[MDExpansionPanel]

Boa tarde, pessoal vejam se alguém pode me dar uma força, já tentei de um tudo e não consego descobrir o que estou fazendo de errado, não consigo fazer os itens serem exibidos. este codigo sera modificado depois para exibir os itens finais, segue...

 

#TelaConsultaPro.py

from kivymd.uix.screen import MDScreen
from kivy.uix.screenmanager import SlideTransition
from kivymd.uix.expansionpanel import MDExpansionPanel, MDExpansionPanelThreeLine
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.label import Label
from kivy.uix.button import Button

class TelaConsultaPro(MDScreen):
    
    def transicao_tela(self, tela):
        self.manager.transition = SlideTransition(direction="right")
        self.manager.current = tela

    def on_start(self):
    
        for i in range(10):
            panel = MDExpansionPanel(text="Painel " + str(i))
            content = BoxLayout(orientation="vertical")
            content.add_widget(Label(text="Conteúdo do painel " + str(i)))
            content.add_widget(Button(text="Botão " + str(i)))
            panel.content = content
            self.ids.box.add_widget(panel)

#TelaConsultaPro.kv

<TelaConsultaPro>:
    MDBoxLayout:
        orientation: 'vertical'

        MDTopAppBar:
            title: "Cadastro"
            left_action_items: [["menu", lambda x: app.callback()]]
            right_action_items: [["arrow-left", lambda x: root.transicao_tela("TelaPrincipal")]]
            elevation: 10
            md_bg_color: "#000000"
            specific_text_color: "white"

        MDScrollView:
            MDGridLayout:
                id: box
                cols: 1
                adaptive_height: True               
               
        MDTopAppBar:
            type: "bottom"
            mode: "free-end"
            elevation: 10
            md_bg_color: "#000000"

 

[Ajuda com Kivy]

Não consigo fazer esse menu DropDown funcionar de jeito algum, alguém poderia me ajudar mostrando o que fiz de errado?

este é o meu .py

#controle.py


from kivy.lang import Builder
from kivymd.app import MDApp
from kivymd.uix.boxlayout import MDBoxLayout
from kivy.uix.screenmanager import ScreenManager, Screen
from kivymd.uix.menu import MDDropdownMenu

from kivy.metrics import dp
from kivy.properties import StringProperty
from kivymd.uix.list import OneLineIconListItem


class IconListItem(OneLineIconListItem):
    icon = StringProperty()

    
class MainTela(ScreenManager):
    pass


class TelaLogin(Screen):
    pass


class TelaMenu(Screen):
    pass


class TelaConsulta(Screen):  
    def popup(self):
        
        menu_items = [
            {
                "viewclass": "IconListItem",
                "icon": "git",
                "text": f"Item {i}",
                "height": dp(56),
                "on_release": lambda x=f"Item {i}": self.set_item(x),
            } for i in range(5)
        ]
        
        self.menu = MDDropdownMenu(
            caller=self.TelaConsulta.ids.drop_item,
            items=menu_items,
            position="center",
            width_mult=4,
        )

        menu_items = [
            {
                "viewclass": "IconListItem",
                "icon": "git",
                "text": f"Item {i}",
                "height": dp(56),
                "on_release": lambda x=f"Item {i}": self.set_item(x),
            } for i in range(5)
        ]

        self.menu.bind()
        
    def set_item(self, text_item):
        self.TelaConsulta.ids.drop_item.set_item(text_item)
        self.menu.dismiss()

    def build(self):
        return self.TelaConsulta


       
class TelaCadastro(Screen):
    pass


class Controle(MDApp):
    pass
    

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

este é o meu .kv

#controle.kv
MainTela:

    TelaLogin:
    TelaMenu:
    TelaConsulta:
       
    TelaCadastro:
        name:'TelaCadastro'
    
<TelaLogin@FloatLayout>:
    name: 'TelaLogin'

