By Valter Silva

2012-01-24 14:46:07 8 Comments

I have to stream a webcam video, so I use ustream to do that, which generate a flash embed code for me, and I have a button to turn off/on the light, but when I press the button it refresh the whole page and so the flash component.

There's some way to not refresh the page and still send to command ? Well for now it's this way:

        <h:form id="form_supervisory">
                    <iframe width="480" height="296" src="" scrolling="no" frameborder="0" style="border: 0px none transparent;">    </iframe>
                    <h:commandButton value="Lâmpada" action="#{supervisoryc.invertBo}" />
                    <h:graphicImage value="#{supervisoryc.imageBo}" />


@BalusC 2012-01-24 14:49:29

Make use of Ajax. It's a matter of nesting <f:ajax> inside the command button of interest.

<h:commandButton ...>
    <f:ajax execute="@form" render="@none" />

Particularly the render="@none" (which is the default value anyway, you could just omit the attribute altogether) will instruct JSF to re-render just nothing after the submit. If you intend to re-render only a specific component instead of the whole page, then you could also specify the ID of that specific component in render attribute.

<h:commandButton ...>
    <f:ajax execute="@form" render="result" />
<h:panelGroup id="result">...</h:panelGroup>

See also:

@eskalera 2014-05-12 17:34:38

Thanks @BalusC. I thought <h:commandButton ajax="true"> was default though. But it doesnt' work without ajax tag. Any idea why?

@BalusC 2014-05-12 17:41:56

@eskalera: you're confusing standard JSF with PrimeFaces.

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