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from textual.app import App, ComposeResult
from textual.widgets import Footer, Label, Tabs
NAMES = [
"Paul Atreidies",
"Duke Leto Atreides",
"Lady Jessica",
"Gurney Halleck",
"Baron Vladimir Harkonnen",
"Glossu Rabban",
"Chani",
"Silgar",
]
class TabsApp(App):
"""Demonstrates the Tabs widget."""
CSS = """
Tabs {
dock: top;
}
Screen {
align: center middle;
}
Label {
margin:1 1;
width: 100%;
height: 100%;
background: $panel;
border: tall $primary;
content-align: center middle;
}
"""
BINDINGS = [
("a", "add", "Add tab"),
("r", "remove", "Remove active tab"),
("c", "clear", "Clear tabs"),
]
def compose(self) -> ComposeResult:
yield Tabs(NAMES[0])
yield Label()
yield Footer()
def on_mount(self) -> None:
"""Focus the tabs when the app starts."""
self.query_one(Tabs).focus()
def on_tabs_tab_activated(self, event: Tabs.TabActivated) -> None:
"""Handle TabActivated message sent by Tabs."""
label = self.query_one(Label)
if event.tab is None:
# When the tabs are cleared, event.tab will be None
label.visible = False
else:
label.visible = True
label.update(event.tab.label)
def action_add(self) -> None:
"""Add a new tab."""
tabs = self.query_one(Tabs)
# Cycle the names
NAMES[:] = [*NAMES[1:], NAMES[0]]
tabs.add_tab(NAMES[0])
def action_remove(self) -> None:
"""Remove active tab."""
tabs = self.query_one(Tabs)
active_tab = tabs.active_tab
if active_tab is not None:
tabs.remove_tab(active_tab.id)
def action_clear(self) -> None:
"""Clear the tabs."""
self.query_one(Tabs).clear()
if __name__ == "__main__":
app = TabsApp()
app.run()
|
