Textualize/textual

SelectionList weird behavior when removing options in its own event handler until freeze

Closed this issue · 2 comments

jvllmr commented

When you interact with a SelectionList and remove the option in one of the event handlers one of the following happens:

  • Wrong options is removed
  • Option just deselects
  • Entire component just freezes (not the entire app; most likely occurs with the first or last option in the Selection List)

Example code:

from textual.app import App
from textual.widgets import SelectionList
from textual.widgets.selection_list import Selection
from textual.widget import Widget
import typing as t
from string import ascii_letters


class MyApp(App[str]):
    def compose(self) -> t.Iterable[Widget]:
        yield SelectionList(
            *[Selection(letter, letter, True, letter) for letter in ascii_letters],
        )

    def on_selection_list_selection_toggled(
        self, event: SelectionList.SelectionToggled[str]
    ) -> None:
        id_ = event.selection.id
        if id_ is not None:
            event.selection_list.remove_option(id_)


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

It will be helpful if you run the following command and paste the results:

Textual Diagnostics

Versions

Name Value
Textual 0.58.0
Rich 13.7.1

Python

Name Value
Version 3.11.2
Implementation CPython
Compiler GCC 12.2.0
Executable /home/jan/Documents/dev/trove-setup/.venv/bin/python

Operating System

Name Value
System Linux
Release 6.1.0-17-amd64
Version #1 SMP PREEMPT_DYNAMIC Debian 6.1.69-1 (2023-12-30)

Terminal

Name Value
Terminal Application vscode (1.88.1)
TERM xterm-256color
COLORTERM truecolor
FORCE_COLOR Not set
NO_COLOR Not set

Rich Console options

Name Value
size width=208, height=17
legacy_windows False
min_width 1
max_width 208
is_terminal True
encoding utf-8
max_height 17
justify None
overflow None
no_wrap False
highlight None
markup None
height None

Video:

2024-04-29_19-33-11.mp4
github-actions commented

Thank you for your issue. Give us a little time to review it.

PS. You might want to check the FAQ if you haven't done so already.

This is an automated reply, generated by FAQtory

github-actions commented

Don't forget to star the repository!

Follow @textualizeio for Textual updates.