from maya import cmds

win_name = 'rig_blendShapeManager'
text_scoll_list_name = 'bsm_tsl'
slider_name = 'bsm_slider'

def blend_shape_manager_UI():
	if cmds.window(win_name, q=True, ex=True):
		cmds.deleteUI(win_name)
	cmds.window(win_name, t="Blend Shape Manager")
	cmds.columnLayout()
	cmds.textScrollList(
		text_scoll_list_name,
		sc=blend_shape_manager_connect,
		dcc=blend_shape_manager_activate,
		ams=True)
	cmds.floatSliderGrp(slider_name, field=True, minValue=0.0, maxValue=1.0, value=0)
	cmds.button(l="Refresh", c=blend_shape_manager_update)
	cmds.button(l="Reset", c=blend_shape_manager_reset)
	cmds.setParent("..")
	cmds.showWindow(win_name)


def blend_shape_manager_update(*args):
	blend_shape_node = get_blend_shape_node()
	attributes = cmds.listAttr(blend_shape_node + ".weight", m=True)
	cmds.textScrollList(text_scoll_list_name, e=True, removeAll=True)
	cmds.textScrollList(text_scoll_list_name, e=True, append=attributes)

def blend_shape_mappnager_reset(*args):
	blend_shape_node = get_blend_shape_node()
	attributes = cmds.listAttr(blend_shape_node + ".weight", m=True)
	for attr in attributes:
		cmds.setAttr(blend_shape_node + '.' + attr, 0)

def get_blend_shape_node():
	selection = cmds.ls(sl=True)
	history_list = cmds.listHistory(selection[0])
	for node in history_list:
		if cmds.nodeType(node) == "blendShape":
			return node


def blend_shape_manager_activate():
	blend_shape_node = get_blend_shape_node()
	selected = cmds.textScrollList(text_scoll_list_name, q=True, si=True)
	cmds.setAttr(blend_shape_node + '.' + selected[0], 1)

def blend_shape_manager_connect():
	blend_shape_node = get_blend_shape_node()
	selected = cmds.textScrollList(text_scoll_list_name, q=True, si=True)
	attributes = [blend_shape_node + '.' + attr for attr in selected]
	cmds.connectControl(slider_name, *attributes)

blend_shape_manager_UI()