Kivy: EffectWidget in ScreenManager test

effecttest.py

import kivy
kivy.require('1.9.1')

from kivy.app import App
from kivy.lang import Builder
from kivy.uix.effectwidget import EffectWidget, PixelateEffect
from kivy.properties import StringProperty


class PixelLabel(EffectWidget):
	text = StringProperty()

	def __init__(self, **kwargs):
		super(PixelLabel, self).__init__(**kwargs)
		self.effects = [PixelateEffect()]

root = Builder.load_string('''
<PixelLabel>:
	Label:
		text: root.text
		bold: True

<LabelGrid@GridLayout>:
	cols: 4
	canvas.before:
		Color:
			rgba: 0.4, 0.5, 0.2, 1
		Rectangle:
			size: self.size
			pos: self.pos

	#PixelLabel:
	Label:
		text: 'One'

	Label:
		text: 'Two'

	Label:
		text: 'Three'

	Label:
		text: 'Four'

	Label:
		text: 'Five'

	Label:
		text: 'Six'

	Label:
		text: 'Seven'

	Label:
		text: 'Eight'

	Label:
		text: 'Nine'

	Label:
		text: 'Ten'

	Label:
		text: 'Eleven'

	Label:
		text: 'Twelve'

	Label:
		text: 'Thirteen'

	Label:
		text: 'Fourteen'

	Label:
		text: 'Fifteen'

	Label:
		text: 'Sixteen'

ScreenManager:
	Screen:
		name: 'labels'
		LabelGrid
''')


class TestApp(App):
	def build(self):
		return root

if __name__ == '__main__':
	TestApp().run()