MaxChars / restrict characters in TextFlow (or any flashx.textlayout.* element)

Question

Is there an equivalent of the maxChars property anywhere in the TextLayout engine? I expected to find something in the EditManager class but after much searching I can't find a simple way to limit character input on any element in the engine. Am I missing something?
Thanks,
Casey

Answer 1

Thanks for your prompt reply Gordon. I find it a bit bizarre that this functionality is completely excluded from TLF, but I'm sure there's a reason...
Anyway, for anyone else reading this thread and wondering how to restrict text, here's what I did:
The notable methods can be found in this file:
http://opensource.adobe.com/svn/opensource/flex/sdk/tags/4.0.0.14159_RC/frameworks/project s/spark/src/spark/components/RichEditableText.as
They are:
textContainerManager_flowOperationBeginHandler() {
    //copied and cleaned out unused operations
textContainerManager_flowOperationEndHandler() {
   //copied and cleaned out unused operations
   //calls handlePasteOperation()
handlePasteOperation()
I just copied these methods to my class and bound them to the events dispatched by my instance of TextFlow. I had to add a few properties to the class, "text" and "maxChars" which I think are pretty self explanatory. Here's the binding:
myTextFlow.addEventListener(FlowOperationEvent.FLOW_OPERATION_BEGIN, textContainerManager_flowOperationBeginHandler);
myTextFlow.addEventListener(FlowOperationEvent.FLOW_OPERATION_END, textContainerManager_flowOperationEndHandler);
I also cleaned out the unused operations as they relate to my class. Primarily the event handling that occurs in the methods -- I didn't need any of that jazz.
Hope someone finds this useful.
--C