the callbacks must be written using the maya api. the object that is passed to the callback is an MFnDependencyNode.
from the docs in the example file: When registering a new virtual subclass, you must provide a callback function that accepts two arguments: an MFnDepencencyNode instance for the current object, and its name. ... If your callback needs access to Maya functionality, it should only use the API. This ensures that it is fast and that it does not cause an infinite recursion. -chad On Apr 6, 2009, at 3:58 PM, [email protected] wrote: > > hi chad, > i try the customClasses technique but i have a problem i can test if a > attribute exist in the callback fonction > but not get his value. > > code : > from pymel import * > > class LegJoint(Joint): > """ this is an example of how to create your own subdivisions of > existing nodes""" > > def kick(self): > print "kicking" > > class JawJoint(Joint): > """ this is an example of how to create your own subdivisions of > existing nodes""" > > def munch(self): > print "munching" > > def legJointCallback( fn, name ): > """if the desired attribute exists, then we're a LegJoint!""" > try: > print "testing if this is a leg joint" > # this function fails if the attribute does not exist, so we > have to try/except it. > return fn.hasAttribute( 'jointType_leg' ) > except: pass > return False > > def jawJointCallback( fn, name ): > """if the desired attribute exists, then we're a LegJoint!""" > try: > # this function fails if the attribute does not exist, so we > have to try/except it. > print "testing if this is a jaw joint" > return fn.jointType_jaw.get() == 'yes' > except: pass > return False > > LegJoint.registerVirtualSubClass( legJointCallback, > nameRequired=False ) > JawJoint.registerVirtualSubClass( jawJointCallback, > nameRequired=False ) > > > def testJoint(): > joint() > joint() > j1 = joint() > j2 = joint() > j1.addAttr( 'jointType_leg' ) > j2.addAttr( 'jointType_jaw',dt='string' ) > j2.jointType_jaw.set('yes') > > # now list the joints and see which ones are our special joints > res = ls(type='joint') > for x in res: > if isinstance(x, LegJoint ): > x.kick() > elif isinstance(x, JawJoint ): > x.munch() > > sorry for my english and thank you for the fantastic work you are > doing. > colas > > --~--~---------~--~----~------------~-------~--~----~ http://groups.google.com/group/python_inside_maya -~----------~----~----~----~------~----~------~--~---
