禁用下拉菜单上的复选框

Question

在xhtml文件中的数据表中有一个下拉框和一个复选框。下拉菜单有L, C, UV和其他各种选择。例如，当选中L时，我希望禁用复选框。

下面是下拉框和复选框的相关xhtml代码:

<r2i4:selectForClass itemClass="VehicleGenericType" value="#{vc.vehicleGenericType}" rendered="#{vc.crudState == null || vc.crudState == 'CREATE'}"
    valueChangedListener="#{vehicleCategory.vehicleDropdownChange">
    <f:selectItems value="#{vehicleCategory.vehicleChanged}" />
    <p:ajax />
</r2i4:selectForClass>
<f:facet name="input">
    <p:selectBooleanCheckbox id="departmental" value="#{vc.isDepartmental}" rendered="#{vc.crudState == null || vc.crudState == 'CREATE'}" 
    disabled="#{vehicleCategory.vehicleChanged eq 'L'}"/>
</f:facet>

在bean中，我有以下代码:

public void vehicleDropdownChange(ValueChangeEvent e) {
        if(e.getNewValue().equals("L")) {
        }
}

有没有人知道我怎么才能做到这一点?

谢谢

Answer 1

试试下面的代码:

<r2i4:selectForClass itemClass="VehicleGenericType" value="#{vc.vehicleGenericType}" rendered="#{vc.crudState == null || vc.crudState == 'CREATE'}">
    <f:selectItems value="#{vehicleCategory.vehicleChanged}" />
    <p:ajax event="change" update="departmental" listener="#{vehicleCategory.vehicleDropdownChange} />
</r2i4:selectForClass>
<f:facet name="input">
    <p:selectBooleanCheckbox id="departmental" value="#{vc.isDepartmental}" rendered="#{vc.crudState == null || vc.crudState == 'CREATE'}" 
    disabled="#{vehicleCategory.disable}"/>
</f:facet>

public void vehicleDropdownChange(ValueChangeEvent e) {
        if ( .. ) { disable = true }
}

它应该在这里工作。