python - Get text of variable from a different Class

Question

I am trying to get the Text from a variable which is located inside a function inside a different class. The variable gets its text value from an MDTextField from KivyMD. I've tried two approaches: getting the value directly with the MDTextField id and calling giving a variable the value of such text.

I believe the solution is really simple however I have not been able to do this correctly.

CODE FOR MINIMAL REPRODUCIBLE EXAMPLE

PYTHON FILE:

from kivy.properties import ObjectProperty
from kivy.uix.screenmanager import ScreenManager, Screen
from kivymd.app import MDApp
from kivymd.uix.expansionpanel import MDExpansionPanel, MDExpansionPanelOneLine
from kivy.uix.boxlayout import BoxLayout
from kivymd.uix.menu import MDDropdownMenu
from kivy.clock import Clock


class ActivityContent(BoxLayout):
    menu = None
    dropdown_value = ObjectProperty(None)

    def dropdown_activity(self):
        # Create the drop down menu
        actividades = ["Correo electrónico", "Hora Regreso a Oficina", "Hora Salida de Oficina",
                   "Llamada de cortesia", "Llamada de Presentación", "Llamada de Promoción",
                   "Seguimiento a Cotización", "Traslado", "Visita a Cliente", "Whatsapp"]
        menu_items = [{"text": f"{actividad}"} for actividad in actividades]
        self.menu = MDDropdownMenu(
            caller=self.ids.dropdown_Actividades,
            items=menu_items,
            width_mult=5,
        )
        self.menu.open()
        self.menu.bind(on_release=self.set_item)

    def set_item(self, instance_menu, instance_menu_item):
        def set_item(interval):
            self.ids.dropdown_Actividades.text = instance_menu_item.text
            self.dropdown_value = self.ids.dropdown_Actividades.text
            instance_menu.dismiss()
            print(self.dropdown_value)
        Clock.schedule_once(set_item, 0.5)


class AdditionalCommentsContent(BoxLayout):
    def complete_registration(self):
        print(ActivityContent.dropdown_value)  


class IngActivWindow(Screen):
    activity_container = ObjectProperty(None)

    def activity_expansion_panel(self):
        self.ids.activity_container.clear_widgets()
        # Informacion de Actividad PANEL
        self.ids.activity_container.add_widget(
            MDExpansionPanel(icon="images/infoActividad.png", content=ActivityContent(),
                             panel_cls=MDExpansionPanelOneLine(
                                 text="Información de Actividad")))
        # Comentarios Adicionales PANEL
        self.ids.activity_container.add_widget(
            MDExpansionPanel(icon="images/comentarios.png", content=AdditionalCommentsContent(),
                             panel_cls=MDExpansionPanelOneLine(
                                 text="Comentarios Adicionales")))


class MainMenuWindow(Screen):
    pass


class WindowManager(ScreenManager):
    pass


class ReproducibleExample(MDApp):

    def build(self):
        self.theme_cls.primary_palette = "Teal"
        return WindowManager()


if __name__ == "__main__":
    ReproducibleExample().run()

KV FILE:

<WindowManager>:
    id: screen_manager
    MainMenuWindow:
        id: main
        name: 'main'
    IngActivWindow:
        id: ingActiv
        name: 'ingActiv'


<MainMenuWindow>
    MDRaisedButton:
        text: 'Enter'
        pos_hint: {'center_x': 0.5, 'center_y': 0.5}
        on_press:
            root.manager.current = 'ingActiv'
            root.manager.transition.direction =  'right'

<IngActivWindow>:
    name: 'ingActiv'
    on_pre_enter: root.activity_expansion_panel()

    FloatLayout:
        cols:1
        GridLayout:
            id: activity_container
            size_hint: 1, None
            cols: 1
            height: self.minimum_height
            pos_hint: {'center_x': 0.5, 'center_y': 0.5}


<ActivityContent>:
    size_hint: 1, None
    height: self.minimum_height
    orientation: 'vertical'
    padding: "15dp", "25dp", "15dp", "5dp"

    # TIPO DE ACTIVIDAD
    MDBoxLayout:
        orientation: 'horizontal'
        padding: "15dp", "5dp", "15dp", "5dp"
        spacing: "5dp"
        adaptive_height: True
        size_hint: 1, None

        MDTextField:
            id: dropdown_Actividades
            write_tab: False
            size_hint: 1, None
            pos_hint: {"x": 0, "center_y": 0.5}
            icon_right: 'arrow-down-drop-circle-outline'
            hint_text: 'Seleccionar Tipo de Actividad'
            write_tab: False
            enabled: False
            on_focus: if self.focus: root.dropdown_activity()
        MDBoxLayout:
            size_hint_x: 0.1

<AdditionalCommentsContent>:
    size_hint: 1, None
    height: self.minimum_height
    orientation: 'vertical'
    adaptive_height: True

    MDRaisedButton:
        text: "Registrar Actividad"
        size_hint: None, None
        pos_hint: {'center_x': 0.5, 'center_y': 0.5}
        font_size: 12.5
        on_release:
            root.complete_registration()

The problem lies in the complete_registration function, inside the AdditionalCommentsContent class. I am trying to use the dropdown_value text. However instead of printing its actual value (like in the set_item function inside the ActivityContent class), it just prints <ObjectProperty name=dropdown_value>. If I try with ActivityContent.dropdown_value.text I get the following error:

AttributeError: 'kivy.properties.ObjectProperty' object has no attribute 'text'

As I mentioned before, I tried the self.ids.dropdown_Actividades.text approach but this also didn't work.

How can I get the actual text value from this MDTextField?

Thanks a lot in advance.

question from:https://stackoverflow.com/questions/65833561/get-text-of-variable-from-a-different-class

Answer 1

Waitting for answers