Add files using upload-large-folder tool

testbed/Textualize__textual/.coveragerc

@@ -0,0 +1,9 @@
+[run]
+omit =
+
+[report]
+exclude_lines =
+    pragma: no cover
+    if TYPE_CHECKING:
+    if __name__ == "__main__":
+    @overload

testbed/Textualize__textual/.gitignore

@@ -0,0 +1,118 @@
+*.ipynb
+.pytype
+.DS_Store
+.vscode
+.idea
+mypy_report
+docs/build
+docs/source/_build
+tools/*.txt
+playground/
+
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+.hypothesis/
+.pytest_cache/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# pyenv
+.python-version
+
+# celery beat schedule file
+celerybeat-schedule
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+
+# Snapshot testing report output directory
+tests/snapshot_tests/output

testbed/Textualize__textual/.pre-commit-config.yaml

@@ -0,0 +1,16 @@
+# See https://pre-commit.com for more information
+# See https://pre-commit.com/hooks.html for more hooks
+repos:
+-   repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.3.0
+    hooks:
+    -   id: trailing-whitespace
+    -   id: end-of-file-fixer
+    -   id: check-yaml
+        args: ['--unsafe']
+-   repo: https://github.com/psf/black
+    rev: 22.3.0
+    hooks:
+    -   id: black
+        exclude: ^tests/
+exclude: ^tests/snapshot_tests

testbed/Textualize__textual/CHANGELOG.md

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+# Change Log
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/)
+and this project adheres to [Semantic Versioning](http://semver.org/).
+
+## [0.2.0] - Unreleased
+
+### Added
+
+- CSS support
+- Too numerous to mention
+
+## [0.1.15] - 2022-01-31
+
+### Added
+
+- Added Windows Driver
+
+## [0.1.14] - 2022-01-09
+
+### Changed
+
+- Updated Rich dependency to 11.X
+
+## [0.1.13] - 2022-01-01
+
+### Fixed
+
+- Fixed spurious characters when exiting app
+- Fixed increasing delay when exiting
+
+## [0.1.12] - 2021-09-20
+
+### Added
+
+- Added geometry.Spacing
+
+### Fixed
+
+- Fixed calculation of virtual size in scroll views
+
+## [0.1.11] - 2021-09-12
+
+### Changed
+
+- Changed message handlers to use prefix handle\_
+- Renamed messages to drop the Message suffix
+- Events now bubble by default
+- Refactor of layout
+
+### Added
+
+- Added App.measure
+- Added auto_width to Vertical Layout, WindowView, an ScrollView
+- Added big_table.py example
+- Added easing.py example
+
+## [0.1.10] - 2021-08-25
+
+### Added
+
+- Added keyboard control of tree control
+- Added Widget.gutter to calculate space between renderable and outside edge
+- Added margin, padding, and border attributes to Widget
+
+### Changed
+
+- Callbacks may be async or non-async.
+- Event handler event argument is optional.
+- Fixed exception in clock example https://github.com/willmcgugan/textual/issues/52
+- Added Message.wait() which waits for a message to be processed
+- Key events are now sent to widgets first, before processing bindings
+
+## [0.1.9] - 2021-08-06
+
+### Added
+
+- Added hover over and mouse click to activate keys in footer
+- Added verbosity argument to Widget.log
+
+### Changed
+
+- Simplified events. Remove Startup event (use Mount)
+- Changed geometry.Point to geometry.Offset and geometry.Dimensions to geometry.Size
+
+## [0.1.8] - 2021-07-17
+
+### Fixed
+
+- Fixed exiting mouse mode
+- Fixed slow animation
+
+### Added
+
+- New log system
+
+## [0.1.7] - 2021-07-14
+
+### Changed
+
+- Added functionality to calculator example.
+- Scrollview now shows scrollbars automatically
+- New handler system for messages that doesn't require inheritance
+- Improved traceback handling

testbed/Textualize__textual/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2021 Will McGugan
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

testbed/Textualize__textual/Makefile

@@ -0,0 +1,18 @@
+test:
+	pytest --cov-report term-missing --cov=textual tests/ -vv
+unit-test:
+	pytest --cov-report term-missing --cov=textual tests/ -vv -m "not integration_test"
+test-snapshot-update:
+	pytest --cov-report term-missing --cov=textual tests/ -vv --snapshot-update
+typecheck:
+	mypy src/textual
+format:
+	black src
+format-check:
+	black --check src
+docs-serve:
+	mkdocs serve
+docs-build:
+	mkdocs build
+docs-deploy:
+	mkdocs gh-deploy

