Active Index of tabview not getting updated automatically

Question

Active Index is not getting updated automatically. ReaD in a few posts that by placing the tabView on a form it works. Or by including <p:ajax event="tabChange"/> in the tabview it works. But nothing seems to work

xhtml

Sample 1 : automatic updates

    <p:tabView id="categoryTabView" var="promoArticle" value="#{promotionDetailBean.artDTOs}"  activeIndex="#{promotionDetailBean.activeTabIndex}">
            <p:tab id="categoriesTab" title="#{promoArticle.categoryName}">
                <p:dataTable id="promotionDetail_dataTable" var="articlePromo" value="#{promoArticle.artVO}" selection="#{promotionDetailBean.selectedArt}" rowIndexVar="rowIndex">
                    <p:column id="select" selectionMode="multiple" />

                    <p:column id="barCode">
                        <h:inputText id="barCodeInputTxt" value="#{articlePromo.barCode}"
                        styleClass="inputTextStyle" onchange="onSuggestedValueChange('categoryTabView',#{promotionDetailBean.activeTabIndex}, 'promotionDetail_dataTable',#{rowIndex},'originalCostInputTxt')" />
                    </p:column>
                </p:dataTable>
            </p:tab>
        </p:tabView>

Sample 2: Updating on tabChange event

  <h:form id="form">
    <p:growl id="growlm" showDetail="true" />  

            <p:tabView id="categoryTabView" var="promoArticle" value="#{promotionDetailBean.artDTOs}"  >
               <p:ajax event="tabChange" listener="#{promotionDetailBean.tabChanged}"  update=":growlm" />
                    <p:tab id="categoriesTab" title="#{promoArticle.categoryName}">
                        <p:dataTable id="promotionDetail_dataTable" var="articlePromo" value="#{promoArticle.artVO}" selection="#{promotionDetailBean.selectedArt}" rowIndexVar="rowIndex">
                            <p:column id="select" selectionMode="multiple" />

                            <p:column id="barCode">
                                <h:inputText id="barCodeInputTxt" value="#{articlePromo.barCode}"
                                styleClass="inputTextStyle" onchange="onSuggestedValueChange('categoryTabView',#{promotionDetailBean.activeTabIndex}, 'promotionDetail_dataTable',#{rowIndex},'originalCostInputTxt')" />
                            </p:column>
                        </p:dataTable>
                    </p:tab>
                </p:tabView>

I need to identify the cell on "onChange " event. But the activeIndex is always 0, the initialized value. The event doesn't get call.

bean

private Integer activeTabIndex = 0;
public Integer getActiveTabIndex() {
   return activeTabIndex;
}
public void setActiveTabIndex(Integer activeTabIndex) {
    this.activeTabIndex = activeTabIndex;
}

bean

public void tabChanged(TabChangeEvent event){
        TabView tv = (TabView) event.getComponent(); 
        this.activeTabIndex = tv.getActiveIndex();
    }

But the event is not getting trigerred. Nor getting updated automatically.

What could be the probable issues ?

Thanks, Shikha

Answer 1

The following worked for me:

XHTML:

<p:tabView id="categoryTabView" var="promoArticle"
        value="#{promotionDetailManagedBean.articuloPromocionDTOs}" dynamic="true">
    <p:ajax event="tabChange" listener="#{promotionDetailManagedBean.onTabChange}" />
    <p:tab> ... </p:tab>
</p:tabView>

Bean:

public final void onTabChange(final TabChangeEvent event) {
    TabView tv = (TabView) event.getComponent();
    this.activeTabIndex = tv.getActiveIndex();
}

Answer 2

This works for me when the tab is not contained inside a form but every tab contains its own one:

1. Add a listener to tab change event to your tabView component:

   <p:ajax event="tabChange" listener="#{userBean.onTabChange}" />

2. Getting the active index from the underlying TabView component doesn't seem to be working. However, in the event, the new selected tab is updated correctly so we can getthe index by searching in the children components of the TabView:

    public void onTabChange(TabChangeEvent event) 
    {   
        TabView tabView = (TabView) event.getComponent();
        activeTab = tabView.getChildren().indexOf(event.getTab());
    }

I hope this works for you too