Hey Peter,
First probelm I see is this...
In your photo_navigation() method, you do this...
trace(my_xml = + my_xml);
... immediately after this...
var my_xml = load_xml(xml_file);
When you call the trace() your xml won't have loaded yet and therefore will
not have been returned. I'm guessing that's where you're getting
'undefined'.
Another potential issue you may end up with, again in your
photo_navigation() method, is that you declare your 'my_xml' var within the
method. I think I'm correct in saying that this means the variable is scoped
only to that method - i.e. you won't be able to access it from anywhere
else. To fix it use something like this...
// Contents of photo_navigation.as
class photo_navigation extends xml_loader {
public var my_xml:XML;
// constructor
public function photo_navigation(xml_file:String) {
// take the xml_file string and pass it to the superclass
xml_loader
my_xml = load_xml(xml_file);
// trace out the contents of my_xml
trace(my_xml = + my_xml);
}
}
Note that the variable is declared (but with no value) in the body of the
'photo_navigation' class and is initialised in the constructor *without* the
var decleration. This way you will be able to access the variable from
anywhere in the class and, since it is declared as public, from anywhere
outside the class too.
Hope this helps.
Adrian P.
On 3/1/06, Peter Burke [EMAIL PROTECTED] wrote:
Howdy folks,
Just trying to get my head wrapped around this issue. In
photo_navigation.as, I'm trying to get back a return type of XML from
xml_loader. But when I attempt this: trace(my_xml = + my_xml);, I
end
up getting: my_xml = undefined. Somewhere along the line I'm losing the
my_xml value in xml_loader.as because the value returned is empty.
I've been banging my head against this problem awhile now and need a
second
or third opinion...
// Contents of xml_loader.as:
class xml_loader extends MovieClip {
// constructor
public function xml_loader() {
}
// public method to load the xml file
public function load_xml(xml_file:String) {
var myclass = this
// Create a local variable that points back to the current object
var thisObj:xml_loader = this;
// Create a local variable, which is used to load the XML file.
var my_xml:XML = new XML();
// Ignore whitespace
my_xml.ignoreWhite = true;
// Upon successful load of the xml file
my_xml.onLoad = function(success:Boolean) {
if (success) {
thisObj.init(my_xml);
// return the my_xml variable value
return my_xml;
} else {
trace(error loading XML);
return null;
}
};
// Begin loading the XML document.
my_xml.load(xml_file);
}
public function init(my_xml):Void {
// uncommenting the following line results in the xml being
printed
correctly
// trace(my_xml);
}
}
// Contents of photo_navigation.as
class photo_navigation extends xml_loader {
// constructor
public function photo_navigation(xml_file:String) {
// take the xml_file string and pass it to the superclass
xml_loader
var my_xml = load_xml(xml_file);
// trace out the contents of my_xml
trace(my_xml = + my_xml);
}
}
// Contents of photos.xml
albums
album url=album_001/ label=Album 001 index=0
photo url=photo_001.jpg label=Photo 001 index=0 /
/album
/albums
Thanks for any help you can give me!
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