testbed/Textualize__textual/README.md

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+# Textual
+
+![Textual splash image](./imgs/textual.png)
+
+Textual is a Python framework for creating interactive applications that run in your terminal.
+
+<details>
+  <summary> 🎬 Code browser </summary>
+  <hr>
+
+  This is the [code_browser.py](./examples/code_browser.py) example which clocks in at 61 lines (*including* docstrings and blank lines).
+
+  https://user-images.githubusercontent.com/554369/189394703-364b5caa-97e0-45db-907d-7b1620d6411f.mov
+  
+ </details>
+
+
+## About
+
+Textual adds interactivity to [Rich](https://github.com/Textualize/rich) with a Python API inspired by modern development 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.
+
+
+## Reference commands
+
+The `textual` command has a few sub-commands to preview Textual styles.
+
+<details>  
+  <summary> 🎬 Easing reference </summary>
+  <hr>
+  
+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:
+  
+```bash
+textual easing
+```
+
+https://user-images.githubusercontent.com/554369/189485538-31e794ff-61d7-4faf-902a-6e90a9d76e5b.mov
+
+ </details>
+
+<details>  
+  <summary> 🎬 Borders reference </summary>
+  <hr>
+  
+This is the borders reference which demonstrates some of the borders styles in Textual. You can run it with the following command:
+  
+```bash
+textual borders
+```
+  
+
+https://user-images.githubusercontent.com/554369/189485735-cb2b4135-caee-46d7-a118-66cd7ed9eef5.mov
+
+
+  
+</details>
+
+## Examples
+
+The Textual repository comes with a number of examples you can experiment with or use as a template for your own projects.
+
+<details>  
+  <summary> 📷 Calculator </summary>
+  <hr>
+  
+This is [calculator.py](./examples/calculator.py) which demonstrates Textual grid layouts.
+  
+![calculator screenshot](./imgs/calculator.svg)
+</details>
+
+<details>
+  <summary> 📷 Code browser </summary>
+  <hr>
+
+  This is [code_browser.py](./examples/code_browser.py) which demonstrates the directory tree widget.
+  
+![code browser screenshot](./imgs/codebrowser.svg)
+  
+</details>
+
+
+<details>
+  <summary> 📷 Stopwatch </summary>
+  <hr>
+
+  This is the Stopwatch example from the tutorial.
+  
+### Light theme 
+  
+![stopwatch light screenshot](./imgs/stopwatch_light.svg)
+
+### Dark theme
+  
+![stopwatch dark screenshot](./imgs/stopwatch_dark.svg)
+
+</details>

testbed/Textualize__textual/custom_theme/main.html

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+{% extends "base.html" %}
+
+{% block extrahead %}
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/firacode/6.2.0/fira_code.min.css" integrity="sha512-MbysAYimH1hH2xYzkkMHB6MqxBqfP0megxsCLknbYqHVwXTCg9IqHbk+ZP/vnhO8UEW6PaXAkKe2vQ+SWACxxA==" crossorigin="anonymous" referrerpolicy="no-referrer" />
+{% endblock %}

testbed/Textualize__textual/docs.md

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+# Documentation Workflow
+
+* Ensure you're inside a *Python 3.10+* virtual environment
+* Run the live-reload server using `mkdocs serve` from the project root
+* Create new pages by adding new directories and Markdown files inside `docs/*`
+
+## Commands
+
+- `mkdocs serve` - Start the live-reloading docs server.
+- `mkdocs build` - Build the documentation site.
+- `mkdocs -h` - Print help message and exit.
+
+## Project layout
+
+    mkdocs.yml    # The configuration file.
+    docs/
+        index.md  # The documentation homepage.
+        ...       # Other markdown pages, images and other files.

testbed/Textualize__textual/docs/CNAME

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+textual.textualize.io

testbed/Textualize__textual/e2e_tests/sandbox_basic_test.py

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+from __future__ import annotations
+
+import shlex
+import sys
+import subprocess
+import threading
+from pathlib import Path
+
+target_script_name = "basic"
+script_time_to_live = 2.0  # in seconds
+
+if len(sys.argv) > 1:
+    target_script_name = sys.argv[1]
+if len(sys.argv) > 2:
+    script_time_to_live = float(sys.argv[2])
+
+e2e_root = Path(__file__).parent / "test_apps"
+
+completed_process = None
+
+
+def launch_sandbox_script(python_file_name: str) -> None:
+    global completed_process
+
+    command = f"{sys.executable} {shlex.quote(python_file_name)}.py"
+    print(f"Launching command '{command}'...")
+    try:
+        completed_process = subprocess.run(
+            command, shell=True, check=True, capture_output=True, cwd=str(e2e_root)
+        )
+    except subprocess.CalledProcessError as err:
+        print(f"Process error: {err.stderr}")
+        raise
+
+
+thread = threading.Thread(
+    target=launch_sandbox_script, args=(target_script_name,), daemon=False
+)
+thread.start()
+
+print(
+    f"Launching Python script in a sub-thread; we'll wait for it for {script_time_to_live} seconds..."
+)
+thread.join(timeout=script_time_to_live)
+print("The wait is over.")
+
+process_still_running = completed_process is None
+process_was_able_to_run_without_errors = process_still_running
+
+if process_was_able_to_run_without_errors:
+    print("Python script is still running :-)")
+else:
+    print("Python script is no longer running :-/")
+
+sys.exit(0 if process_was_able_to_run_without_errors else 1)

