Is it possible to override default widget bindings?

[asmith26]

I'm trying to add the ability to delete entire words at a time within an Input widget using the key bindings Ctrl+backspace and Ctrl+delete, but unfortunately the following doesn't seem to work:

from textual.binding import Binding
from textual.widgets import Input
from textual.app import App, ComposeResult


class CustomInput(Input):
    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        self.BINDINGS += [
            Binding("ctrl+backspace", "delete_left_word", "delete left to start of word", show=False),
            Binding("ctrl+delete", "delete_right_word", "delete right to end of word", show=False),
        ]


class MainApp(App):
    def compose(self) -> ComposeResult:
        yield CustomInput(placeholder="How can I help?")


if __name__ == "__main__":
    app = MainApp()
    app.run()

Not sure if you can see what/if I'm doing something wrong? Many thanks for any help, and this amazing lib!

[TomJGooding]

Bindings are inherited by default, so you don't need to mess with __init__. Here's a quick example - notice that the arrow keys still work to navigate the table:

from textual.widgets import DataTable
from textual.app import App, ComposeResult


class ViLikeDataTable(DataTable):
    BINDINGS = [
        ("j", "cursor_down", "Down"),
        ("k", "cursor_up", "Up"),
        ("h", "cursor_left", "Left"),
        ("l", "cursor_right", "Right"),
    ]


class ExampleApp(App):
    def compose(self) -> ComposeResult:
        yield ViLikeDataTable()

    def on_mount(self) -> None:
        table = self.query_one(DataTable)
        table.add_columns("C1", "C2", "C3")
        table.add_row(*("R1C1", "R1C2", "R1C3"))
        table.add_row(*("R2C1", "R2C2", "R2C3"))
        table.add_row(*("R3C1", "R3C2", "R3C3"))


if __name__ == "__main__":
    app = ExampleApp()
    app.run()

You might find some key combinations don't make it to the app - see the FAQ: https://textual.textualize.io/FAQ/#why-do-some-key-combinations-never-make-it-to-my-app