Passing selection list or node names in a command

[meljunky]

I am teaching myself on how to create a template command python
plugin.
What I done so far:
1) Accepts a flag called -f/-from
2) If no flag is specified then a default string is used.
3) A method of allowing undo
What I am trying to do:
1) Accepts argument that does not use a flag. Similar to a
pointConstraint's command:
pointConstraint -offset 0 0 0 -weight 1; //Use the current selected
objects
pointConstraint -offset 0 0 0 -weight 1 sphere1 sphere2; //Use the
nodes for the constraint provided they exist
I simply want to print the selection if no nodes are specified ot
print the nodes specified like sphere1 sphere2
Where I am at:
I got the syntaxCreator to look for a selection using
syntax.useSelectionAsDefault(True)
syntax.setObjectType(syntax.kSelectionList, 0);
I cannot get the doIt function to recognized the selection or the
specified nodes.

It will make creating commands easier since it follows the same
format.. far as I know.

Thanks

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

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

kPluginCmdName = "helloWorld"

kHelloFromFlag = "-f"
kHelloFromLongFlag = "-from"



print "helloWorldCmd.py has been loaded..."

# command
class scriptedCommand(OpenMayaMPx.MPxCommand):
def __init__(self):
OpenMayaMPx.MPxCommand.__init__(self)
self.__fromWhere = "George"

def doIt(self, args):
# Parse the arguments.
argData = OpenMaya.MArgDatabase(self.syntax(), args)

####################################################
#Where I am trying to get the recognization to work#
####################################################

if argData.isFlagSet(kHelloFromFlag):
self.__fromWhere =
argData.flagArgumentString(kHelloFromFlag, 0)
self.redoIt()

def redoIt(self):
print "Hello World from", self.__fromWhere

def isUndoable (self):
return True

def undoIt(self):
print "Goodbye World!"

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

# Syntax creator
def syntaxCreator():
syntax = OpenMaya.MSyntax()
syntax.addFlag(kHelloFromFlag, kHelloFromLongFlag,
OpenMaya.MSyntax.kString)
syntax.useSelectionAsDefault(True)
syntax.setObjectType(syntax.kSelectionList, 0);
return syntax

# Initialize the script plug-in
def initializePlugin(obj):
plugin = OpenMayaMPx.MFnPlugin(obj, "Autodesk", "1.0", "Any")
try:
plugin.registerCommand( kPluginCmdName, cmdCreator, syntaxCreator)
sys.stderr.write( "Register command complete: %s\n" %
kPluginCmdName )
except:
sys.stderr.write( "Failed to register command: %s\n" %
kPluginCmdName )

# Uninitialize the script plug-in
def uninitializePlugin(obj):
plugin = OpenMayaMPx.MFnPlugin(obj)
try:
plugin.deregisterCommand(kPluginCmdName)
except:
sys.stderr.write( "Failed to unregister command: %s\n" %
kPluginCmdName )
raise

[ynedelin]

Did you ever figure out how to do this?