Kivy ScrollView - Not Scrolling

Question

Looks like a common problem people have with Kivy. I've already checked other questions for the same problem here on SO but no luck.

I have a container BoxLayout:

class Cnt(BoxLayout):
    pass

In the .kv file I've got something like this:

<Cnt>:
    orientation: 'vertical'
    ScrollView:
        size_hint: (1, .9)
        StackLayout:
            padding: 5
            size_hint_y: None
            id: content_layout
            minimum_height: self.height
            ARow:
            ARow:
            ARow:
            ARow:
            ARow:
            ARow:
            ARow:
            ARow:
            ARow:
            ARow:
            ARow:
            ARow:
            ARow:
            ARow:
            ARow:
    BoxLayout:
        size_hint: (1, .1)
        Label:
            text: 'A'

ARow is a BoxLayout with a CheckBox and a Label. It has:

size_hint: (1, None)
height: 40

As far as I understand these are the only two important things that could do something to the scrolling.

minimum_height: self.height is the same as if I would bind the minimum_height and height of the StackLayout in Python code if I understood it right.

Answer 1

Change

minimum_height: self.height

to

height: self.minimum_height

The minimum_height is what's calculated as needed for all the children. You want the actual height to be equal to the minimum height, even if it's larger than the parent's height (for scrolling, this is exactly what you want).