testbed/Textualize__textual/e2e_tests/test_apps/basic.css

@@ -0,0 +1,250 @@
+/* CSS file for basic.py */
+
+
+
+ * {
+    transition: color 300ms linear, background 300ms linear;
+}
+
+
+*:hover {
+  /* tint: 30% red;
+  /* outline: heavy red; */
+}
+
+App > Screen {
+
+  background: $background;
+  color: $text;
+  layers: base sidebar;  
+  layout: vertical;
+  overflow: hidden;
+}
+
+#tree-container {
+  overflow-y: auto;
+  height: 20;
+  margin: 1 2;
+  background: $surface;
+  padding: 1 2;
+}
+
+DirectoryTree {
+    padding: 0 1;
+    height: auto;
+
+}
+
+
+
+
+DataTable {
+  /*border:heavy red;*/
+  /* tint: 10% green; */
+  /* text-opacity: 50%; */
+  padding: 1;
+  margin: 1 2;
+  height: 24;
+}
+
+#sidebar {  
+  background: $panel;
+  color: $text;
+  dock: left;
+  width: 30;
+  margin-bottom: 1;
+  offset-x: -100%;
+
+  transition: offset 500ms in_out_cubic;
+  layer: sidebar;
+}
+
+#sidebar.-active {
+  offset-x: 0;
+}
+
+#sidebar .title {
+  height: 1;
+  background: $primary-background-darken-1;
+  color: $text;
+  border-right: wide $background;
+  content-align: center middle;
+}
+
+#sidebar .user {
+  height: 8;
+  background: $panel-darken-1;
+  color: $text;
+  border-right: wide $background;
+  content-align: center middle;
+}
+
+#sidebar .content {
+  background: $panel-darken-2;
+  color: $text;
+  border-right: wide $background;
+  content-align: center middle;
+}
+
+
+
+
+Tweet {
+  height:12;
+  width: 100%;
+  margin: 0 2;
+
+  margin:0 2;
+  background: $panel;
+  color: $text;
+  layout: vertical;
+  /* border: outer $primary; */
+  padding: 1;
+  border: wide $panel;
+  overflow: auto;
+  /* scrollbar-gutter: stable; */
+  align-horizontal: center;
+  box-sizing: border-box;
+
+}
+
+
+.scrollable {
+  overflow-x: auto;
+  overflow-y: scroll;
+  margin: 1 2;
+  height: 24;
+  align-horizontal: center;
+  layout: vertical;
+}
+
+.code {
+  height: auto;
+
+}
+
+
+TweetHeader {
+  height:1;
+  background: $accent;
+  color: $text;
+}
+
+TweetBody {
+  width: 100%;
+  background: $panel;
+  color: $text;
+  height: auto;
+  padding: 0 1 0 0;
+}
+
+Tweet.scroll-horizontal TweetBody {
+  width: 350;
+}
+
+.button {
+  background: $accent;
+  color: $text;
+  width:20;
+  height: 3;
+  /* border-top: hidden  $accent-darken-3;  */
+  border: tall $accent-darken-2;
+  /* border-left: tall $accent-darken-1; */
+
+
+  /* padding: 1 0 0 0 ; */
+
+  transition: background 400ms in_out_cubic, color 400ms in_out_cubic;
+
+}
+
+.button:hover {
+  background: $accent-lighten-1;
+  color: $text;
+  width: 20;
+  height: 3;
+  border: tall $accent-darken-1;
+  /* border-left: tall $accent-darken-3; */
+
+
+
+
+}
+
+#footer {
+  color: $text;
+  background: $accent;
+  height: 1;
+
+  content-align: center middle;
+  dock:bottom;
+}
+
+
+#sidebar .content {
+  layout: vertical
+}
+
+OptionItem {
+  height: 3;
+  background: $panel;
+  border-right: wide $background;
+  border-left: blank;
+  content-align: center middle;
+}
+
+OptionItem:hover {
+  height: 3;
+  color: $text;
+  background: $primary-darken-1;
+  /* border-top: hkey $accent2-darken-3;
+  border-bottom: hkey $accent2-darken-3; */
+  text-style: bold;
+  border-left: outer $secondary-darken-2;
+}
+
+Error {
+  width: 100%;
+  height:3;
+  background: $error;
+  color: $text;
+  border-top: tall $error-darken-2;
+  border-bottom: tall $error-darken-2;
+
+  padding: 0;
+  text-style: bold;
+  align-horizontal: center;
+}
+
+Warning {
+  width: 100%;
+  height:3;
+  background: $warning;
+  color: $text;
+  border-top: tall $warning-darken-2;
+  border-bottom: tall $warning-darken-2;
+
+  text-style: bold;
+  align-horizontal: center;
+}
+
+Success {
+  width: 100%;
+
+  height:auto;
+  box-sizing: border-box;
+  background: $success;
+  color: $text;
+
+  border-top: hkey $success-darken-2;
+  border-bottom: hkey $success-darken-2;
+
+  text-style: bold ;
+
+  align-horizontal: center;
+}
+
+
+.horizontal {
+  layout: horizontal
+}

