- Main Page
- Related Pages
- Modules
- Classes
- Examples

# parentAddedMsgCmd.py

    #-
    # ==========================================================================
    # Copyright (C) 1995 - 2006 Autodesk, Inc. and/or its licensors.  All
    # rights reserved.
    #
    # The coded instructions, statements, computer programs, and/or related
    # material (collectively the "Data") in these files contain unpublished
    # information proprietary to Autodesk, Inc. ("Autodesk") and/or its
    # licensors, which is protected by U.S. and Canadian federal copyright
    # law and by international treaties.
    #
    # The Data is provided for use exclusively by You. You have the right
    # to use, modify, and incorporate this Data into other products for
    # purposes authorized by the Autodesk software license agreement,
    # without fee.
    #
    # The copyright notices in the Software and this entire statement,
    # including the above license grant, this restriction and the
    # following disclaimer, must be included in all copies of the
    # Software, in whole or in part, and all derivative works of
    # the Software, unless such copies or derivative works are solely
    # in the form of machine-executable object code generated by a
    # source language processor.
    #
    # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND.
    # AUTODESK DOES NOT MAKE AND HEREBY DISCLAIMS ANY EXPRESS OR IMPLIED
    # WARRANTIES INCLUDING, BUT NOT LIMITED TO, THE WARRANTIES OF
    # NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR
    # PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE, OR
    # TRADE PRACTICE. IN NO EVENT WILL AUTODESK AND/OR ITS LICENSORS
    # BE LIABLE FOR ANY LOST REVENUES, DATA, OR PROFITS, OR SPECIAL,
    # DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES, EVEN IF AUTODESK
    # AND/OR ITS LICENSORS HAS BEEN ADVISED OF THE POSSIBILITY
    # OR PROBABILITY OF SUCH DAMAGES.
    #
    # ==========================================================================
    #+

    # import maya
    # maya.cmds.loadPlugin("parentAddedMsgCmd.py")
    # maya.cmds.spParentAddedMsg()

    import sys
    import maya.OpenMaya as OpenMaya
    import maya.OpenMayaMPx as OpenMayaMPx

    kPluginCmdName = "spParentAddedMsg"

    messageId = 0
    messageIdSet = False

    def removeCallback(id):
        try:
            OpenMaya.MMessage.removeCallback( id )
        except:
            sys.stderr.write( "Failed to remove callback\n" )
            raise

    def dagParentAddedCallback( child, parent, clientData ):
        print "dagParentAddedCallback..."
        print "\tchild %s" % child.fullPathName()
        print "\tparent %s" % parent.fullPathName()
        print "\tclient data %s" % clientData

    def createParentAddedCallback(stringData):
        # global declares module level variables that will be assigned
        global messageIdSet
        try:
            id = OpenMaya.MDagMessage.addParentAddedCallback( dagParentAddedCallback, stringData )
        except:
            sys.stderr.write( "Failed to install dag parent added callback\n" )
            messageIdSet = False
        else:
            messageIdSet = True
        return id

    # command
    class scriptedCommand(OpenMayaMPx.MPxCommand):
        def __init__(self):
            OpenMayaMPx.MPxCommand.__init__(self)
        def doIt(self,argList):
            global messageId
            if ( messageIdSet ):
                print "Message callaback already installed"
            else:
                print "Installing parent added callback message"
                messageId = createParentAddedCallback( "_noData_" )

    # Creator
    def cmdCreator():
        return OpenMayaMPx.asMPxPtr( scriptedCommand() )

    # Initialize the script plug-in
    def initializePlugin(mobject):
        mplugin = OpenMayaMPx.MFnPlugin(mobject)
        try:
            mplugin.registerCommand( kPluginCmdName, cmdCreator )
        except:
            sys.stderr.write( "Failed to register command: %s\n" % name )
            raise

    # Uninitialize the script plug-in
    def uninitializePlugin(mobject):
        # Remove the callback
        if ( messageIdSet ):
            removeCallback( messageId )
        # Remove the plug-in command
        mplugin = OpenMayaMPx.MFnPlugin(mobject)
        try:
            mplugin.deregisterCommand( kPluginCmdName )
        except:
            sys.stderr.write( "Failed to unregister command: %s\n" % kPluginCmdName )
            raise