Determine in which direction the Dismissible was dismissed

[ndonkoHenri]

Closes #2329

Code:

import flet as ft

def main(page):
    page.window_height, page.window_width = 370, 400
    page.theme_mode = ft.ThemeMode.LIGHT

    def handle_dismiss(e):
        lv.controls.remove(e.control)
        print(e.data)
        page.show_snack_bar(
            ft.SnackBar(
                content=ft.Text(f"Tile was dismissed in the {'right' if e.data == ft.DismissDirection.START_TO_END.value else 'left'} direction!"),
                behavior=ft.SnackBarBehavior.FLOATING,
            )
        )
        page.update()

    page.add(
        lv := ft.ListView(
            controls=[
                ft.Dismissible(
                    content=ft.ListTile(title=ft.Text(f"Item {i}")),
                    dismiss_direction=ft.DismissDirection.HORIZONTAL,
                    background=ft.Container(bgcolor=ft.colors.GREEN),
                    secondary_background=ft.Container(bgcolor=ft.colors.RED),
                    on_dismiss=handle_dismiss,
                    dismiss_thresholds={
                        ft.DismissDirection.HORIZONTAL: 0.1,
                        ft.DismissDirection.START_TO_END: 0.1
                    }
                )
                for i in range(5)
            ]
        )
    )


ft.app(target=main)

[FeodorFitsner]

Would you like to implement a "strongly-typed" event handler like, for example, Container.on_click: https://github.com/flet-dev/flet/blob/main/sdk/python/packages/flet-core/src/flet_core/container.py#L160-L165

so we have DismissibleDismissEvent with direction property of DismissDirection enum type, instead of working with string in e.data?