Multiple widget changes based on one button event in Kivy - events

Question

I'm trying to build this application which contains multiple buttons. I can bind each button event to a callback but I am not able to change the state (namely the label) of any other button except for the one that fired the event. Does anyone know how to do this?

Answer 1

All you need is a reference to the other button, then you can do other_button.text = 'whatever'.
The way to do this depends on how you've constructed the program. For instance, if you constructed in the program in kv language, you can give your buttons ids with id: some_id and refer to them in the callback with stuff like on_press: some_id.do_something().
In pure python, you could keep references to the button in the parent class when you create them (e.g. self.button = Button()) so that the callback can reference self.button to change it. Obviously that's a trivial example, but the general idea lets you accomplish anything you want.

Answer 2

Probably not the official way, but try out the following code. It will change the text property of the buttons...
Ezs.kv file:
#:kivy 1.8.0
<Ezs>:
BoxLayout:
orientation: 'vertical'
padding: 0
spacing: 6
#choose
Button:
id: btn_1
text: 'text before'
on_press: btn_2.text = 'Whatever'
on_release: self.text = 'Who-Hoo'
#choose
Button:
id: btn_2
text: 'Press this'
on_release: self.text = 'HEEYY'
on_press: btn_1.text = 'text after'
.py file:
class Ezs(BoxLayout):
class EzsApp(App):
def build(self):
return Ezs
if __name__ == '__main__':
EzsApp().run()