User Guide

1298 Tree component (Flash Professional only)
When the event is triggered, it automatically passes an event object (eventObject) to the
handler. Each event object has properties that contain information about the event. You can
use these properties to write code that handles the event. The
Tree.nodeClose event’s event
object has one additional property:
node (the XML node that closed).
For more information, see “EventDispatcher class” on page 499.
Example
The following example adds two nodes to the Tree instance my_tr, and then creates two
listener objects, one for
nodeOpen events and one for nodeClose events. When these events
occur, the listener function uses a trace statement to display the event and the affected node in
the Output panel.
You must first add an instance of the Tree component to the Stage and name it
my_tr; then
add the following code to Frame 1.
/**
Requires:
- Tree component on Stage (instance name: my_tr)
*/
var my_tr:mx.controls.Tree;
my_tr.setSize(200, 100);
var trDP_xml:XML = new XML("<node label='1st Local Folders'><node
label='Inbox' data='0'/><node label='Outbox' data='1'/></node><node
label='2nd Local Folders'><node label='Inbox' data='2'/><node
label='Outbox' data='3'/></node>");
my_tr.dataProvider = trDP_xml;
// Create listener object.
var trListener:Object = new Object();
trListener.nodeOpen = function(evt_obj:Object){
trace("Node opened\n" + evt_obj.node);
trace("\n");
}
trListener.nodeClose = function(evt_obj:Object){
trace("Node closed\n" + evt_obj.node);
trace("\n");
}
// Add listeners.
my_tr.addEventListener("nodeOpen", trListener);
my_tr.addEventListener("nodeClose", trListener);