, and override the 
> constructors in which they are defined, and any other methods in which 
> they are referenced.  Were you saying in your last response that this 
> is not necessary, for some reason that I'm still missing?  In any 
> case, doing it this way works and is fine as a temporary solution 
> until I upgrade and can use the addResourceReplacement approach. 
> Thanks again for all the help! 
> Best, 
> -Evan 
> -- 
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François Meillet 
Formation Wicket - Développement Wicket 



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