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# basicObjectSet.py

    #-
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    # without fee.
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    #+

    #
    # Creation Date:   12 October 2006
    #
    # Description:
    #   Trivial extension of MPxObjectSet
    #

    import maya.OpenMaya as OpenMaya
    import maya.OpenMayaMPx as OpenMayaMPx
    import math, sys

    kNodeName = "spBasicObjectSet"
    kCmdName = "spBasicObjectSetTest"
    kNodeId = OpenMaya.MTypeId(0x87012)

    # Node definition
    class BasicObjectSet(OpenMayaMPx.MPxObjectSet):
        def __init__(self):
            OpenMayaMPx.MPxObjectSet.__init__(self)

    class BasicObjectSetTest(OpenMayaMPx.MPxCommand):
        def __init__(self):
            OpenMayaMPx.MPxCommand.__init__(self)
            self.__fDGMod = OpenMaya.MDGModifier()

        def doIt(self, args):
            # Create the node
            #
            setNode = self.__fDGMod.createNode(kNodeId)
            self.__fDGMod.doIt()

            # Populate the set with the selected items
            #
            selList = OpenMaya.MSelectionList()
            OpenMaya.MGlobal.getActiveSelectionList(selList)
            if selList.length():
                setFn = OpenMaya.MFnSet(setNode)
                setFn.addMembers(selList)

            depNodeFn = OpenMaya.MFnDependencyNode(setNode)
            OpenMayaMPx.MPxCommand.setResult(depNodeFn.name())

    #####################################################################

    # creator
    def nodeCreator():
        return OpenMayaMPx.asMPxPtr(BasicObjectSet())

    # initializer
    def nodeInitializer():
        # nothing to initialize
        pass

    def cmdCreator():
        return OpenMayaMPx.asMPxPtr(BasicObjectSetTest())

    def cmdSyntaxCreator():
        return OpenMaya.MSyntax()

    # initialize the script plug-in
    def initializePlugin(mobject):
        mplugin = OpenMayaMPx.MFnPlugin(mobject, "Autodesk", "1.0", "Any")
        try:
            mplugin.registerCommand(kCmdName, cmdCreator, cmdSyntaxCreator)
        except:
            sys.stderr.write("Failed to register command: %s" % kCmdName)
            raise

        try:
            mplugin.registerNode(kNodeName, kNodeId, nodeCreator, nodeInitializer, OpenMayaMPx.MPxNode.kObjectSet)
        except:
            sys.stderr.write("Failed to register node: %s" % kNodeName)
            raise

    # uninitialize the script plug-in
    def uninitializePlugin(mobject):
        mplugin = OpenMayaMPx.MFnPlugin(mobject)
        try:
            mplugin.deregisterCommand(kCmdName)
        except:
            sys.stderr.write("Failed to deregister command: %s" % kCmdName)
            raise

        try:
            mplugin.deregisterNode(kNodeId)
        except:
            sys.stderr.write("Failed to deregister node: %s" % kNodeName)
            raise