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26 lines
636 B
Python
26 lines
636 B
Python
from textual.app import App, ComposeResult
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from textual.widgets import Button, Input
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class PreventApp(App):
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"""Demonstrates `prevent` context manager."""
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def compose(self) -> ComposeResult:
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yield Input()
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yield Button("Clear", id="clear")
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def on_button_pressed(self) -> None:
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"""Clear the text input."""
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input = self.query_one(Input)
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with input.prevent(Input.Changed): # (1)!
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input.value = ""
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def on_input_changed(self) -> None:
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"""Called as the user types."""
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self.bell() # (2)!
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if __name__ == "__main__":
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app = PreventApp()
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app.run()
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