testbed/Textualize__textual/e2e_tests/test_apps/basic.py

@@ -0,0 +1,236 @@
+from rich.console import RenderableType
+
+from rich.syntax import Syntax
+from rich.text import Text
+
+from textual.app import App, ComposeResult
+from textual.reactive import Reactive
+from textual.widget import Widget
+from textual.widgets import Static, DataTable, DirectoryTree, Header, Footer
+from textual.containers import Container
+
+CODE = '''
+from __future__ import annotations
+
+from typing import Iterable, TypeVar
+
+T = TypeVar("T")
+
+
+def loop_first(values: Iterable[T]) -> Iterable[tuple[bool, T]]:
+    """Iterate and generate a tuple with a flag for first value."""
+    iter_values = iter(values)
+    try:
+        value = next(iter_values)
+    except StopIteration:
+        return
+    yield True, value
+    for value in iter_values:
+        yield False, value
+
+
+def loop_last(values: Iterable[T]) -> Iterable[tuple[bool, T]]:
+    """Iterate and generate a tuple with a flag for last value."""
+    iter_values = iter(values)
+    try:
+        previous_value = next(iter_values)
+    except StopIteration:
+        return
+    for value in iter_values:
+        yield False, previous_value
+        previous_value = value
+    yield True, previous_value
+
+
+def loop_first_last(values: Iterable[T]) -> Iterable[tuple[bool, bool, T]]:
+    """Iterate and generate a tuple with a flag for first and last value."""
+    iter_values = iter(values)
+    try:
+        previous_value = next(iter_values)
+    except StopIteration:
+        return
+    first = True
+    for value in iter_values:
+        yield first, False, previous_value
+        first = False
+        previous_value = value
+    yield first, True, previous_value
+'''
+
+
+lorem_short = """Lorem ipsum dolor sit amet, consectetur adipiscing elit. In velit liber a a a, volutpat nec hendrerit at, faucibus in odio. Aliquam hendrerit nibh sed quam volutpat maximus. Nullam suscipit convallis lorem quis sodales. In tristique lobortis ante et dictum. Ut at finibus ipsum."""
+lorem = (
+    lorem_short
+    + """ In urna dolor, placerat et mi facilisis, congue sollicitudin massa. Phasellus felis turpis, cursus eu lectus et, porttitor malesuada augue. Sed feugiat volutpat velit, sollicitudin fringilla velit bibendum faucibus. Lorem ipsum dolor sit amet, consectetur adipiscing elit. In velit libero, volutpat nec hendrerit at, faucibus in odio. Aliquam hendrerit nibh sed quam volutpat maximus. Nullam suscipit convallis lorem quis sodales. In tristique lobortis ante et dictum. Ut at finibus ipsum. In urna dolor, placerat et mi facilisis, congue sollicitudin massa. Phasellus felis turpis, cursus eu lectus et, porttitor malesuada augue. Sed feugiat volutpat velit, sollicitudin fringilla velit bibendum faucibus. """
+)
+
+lorem_short_text = Text.from_markup(lorem_short)
+lorem_long_text = Text.from_markup(lorem * 2)
+
+
+class TweetHeader(Widget):
+    def render(self) -> RenderableType:
+        return Text("Lorem Impsum", justify="center")
+
+
+class TweetBody(Widget):
+    short_lorem = Reactive(False)
+
+    def render(self) -> Text:
+        return lorem_short_text if self.short_lorem else lorem_long_text
+
+
+class Tweet(Widget):
+    pass
+
+
+class OptionItem(Widget):
+    def render(self) -> Text:
+        return Text("Option")
+
+
+class Error(Widget):
+    def render(self) -> Text:
+        return Text("This is an error message", justify="center")
+
+
+class Warning(Widget):
+    def render(self) -> Text:
+        return Text("This is a warning message", justify="center")
+
+
+class Success(Widget):
+    def render(self) -> Text:
+        return Text("This is a success  message", justify="center")
+
+
+class BasicApp(App):
+    """A basic app demonstrating CSS"""
+
+    CSS_PATH = "basic.css"
+
+    def on_load(self):
+        """Bind keys here."""
+        self.bind("s", "toggle_class('#sidebar', '-active')", description="Sidebar")
+        self.bind("d", "toggle_dark", description="Dark mode")
+        self.bind("q", "quit", description="Quit")
+        self.bind("f", "query_test", description="Query test")
+
+    def compose(self):
+        yield Header()
+
+        table = DataTable()
+        self.scroll_to_target = Tweet(TweetBody())
+
+        yield Container(
+            Tweet(TweetBody()),
+            Widget(
+                Static(
+                    Syntax(CODE, "python", line_numbers=True, indent_guides=True),
+                    classes="code",
+                ),
+                classes="scrollable",
+            ),
+            table,
+            Widget(DirectoryTree("~/"), id="tree-container"),
+            Error(),
+            Tweet(TweetBody(), classes="scrollbar-size-custom"),
+            Warning(),
+            Tweet(TweetBody(), classes="scroll-horizontal"),
+            Success(),
+            Tweet(TweetBody(), classes="scroll-horizontal"),
+            Tweet(TweetBody(), classes="scroll-horizontal"),
+            Tweet(TweetBody(), classes="scroll-horizontal"),
+            Tweet(TweetBody(), classes="scroll-horizontal"),
+            Tweet(TweetBody(), classes="scroll-horizontal"),
+        )
+        yield Widget(
+            Widget(classes="title"),
+            Widget(classes="user"),
+            OptionItem(),
+            OptionItem(),
+            OptionItem(),
+            Widget(classes="content"),
+            id="sidebar",
+        )
+        yield Footer()
+
+        table.add_column("Foo", width=20)
+        table.add_column("Bar", width=20)
+        table.add_column("Baz", width=20)
+        table.add_column("Foo", width=20)
+        table.add_column("Bar", width=20)
+        table.add_column("Baz", width=20)
+        table.zebra_stripes = True
+        for n in range(100):
+            table.add_row(*[f"Cell ([b]{n}[/b], {col})" for col in range(6)])
+
+    def on_mount(self):
+        self.sub_title = "Widget demo"
+
+    async def on_key(self, event) -> None:
+        await self.dispatch_key(event)
+
+    def action_toggle_dark(self):
+        self.dark = not self.dark
+
+    def action_query_test(self):
+        query = self.query("Tweet")
+        self.log(query)
+        self.log(query.nodes)
+        self.log(query)
+        self.log(query.nodes)
+
+        query.set_styles("outline: outer red;")
+
+        query = query.exclude(".scroll-horizontal")
+        self.log(query)
+        self.log(query.nodes)
+
+        # query = query.filter(".rubbish")
+        # self.log(query)
+        # self.log(query.first())
+
+    async def key_q(self):
+        await self.shutdown()
+
+    def key_x(self):
+        self.panic(self.tree)
+
+    def key_escape(self):
+        self.app.bell()
+
+    def key_t(self):
+        # Pressing "t" toggles the content of the TweetBody widget, from a long "Lorem ipsum..." to a shorter one.
+        tweet_body = self.query("TweetBody").first()
+        tweet_body.short_lorem = not tweet_body.short_lorem
+
+    def key_v(self):
+        self.get_child(id="content").scroll_to_widget(self.scroll_to_target)
+
+    def key_space(self):
+        self.bell()
+
+
+if __name__ == "__main__":
+    app = BasicApp()
+    app.run(quit_after=2)
+
+    # from textual.geometry import Region
+    # from textual.color import Color
+
+    # print(Region.intersection.cache_info())
+    # print(Region.overlaps.cache_info())
+    # print(Region.union.cache_info())
+    # print(Region.split_vertical.cache_info())
+    # print(Region.__contains__.cache_info())
+    # from textual.css.scalar import Scalar
+
+    # print(Scalar.resolve_dimension.cache_info())
+
+    # from rich.style import Style
+    # from rich.cells import cached_cell_len
+
+    # print(Style._add.cache_info())
+
+    # print(cached_cell_len.cache_info())

