Question

萨拉姆

我正在尝试在我的项目中实现Primefaces PickList，而我受困于必须从源列表转移到目标的max元素：就我而言，我想从大约12种可能的选择列表中最多转移2种选择。

我的selectChoice.xhtml看起来像这样：

    <?xml version="1.0" encoding="UTF-8"?>
<!--
To change this template, choose Tools | Templates
and open the template in the editor.
-->
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:ui="http://java.sun.com/jsf/facelets"
      xmlns:h="http://java.sun.com/jsf/html"
      xmlns:f="http://java.sun.com/jsf/core"
      xmlns:p="http://primefaces.org/ui">
    <h:head>
        <h1>Liste des cadres</h1>
</h:head>
    <h:body>
    <ui:composition template="../resources/template.xhtml">
        <ui:define name="content">
        <h:form>
        <p:messages for="update"/>
        <p:pickList id="pickList"  value="#{etudiantController.pickFiliere}" var="filiere" itemLabel="#{filiere.intitule}" itemValue="#{filiere}" />




        </h:form>
   </ui:define>
    </ui:composition>
    </h:body>
</html>

我的托管bean是这样的：

 public List<Filiere> getListFiliere() {
        listFiliere = filiereService.findAll();
        return listFiliere;
    }

    public void setListFiliere(List<Filiere> listFiliere) {
        this.listFiliere = listFiliere;
    }


    public DualListModel<Filiere> getPickFiliere() {
        if (pickFiliere == null) {
            pickFiliere = new DualListModel<Filiere>();
            pickFiliere.setSource(getListFiliere());
        }
        return pickFiliere;
    }

    public void setPickFiliere(DualListModel<Filiere> pickFiliere) {
        this.pickFiliere = pickFiliere;
    }

    public void onTransfer(TransferEvent event) {
        StringBuilder builder = new StringBuilder();
        for(Object item : event.getItems()) {
            builder.append(((Filiere) item).getIntitule()).append("<br />");
        }

        FacesMessage msg = new FacesMessage();
        msg.setSeverity(FacesMessage.SEVERITY_INFO);
        msg.setSummary("Items Transferred");
        msg.setDetail(builder.toString());

        FacesContext.getCurrentInstance().addMessage(null, msg);
    } 

    public void onSelect(SelectEvent event) {
        FacesContext context = FacesContext.getCurrentInstance();
        context.addMessage(null, new FacesMessage(FacesMessage.SEVERITY_INFO, "Item Selected", event.getObject().toString()));
    }

    public void onUnselect(UnselectEvent event) {
        FacesContext context = FacesContext.getCurrentInstance();
        context.addMessage(null, new FacesMessage(FacesMessage.SEVERITY_INFO, "Item Unselected", event.getObject().toString()));
    }

    public void onReorder() {
        FacesContext context = FacesContext.getCurrentInstance();
        context.addMessage(null, new FacesMessage(FacesMessage.SEVERITY_INFO, "List Reordered", null));
    }

如何告诉我的PickList在进行2次传输后禁用元素传输。

感谢

////////////////// ************************** ////// ////////////////////////////////// 建议像melloware那样切换到SelectManyCheckbox，因为用户似乎更喜欢使用复选框，所以我的xhtml：

<p:selectManyCheckbox id="studentChoices" value="#{etudiantController.choixFLTmp}" layout="responsive" columns="3">
                <f:selectItems value="#{filiereController.allFilieres}" var="filiere" itemLabel="#{filiere.intitule}" itemValue="#{filiere}" />
                <f:validator validatorId="studentChoicesValidator" />
            </p:selectManyCheckbox>

          <p:message id="verifyMaxChoices" for="studentChoices"/>

i v根据此帖子的balusC个答案创建了一个验证器：How to validate the maximum amount of checked values of a selectManyCheckbox based on the current selection of a selectOneMenu?

我的验证者：

@FacesValidator("studentChoicesValidator")
public class StudentChoicesValidator implements Validator {
    @Override
    public void validate(FacesContext context, UIComponent component, Object value) throws ValidatorException {
        List<Filiere> choixFLTmp = (List<Filiere>) value;
        if (choixFLTmp.size() > 2) {
            throw new ValidatorException(new FacesMessage(
                FacesMessage.SEVERITY_ERROR, "Vous ne pouvez cochez plus que deux(2) choix !", null));
        }        
    }    
}

目前，该消息未显示在我的xhtml中，并且用户可以进行2次以上的检查。

我应该如何触发验证（在我看来，我一直认为验证会自动触发）

谢谢。

Primefaces PickList限制的转移元素数量

0 个答案: