#-

# ==========================================================================

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# rights reserved.

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# The coded instructions, statements, computer programs, and/or related 

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# to use, modify, and incorporate this Data into other products for 

# purposes authorized by the Autodesk software license agreement, 

# without fee.

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# the Software, unless such copies or derivative works are solely 

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#+



# import maya.cmds

# maya.cmds.loadPlugin("blindDoubleDataCmd.py")

# maya.cmds.sphere()

# maya.cmds.spBlindDoubleData()



import sys

import maya.OpenMaya as OpenMaya

import maya.OpenMayaMPx as OpenMayaMPx



kPluginName = "spBlindDoubleData"

kPluginDataId = OpenMaya.MTypeId(0x87011)



#

fValueDictionary={}



# testing function

def printMsg(msg):

	print msg

	stream=OpenMaya.MStreamUtils.stdOutStream()

	OpenMaya.MStreamUtils.writeCharBuffer(stream,msg)



# data

class blindDoubleData(OpenMayaMPx.MPxData):

	def __init__(self):

		OpenMayaMPx.MPxData.__init__(self)

		self.__fValue = 0.0

		fValueDictionary[OpenMayaMPx.asHashable(self)]=self.__fValue



	def readASCII(self, args, lastParsedElement):

		try:

			if args.length() > 0:

				parsedIndex = OpenMaya.MScriptUtil.getUint(lastParsedElement)

				self.__fValue = args.asDouble( parsedIndex )

				parsedIndex += 1

				OpenMaya.MScriptUtil.setUint(lastParsedElement,parsedIndex)

				fValueDictionary[OpenMayaMPx.asHashable(self)]=self.__fValue

		except:

			sys.stderr.write("Failed to read ASCII value.")

			raise





	def readBinary(self, inStream, length):

		readParam = OpenMaya.MScriptUtil()

		readParam.createFromDouble(0.0)

		readPtr = readParam.asDoublePtr()

		OpenMaya.MStreamUtils.readDouble(inStream, readPtr, True )

		self.__fValue = OpenMaya.MScriptUtil.getDouble( readPtr )





	def writeASCII(self, out):

		try:

			OpenMaya.MStreamUtils.writeDouble(out, self.__fValue, False)

		except:

			sys.stderr.write("Failed to write ASCII value.")

			raise

			



	def writeBinary(self, out):

		try:

			OpenMaya.MStreamUtils.writeDouble(out, self.__fValue, True)

		except:

			sys.stderr.write("Failed to write binary value.")

			raise

			



	def copy(self, other):

		# Cannot convert other to self.  Use a dictionary

		# to hold the information we need.

		self.__fValue = fValueDictionary[OpenMayaMPx.asHashable(other)]

		

		

	def typeId(self):

		return kPluginDataId





	def name(self):

		return kPluginName





	def value(self):

		return self.__fValue





	def setValue(self, newVal):

		self.__fValue = newVal





# command

class blindDoubleDataCmd(OpenMayaMPx.MPxCommand):

	def __init__(self):

		OpenMayaMPx.MPxCommand.__init__(self)

		self.__iter = None





	def doIt(self, args):

		selList = OpenMaya.MSelectionList()

		OpenMaya.MGlobal.getActiveSelectionList(selList)

		self.__iter = OpenMaya.MItSelectionList(selList)

		self.redoIt()





	def redoIt(self):

		dependNode = OpenMaya.MObject() # Selected dependency node



		# show message and advance iterator

		def error(msg):

			sys.stderr.write(err)

			self.__iter.next()



		# Iterate over all selected dependency nodes

		#

		while not self.__iter.isDone():

			# Get the selected dependency node and create

			# a function set for it

			#

			try:

				self.__iter.getDependNode(dependNode)	

			except:

				error("Error getting the dependency node")

				continue



			try:

				fnDN = OpenMaya.MFnDependencyNode(dependNode)

			except:

				error("Error creating MFnDependencyNode")

				continue



			# Create a new attribute for our blind data

			#

			fnAttr = OpenMaya.MFnTypedAttribute()

			newAttr = fnAttr.create("blindDoubleData", "BDD", kPluginDataId)



			# Now add the new attribute to the current dependency node

			#

			fnDN.addAttribute(newAttr, OpenMaya.MFnDependencyNode.kLocalDynamicAttr)



			# Create a plug to set and retrive value off the node.

			#

			plug = OpenMaya.MPlug(dependNode, newAttr)



			# Instantiate blindDoubleData and set its value.

			#

			newData = OpenMayaMPx.asMPxPtr(blindDoubleData())



			newData.setValue(3.2)



			# Set the value for the plug.

			#

			plug.setMPxData(newData)



			# Now try to retrieve the value off the plug as an MObject.

			#

			try:

				sData = plug.asMObject()

			except:

				error("Error getting value off plug")

				continue



			# Convert the data back to MPxData.

			#

			pdFn = OpenMaya.MFnPluginData(sData)

			data = pdFn.constData()



			# Get the value.

			#

			if not data:

				error("Error: failed to retrieve data.")

				continue



			self.__iter.next()





	def undoIt(self):

		pass





	def isUndoable(self):

		return True





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





# Creators

def cmdCreator():

	return OpenMayaMPx.asMPxPtr(blindDoubleDataCmd())





def dataCreator():

	return OpenMayaMPx.asMPxPtr(blindDoubleData())





# Initialize the script plug-in

def initializePlugin(mobject):

	mplugin = OpenMayaMPx.MFnPlugin(mobject, "Autodesk", "1.0", "Any")

	try:

		mplugin.registerData(kPluginName, kPluginDataId, dataCreator)

	except:

		sys.stderr.write("Failed to register new data type: %s\n" % kPluginName)

		raise



	try:

		mplugin.registerCommand(kPluginName, cmdCreator)

	except:

		sys.stderr.write("Failed to register command: %s\n" % kPluginName)

		raise





# Uninitialize the script plug-in

def uninitializePlugin(mobject):

	mplugin = OpenMayaMPx.MFnPlugin(mobject)

	try:

		mplugin.deregisterCommand(kPluginName)

	except:

		sys.stderr.write("Failed to unregister command: %s\n" % kPluginName)

		raise



	try:

		mplugin.deregisterData(kPluginDataId)

	except:

		sys.stderr.write("Failed to unregister data type: %s\n" % kPluginName)

		raise