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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
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<title>YUI Library Examples: SWF Utility: Advanced SWF Utility Example With Flashvars and Javascript interaction</title>
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<div id="pagetitle"><h1>YUI Library Examples: SWF Utility: Advanced SWF Utility Example With Flashvars and Javascript interaction</h1></div>
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<h1>SWF Utility: Advanced SWF Utility Example With Flashvars and Javascript interaction</h1>
<div class="exampleIntro">
<p>This example is an advanced demonstration of the <a href="../../swf/">YUI SWF</a> utility features.</p>
<p><strong>Note:</strong> This example of the YUI SWF Utility usage requires Flash Player 9.0.115 or higher. The latest version of Flash Player is available at the <a href="http://www.adobe.com/go/getflashplayer">Adobe Flash Player Download Center</a>.</p>
</div>
<div class="example-container module ">
<div class="hd exampleHd">
<p class="newWindowButton yui-skin-sam"><!--<span id="newWindowLinkx"><span class="first-child">--><a href="swf-advanced_clean.html" target="_blank">View example in new window.</a><!--</span></span>-->
</div> <div id="example-canvas" class="bd">
<!--BEGIN SOURCE CODE FOR EXAMPLE =============================== -->
<div id="swfContainer" style="width:400px;height:200px">
The version of the Flash player installed on your computer is outdated. Please download and install the newest version.
</div>
<script type="text/javascript">
// Instantiate the parameters to pass to the SWF.
// Note the scale and salign parameters.
// The scale="noscale" specifies that the swf is to
// be displayed as is, without shrinking it or stretching it.
// salign = "TL" specifies that the content of the swf
// should be aligned to the top left of the viewport.
// flashVars are the arbitrary variables passed to the SWF.
// In our case, the SWF will display the names and content
// of these variables.
var params = {version: 9.115,
useExpressInstall: false,
allowScriptAccess: "always",
fixedAttributes:
{scale: "noscale", salign: "TL"},
flashVars:
{foo: "One", bar: "Two"}
};
// Create an instance of the swf and pass the parameters
var mySWF = new YAHOO.widget.SWF("swfContainer", "assets/SWFExampleAdvanced.swf", params);
// Subscribe to the swfReady event, which fires when the SWF has been instantiated
// and becomes available for communication with Javascript
mySWF.subscribe("swfReady", testFlash);
// Subscribe to the textAdded event, which the SWF dispatches when an addText method
// has been called on it.
mySWF.subscribe("textAdded", logTextAdded);
function testFlash () {
// call addText method on the swf, passing some strings to it as arguments.
mySWF.callSWF("addText", ["Sample text\n"]);
mySWF.callSWF("addText", ["Another sample text\n"]);
}
// Handler for the textAdded event dispatched by SWF
function logTextAdded () {
YAHOO.log("Text has been added to the SWF");
}
</script>
<!--END SOURCE CODE FOR EXAMPLE =============================== -->
</div>
</div>
</div>
<h2 class="first">Advanced SWF Utility Example</h2>
<p>In this example, we demonstrate how to embed a SWF on a page, pass it configuration parameters, and interact with it via ExternalInterface and the corresponding YUIBridge library in Actionscript.</p>
<p>First, include the following JS source files:</p>
<textarea name="code" class="html" cols="60" rows="5">
<!-- Dependencies -->
<script type="text/javascript" src="http://yui.yahooapis.com/2.9.0/build/yahoo-dom-event/yahoo-dom-event.js"></script>
<script type="text/javascript" src="http://yui.yahooapis.com/2.9.0/build/element/element-min.js"></script>
<!-- Source files -->
<script type="text/javascript" src="http://yui.yahooapis.com/2.9.0/build/swf/swf-min.js"></script>
</textarea>
<p>Next, create a container where the SWF will be placed. The size of the container will be the size of the SWF (in this case, we set it to 400 by 200 pixels). The current content of the container is what will be displayed if there is no Flash installed on the user's machine, or if the version of the Flash player installed does not match the minimum required.</p>
<textarea name="code" class="html" cols="60" rows="5">
<div id="swfContainer" style="width:400px;height:200px">
The version of the Flash player installed on your computer is outdated. Please download and install the newest version.
