Centering MDlist Text under ScrollView KivyMD

Question

I am struggling to center the text in ScrollView.

My KV code is the following :

from kivy.uix.scrollview import ScrollView
from kivymd.app import MDApp
from kivymd.uix.list import MDList, OneLineListItem

kv =""""
    ScrollView:
        do_scroll_x: False  # Important for MD compliance
        MDList:
            OneLineListItem:
                text: "Single-line item"
"""

class MainApp(MDApp):
    def build(self):
        sv = ScrollView()
        ml = MDList()
        sv.add_widget(ml)
        contacts = ["Paula", "John", "Kate", "Vlad"]
        for c in contacts:
            ml.add_widget(
                OneLineListItem(
                    text=c
                )
            )
        return sv

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

This is what the screen looks like :

Please help!

Answer 1

One way to do it, is to subclass the OneLineListItem, so you can add a halign argument for horizontal alignment:

class OneLineListItemAligned(OneLineListItem):
    def __init__(self, halign, **kwargs):
        super(OneLineListItemAligned, self).__init__(**kwargs)
        self.ids._lbl_primary.halign = halign


class MainApp(MDApp):
    def build(self):
        sv = ScrollView()
        ml = MDList()
        sv.add_widget(ml)
        contacts = ["Paula", "John", "Kate", "Vlad"]
        for c in contacts:
            ml.add_widget(OneLineListItemAligned(halign="center", text=c))
        return sv

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

P.S. The kv part of the code is not used in your example...