Dashboard Data Selector Value for HTML Button

tmontano

<p style="color:rgb(40,40,40);font-family:'Source Sans Pro', sans-serif;">Hello,</p>
<p style="color:rgb(40,40,40);font-family:'Source Sans Pro', sans-serif;"> </p>
<p style="color:rgb(40,40,40);font-family:'Source Sans Pro', sans-serif;">I have a working dashboard with a few charts that are working with a data object with a data selector that filters documents based on file extension. I would like to implement a button that makes an ajax call to a web-service that updates a database with the extension selected. I have tried numerous things: blank report gadget with an html button that accesses a data binding, a parameter gadget, I also tried linking the data selector gadget to my report but I cannot get the list of fields to showup. What would be the best way to create a button that can access the data selector selection and make an ajax request to a web-service?</p>
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shiloam

<p><span style="font-size:12px;"><span style="font-family:arial, helvetica, sans-serif;">I think the easiest way to do what you want would be to choose one of the linked charts/visualizations, go to the 'link' menu, and customize the onChange event. The method looks like this:</span></span></p>
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<p><span style="font-size:12px;"><span style="font-family:arial, helvetica, sans-serif;"><span style="color:rgb(0,0,0);">function onChange ( event, publisher, data, thisGadget ){}</span></span></span></p>
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<p><span style="font-size:12px;"><span style="font-family:arial, helvetica, sans-serif;"><span>The value selected by the selector you want to capture is in the 'data' variable. Capture it and populate a global Javascript page variable.</span></span></span></p>
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<p><span style="font-size:12px;"><span style="font-family:arial, helvetica, sans-serif;">BIRT Dashboards support the use of custom Google gadgets. Put your button in one and call a Javascript function in the onClick event of the button which utilizes the page variable that you captured from the onChange method of the customized link. </span></span></p>
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<p>A custom Google gadget btw is really just an XML file that you can include using the 'import gadget' option from the 'extras' section. A skeleton Google gadget with nothing but a div and an alert looks like this:</p>
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<div><?xml version="1.0" encoding="UTF-8"?></div>
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<div><Module></div>
<div><ModulePrefs title="Sample PubSub Subscriber"</div>
<div>             height="250"></div>
<div><Require feature="pubsub"/></div>
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<div><![CDATA[</div>
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<div><script></div>
<div>alert("I'm a custom gadget!");</div>
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