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from textual.app import App, ComposeResult
from textual.containers import Horizontal
from textual.reactive import reactive, var
from textual.widgets import Label
GREETINGS = [
"Bonjour",
"Hola",
"こんにちは",
"你好",
"안녕하세요",
"Hello",
]
class Greeter(Horizontal):
"""Display a greeting and a name."""
DEFAULT_CSS = """
Greeter {
width: auto;
height: 1;
& Label {
margin: 0 1;
}
}
"""
greeting: reactive[str] = reactive("")
who: reactive[str] = reactive("")
def __init__(self, greeting: str = "Hello", who: str = "World!") -> None:
super().__init__()
self.set_reactive(Greeter.greeting, greeting) # (1)!
self.set_reactive(Greeter.who, who)
def compose(self) -> ComposeResult:
yield Label(self.greeting, id="greeting")
yield Label(self.who, id="name")
def watch_greeting(self, greeting: str) -> None:
self.query_one("#greeting", Label).update(greeting)
def watch_who(self, who: str) -> None:
self.query_one("#who", Label).update(who)
class NameApp(App):
CSS = """
Screen {
align: center middle;
}
"""
greeting_no: var[int] = var(0)
BINDINGS = [("space", "greeting")]
def compose(self) -> ComposeResult:
yield Greeter(who="Textual")
def action_greeting(self) -> None:
self.greeting_no = (self.greeting_no + 1) % len(GREETINGS)
self.query_one(Greeter).greeting = GREETINGS[self.greeting_no]
if __name__ == "__main__":
app = NameApp()
app.run()
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