[英]How to enable/disable specific item in selectManyCheckbox on ajax keyUp
[英]How to enable/disable item in selecManyCheckbox based on flag
在禁用和启用jsf页面中的selectManyCheckbox
组件中的项目时,我需要您的帮助。 首先,selectManyCheckbox组件显示三个复选框(贷款-健康-转移)。 该列表将从具有代码的Bean中填充:
private List<hrCertificate> hrCertificatesList = new ArrayList<hrCertificate>();
//Getter and Setter
Private String loanFlag="";
@PostConstruct
public void init() {
this.hrCertificatesList.add(new hrCertificate(("Loan"), "LC"));
this.hrCertificatesList.add(new hrCertificate(("Health"), "HI"));
this.hrCertificatesList.add(new hrCertificate(("Trasnfer"), "TE"));
}
在同一个bean中,我将运行一个SQL语句,该语句将返回Yes或No,并将该值添加到loanFlag
变量中。因此,如果flag =“ Y”,则需要启用贷款复选框,以便用户可以选择它,否则我需要从selectManyCheckbox
禁用它。 问题是我在应用逻辑来禁用和启用selectManyCheckbox
项时遇到困难,我在上面的代码中列出并始终启用它们。
selectManyChexkbox的代码:
<p:selectManyCheckbox id="hrCertificates" value="#{user.selectedHRCertificates}" layout="pageDirectio>
<f:selectItems value="#{user.hrCertificatesList}"
var="hrCertificate" itemLabel="#{hrCertificate.hrCertificateName}"
itemValue="#{hrCertificate.hrCertificateCode}"/>
</p:selectManyCheckbox>
那么如何运用逻辑
您可以编辑hrCertificate类以添加disabled
布尔字段吗? 如果是,则可以将itemDisabled="#{hrCerticate.disabled}"
到您的f:selectItems
,这应该是最简单的解决方案。
另一种选择是使用Map<hrCertificate, Boolean>
代替List<hrCertificate>
。
private Map<hrCertificate, Boolean> hrCertificatesMap = new HashMap<hrCertificate, Boolean>();
@PostConstruct
public void init() {
hrCertificatesMap.put(new hrCertificate(("Loan"), "LC"), null);
hrCertificatesMap.put(new hrCertificate(("Health"), "HI"), null);
hrCertificatesMap.put(new hrCertificate(("Trasnfer"), "TE"), null);
}
// Then when you're done with your SQL query, update your Map to add the corresponding boolean values...
.xhtml
<p:selectManyCheckbox id="hrCertificates" value="#{user.selectedHRCertificates}" layout="pageDirectio>
<f:selectItems value="#{user.hrCertificatesMap.keySet().toArray()}" var="hrCertificate" itemLabel="#{hrCertificate.hrCertificateName}" itemValue="#{hrCertificate.hrCertificateCode}" itemDisabled="#{user.hrCertificatesMap.get(hrCertificate)}" />
</p:selectManyCheckbox>
首先,请注意,一个属性不会取消支持它的实际属性,您只需要一个吸气剂即可。 因此,您可以:
public class MyBean implements Serializable {
private FilterEnum certFilter = FilterEnum.NO_FILTER;
private List<Certificate> certificates;
... // including certificates initialization.
public FilterEnum getCertFilter() {
return this.certFilter;
}
public void setCertFilter(FilterEnum certFilter) {
this.certFilter = certFilter;
}
public List<Certificate> getCertificates() {
// I am sure there is a cooler way to do the same with streams in Java 8
ArrayList<Certificate> returnValue = new ArrayList<>();
for (Certificate certificate : this.certificates) {
switch (this.certFilter) {
case FilterEnum.NO_FILTER:
returnValue.add(certificate);
break;
case FilterEnum.ONLY_YES:
if (certificate.isLoan) {
returnValue.add(certificate);
}
break;
case FilterEnum.ONLY_NO:
if (!certificate.isLoan) {
returnValue.add(certificate);
}
break;
}
}
return returnValue;
}
}
如果您坚持要在“ .xhtml”中进行过滤,则可以将JSTL中的c:forEach
与<f:selectItem>
(请注意item ,而不是items )结合使用,但这会使您的xhtml更加复杂,并可能导致问题,如果您想与它一起使用Ajax。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.