An observer script to sync background layers with foreground layer

syncLayerWidths.py

from mojo.events import addObserver, removeObserver

class syncLayerWidths:

	def __init__(self):
		self.font = None
		self.glyph = None

		addObserver(self, "glyphChanged", "currentGlyphChanged")

	# --------- from Tal's RoboHud ---------------
	
	def beginObservingGlyph(self):
		if self.glyph is not None:
			self.glyph.addObserver(self, "widthChanged", "Glyph.WidthChanged")

	def stopObservingGlyph(self):
		self.glyph = CurrentGlyph()
		if self.glyph is not None:
			self.font = self.glyph.font
			self.glyph.removeObserver(self, "Glyph.Changed")

	# --------------------------------------------

	def glyphChanged(self,info):

		self.stopObservingGlyph()
		self.beginObservingGlyph()


	def widthChanged(self,point):
		if self.glyph:
			for layerGlyph in self.glyph.layers:
			    layerGlyph.width = self.glyph.width
			    

syncLayerWidths()