testbed/Textualize__textual/examples/README.md

@@ -0,0 +1,10 @@
+# Textual Examples
+
+This directory contains example Textual applications.
+
+To run them, navigate to the examples directory and enter `python` followed buy the name of the Python file.
+
+```
+cd textual/examples
+python pride.py
+```

testbed/Textualize__textual/mkdocs.yml

@@ -0,0 +1,197 @@
+site_name: Textual
+site_url: https://textual.textualize.io/
+repo_url: https://github.com/textualize/textual/
+edit_uri: edit/css/docs/
+
+nav:
+  - Introduction:
+    - "index.md"
+    - "getting_started.md"
+  - "tutorial.md"
+  - Guide:
+    - "guide/index.md"
+    - "guide/devtools.md"
+    - "guide/app.md"
+    - "guide/styles.md"
+    - "guide/CSS.md"
+    - "guide/queries.md"
+    - "guide/layout.md"
+    - "guide/events.md"
+    - "guide/input.md"
+    - "guide/actions.md"
+    - "guide/reactivity.md"
+    - "guide/widgets.md"
+    - "guide/animation.md"
+    - "guide/screens.md"
+  - How to:
+    - "how-to/index.md"
+    - "how-to/animation.md"
+    - "how-to/mouse-and-keyboard.md"
+    - "how-to/scroll.md"
+  - Events:
+    - "events/index.md"
+    - "events/blur.md"
+    - "events/descendant_blur.md"
+    - "events/descendant_focus.md"
+    - "events/enter.md"
+    - "events/focus.md"
+    - "events/hide.md"
+    - "events/key.md"
+    - "events/leave.md"
+    - "events/load.md"
+    - "events/mount.md"
+    - "events/mouse_capture.md"
+    - "events/click.md"
+    - "events/mouse_down.md"
+    - "events/mouse_move.md"
+    - "events/mouse_release.md"
+    - "events/mouse_scroll_down.md"
+    - "events/mouse_scroll_up.md"
+    - "events/mouse_up.md"
+    - "events/paste.md"
+    - "events/resize.md"
+    - "events/screen_resume.md"
+    - "events/screen_suspend.md"
+    - "events/show.md"
+  - Styles:
+    - "styles/index.md"
+    - "styles/align.md"
+    - "styles/background.md"
+    - "styles/border.md"
+    - "styles/box_sizing.md"
+    - "styles/color.md"
+    - "styles/content_align.md"
+    - "styles/display.md"
+    - "styles/dock.md"
+    - "styles/grid.md"
+    - "styles/height.md"
+    - "styles/layer.md"
+    - "styles/layers.md"
+    - "styles/layout.md"
+    - "styles/margin.md"
+    - "styles/max_height.md"
+    - "styles/max_width.md"
+    - "styles/min_height.md"
+    - "styles/min_width.md"
+    - "styles/offset.md"
+    - "styles/opacity.md"
+    - "styles/outline.md"
+    - "styles/overflow.md"
+    - "styles/padding.md"
+    - "styles/scrollbar.md"
+    - "styles/scrollbar_gutter.md"
+    - "styles/scrollbar_size.md"
+    - "styles/text_align.md"
+    - "styles/text_style.md"
+    - "styles/text_opacity.md"
+    - "styles/tint.md"
+    - "styles/visibility.md"
+    - "styles/width.md"
+  - Widgets:
+    - "widgets/button.md"
+    - "widgets/data_table.md"
+    - "widgets/footer.md"
+    - "widgets/header.md"
+    - "widgets/index.md"
+    - "widgets/input.md"
+    - "widgets/static.md"
+    - "widgets/tree_control.md"
+  - Reference:    
+    - "reference/app.md"
+    - "reference/button.md"
+    - "reference/color.md"
+    - "reference/containers.md"
+    - "reference/dom_node.md"
+    - "reference/events.md"
+    - "reference/footer.md"
+    - "reference/geometry.md"
+    - "reference/header.md"
+    - "reference/index.md"
+    - "reference/message_pump.md"
+    - "reference/message.md"
+    - "reference/query.md"
+    - "reference/reactive.md"
+    - "reference/screen.md"
+    - "reference/static.md"
+    - "reference/timer.md"
+    - "reference/widget.md"
+
+
+markdown_extensions:
+  - attr_list
+  - pymdownx.emoji:
+      emoji_index: !!python/name:materialx.emoji.twemoji
+      emoji_generator: !!python/name:materialx.emoji.to_svg
+  - md_in_html
+  - admonition
+  - def_list
+  - meta
+
+  - toc:
+      permalink: true
+      baselevel: 1
+  - pymdownx.keys
+  - pymdownx.tasklist:
+      custom_checkbox: true
+  - pymdownx.highlight:
+      anchor_linenums: true
+  - pymdownx.inlinehilite
+  - pymdownx.superfences:
+      custom_fences:
+        - name: textual
+          class: textual
+          format: !!python/name:textual._doc.format_svg
+        - name: rich
+          class: rich
+          format: !!python/name:textual._doc.rich
+  - pymdownx.inlinehilite
+  - pymdownx.superfences
+  - pymdownx.snippets
+  - pymdownx.tabbed:
+      alternate_style: true
+  - pymdownx.snippets
+  - markdown.extensions.attr_list
+
+theme:
+  name: material
+  custom_dir: custom_theme
+  features:
+    - navigation.tabs
+    - navigation.indexes
+    - navigation.tabs.sticky
+    - content.code.annotate
+  palette:
+  - media: "(prefers-color-scheme: light)"
+    scheme: default
+    accent: purple
+    toggle:
+      icon: material/weather-sunny
+      name: Switch to dark modeTask was destroyed but it is pending!
+  - media: "(prefers-color-scheme: dark)"
+    scheme: slate
+    primary: black
+    toggle:
+      icon: material/weather-night
+      name: Switch to light mode
+
+plugins:
+
+- search:
+- autorefs:
+- mkdocstrings:
+    default_handler: python
+    handlers:
+        python:
+          options:
+            show_source: false
+            filters:
+              - "!^_"
+              - "^__init__$"
+              - "!^can_replace$"
+
+    watch:
+      - src/textual
+
+
+extra_css:
+  - stylesheets/custom.css

