8 Replies Latest reply on Jun 18, 2009 12:50 PM by fil78

a4j:support dynamic creation issue

fil78 Jun 11, 2009 10:27 AM

Hi folks,
I am trying to create my own tag using facelets. It consists of jsf input field, listbox and rich button. Besides that I would like to add a4j:support so - here is the code snippets:

public class MySwitcher extends javax.faces.component.html.HtmlInputText{

a4j support:

private HtmlAjaxSupport addAjaxSupport(FacesContext context){
 HtmlAjaxSupport ajaxSupport = new HtmlAjaxSupport();
 ajaxSupport.setEvent("onkeyup");
 ajaxSupport.setReRender(getClientId(context) + "," + LIST_BOX);
 ajaxSupport.setEventsQueue(eventsQueue);
 return ajaxSupport;
 }

inserting:

@Override
 public void encodeBegin(FacesContext context) throws IOException {
 ResponseWriter writer = context.getResponseWriter();
 writer.startElement("div", null);
 super.encodeBegin(context);
 this.getFacets().put("ajaxSupport", addAjaxSupport(context));
 }

Finally html code looks incomplete:

onkeyup="A4J.AJAX.Submit('_viewRoot','my_main_form',event,{'similarityGroupingId':'my_main_form:j_id115','parameters':{'my_main_form:j_id115':'my_main_form:j_id115'} ,'actionUrl':'/root/camps/location/mySwitcherTest.xhtml'} )"

but as I understand to reRender components 'affected' should presents.. What could be the problem?
Thanks.

1. Re: a4j:support dynamic creation issue

fil78 Jun 13, 2009 4:21 AM (in response to fil78)

Hey folks, does anybody know the answer? I do need help...
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2. Re: a4j:support dynamic creation issue

nbelaevski Jun 13, 2009 7:27 AM (in response to fil78)

Hi,

What is "affected" you are referring to?
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3. Re: a4j:support dynamic creation issue

fil78 Jun 13, 2009 11:11 AM (in response to fil78)

Hi,
I mean generated javascript code.. I checked correctly working code and found out that there is something like 'affected':['form_id:field1_id','form_id:fild2_id'] presents.. It is clear that all field id's to rerender listed there. I do not know why in my case it is not generated although I do ajaxSupport.setReRender(getClientId(context) + "," + LIST_BOX). Could you give me a hint? Thanks.
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4. Re: a4j:support dynamic creation issue

nbelaevski Jun 13, 2009 5:12 PM (in response to fil78)
Well, I'm checking out: http://livedemo.exadel.com/richfaces-demo/richfaces/commandLink.jsf?c=commandLink&tab=usage. Here is "onclick" handler code copied from Firebug:
A4J.AJAX.Submit('_viewRoot','j_id353',event,{'parameters':{'j_id353:j_id357':'j_id353:j_id357'} ,'actionUrl':'/richfaces\x2Ddemo/richfaces/commandLink.jsf','similarityGroupingId':'j_id353:j_id357'} );return false;
- no "affected" are present. Definitely, there was a case when "affected" was used, however I can't remember what case produced such code (maybe limitToList usage?). Also note that reRender list can be a dynamic list created on the server; so "affected" is not necessary on the client side at all.

Try assigning this:
AjaxRendererUtils.asSet("...ids to reRender")
as the value of "reRender" attribute.
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5. Re: a4j:support dynamic creation issue

fil78 Jun 15, 2009 8:06 AM (in response to fil78)

Thanks Nick, I checked the livedemo - it is true that no ids to rerender are mentioned in the generated AJAX.Submit code..
Regarding AjaxRendererUtils.asSet - it would not work..
Could it be the problem that I combined 3 components programmatically (HtmlSelectOneListbox and HtmlButton added after super.encodeEnd) and inherited from javax.faces.component.html.HtmlInputText? or
Could it be the problem that I am trying to reRender component itself?
but everytime when onkeyup fires encodeBegin and encodeEnd properly invokes... and no changes on UI..((
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6. Re: a4j:support dynamic creation issue

fil78 Jun 17, 2009 10:20 AM (in response to fil78)

Hi,
I fixed this issue - I just placed my component on the a4j panel.. But now I've got another question. I am implementing something like a search button and I want just to reRender part of a page without any action invoking. So I am trying to do something like:

 HtmlAjaxCommandButton searchButton = new HtmlAjaxCommandButton();
 searchButton.setId("ajButton");
 searchButton.setStyleClass(STYLE_SEARCH_BUTTON);
 String action = "";
 ExpressionFactory factory = context.getApplication().getExpressionFactory();
 MethodExpression methodExpression = factory.createMethodExpression(context.getELContext(), action, null, new Class<?>[0]);
 searchButton.setActionExpression(methodExpression);
 searchButton.setImage("/images/searchFieldBtn.gif");
 searchButton.setReRender(AjaxRendererUtils.asSet(getClientId(context) + "," + LIST_BOX + "," + getReRender()));
 searchButton.setEventsQueue(eventsQueue);
 searchButton.setActionExpression(actionExpression);
 searchButton.encodeAll(context);

But it generates an exception.. If I put:

String action = "dummyString";

It invokes something like an ajax request because a4j status triggers, but it does not reRender the page at all. what is the best practice just to reRender a piece of page without invoking actions? What am I doing wrong?

7. Re: a4j:support dynamic creation issue

fil78 Jun 18, 2009 10:26 AM (in response to fil78)

Hey folks, do not be shy to answer, please..
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8. Re: a4j:support dynamic creation issue

fil78 Jun 18, 2009 12:50 PM (in response to fil78)
All was fixed by:

UIComponent form = getCurrentForm(this); if (form != null) { form.getChildren().add(searchButton); }

Thanks..
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