Я использую Kivy и Kivymd. У меня проблема с передачей переменной между class Admin и class EditArticle. Мне нужно передать my_string от администратора в EditArticle. Я пытаюсь это сделать, но получаю пустую строку. Итак, в class Admin у меня my_string. Затем в методе edit_article из class Admin я устанавливаю значение 'некоторый текст' для my_string. Потом пытаюсь получить его методом edit из class EditArticle. Но он все время пуст. Я действительно не могу это понять.
- Если вы запустите мой код, вы нажмете на верхнее меню
admin. - Затем нажмите на любой
mdchip. - Затем нажмите кнопку etit в диалоговом окне.
- Затем нажмите кнопку, чтобы получить
my_string (но всегда пусто).
Это мой App.py
from kivy.clock import Clock
from kivymd.app import MDApp
from kivy.properties import StringProperty, NumericProperty
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.uix.boxlayout import BoxLayout
from kivymd.uix.card import MDCard
from kivymd.uix.chip import MDChip
from kivy.core.window import Window
Window.size = (600, 853)
from kivymd.uix.menu import MDDropdownMenu
from kivymd.theming import ThemableBehavior
from kivymd.uix.behaviors import RectangularElevationBehavior
from kivymd.uix.boxlayout import MDBoxLayout
from kivymd.uix.button import MDFlatButton
from kivymd.uix.dialog import MDDialog
class WindowManager(ScreenManager):
pass
class AdminFooter(ThemableBehavior, RectangularElevationBehavior, MDBoxLayout):
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.md_bg_color = self.theme_cls.primary_color
class ToolbarBack(ThemableBehavior, RectangularElevationBehavior, MDBoxLayout):
pass
class CustomToolbar(ThemableBehavior, RectangularElevationBehavior, MDBoxLayout):
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.md_bg_color = self.theme_cls.primary_color
Clock.schedule_once(self.create_menu, 1)
def create_menu(self, i):
self.items = ['admin', 'settings']
menu_items = [{"text": f"{i}"} for i in self.items]
self.menu = MDDropdownMenu(
caller=self.ids.button_2, items=menu_items, width_mult=4, callback=self.get_item
)
def get_item(self, instance):
self.menu.dismiss()
App.get_running_app().window_manager.current = instance.text
class Content(BoxLayout):
pass
class Admin(Screen):
dialog_get_article = None
my_string = StringProperty() # My string
def __init__(self, **kwargs):
super().__init__(**kwargs)
def get_article(self, instance,*args):
self.dialog_get_article = MDDialog(
title="Click the EDIT",
buttons=[
MDFlatButton(
text="EDIT",
on_release = self.edit_article
),
],
)
self.dialog_get_article.open()
def edit_article(self, instance):
self.my_string = 'some text' # set value
App.get_running_app().window_manager.current = 'edit-article'
self.dialog_get_article.dismiss()
def on_enter(self, *args):
data = [
{'id': 1, 'title': 'Arcicle 1', 'body': 'body of Article 1'},
{'id': 2, 'title': 'Arcicle 2', 'body': 'body of Article 2'},
{'id': 3, 'title': 'Arcicle 3', 'body': 'body of Article 3'}
]
for x in data:
chip = BlogChip(id=x.get('id'), title=x.get('title'), body=x.get('body'))
self.ids.box.add_widget(chip)
class EditArticle(Screen):
var = StringProperty()
def edit(self, instance):
print(self.var, ' << it is goingt to be <my_string> from Admin')
class UserSettings(Screen):
pass
class BlogChip(MDChip):
get_admin = Admin()
id = NumericProperty()
title = StringProperty()
body = StringProperty()
class BlogCard(MDCard):
pass
class Detail(Screen):
pass
class ResultSearch(Screen):
pass
class Container(Screen):
def __init__(self, **kwargs):
super().__init__(**kwargs)
Clock.schedule_once(self.create_cards)
def create_cards(self, i):
pass
class App(MDApp):
def callback(self):
self.window_manager.current = 'container'
def build(self):
self.theme_cls.primary_palette = 'Indigo'
self.window_manager = WindowManager()
return self.window_manager
App().run()
Мой app.kv
<WindowManager>
Container:
id: scr_1
name: 'container'
Detail:
id: scr_2
name: 'detail'
Admin:
id: scr_3
name: 'admin'
EditArticle:
id: scr_4
name: 'edit-article'
var: scr_3.my_string # <---------
ResultSearch:
id: scr_5
name: 'result-search'
UserSettings:
id: scr_6
name: 'settings'
<Admin>:
BoxLayout:
id: boxlayout_1
orientation: 'vertical'
MDToolbar:
pos_hint: {'top': 1}
title: 'Admin Blog'
left_action_items: [["arrow-left", lambda x: app.callback()]]
ScrollView:
MDStackLayout:
adaptive_height: True
padding: 10
spacing: dp(5)
id: box
<EditArticle>
MDToolbar:
title: 'Admin Blog'
MDLabel:
text: str(root.var)
MDRaisedButton:
text: 'click me to see a variable in console'
pos_hint: {'center_x': .5, 'center_y': .5}
on_release: root.edit(root)
<MyToolbar@CustomToolbar>:
size_hint_y: None
height: self.theme_cls.standard_increment
padding: "25dp"
spacing: "12dp"
MDLabel:
id: label
text: 'Blog'
font_style: 'H6'
theme_text_color: "Custom"
text_color: 1,1,1,1
Widget:
MDIconButton:
id: button_2
icon: "dots-vertical"
pos_hint: {"center_y": .5}
theme_text_color: "Custom"
text_color: 1,1,1,1
on_release: root.menu.open()
<Container>
BoxLayout:
orientation: 'vertical'
MyToolbar:
MDLabel:
text: 'Go To menu (dot-vertical/admin'
halign: 'center'
<BlogCard>
<Detail>:
<BlogChip>
label: root.title
icon: ''
callback: root.get_admin.get_article