testbed/Textualize__textual/mypy.ini

@@ -0,0 +1,16 @@
+[mypy]
+
+[mypy-pygments.*]
+ignore_missing_imports = True
+
+[mypy-IPython.*]
+ignore_missing_imports = True
+
+[mypy-commonmark.*]
+ignore_missing_imports = True
+
+[mypy-colorama.*]
+ignore_missing_imports = True
+
+[mypy-ipywidgets.*]
+ignore_missing_imports = True

testbed/Textualize__textual/notes/README.md

@@ -0,0 +1,3 @@
+# Developer notes
+
+These are notes made by the developer, and _not_ to be considered documentation.

testbed/Textualize__textual/notes/snapshot_testing.md

@@ -0,0 +1,43 @@
+# Snapshot Testing
+
+
+## What is snapshot testing?
+
+Some tests that run for Textual are snapshot tests.
+When you first run a snapshot test, a screenshot of an app is taken and saved to disk.
+Next time you run it, another screenshot is taken and compared with the original one.
+
+If the screenshots don't match, it means something has changed.
+It's up to you to tell the test system whether that change is expected or not.
+
+This allows us to easily catch regressions in how Textual outputs to the terminal.
+
+Snapshot tests run alongside normal unit tests.
+
+## How do I write a snapshot test?
+
+1. Inject the `snap_compare` fixture into your test.
+2. Pass in the path to the file which contains the Textual app.
+
+```python
+def test_grid_layout_basic_overflow(snap_compare):
+    assert snap_compare("docs/examples/guide/layout/grid_layout2.py")
+```
+
+`snap_compare` can take additional arguments such as `press`, which allows
+you to simulate key presses etc.
+See the signature of `snap_compare` for more info.
+
+## A snapshot test failed, what do I do?
+
+When a snapshot test fails, a report will be created on your machine, and you
+can use this report to visually compare the output from your test with the historical output for that test.
+
+This report will be visible at the bottom of the terminal after the `pytest` session completes,
+or, if running in CI, it will be available as an artifact attached to the GitHub Actions summary.
+
+If you're happy that the new output of the app is correct, you can run `pytest` with the
+`--snapshot-update` flag. This flag will update the snapshots for any test that is executed in the run,
+so to update a snapshot for a single test, run only that test.
+
+With your snapshot on disk updated to match the new output, running the test again should result in a pass.

