textual
Textual Knowledge
Provides patterns, API constraints, and working examples for building terminal applications with the Textual framework.
Scope
Consult ../python3-development/references/python3-standards.md when applying shared architecture, typing, testing, or CLI rules; full standards, graphs, and amendment process are documented there.
TRIGGER: Activate when the user asks about Textual — building TUI apps, widgets, CSS styling, reactive attributes, testing, or concurrency.
COVERS:
- App class, run/exit/suspend, title/subtitle, CSS loading
- Screen stack (push, pop, switch), modal screens, modes, screen data return
- Custom widgets, builtins, Line API, compound widgets, data flow
- Layout types (vertical, horizontal, grid), docking, layers, offsets
- CSS selectors, pseudo-classes, combinators, specificity, variables, nesting
- Events, message queue, bubbling, custom messages,
@ondecorator - Actions, action strings, namespaces, bindings, dynamic actions
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