Я новичок в kivy и не понимаю, почему моя кнопка в ящике навигации не переключается на другой класс в kivymd. При нажатии кнопки в классе ContentNavigationDrawer я хочу, чтобы она переключилась на другой экран. Не понимаю, почему не меняется, я уже прочитал документацию о ScreenManager, но все еще не могу понять
, это мой код main.py
from kivy.clock import Clock
from kivy.properties import StringProperty
from kivy.uix.screenmanager import Screen, ScreenManager
from kivymd.app import MDApp
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.floatlayout import FloatLayout
class AboutUs(Screen):
pass
class Share(FloatLayout):
data = {
"facebook": "Facebook",
"whatsapp": "WhatsApp",
"instagram": "Instagram",
}
def callback(self, instance):
print('Hello')
print(instance.icon)
class ContentNavigationDrawer(BoxLayout):
def hllo(self):
print('Hello though')
class MainScreen(FloatLayout):
def quote(self, *args):
self.quote_text = 'I often think that the night is more alive and more richly colored than
the day. -Vincent van Gogh '
quote_text = StringProperty()
class TtApp(MDApp):
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.title = "Story A Day"
self.theme_cls.theme_style = "Light"
def build(self):
self.theme_cls.primary_palette = "Blue" # "Purple", "Red"
main = MainScreen()
Clock.schedule_once(main.quote, 5)
if __name__ == '__main__':
TtApp().run()
и это мой файл main.kv
Screen:
AboutUs:
MainScreen:
NavigationLayout:
ScreenManager:
Screen:
BoxLayout:
orientation: 'vertical'
MDToolbar:
title: "Quote"
anchor_title: 'left'
elevation: 10
left_action_items: [['menu', lambda x: nav_drawer.set_state()]]
mode: "free-center"
Widget:
MDNavigationDrawer:
title: 'Quote'
id: nav_drawer
swipe_distance: 10
ContentNavigationDrawer:
id: content_drawer
<ContentNavigationDrawer>
name: 'main'
background_color: 2, 3, 4, 5
orientation: "vertical"
padding: "8dp"
spacing: "8dp"
AnchorLayout:
anchor_x: "right"
size_hint_y: None
height: avatar.height
Image:
id: avatar
size_hint: None, None
size: "56dp", "56dp"
source: "data/logo/kivy-icon-256.png"
MDLabel:
anchor_y: 'left'
text: "[b]Story A Day[/b]"
theme_text_color: "Custom"
text_color: 0, 0, 0, 1
markup: True
font_style: "H4"
size_hint_y: None
height: self.texture_size[1]
MDRaisedButton:
md_bg_color: 0, 0, 0, 1
text: 'You Can'
on_release: root.hllo()
MDRaisedButton:
text: 'Click Me'
on_release: print('Hell')
MDLabel:
text: 'Story A Day'
font_style: "Button"
size_hint_y: None
height: self.texture_size[1]
OneLineAvatarListItem:
text: "About Us"
IconLeftWidget:
icon: "information"
Button:
text: 'hello'
on_release: app.root.manager.current = 'Abt'
ScrollView:
<MainScreen>:
canvas:
Color:
rgba: 0, 0, 0, 1
Rectangle:
pos: self.pos
size: self.size
Label:
id: quote
text: root.quote_text
font_size: '20sp'
size: self.texture_size
pos_hint: {'x': -0.2, 'y': 0.27}
<AboutUs>:
name: 'Abt'
Label:
text: 'Hellooo'