java Primefaces 中的视觉“忙”指示
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Visual "busy" indication in Primefaces
提问by Dmitrii Pisarenko
I have a Primefaces-based application, in which there are some lengthy operations.
我有一个基于 Primefaces 的应用程序，其中有一些冗长的操作。
When such operation is being executed, I want to indicate this somehow (like displaying an hourglass or a message, which appears at the center of the screen).
当执行这样的操作时，我想以某种方式表明这一点（比如显示一个沙漏或一条消息，它出现在屏幕中央）。
What is the easiest way to do this in Primefaces/JSF?
在 Primefaces/JSF 中执行此操作的最简单方法是什么？
回答by rdcrng
I'd recommend doing it with <p:blockUI>. Here's an example:
我建议用<p:blockUI>. 下面是一个例子：
<h:form>
<p:panel id="content" >
...
<p:commandButton id="longOperation" value="Process" />
</p:panel>
<p:blockUI block="content" trigger="longOperation">
<p>Here you can customize what appears as the overlay over the blocked content.</p>
<p:graphicImage value="/images/ajax-loader.gif"/>
</p:blockUI>
</h:form>
Take a look at http://www.primefaces.org/showcase/ui/blockUI.jsffor more info.
