Best Practices for Automatically Dismissing a Welcome Screen

[anzhi0708]

I have a MainApp class and a single custom Screen class, WelcomeScreen. This custom Screen is only used to display some welcome messages and is supposed to automatically disappear from the screen stack after 1 second, revealing the content of the App class. Using time.sleep in the on_mount method blocks the screen display. What are the best practices for achieving this effect?

[anzhi0708]

OK I think I just figured it out

from textual.app import App, ComposeResult
from textual.screen import Screen
from textual.widgets import Label, Button, Input
from textual.containers import Center, Middle, Vertical, Horizontal
from textual.message_pump import MessagePump


msg_pump = MessagePump()


class WelcomeScreen(Screen):

    def compose(self):
        with Center():
            with Middle():
                yield Label("Welcome")

    def on_mount(self):
        timer = msg_pump.set_timer(0.8, callback=lambda: self.app.pop_screen())

[davep]

Almost, although you've made it a bit more complicated than it needs to be. WelcomeScreen.on_mount can just be this:

def on_mount(self):
    self.set_timer(0.8, self.app.pop_screen)

For example:

from textual.app import App, ComposeResult
from textual.screen import Screen
from textual.widgets import Label

class Welcome(Screen):

    def compose(self) -> ComposeResult:
        yield Label("WELCOME!")

    def on_mount(self) -> None:
        self.set_timer(0.8, self.app.pop_screen)

class WelcomeScreenApp(App[None]):

    def compose(self) -> ComposeResult:
        yield Label("This is the main screen, you'll see it in a second")

    def on_mount(self) -> None:
        self.push_screen(Welcome())

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