Ich versuche ein Feld zu aktualisieren, das auf einem anderen Bildschirm existiert, aber nicht erfolgreich ist. Ich wäre sehr sehr erfreut, wenn mir jemand sagen könnte, was ich hier falsch mache. Wie Objekte in anderen Bildschirmen mit dem kivy screenmanager referenziert werden
myscreenskv.py:
style = r'''
# File: myscreenskv.py
#: import myscreens myscreens
<ScreenManagement>:
MainScreen:
Screen1:
Screen2:
<MainScreen>:
name: 'main'
mainlog:mainlog
id: scrmain
BoxLayout:
orientation: "vertical"
Label:
text: "Main"
Label:
id: mainlog
Button:
text: "go to screen 1"
on_press:
app.root.current = "screen1"
root.action1()
Button:
text: "go to screen 2"
on_press:
app.root.current = "screen2"
root.action2()
<Screen1>:
name: 'screen1'
sc1log:sc1log
id: scr1
BoxLayout:
orientation: "vertical"
Label:
text: "Screen1"
Label:
id: sc1log
Button:
text: "go to main screen"
on_press: app.root.current = "main"
Button:
text: "go to screen 2"
on_press: app.root.current = "screen2"
<Screen2>:
name: 'screen2'
id: scr2
sc2log:sc2log
BoxLayout:
orientation: "vertical"
Label:
text: "Screen2"
Label:
id: sc2log
Button:
text: "go to main screen"
on_press: app.root.current = "main"
Button:
text: "go to screen 1"
on_press: app.root.current = "screen1"
'''
Py:
from kivy.app import App
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.lang import Builder
from myscreenskv import style
class MainScreen(Screen):
def __init__(self, **kwargs):
super(MainScreen, self).__init__(**kwargs)
def action1(self):
self.ids.scr1.sc1log.text = 'Coming from main'
def action2(self):
self.ids.scr2.sc2log.text = 'Coming from main'
class Screen1(Screen):
def __init__(self, **kwargs):
super(Screen1, self).__init__(**kwargs)
def action1(self):
self.ids.main.mainlog.text = 'Coming from screen1'
def action2(self):
self.ids.scr2.sc2log.text = 'Coming from screen1'
class Screen2(Screen):
def __init__(self, **kwargs):
super(Screen2, self).__init__(**kwargs)
def action1(self):
self.ids.main.mainlog.text = 'Coming from screen2'
def action2(self):
self.ids.scr1.sc1log.text = 'Coming from screen2'
class MyscreensApp(App):
def build(self):
Builder.load_string(style)
sm = ScreenManager()
sm.add_widget(MainScreen())
sm.add_widget(Screen1())
sm.add_widget(Screen2())
sm.current = 'main'
return sm
if __name__ == '__main__':
MyscreensApp().run()
Sehr geehrte KeyWeeUsr, Frohes neues Jahr und vielen Dank für die klare Klärung. Jetzt verstehe ich :) –