Python, Kivy. Get text from dynamically created buttons with a dropdown

Question

I am dynamically creating buttons and dynamically creating a dropdown for each button. when the button is selected the text value updates on the main button. I want to get the

Answer 1

Use on_select event to pass the selected text to the method. Please refer to the snippets and example for details.

Snippets - kv file

<CustomDropDown>:
    on_select:
        app.root.ids.Notes.ids.mainbutton.text = '{}'.format(args[1])
        app.root.Run_Draws_Test(args[1])

Example

main.py

from kivy.app import App
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.uix.dropdown import DropDown
from kivy.uix.button import Button
from kivy.core.window import Window


Window.size = (800, 480)


class CustomDropDown(DropDown):

    def __init__(self, **kwargs):
        super(CustomDropDown, self).__init__(**kwargs)
        self.add_buttons()

    def add_buttons(self):
        for index in range(10):
            # When adding widgets, we need to specify the height manually
            # (disabling the size_hint_y) so the dropdown can calculate
            # the area it needs.

            btn = Button(text='Value %d' % index, size_hint_y=None, height=44)

            # for each button, attach a callback that will call the select() method
            # on the dropdown. We'll pass the text of the button as the data of the
            # selection.
            btn.bind(on_release=lambda btn: self.select(btn.text))

            # then add the button inside the dropdown
            self.add_widget(btn)


class Notes(Screen):
    pass


class MyScreenManager(ScreenManager):

    def Run_Draws_Test(self, value):
        print(value)


class TestApp(App):
    title = "Kivy Drop-Down List Demo"

    def build(self):
        return MyScreenManager()


if __name__ == '__main__':
    TestApp().run()

test.kv

#:kivy 1.10.0
#:import Factory kivy.factory.Factory

<CustomDropDown>:
    on_select:
        app.root.ids.Notes.ids.mainbutton.text = '{}'.format(args[1])
        app.root.Run_Draws_Test(args[1])


<Notes>:
    orientation: "vertical"

    FloatLayout:
        size_hint: None, None

        canvas.before:
            Color:
                rgba: 1, 1, 0, 1

        Button:
            id: mainbutton
            text: "Menu name"
            font_size: 20
            size_hint: None, None
            size: 150, 50
            pos: 20,400
            on_release: Factory.CustomDropDown().open(self)

<MyScreenManager>:
    canvas.before:
        Color:
            rgba: 0.5, 0.5, 0.5, 0.5
        Rectangle:
            pos: 0,0
            size: 800, 480
    Notes:
        id:Notes
        name: 'Notes'

Output