For example, in Kivy language:
<MainToggle@ToggleButton>:
on_state: # something that will change the state of the sub-toggle
<SubToggle@ToggleButton>:
on_state: self.background_color = 0,0,0,1 # the sub-toggle button changes color
You can refer to other Widgets using the kivy id system. Observe the following code:
from kivy.base import runTouchApp
from kivy.lang import Builder
runTouchApp(Builder.load_string("""
<MainToggle@ToggleButton>:
<SubToggle@ToggleButton>:
on_state: self.background_color = 0,0,0,1 # the sub-toggle button changes color
BoxLayout:
MainToggle:
id: my_toggle1 # an id allows us to refer to this widget
text: "Main Toggle"
# change the other toggle's state using its id
on_state: my_toggle2.state = "down" if my_toggle2.state == "normal" else "normal"
SubToggle:
id: my_toggle2
text: "Sub Toggle"
"""))
Here's a superb video tutorial that uses the kivy id system in a practical example. Reply if you are having trouble wrapping your head around this.
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