c7fc66fa6c
Until now the Tree.NodeExpanded and Tree.NodeCollapsed messages were only sent out when changes were made to the tree by user interaction. This meant that if any changes were made with the TreeNode expand, expand_all, collapse, collapse_all, toggle or toggle_all API calls no messages would be sent. This PR corrects this. The work here is, in part, required for #2456 (DirectoryTree lazy-loads directory information on node expansion so if someone is expanding nodes under code control the DirectoryTree never gets to know that it should load a directory's content) and will build on #1644, essentially adding a missing aspect to the latter PR.
Textual
Textual is a Rapid Application Development framework for Python.
Build sophisticated user interfaces with a simple Python API. Run your apps in the terminal and (coming soon) a web browser!
🎬 Demonstration
A quick run through of some Textual features.
https://user-images.githubusercontent.com/554369/197355913-65d3c125-493d-4c05-a590-5311f16c40ff.mov
About
Textual adds interactivity to Rich with an API inspired by modern web development.
On modern terminal software (installed by default on most systems), Textual apps can use 16.7 million colors with mouse support and smooth flicker-free animation. A powerful layout engine and re-usable components makes it possible to build apps that rival the desktop and web experience.
Compatibility
Textual runs on Linux, macOS, and Windows. Textual requires Python 3.7 or above.
Installing
Install Textual via pip:
pip install "textual[dev]"
The addition of [dev] installs Textual development tools. See the docs if you need help getting started.
Demo
Run the following command to see a little of what Textual can do:
python -m textual
Documentation
Head over to the Textual documentation to start building!
Join us on Discord
Join the Textual developers and community on our Discord Server.
Examples
The Textual repository comes with a number of examples you can experiment with or use as a template for your own projects.
🎬 Code browser
This is the code_browser.py example which clocks in at 61 lines (including docstrings and blank lines).
https://user-images.githubusercontent.com/554369/197188237-88d3f7e4-4e5f-40b5-b996-c47b19ee2f49.mov
🎬 Stopwatch
This is the Stopwatch example from the tutorial.
https://user-images.githubusercontent.com/554369/197360718-0c834ef5-6285-4d37-85cf-23eed4aa56c5.mov
Reference commands
The textual command has a few sub-commands to preview Textual styles.
🎬 Easing reference
This is the easing reference which demonstrates the easing parameter on animation, with both movement and opacity. You can run it with the following command:
textual easing
https://user-images.githubusercontent.com/554369/196157100-352852a6-2b09-4dc8-a888-55b53570aff9.mov
🎬 Borders reference
This is the borders reference which demonstrates some of the borders styles in Textual. You can run it with the following command:
textual borders
https://user-images.githubusercontent.com/554369/196158235-4b45fb78-053d-4fd5-b285-e09b4f1c67a8.mov
🎬 Colors reference
This is a reference for Textual's color design system.
textual colors
https://user-images.githubusercontent.com/554369/197357417-2d407aac-8969-44d3-8250-eea45df79d57.mov