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1271

1270 Tree component (Flash Professional only)

This ActionScript sets up styles for the tree. An XML object is created to load the XML

file that creates the tree’s nodes. Then the

onLoad event handler is defined to set the data

provider to the contents of the XML file.

11. Create a new file called TreeNavMenu.xml in a text editor.

12. Enter the following code in the file:

<node>

<node label="MXNA blog aggregator" url="http://www.markme.com/mxna"

</node>

</node>

13.

Save your documents and return to treeMenu.fla. Select Control > Test Movie to test

the application.

To load XML from an external file:

1. In Flash, select File > New and select Flash Document.

2. Drag an instance of the Tree component onto the Stage.

3. Select the Tree instance. In the Property inspector, enter the instance name myTree.

4. In the Actions panel on Frame 1, enter the following code:

var myTreeDP:XML = new XML();

myTreeDP.ignoreWhite = true;

myTreeDP.load("treeXML.xml");

myTreeDP.onLoad = function() {

myTree.dataProvider = this.firstChild;

};

var treeListener:Object = new Object();

treeListener.change = function(evt:Object) {

trace("selected node is: "+evt.target.selectedNode);

trace("");

};

myTree.addEventListener("change", treeListener);

This code creates an XML object called myTreeDP and calls the XML.load() method to

load an XML data source. The code then defines an

onLoad event handler that sets the

dataProvider property of the myTree instance to the new XML object when the

XML loads. For more information about the XML object, see its entry in ActionScript 2.0

Language Reference.

5. Create a new file called treeXML.xml in a text editor.