Kivy - [Critical] Warning too much iteration, when drawing Ellipse - user-interface

Question

I have been struggling recently creating a filled Circle in Kivy that stays a circle when the window is re-sized to a different width or height. I looked at the question here:
Centering an object in Kivy
But when I implement my Circle like so:
<BigCircle>
width: min(self.size)
height: min(self.size)
pos_hint: {'center_x': .5, 'center_y': .5}
canvas:
Color:
rgb: 1, 1, 0
Ellipse:
size: self.size
pos: self.pos
<MainScreen>:
FloatLayout
size: root.size
canvas:
Color:
rgb: 1, 1, 1
Rectangle:
size: self.size
BigCircle:
id: big_cir
class MainScreen(Screen):
pass
class MyApp(App):
def build(self):
sm = ScreenManager(transition=NoTransition())
sm.add_widget(MainScreen(name="Main"))
return sm
I get the error:
[Critical][Clock ]Warning, too much iteration done before the next frame. Check your code, or increase the Clock.max_iteration attribute
I am doing nothing with the Clock, but I am using a ScreenManager. Currently, MainScreen is the only screen. If I change the height/width to not include the min() then it works, but that is necessary to keep the Circle circular. Otherwise it becomes elongated when re-sized and looks bad.

Answer 1

The problem is you have an infinite loop due to BigCircle width and height being adjusted based on its size (width, height). Try changing your BigCircle to:
<BigCircle>
canvas:
Color:
rgb: 1, 1, 0
Ellipse:
size: min(self.size), min(self.size)
pos: root.center_x - min(self.size)/2, root.center_y - min(self.size)/2