8997615430
Use a special value to flag a blank selection, add methods is_blank and clear, slightly refactor the way the widget is setup to avoid having attributes _initial_options and _options. Implement exceptions to be raised when the widget is entering bad state.
38 lines
1 KiB
Python
38 lines
1 KiB
Python
from textual import on
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from textual.app import App, ComposeResult
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from textual.widgets import Header, Select
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LINES = """I must not fear.
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Fear is the mind-killer.
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Fear is the little-death that brings total obliteration.
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I will face my fear.
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I will permit it to pass over me and through me.""".splitlines()
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ALTERNATE_LINES = """Twinkle, twinkle, little star,
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How I wonder what you are!
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Up above the world so high,
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Like a diamond in the sky.
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Twinkle, twinkle, little star,
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How I wonder what you are!""".splitlines()
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class SelectApp(App):
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CSS_PATH = "select.tcss"
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BINDINGS = [("s", "swap", "Swap Select options")]
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def compose(self) -> ComposeResult:
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yield Header()
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yield Select(zip(LINES, LINES), allow_blank=False)
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@on(Select.Changed)
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def select_changed(self, event: Select.Changed) -> None:
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self.title = str(event.value)
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def action_swap(self) -> None:
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self.query_one(Select).set_options(zip(ALTERNATE_LINES, ALTERNATE_LINES))
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if __name__ == "__main__":
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app = SelectApp()
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app.run()
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