Advanced playback for maya

playAdvanced

'''
Just assign to any hotkey short commented code below 

import playAdvanced
mods = mc.getModifiers()
if mods == 1:
	playAdvanced.playFromTheBeginning()
elif mods == 4:
	playAdvanced.loadSteppedScript( 4 )
else:
	playAdvanced.playFromTheCurrent()
'''

import maya.cmds as mc

def playFromTheBeginning():
	global currentTLFrame
	if not mc.play( q=1, state=1 ):
		currentTLFrame = mc.currentTime( q=1 )
		minRange = mc.playbackOptions( q=1, min=1 )
		mc.currentTime( minRange )
		mc.play( state=1 )
	else:
		mc.currentTime( currentTLFrame )
		mc.play( state=0 )

def playFromTheCurrent():
	global currentTLFrame
	print mc.play( q=1, state=1 )
	if not mc.play( q=1, state=1 ):
		mc.play( state=1 )
		currentTLFrame = mc.currentTime( q=1 )
	else:
		mc.currentTime( currentTLFrame )
		mc.play( state=0 )

# Run 'PlayStepped' mode
def playStepped():
	print 'stepped'
	global oTimeWarp
	global oTimeWrapStatus
	global obLTemp
	global nodeSTName
	try:
		nodeSTName
	except:
		nodeSTName = None
	obLTemp = mc.ls( sl=1 )
	tr = mc.ls( typ='transform' )
	if tr or obLTemp:
		minP = mc.playbackOptions( q=1, min=1 )
		maxP = mc.playbackOptions( q=1, max=1 )
		xList=[]
		try:
			if obLTemp:
				xCurves = mc.keyframe( obLTemp, q=1, name=1 )
			else:
				xCurves = mc.keyframe( tr, q=1, name=1 )
			xList = sorted( list( set( mc.keyframe( xCurves, q=1, tc=1, t=( minP,maxP ) ) ) ) )
		except TypeError:
			pass
		if xList:
			nodeSTName = 'tempStepCurve'
			mc.createNode('animCurveTT', n=nodeSTName)
			for x in xList:
				flX = float( x )
				mc.setKeyframe( nodeSTName, t=(flX,flX), v=flX )
				mc.keyTangent( nodeSTName, ott='step', t=(flX,flX) )
			oTimeWarp = mc.connectionInfo( 'time1.timewarpIn.timewarpIn_Raw', sourceFromDestination=1 )
			oTimeWrapStatus = mc.getAttr('time1.enableTimewarp')
			mc.connectAttr( nodeSTName + '.apply', 'time1.timewarpIn.timewarpIn_Raw',f=1)
			mc.setAttr('time1.enableTimewarp', 1)
			mc.play()
		else:
			return

def removeStep():
	global oTimeWarp
	global oTimeWrapStatus
	global obLTemp
	global nodeSTName
	try:
		if nodeSTName:
			if mc.objExists( nodeSTName ):
				mc.delete( nodeSTName )

		if (oTimeWarp!=''):
			mc.connectAttr( oTimeWarp, 'time1.timewarpIn.timewarpIn_Raw',f=1)
			mc.setAttr('time1.enableTimewarp', oTimeWrapStatus)
		mc.select( obLTemp, r=1 )
	except: pass

def loadSteppedScript( mod ):
	global currTime

	if mod is None:
		mod = mc.getModifiers()

	try:
		currTime
	except:
		currTime = None

	if not mc.play( q=1, state=1 ):
		if mod == 4:
			currTime = mc.currentTime( q=1 )
			mc.currentTime( mc.playbackOptions( q=1, min=1 ) )
		mc.scriptJob( ct=['playingBack',removeStep], runOnce=1 )
		playStepped()
	else:
		if currTime:
			mc.currentTime( currTime )
			currTime = None
		removeStep()
		mc.play( state=0 )
		if mc.modelEditor( mc.getPanel( wf=1 ), q=1, rnm=1 ) != 'base_OpenGL_Renderer':
			mc.ogs( reset=1 )
	ctrlsUI = mc.lsUI('MayaWindow',type='control')
	for ctrlUI in ctrlsUI:
		if ('symbolButton' in ctrlUI):
			if (mc.symbolButton(ctrlUI, q=1, c=1)=='playButtonForward'):
				mc.symbolButton(ctrlUI, e=1, c='import maya.mel; maya.mel.eval("play -state (!`play -q -state`);")')