Cannot override shortcuts with insert key

[Tim-Cao]

from textual import on, work
from textual.app import App, ComposeResult, events
from textual.widgets import *
from textual.binding import Binding

class ScriptApp(App):
    BINDINGS = [
        Binding("ctrl+insert", "copy_to_clipboard"),
        Binding("ctrl+p", "print"),
    ]

    def compose(self) -> ComposeResult:
        yield Output()

    @work(exclusive=True, thread=True)
    def action_copy_to_clipboard(self) -> None:
        self.query_one(Output).begin_capture_print()

        print("Copy to clipboard...")

    @work(exclusive=True, thread=True)
    def action_print(self) -> None:
        self.query_one(Output).begin_capture_print()

        print("Ctrl + p...")

class Output(RichLog):
    def __init__(self) -> None:
        super().__init__(highlight=True, markup=True)

    @on(events.Print)
    def on_print(self, event: events.Print) -> None:
        if event.text.strip():
            self.write(event.text)


app = ScriptApp()

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

Run this app, the ctrl + insert binding doesn't work but ctrl + p works.

[davep]

Please see this FAQ.

[davep]

Your example code literally used a binding to attempt to run that action:

Binding("ctrl+insert", "copy_to_clipboard"),

I'll ask again: did you read the FAQ entry, do you understand what it's saying; did you follow the final bit of advice it gave?

[Tim-Cao]

@davep Yes, I read it.
Let's use this one

from textual import on, work
from textual.app import App, ComposeResult, events
from textual.widgets import *
from textual.binding import Binding


class ScriptApp(App):
    BINDINGS = [
        Binding("ctrl+insert", "copy_to_clipboard", show=False),
        Binding("shift+insert", "paste_from_clipboard"),
    ]

    def compose(self) -> ComposeResult:
        yield TextArea("Test Sceniaro 1:")
        yield Output()

    @work(exclusive=True, thread=True)
    def action_copy_to_clipboard(self) -> None:
        self.query_one(Output).begin_capture_print()

        print("Copy to clipboard...")


class Output(RichLog):
    def __init__(self) -> None:
        super().__init__(highlight=True, markup=True)

    @on(events.Print)
    def on_print(self, event: events.Print) -> None:
        if event.text.strip():
            self.write(event.text)


app = ScriptApp()

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

ctrl+insert doesn't work but shift+insert works
According to test key events, the insert key could trigger event

It's so weird, why ctrl+insert doesn't work?

Does this list mean the insert is out of support list?

[Tim-Cao]

It seems cannot override shortcuts with insert key

from textual import on, work
from textual.app import App, ComposeResult, events
from textual.widgets import *
from textual.binding import Binding


class ScriptApp(App):
    BINDINGS = [
        Binding("ctrl+insert", "copy_to_clipboard", show=False),
        Binding("shift+insert", "paste_from_clipboard"),
    ]

    def compose(self) -> ComposeResult:
        yield TextArea("Test Sceniaro 1:")
        yield Output()

    @work(exclusive=True, thread=True)
    def action_copy_to_clipboard(self) -> None:
        self.query_one(Output).begin_capture_print()

        print("Copy to clipboard...")

    @work(exclusive=True, thread=True)
    def action_paste_from_clipboard(self) -> None:
        self.query_one(Output).begin_capture_print()

        print("Paste to clipboard...")

class Output(RichLog):
    def __init__(self) -> None:
        super().__init__(highlight=True, markup=True)

    @on(events.Print)
    def on_print(self, event: events.Print) -> None:
        if event.text.strip():
            self.write(event.text)


app = ScriptApp()

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

[davep]

Does this list mean the insert is out of support list?

In my experience the insert key, and modified forms of it, are not fully-supported across the multitude of terminal emulators that are available. For example, here is insert, shift+insert and ctrl+insert as recorded under rio:

This isn't because of anything Textual is doing; this is because of what rio sends.

The advice given in the FAQ is there for the reason it states: not all key combinations will work under all terminal emulators, because of how those terminal emulators work (and sometimes because the keys are special to the host operating system).

[Tim-Cao]

I see. Thanks @davep