    Image:
        source: "logo.png"
        allow_stretch: True
        size_hint: 0.3, 0.3
        pos_hint: {"center_x": 0.5, "center_y": 0.8}
    
    MDTextField:
        pos_hint: {"center_x": 0.5, "center_y": 0.6}
        size_hint_x: 0.5
        hint_text:"Digite o usuário"
        
    MDTextField:
        pos_hint: {"center_x": 0.5, "center_y": 0.5}
        size_hint_x: 0.5
        hint_text:"Digite a senha"
        password: True

    MDRoundFlatButton:
        pos_hint: {"center_x": 0.5, "center_y": 0.4}
        size_hint_x: 0.5
        text:"Confirmar"
        text_color:"gray"
        on_release: app.root.current = 'TelaMenu'

    MDLabel:
        text: "By Phvbrito"
        pos_hint: {"center_x": 0.9, "center_y": 0.05}


<TelaMenu@FloatLayout>:
    name:'TelaMenu'

    MDTopAppBar:
        title: 'Controle'
        pos_hint: {'center_x': 0.5, 'center_y': 0.9}
        left_action_items: [['menu', lambda x: app.stop()]]
        right_action_items: [['logout', lambda x: app.stop()]]

    MDRaisedButton:
        font_size: 25
        text: "Consulta"
        md_bg_color: "red"
        size_hint: (.3, .3)
        pos_hint: {"center_x": 0.3, "center_y": 0.6}
        on_release: app.root.current = 'TelaConsulta'
        
    MDRaisedButton:
        font_size: 25
        text: "Cadastro"
        md_bg_color: "red"
        size_hint: (.3, .3)
        pos_hint: {"center_x": 0.7, "center_y": 0.6}
        on_release: app.root.current = 'TelaCadastro'
    
    MDRaisedButton:
        font_size: 25
        text: "Sair"
        md_bg_color: "red"
        size_hint: (.3, .3)
        pos_hint: {"center_x": 0.5, "center_y": 0.2}
        on_release: app.stop()

<TelaCadastro@FloatLayout>:
    name:'TelaCadastro'
   
    MDTopAppBar:
        title: 'Cadastro'
        pos_hint: {'center_x': 0.5, 'center_y': 0.9}
        left_action_items: [['menu', lambda x: app.stop()]]
        right_action_items: [['logout', lambda x: app.stop()]]
    
    MDTopAppBar:
        pos_hint: {'center_x': 0.5, 'center_y': 0.05}
        left_action_items: [['arrow-left', lambda x: setattr(root.manager, 'current', 'TelaMenu')]]
    
    MDRaisedButton:
        font_size: 25
        text: "Piso"
        md_bg_color: "red"
        size_hint: (.3, .3)
        pos_hint: {"center_x": 0.3, "center_y": 0.65 }

    MDRaisedButton:
        font_size: 25
        text: "Vinilico"
        md_bg_color: "red"
        size_hint: (.3, .3)
        pos_hint: {"center_x": 0.7, "center_y": 0.65 }

    MDRaisedButton:
        font_size: 25
        text: "Rejuntes"
        md_bg_color: "red"
        size_hint: (.3, .3)
        pos_hint: {"center_x": 0.3, "center_y": 0.3 }

    MDRaisedButton:
        font_size: 25
        text: "Rodapé"
        md_bg_color: "red"
        size_hint: (.3, .3)
        pos_hint: {"center_x": 0.7, "center_y": 0.3 }

<TelaConsulta@FloatLayout>
    name: 'TelaConsulta'
    
    MDTopAppBar:
        title: 'Controle'
        pos_hint: {'center_x': 0.5, 'center_y': 0.9}
        left_action_items: [['menu', lambda x: app.stop()]]
        right_action_items: [['logout', lambda x: app.stop()]]

    MDScreen:
        MDDropDownItem:
            id: drop_item
            pos_hint: {'center_x': .5, 'center_y': .5}
            text: 'Item 0'
            on_release: app.menu.open()

<IconListItem>
    IconLeftWidget:
        icon: root.icon