Error with Glyphs.redraw() when multiple fonts are open

Glyphs
1

If I have 2+ fonts open, running Glyphs.redraw(), it raises this error:

File "GlyphsApp/GlyphsApp/__init__.py", line 1661, in __GSApp_redraw__
objc.error: NSGenericException - The window has been marked as needing another Display Window pass, but it has already had more Display Window passes than there are views in the window.

A snipped for testing:

from vanilla import Window
class A():
	def __init__(self):
		self.w = Window((500, 500), '')
		self.w.open()
		self.w.bind('close', self.remove_callbacks)
		Glyphs.addCallback(self.draw_foreground, DRAWFOREGROUND)
	
	def remove_callbacks(self, sender):
		Glyphs.removeCallback(self.draw_foreground, DRAWFOREGROUND)

	def draw_foreground(self, event1, event2):
		Glyphs.redraw()
A()

I figured I can redraw just the tab, but reporting the error just in case

2

Are you calling redraw directly in the draw foreground callback? That sounds not right, it will likely get fired a lot of times per second.

3

Good call! No, apparently just oversimplified too far for this piece