ControlMeta_v1.py

class ControlMeta(type):
    '''
    Metaclass which creates CtlProperty  objects for maya gui proxies
    '''
    CONTROL_ATTRIBS = ['annotation', 'backgroundColor', 'defineTemplate', 
                'docTag', 'dragCallback', 'dropCallback', 'enable', 
                'enableBackground',  'exists', 'fullPathName', 'height',  
                'manage', 'noBackground',  'numberOfPopupMenus', 'parent', 
                'popupMenuArray', 'preventOverride', 'useTemplate', 'visible', 
                'visibleChangeCommand', 'width']
    			
    def __new__(cls, name, parents, kwargs):
        '''
        __new__ is called then classes using this meta are defined.  It will add 
        all of the items in CONTROL_ATTRIBS to the new class definition as 
        CtlProperty descriptor objects using the CMD field (a maya.cmds command) 
        provied in the outer class.
        '''
        
        CMD = kwargs.get('CMD', None)
        
        if not kwargs.get('CMD'):
            CMD = parents[0].CMD
            
        for item in ControlMeta.CONTROL_ATTRIBS:
            kwargs[item] = CtlProperty(item, CMD)

        return super(ControlMeta, cls).__new__(cls, name, parents, kwargs)