</div>
</textarea>
<p>Now, create an object with the necessary parameters to pass to the SWF. In this case, we specify the minimum version of Flash player required, whether to use the ExpressInstall capability of the Flash player, and a few SWF-specific fixed attributes, namely the "scale" attribute, which specifies whether to shrink or stretch the Flash content to fit the viewport (in our case, no shrinking or stretching is allowed), and the "salign" attribute, which specifies how to align the content in the viewport (in our case, we align it to top left). We also specify the value for the "allowScriptAccess" parameter as "always", which allows the SWF to make calls to Javascript functions, and vice versa. In addition, we pass some FlashVars -- arbitrary variables which, in our example, will be displayed by the SWF:</p>
<textarea name="code" class="html" cols="60" rows="5">
var params = {version: 9.115,
useExpressInstall: false,
allowScriptAccess: "always",
fixedAttributes:
{scale: "noscale", salign: "TL"},
flashVars:
{foo: "One", bar: "Two"}
};
</textarea>
<p>Next, we create an instance of the swf and pass the parameters:</p>
<textarea name="code" class="html" cols="60" rows="5">
var mySWF = new YAHOO.widget.SWF("swfContainer", "assets/SWFExampleAdvanced.swf", params);
</textarea>
<p>Next, we subscribe to the swfReady event, which fires when the SWF has been instantiated and becomes available for communication with Javascript (if the swf is using the YUIBridge library):
<textarea name="code" class="html" cols="60" rows="5">
mySWF.subscribe("swfReady", testFlash);
</textarea>
<p>We also subscribe to the textAdded event, which the SWF dispatches when an addText method has been called on it:</p>
<textarea name="code" class="html" cols="60" rows="5">
mySWF.subscribe("textAdded", logTextAdded);
</textarea>
<p>Next, we specify the handler that is called when the "swfReady" event fires (because of the subscribe() call above). The handler calls a method on the swf called "addText", and passes a string value to it. (the method is exposed by the SWF using the YUIBridge library):
<textarea name="code" class="html" cols="60" rows="5">
function testFlash () {
mySWF.callSWF("addText", ["Some sample text\n"]);
}
</textarea>
<p>Finally, we also add a handler for the "textAdded" event, which the SWF fires when its "addText" method has been called:</p>
<textarea name="code" class="html" cols="60" rows="5">
function logTextAdded () {
YAHOO.log("Text has been added to the SWF");
alert("Text added!");
}
</textarea>
<p>You can download the source code for the sample swf and the YUIBridge library <a href="assets/YUIBridgeExample.zip">here</a>.</p>
<h2>Configuration for This Example</h2>
<p>You can load the necessary JavaScript and CSS for this example from Yahoo's servers. <a href="http://developer.yahoo.com/yui/articles/hosting/?swf&MIN#configure">Click here to load the YUI Dependency Configurator with all of this example's dependencies preconfigured</a>.</p>
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<h3 class="firstContent">YUI Logger Output:</h3>
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<h3>SWF Utility Examples:</h3>
<div id="exampleToc">
<ul>
<li><a href='../swf/swf-simple.html'>Simple SWF Utility Example</a></li><li class='selected'><a href='../swf/swf-advanced.html'>Advanced SWF Utility Example With Flashvars and Javascript interaction</a></li> </ul>
</div>
</div>
<div id="module">
<h3>More SWF Utility Resources:</h3>
<ul>
<li><a href="http://developer.yahoo.com/yui/swf/">User's Guide</a> (external)</li>
<li><a href="../../docs/module_swf.html">API Documentation</a></li>
</ul>
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