moveManip.py

#-
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# import maya
# maya.cmds.loadPlugin("moveManip.py")
# maya.cmds.spMoveManipCtxCmd( 'spMoveManipContext1' )
# maya.cmds.setParent( 'Shelf1' )
# maya.cmds.toolButton( 'spMoveManip1', cl='toolCluster', t='spMoveManipContext1', i1="moveManip.xpm" )

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

moveManipId = OpenMaya.MTypeId(0x87009)
contextCmdName = "spMoveManipCtxCmd"
nodeName = "spMoveManip"

class moveManip(OpenMayaMPx.MPxManipContainer):
        fDistanceManip = OpenMaya.MDagPath()
        fFreePointManip = OpenMaya.MDagPath()

        def __init__(self):
                OpenMayaMPx.MPxManipContainer.__init__(self)

        def createChildren(self):
                self.fDistanceManip = self.addDistanceManip("distanceManip", "distance")
                distanceManipFn = OpenMayaUI.MFnDistanceManip(self.fDistanceManip)
                startPoint = OpenMaya.MPoint(0.0, 0.0, 0.0)
                direction = OpenMaya.MVector(0.0, 1.0, 0.0)
                distanceManipFn.setStartPoint(startPoint)
                distanceManipFn.setDirection(direction)
                self.fFreePointManip = self.addFreePointTriadManip("pointManip", "freePoint")

        def connectToDependNode(self, node):
                nodeFn = OpenMaya.MFnDependencyNode(node)

                try:
                        syPlug = nodeFn.findPlug("scaleY")
                        tPlug = nodeFn.findPlug("translate")
                        distanceManipFn = OpenMayaUI.MFnDistanceManip(self.fDistanceManip)
                        distanceManipFn.connectToDistancePlug(syPlug)
                        freePointManipFn = OpenMayaUI.MFnFreePointTriadManip(self.fFreePointManip)
                        freePointManipFn.connectToPointPlug(tPlug)
                        OpenMayaMPx.MPxManipContainer.finishAddingManips(self)
                        OpenMayaMPx.MPxManipContainer.connectToDependNode(self,node)
                except:
                        sys.stderr.write( "Error finding and connecting plugs\n" )
                        raise

def moveManipCreator():
        return OpenMayaMPx.asMPxPtr( moveManip() )

def moveManipInitialize():
        OpenMayaMPx.MPxManipContainer.initialize()

class moveManipContext(OpenMayaMPx.MPxSelectionContext):
        def __init__(self):
                OpenMayaMPx.MPxSelectionContext.__init__(self)

        def toolOnSetup(self,event):
                updateManipulators(self)
                OpenMaya.MModelMessage.addCallback(OpenMaya.MModelMessage.kActiveListModified, updateManipulators, self)

def updateManipulators(clientData):
        clientData.deleteManipulators()
        selectionList = OpenMaya.MSelectionList()

        OpenMaya.MGlobal.getActiveSelectionList(selectionList)
        selectionIter = OpenMaya.MItSelectionList(selectionList, OpenMaya.MFn.kInvalid)
        while not selectionIter.isDone():
                dependNode = OpenMaya.MObject()
                selectionIter.getDependNode(dependNode)
                if dependNode.isNull() or not dependNode.hasFn(OpenMaya.MFn.kDependencyNode):
                        print "depend node is null"
                        continue
                        
                dependNodeFn = OpenMaya.MFnDependencyNode(dependNode)
                rPlug = dependNodeFn.findPlug("translate", False)
                sPlug = dependNodeFn.findPlug("scaleY", False)
                if rPlug.isNull() or sPlug.isNull():
                        print "translate and/or scale plugs are null"
                        selectionIter.next()
                        continue

                manipObject = OpenMaya.MObject()
                manipulator = OpenMayaMPx.MPxManipContainer.newManipulator(nodeName, manipObject)
                if manipulator is not None:
                        clientData.addManipulator(manipObject)
                        manipulator.connectToDependNode(dependNode)
                selectionIter.next()

class moveManipCtxCmd(OpenMayaMPx.MPxContextCommand):
        def __init__(self):
                OpenMayaMPx.MPxContextCommand.__init__(self)

        def makeObj(self):
                return OpenMayaMPx.asMPxPtr( moveManipContext() )


def contextCmdCreator():
        return OpenMayaMPx.asMPxPtr( moveManipCtxCmd() )


# initialize the script plug-in
def initializePlugin(mobject):
        mplugin = OpenMayaMPx.MFnPlugin(mobject)

        try:
                mplugin.registerContextCommand( contextCmdName, contextCmdCreator )
        except:
                print "Failed to register context command: %s" % contextCmdName
                raise
        
        try:
                mplugin.registerNode(nodeName, moveManipId, moveManipCreator, moveManipInitialize, OpenMayaMPx.MPxNode.kManipContainer)
        except:
                print "Failed to register node: %s" % nodeName
                raise

# uninitialize the script plug-in
def uninitializePlugin(mobject):
        mplugin = OpenMayaMPx.MFnPlugin(mobject)
        try:
                mplugin.deregisterContextCommand(contextCmdName)
        except:
                print "Failed to deregister context command: %s" % contextCmdName
                raise
                
        try:
                mplugin.deregisterNode(moveManipId)
        except:
                print "Failed to deregister node: %s" % nodeName
                raise