testbed/Textualize__textual/poetry.lock

@@ -0,0 +1,1249 @@
+[[package]]
+name = "aiohttp"
+version = "3.8.3"
+description = "Async http client/server framework (asyncio)"
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+aiosignal = ">=1.1.2"
+async-timeout = ">=4.0.0a3,<5.0"
+asynctest = {version = "0.13.0", markers = "python_version < \"3.8\""}
+attrs = ">=17.3.0"
+charset-normalizer = ">=2.0,<3.0"
+frozenlist = ">=1.1.1"
+multidict = ">=4.5,<7.0"
+typing-extensions = {version = ">=3.7.4", markers = "python_version < \"3.8\""}
+yarl = ">=1.0,<2.0"
+
+[package.extras]
+speedups = ["aiodns", "brotli", "cchardet"]
+
+[[package]]
+name = "aiosignal"
+version = "1.2.0"
+description = "aiosignal: a list of registered asynchronous callbacks"
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+frozenlist = ">=1.1.0"
+
+[[package]]
+name = "async-timeout"
+version = "4.0.2"
+description = "Timeout context manager for asyncio programs"
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+typing-extensions = {version = ">=3.6.5", markers = "python_version < \"3.8\""}
+
+[[package]]
+name = "asynctest"
+version = "0.13.0"
+description = "Enhance the standard unittest package with features for testing asyncio libraries"
+category = "main"
+optional = false
+python-versions = ">=3.5"
+
+[[package]]
+name = "attrs"
+version = "22.1.0"
+description = "Classes Without Boilerplate"
+category = "main"
+optional = false
+python-versions = ">=3.5"
+
+[package.extras]
+dev = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "mypy (>=0.900,!=0.940)", "pytest-mypy-plugins", "zope.interface", "furo", "sphinx", "sphinx-notfound-page", "pre-commit", "cloudpickle"]
+docs = ["furo", "sphinx", "zope.interface", "sphinx-notfound-page"]
+tests = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "mypy (>=0.900,!=0.940)", "pytest-mypy-plugins", "zope.interface", "cloudpickle"]
+tests_no_zope = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "mypy (>=0.900,!=0.940)", "pytest-mypy-plugins", "cloudpickle"]
+
+[[package]]
+name = "black"
+version = "22.8.0"
+description = "The uncompromising code formatter."
+category = "dev"
+optional = false
+python-versions = ">=3.6.2"
+
+[package.dependencies]
+click = ">=8.0.0"
+mypy-extensions = ">=0.4.3"
+pathspec = ">=0.9.0"
+platformdirs = ">=2"
+tomli = {version = ">=1.1.0", markers = "python_full_version < \"3.11.0a7\""}
+typed-ast = {version = ">=1.4.2", markers = "python_version < \"3.8\" and implementation_name == \"cpython\""}
+typing-extensions = {version = ">=3.10.0.0", markers = "python_version < \"3.10\""}
+
+[package.extras]
+colorama = ["colorama (>=0.4.3)"]
+d = ["aiohttp (>=3.7.4)"]
+jupyter = ["ipython (>=7.8.0)", "tokenize-rt (>=3.2.0)"]
+uvloop = ["uvloop (>=0.15.2)"]
+
+[[package]]
+name = "cached-property"
+version = "1.5.2"
+description = "A decorator for caching properties in classes."
+category = "dev"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "certifi"
+version = "2022.9.24"
+description = "Python package for providing Mozilla's CA Bundle."
+category = "dev"
+optional = false
+python-versions = ">=3.6"
+
+[[package]]
+name = "cfgv"
+version = "3.3.1"
+description = "Validate configuration and produce human readable error messages."
+category = "dev"
+optional = false
+python-versions = ">=3.6.1"
+
+[[package]]
+name = "charset-normalizer"
+version = "2.1.1"
+description = "The Real First Universal Charset Detector. Open, modern and actively maintained alternative to Chardet."
+category = "main"
+optional = false
+python-versions = ">=3.6.0"
+
+[package.extras]
+unicode_backport = ["unicodedata2"]
+
+[[package]]
+name = "click"
+version = "8.1.2"
+description = "Composable command line interface toolkit"
+category = "main"
+optional = false
+python-versions = ">=3.7"
+
+[package.dependencies]
+colorama = {version = "*", markers = "platform_system == \"Windows\""}
+importlib-metadata = {version = "*", markers = "python_version < \"3.8\""}
+
+[[package]]
+name = "colorama"
+version = "0.4.5"
+description = "Cross-platform colored terminal text."
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
+[[package]]
+name = "colored"
+version = "1.4.3"
+description = "Simple library for color and formatting to terminal"
+category = "dev"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "commonmark"
+version = "0.9.1"
+description = "Python parser for the CommonMark Markdown spec"
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.extras]
+test = ["flake8 (==3.7.8)", "hypothesis (==3.55.3)"]
+
+[[package]]
+name = "coverage"
+version = "6.5.0"
+description = "Code coverage measurement for Python"
+category = "dev"
+optional = false
+python-versions = ">=3.7"
+
+[package.extras]
+toml = ["tomli"]
+
+[[package]]
+name = "distlib"
+version = "0.3.6"
+description = "Distribution utilities"
+category = "dev"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "filelock"
+version = "3.8.0"
+description = "A platform independent file lock."
+category = "dev"
+optional = false
+python-versions = ">=3.7"
+
+[package.extras]
+docs = ["furo (>=2022.6.21)", "sphinx (>=5.1.1)", "sphinx-autodoc-typehints (>=1.19.1)"]
+testing = ["covdefaults (>=2.2)", "coverage (>=6.4.2)", "pytest (>=7.1.2)", "pytest-cov (>=3)", "pytest-timeout (>=2.1)"]
+
+[[package]]
+name = "frozenlist"
+version = "1.3.1"
+description = "A list-like structure which implements collections.abc.MutableSequence"
+category = "main"
+optional = false
+python-versions = ">=3.7"
+
+[[package]]
+name = "ghp-import"
+version = "2.1.0"
+description = "Copy your docs directly to the gh-pages branch."
+category = "dev"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+python-dateutil = ">=2.8.1"
+
+[package.extras]
+dev = ["twine", "markdown", "flake8", "wheel"]
+
+[[package]]
+name = "griffe"
+version = "0.22.2"
+description = "Signatures for entire Python programs. Extract the structure, the frame, the skeleton of your project, to generate API documentation or find breaking changes in your API."
+category = "dev"
+optional = false
+python-versions = ">=3.7"
+
+[package.dependencies]
+cached-property = {version = "*", markers = "python_version < \"3.8\""}
+
+[package.extras]
+async = ["aiofiles (>=0.7,<1.0)"]
+
+[[package]]
+name = "identify"
+version = "2.5.6"
+description = "File identification library for Python"
+category = "dev"
+optional = false
+python-versions = ">=3.7"
+
+[package.extras]
+license = ["ukkonen"]
+
+[[package]]
+name = "idna"
+version = "3.4"
+description = "Internationalized Domain Names in Applications (IDNA)"
+category = "main"
+optional = false
+python-versions = ">=3.5"
+
+[[package]]
+name = "importlib-metadata"
+version = "4.13.0"
+description = "Read metadata from Python packages"
+category = "main"
+optional = false
+python-versions = ">=3.7"
+
+[package.dependencies]
+typing-extensions = {version = ">=3.6.4", markers = "python_version < \"3.8\""}
+zipp = ">=0.5"
+
+[package.extras]
+docs = ["sphinx (>=3.5)", "jaraco.packaging (>=9)", "rst.linker (>=1.9)", "furo", "jaraco.tidelift (>=1.4)"]
+perf = ["ipython"]
+testing = ["pytest (>=6)", "pytest-checkdocs (>=2.4)", "pytest-flake8", "flake8 (<5)", "pytest-cov", "pytest-enabler (>=1.3)", "packaging", "pyfakefs", "flufl.flake8", "pytest-perf (>=0.9.2)", "pytest-black (>=0.3.7)", "pytest-mypy (>=0.9.1)", "importlib-resources (>=1.3)"]
+
+[[package]]
+name = "iniconfig"
+version = "1.1.1"
+description = "iniconfig: brain-dead simple config-ini parsing"
+category = "dev"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "jinja2"
+version = "3.0.3"
+description = "A very fast and expressive template engine."
+category = "dev"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+MarkupSafe = ">=2.0"
+
+[package.extras]
+i18n = ["Babel (>=2.7)"]
+
+[[package]]
+name = "markdown"
+version = "3.3.7"
+description = "Python implementation of Markdown."
+category = "dev"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+importlib-metadata = {version = ">=4.4", markers = "python_version < \"3.10\""}
+
+[package.extras]
+testing = ["coverage", "pyyaml"]
+
+[[package]]
+name = "markupsafe"
+version = "2.1.1"
+description = "Safely add untrusted strings to HTML/XML markup."
+category = "dev"
+optional = false
+python-versions = ">=3.7"
+
+[[package]]
+name = "mergedeep"
+version = "1.3.4"
+description = "A deep merge function for 🐍."
+category = "dev"
+optional = false
+python-versions = ">=3.6"
+
+[[package]]
+name = "mkdocs"
+version = "1.4.0"
+description = "Project documentation with Markdown."
+category = "dev"
+optional = false
+python-versions = ">=3.7"
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testbed/Textualize__textual/pyproject.toml

