To answer your question, if your data follows a different structure than the default XML handler (called a data descriptor) used by Tree and TreeMap, then you need to create your own custom data descriptor.

You’ll want to implement the interface mx.controls.treeClasses.ITreeDataDescriptor (and possibly ITreeDataDescriptor2). See mx.controls.treeClasses.DefaultDataDescriptor to see how Adobe implemented the default version.

The structure you outline in your sample is like so

[Removed by blog software. Use <tagname> in the future!]

The system I am working with does not use this format. It returns data like so

[Removed by blog software. Use <tagname> in the future!]

I have tried allot of things but the component does not seem to be able to handle this structure. What is need to support this style.

I actually did basically copy all the functions, so I have for example itemToToolTip1() and a completely seperate itemToToolTip2() etc.

I did the same for all of the key functions.

Thanks for the advice there Josh, we really love your Treemap, we think it’s the best we found of several other options we evaluated including some of the commercial ones.

N.P.

We have been using your treemap in a dashboard successfully for a while now, but I just ran into a problem. We included the treemap with some other components, each in their own tab. I made a second treemap on another tab -all within the same mxml file which I know is a bit unorthodox. Until recently it was working fine, but then I ran into a strange problem. we used to have the treemap setup so that “treemap1″ opened up first, but if we open the second treemap first instead, we get an “error 1009:Cannot access a property or method of a null object reference.”

It seems to error out in the itemToToolTip function, on the line
if(this.treeMap.dataDescriptor.isBranch(item))

The wierd thing is, if I start with the first treemap, it works fine, if I start with the second treemap, it gives me this error.

I know this is very vague and ill-defined but I was just wondering if you might have any intuition about what may be causing this?

Thanks

{Maz}