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Issue
Using the XML parser Xtra in
Director (Windows: XMLParser.x32, Macintosh:
XmlParser PPC Xtra) introduces a memory leak. The
memory leak is initiated when commands such as
parseURL or parseString are executed. For
example:
gXMLObj.parseURL(the
moviePath&"myXmlFile.xml").
The amount of memory leaked
is dependent on the size of the XML file and the
number of times the information is
parsed.
Note: Depending on usage
some users will never encounter a memory
leak.
Workarounds
In Director MX the newObject
from scripting was introduced, incorporating Flash
objects inside Director MX. For more information
on this method see Global
Flash command for creating an ActionScript
object (TechNote 16691) and the Director
Designer & Developer Center. There is also
information in the Director MX help. See Media
> Using Flash and Other Interactive Media Types
> Using Flash objects in Lingo. This new method
uses Macromedia Flash and the FlashAsset Xtra to
retrieve XML information. In this example Flash
XML parsing capabilities are used. Below are two
code examples.
| 1. |
Standard use of the
XML Xtra in Director: |
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The code example bellow
represents a standard use of the XML Xtra and
XML parsing. A memory leak might occur using
this method. |
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----startMovie Script----
on startMovie
global pXMLObj
pXMLObj=new(xtra "XMLParser")
pXMLObj.parseURL(the moviePath&"quiz.xml")
end startMovie
----startMovie Script----
----In a frame behavior----
global pXMLObj,gQuestionsList
on exitFrame me
if pXMLObj.doneParsing() then
gQuestionsList=pXMLObj.makeList()
--the handler below represents some property
-- list cleanup routine
formatQuestionHandler()
else go to the frame
end if
end exitFrame
----In a frame behavior----
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| 2. |
Code example for
using the newObject method and XML
parsing: |
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This example makes use of
the "newObject" method.
Flash's XML parser accesses
XML information. The code
below can be used in a startMovie
handler. See the downloadable
sample file below. If
no Flash sprites are used,
the Flash Asset Xtra must
be added to the Director
MX movie. |
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Note: This is just one
of the many ways to create this functionality in
Director. |
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----startMovie Script----
on startMovie
XMLObj=newObject("XML")
setCallback(XMLObj, "onLoad", #loadMyXML, 0)
XMLObj.ignoreWhite=TRUE
XMLObj.load("http://someURL")
end startMovie
on loadMyXML me, arg1, success
if success = TRUE then
--do something, like move to a new frame
go to frame 3
put "XML loaded="&success
end if
end doXML
----startMovie Script----
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Downloadable Director sample
file. This download contains the following files:
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quiz.xml |
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readMe_xml
quiz.txt |
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xml_quiz_newObj.dir
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Download
the zip file
Note: Please note that Macromedia
does not provide technical support for sample
files. For on-line information please see the Director
Support Center. See the Director
newsgroups and online
forums for developer suggestions.
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