a4j:support and partial page updating

[artgonch]

Hello!

I'm new in richafces and I need help in this problem.

1. I have the following elements on page:

<f:view>

    <a4j:form>

    <h:selectOneMenu style="width:100px" value="#{userSessionBean.simpleDictPreffix}" id="dict-preffix"

                     valueChangeListener="#{userSessionBean.dictPreffixListValueChanged}">

        <f:selectItems value="#{applicationData.searchList}"/>

        <a4j:support event="onchange" ajaxSingle="true" action="#{userSessionBean.changeDictionaryAction}" reRender="showDictBtn"/>

    </h:selectOneMenu>

    ...

<%-- AND -- %>

   ...

    <a4j:commandButton value="..." title="#{header_var.dict_btn_tip}"

                       action="#{userSessionBean.showDictAction}"

                       reRender="mpViewSearchValues"

                       rendered="#{userSessionBean.showDictBtnVisible}"

                       id="showDictBtn"/>

    .....

    </a4j:form>

</f:view>

2. userSessionBean.changeDictionaryAction is:

        public String changeDictionaryAction() {

            ExternalContext ec = FacesContext.getCurrentInstance().getExternalContext();

            List<SearchItemDescriptor> searchItemList = (List<SearchItemDescriptor>) ec.getApplicationMap().get("search-list");

            for (SearchItemDescriptor sid : searchItemList) {

                String s = sid.getPreffix();

                if (s.equals(simpleDictPreffix) == true) {

                    if (sid.getMenu() != null) {

                        showDictBtnVisible = true;

                        return null;

                    }

                }

            }

            showDictBtnVisible = false;

            return null;

        }

But when showDictBtnVisible is true, the button showDictBtn is not appear.

What is wrong? I use RichFaces 3.3.2.

Thanks, to all.

[sivaprasad9394]

Hi,

If you are able to set the value to true in the backend  function ..please foloww the step and try,

<a4j:support event="onchange" ajaxSingle="true" action="#{userSessionBean.changeDictionaryAction}" reRender="displayBtnPanel,showDictBtn"/>

_____________

<a4j:outputPanel id="displayBtnPanel">

                <a4j:region   rendered="#{userSessionBean.showDictBtnVisible == true}">    

  <a4j:commandButton value="..." title="#{header_var.dict_btn_tip}"

                       action="#{userSessionBean.showDictAction}"

                       reRender="mpViewSearchValues"

                       rendered="#{userSessionBean.showDictBtnVisible}"

                       id="showDictBtn"/>

</a4j:region>

                </a4j:outputPanel>  

[artgonch]

Thank you, but unfortunately this has effect

[ivan_ra]

showDictBtn initially not present on form, so it cant be rerendered.

You have to rerender already existing component, like this:

    <h:selectOneMenu style="width:100px" value="#{userSessionBean.simpleDictPreffix}" id="dict-preffix"

                     valueChangeListener="#{userSessionBean.dictPreffixListValueChanged}">

        <f:selectItems value="#{applicationData.searchList}"/>

        <a4j:support event="onchange" ajaxSingle="true" action="#{userSessionBean.changeDictionaryAction}" reRender="dictBtnPanel"/>

    </h:selectOneMenu>

...

  <h:panelGroup id="dictBtnPanel">

    <a4j:commandButton value="..." title="#{header_var.dict_btn_tip}"

                       action="#{userSessionBean.showDictAction}"

                       reRender="mpViewSearchValues"

                       rendered="#{userSessionBean.showDictBtnVisible}"

                       id="showDictBtn"/>

  </h:panelGroup>