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POHow to trigger the change of a h:inputHidden by JavaScript
 

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  1. POHow to trigger the change of a h:inputHidden by JavaScript
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    <p>I have to implement a three state checkbox as a composite component with ajax features. This is what I have so far:</p> <pre><code>&lt;ui:composition xmlns="http://www.w3.org/1999/xhtml" xmlns:h="http://java.sun.com/jsf/html" xmlns:f="http://java.sun.com/jsf/core" xmlns:ui="http://java.sun.com/jsf/facelets" xmlns:cc="http://java.sun.com/jsf/composite" xmlns:c="http://java.sun.com/jsp/jstl/core" xmlns:fn="http://java.sun.com/jsp/jstl/functions" xmlns:a4j="http://richfaces.org/a4j" xmlns:rich="http://richfaces.org/rich"&gt; &lt;cc:interface&gt; &lt;cc:attribute name="id" /&gt;&lt;!-- necessary? --&gt; &lt;cc:attribute name="value" required="false" /&gt; &lt;cc:clientBehavior name="change" event="change" targets="value" /&gt; &lt;/cc:interface&gt; &lt;cc:implementation&gt; &lt;div style="float: left;"&gt; &lt;h:outputStylesheet library="default" name="css/checkbox.css" target="head" /&gt; &lt;h:outputScript library="default" name="js/checkbox.js" target="head" /&gt; &lt;div id="#{cc.clientId}" class="cc-checkbox cc-checkbox-value#{cc.attrs.value}" style="width: 14px; height: 14px;" onclick="checkboxToggleControl('#{cc.clientId}')"&gt;&lt;/div&gt; &lt;h:inputHidden id="value" value="#{cc.attrs.value}" /&gt; &lt;/div&gt; &lt;/cc:implementation&gt; &lt;/ui:composition&gt; </code></pre> <p>As you see (or not, because I didn't include the JS as it's not the problem), a litte JavaScript replaces the classes which the user sees as a three state checkbox (<code>null</code>, <code>true</code>, <code>false</code>). The current value is stored in <code>&lt;h:inputHidden&gt;</code> by JavaScript.</p> <p>I would like to be able to register an ajax event when using the control in order to be able to store the value on the server. The component is located inside a <code>&lt;rich:extendedDataTable&gt;</code>. Every time the user clicks on it, the value should be stored "immediately" in the database. Using <code>clientBehaviour</code> with <code>inputHidden</code> doesn't work, as it doesn't support ajax.</p> <ol> <li><p>Is it possible to ajaxify <code>&lt;h:inputHidden&gt;</code> by using <code>&lt;h:inputText&gt;</code>? What are the drawbacks? (I would have to deal with validation, wouldn't I?)</p></li> <li><p>Is there another way to implement it as a composite component?</p></li> <li><p>Or, would it be "easier" to write a "real" component?</p></li> </ol> <p>I'm not using <code>&lt;h:selectBooleanCheckbox&gt;</code> because it cannot be styled by CSS in the desired way and also because it doesn't support a three-state.</p>
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    1. COIf you are using Primefaces you can take a look at their extension library http://fractalsoft.net/primeext-showcase-mojarra/views/triStateCheckbox.jsf , you can also get some inspiration from their implementation...
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