How to call a function, when I select object.

[ewerybody]

you need a selectionChanged scriptJob:

scriptJob -e "SelectionChanged" "delete `ls -sl`";

If you have a UI you work with parent the job with it! So it will be killed if the UI gets closed. Otherwise you'd want to remember the scriptJobID to be able to kill it afterwards. You could also just browse all existing jobs to look for your command to prevent double execution of the job.

[johnyz]

alright. That sounds nice... Could you explain how do I connect this script with my object? I'm not experienced in Mel scripting - forgive me. Let's say I have an object PCube1. And whenever I select it i want some functions to execute. How do I do it using your script?

[ewerybody]

its not my script ;]
"scriptJob" is a Maya built in command. With it you can set up invoking commands on certain conditions or events occur. One of these events is "SelectionChanged".

Now whenever you select anything you could now look if the selection is "PCube1".

{
int $scriptJobID = `scriptJob -e "SelectionChanged" "johnyz_SelChangeCommand"`;
print ("Remember to kill scriptJob " + $scriptJobID + " if you don't need it anymore!\n");
}

global proc johnyz_SelChangeCommand()
{
string $selectionArray[] = `ls -selection`;
if ($selectionArray[0] == "PCube1")
{
print "Hey you actually selected \"PCube1\"\n";
}
}

look at the docs for scriptJob (http://download.autodesk.com/us/maya/2008help/Commands/scriptJob.html). Its quite interesting.
with -listJobs you can have a look at all running jobs. -kill well... kills a job with the given number.

[johnyz]

Thank you so much everybody for such detailed explanation. This is what I needed my friend :D

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