Nahrungstracker/app/main.py

import flet as ft
from pages.home import Home
from pages.history import History
from pages.settings import Settings
from flet import app

def main(page: ft.Page):
    page.title = "Nahrungstracker"
    page.scroll = True

    history_instance = History()  # Erstellen der History-Instanz

    home = Home(history_instance)  # Übergeben der History-Instanz an Home
    home.page = page

    settings = Settings()
    settings.page = page

    def on_navigation_change(e):
        page.controls.clear()
        if e.control.selected_index == 0:
            page.appbar = home.create_appbar()
            page.add(home)
        elif e.control.selected_index == 1:
            page.appbar = ft.AppBar(title=ft.Text("History"))
            history_instance.update_history_view()
            page.add(history_instance)  # Hinzufügen der History-Instanz zur Seite
        elif e.control.selected_index == 2:
            page.appbar = ft.AppBar(title=ft.Text("Settings"))
            page.add(settings)
        page.update()

    page.navigation_bar = ft.NavigationBar(
        destinations=[
            ft.NavigationDestination(icon=ft.icons.HOME, label="Home"),
            ft.NavigationDestination(icon=ft.icons.HISTORY, label="History"),
            ft.NavigationDestination(icon=ft.icons.SETTINGS, label="Settings")
        ],
        on_change=on_navigation_change,
    )

    page.appbar = home.create_appbar()
    page.add(home)
    page.update()

if __name__ == "__main__":
    print("run")
    app(target=main)