An Object stores key/value pairs where the key is a String. When you
write
map[foo] = "foo";
the 'foo' object gets automatically converted to a String, via its
toString() method. UIComponents have a toString() method which produces
a string indicating their location in the DisplayObject hierarchy, and
this changes when you reparent a UIComponent.
You probably want to use a Dictionary instead of an Object. A Dictionary
can store key/value pairs where the key can be an object and doesn't get
converted to a string.
Gordon Smith
Adobe Flex SDK Team
________________________________
From: [email protected] [mailto:[EMAIL PROTECTED] On
Behalf Of Maciek Sakrejda
Sent: Wednesday, May 28, 2008 10:19 AM
To: flexcoders
Subject: [flexcoders] UIComponents as Object keys and Re-parenting
I have a UIComponent (let's call it Foo) that extends Canvas. I'm trying
to track various instances of this in an Object, mapping each instance
to some String metadata. However, when I re-parent a Foo instance (by
adding it to a new container), or I re-parent that parent container, it
seems to be treated as a completely distinct key by the Object. For
example
var map:Object = new Object();
var foo:Foo = new Foo();
map[foo] = "foo";
for (var key:* in map) {
// Output is something like 'key is Foo455'
trace("key is " + key);
}
var bar:Bar = new Bar();
bar.addChild(foo);
map[foo] = "re-parented foo"
for (var key:* in map) {
// Output is something like 'key is Foo455', 'key is Bar211.Foo455'
trace("key is " + key);
}
Am I missing something? It seems like putting a reference to the object
in a map should not changed when that object is re-parented. Is there
any way to do what I'm looking for? What's the reasoning behind this
behavior.
--
Maciek Sakrejda
Truviso, Inc.
http://www.truviso.com <http://www.truviso.com>
