[MaxScript] is it possible to store a ref to a callback?

MaVCArt

So I'm working on a set of tools that uses a variety of callbacks, most prominently the Selection Update callback. The problem I keep running into is that some callbacks, due to their nature, have to be persistent across file saves/loads. This in itself isn't a problem, were it not that the functions they're hooked up to don't exist in every scene, which is causing error messages.

What I'm currently trying to do is create a small-ish tool that acts, simply put, as a callback manager. I currently have a system where you can type in the callback's ID, and press a button to add or remove that ID, but as far as I can see there is no way to really ask MaxScript for a list of available callbacks and their individual active IDs.

I've scoured the MaxScript documentation, and the only thing I found that came close was callbacks.Show(), which only lists the available callbacks in the Listener Window, which is not at all what I need.

Does anyone have an idea of how to do this, other than accessing the Listener Window's content and do string processing? (I'm trying to avoid that, it's dirty and dangerous)

TL;DR:

is there a way, in MaxScript (or dotnet for maxscript), to "get" a list of active callbacks that can then be processed?

monster

MaVCArt wrote: »

...the functions they're hooked up to don't exist in every scene, which is causing error messages.

I'm not sure what you mean here. You may need to use global functions or a global struct to keep functions persistent after changing a scene.

MaVCArt wrote: »

is there a way, in MaxScript (or dotnet for maxscript), to "get" a list of active callbacks that can then be processed?

I think you're going to have to process the string. I don't think there's anyway to return an array of callbacks.

MaVCArt

Ah ok thanks I was afraid of as much considering the unusual lack of information in the documentation about the available methods for callbacks. I'm assuming this was done intentionally to prevent users from accidentally removing necessary callbacks, but other than that it would be nice to have them exposed a bit more than they are.

Thanks though

leslievdb

http://forums.cgsociety.org/showthread.php?t=621261

your best option

closeLog() -- close the listener log file, if any
openLog "c:\\listener.log" mode:"w" outputOnly:true -- log listener output
callbacks.show() -- get all the callbacks.  This output will now be in "c:\\listener.log" as well
flushLog() -- flush the log
closeLog() -- close the log

MaVCArt

thanks leslie, that worked wonders

leslievdb

another one of those examples why maxscript is a giant clusterfuck