Mega Code Archive
Drill Into Tree
<![CDATA[
<!--
Code from Flex 4 Documentation "Using Adobe Flex 4".
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<!-- dpcontrols/DrillIntoTree.mxml -->
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/mx"
creationComplete="initApp();">
<fx:Script>
import mx.collections.XMLListCollection;
import mx.core.FlexGlobals;
[Bindable]
private var treeData:XML = <root>
<node label="Monkeys">
<node label="South America">
<node label="Coastal"/>
<node label="Inland"/>
</node>
<node label="Africa" isBranch="true"/>
<node label="Asia" isBranch="true"/>
</node>
<node label="Sharks">
<node label="South America" isBranch="true"/>
<node label="Africa" isBranch="true"/>
<node label="Asia" >
<node label="Coastal"/>
<node label="Inland"/>
</node>
</node>
</root>;
private var openSequence:Array = [];
private function initApp():void {
/* Parse URL and place values into openSequence Array.
This lets you pass any integers on the query string,
in any order. So:
http://localhost/flex/flex2/DrillIntoTree.swf?0=1&1=2&2=0
results in an array of selections like this:
0:1
1:2
2:0
Non-ints are ignored.
The Array is then used to drill down into the tree.
*/
var paramLength:int = 0;
for (var s:String in FlexGlobals.topLevelApplication.parameters) {
if (!isNaN(Number(s))) {
openSequence[s] = FlexGlobals.topLevelApplication.parameters[s];
paramLength += 1;
}
}
openTree();
}
private function openTree():void {
var nodeList:XMLListCollection = myTree.dataProvider as XMLListCollection;
var node:XMLList = nodeList.source;
for(var i:int=0; i < openSequence.length; i++) {
var j:int = openSequence[i];
var n:XML = node[j];
if( n.children() != null ) {
myTree.expandItem(n,true,false);
node = n.children();
} else {
break;
}
}
if( n != null )
myTree.selectedItem = n;
}
</fx:Script>
<mx:Tree id="myTree" y="50" width="221" height="257"
horizontalCenter="0" dataProvider="{treeData.node}" labelField="@label" />
</s:Application>
]]>