@@ -0,0 +1,71 @@
+[tool.poetry]
+name = "textual"
+version = "0.2.0b5"
+homepage = "https://github.com/Textualize/textual"
+description = "Modern Text User Interface framework"
+authors = ["Will McGugan <will@textualize.io>"]
+license = "MIT"
+readme = "README.md"
+classifiers = [
+    "Development Status :: 1 - Planning",
+    "Environment :: Console",
+    "Intended Audience :: Developers",
+    "Operating System :: MacOS",
+    "Operating System :: POSIX :: Linux",
+    "Programming Language :: Python :: 3.7",
+    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Typing :: Typed",
+]
+include = [
+    "src/textual/py.typed"   
+]
+
+[tool.poetry.scripts]
+textual = "textual.cli.cli:run"
+
+[tool.poetry.dependencies]
+python = "^3.7"
+rich = "^12.6.0"
+#rich = {path="../rich", develop=true}
+importlib-metadata = "^4.11.3"
+typing-extensions = { version = "^4.0.0", python = "<3.10" }
+
+# Dependencies below are required for devtools only
+aiohttp = { version = "^3.8.1", optional = true }
+click = {version = "8.1.2", optional = true}
+msgpack = { version = "^1.0.3", optional = true }
+nanoid = "^2.0.0"
+
+[tool.poetry.extras]
+dev = ["aiohttp", "click", "msgpack"]
+
+[tool.poetry.dev-dependencies]
+pytest = "^7.1.3"
+black = "^22.3.0"
+mypy = "^0.982"
+pytest-cov = "^2.12.1"
+mkdocs = "^1.3.0"
+mkdocstrings = {extras = ["python"], version = "^0.19.0"}
+mkdocs-material = "^8.2.15"
+pre-commit = "^2.13.0"
+pytest-aiohttp = "^1.0.4"
+time-machine = "^2.6.0"
+Jinja2 = "<3.1.0"
+syrupy = "^3.0.0"
+
+[tool.black]
+includes = "src"
+
+[tool.pytest.ini_options]
+asyncio_mode = "auto"
+testpaths = ["tests"]
+addopts = "--strict-markers"
+markers = [
+    "integration_test: marks tests as slow integration tests (deselect with '-m \"not integration_test\"')",
+]
+
+[build-system]
+requires = ["poetry-core>=1.0.0"]
+build-backend = "poetry.core.masonry.api"

testbed/Textualize__textual/reference/README.md

@@ -0,0 +1 @@
+Contains private docs, mainly for the developers reference

testbed/Textualize__textual/reference/_color_system.md

@@ -0,0 +1,73 @@
+_Note: This is kind of a living document, which might not form part of the user-facing documentation._
+
+# Textual Color System
+
+Textual's color system is a palette of colors for building TUIs, and a set of guidelines for how they should be used. Based loosely on Google's Material color system, the Textual color system ensures that elements in the TUI look aesthetically pleasing while maximizing legibility
+
+## The colors
+
+There are 10 base colors specified in the Textual Color System. Although it is unlikely that all will need to be specified, since some may be derived from others, and some defaults may not need to be changed.
+
+A dark mode is automatically derived from the base colors. See Dark Mode below.
+
+### Shades
+
+Each color has 6 additional shades (3 darker and 3 lighter), giving a total of 7 shades per color. These are calculated automatically from the base colors.
+
+### Primary and Secondary
+
+The _primary_ and _secondary_ colors are used as a background for large areas of the interface, such as headers and sidebars. The secondary color is optional, and if not supplied will be set to be the same as primary. If supplied, the secondary color should be compliment the primary, and together can be considered the _branding colors_ as they have the greatest influence over the look of the TUI.
+
+### Background and Surface
+
+The _surface_ colors is the base color which goes behind text. The _background_ color is typically the negative space where there is no content.
+
+These two colors tend to be very similar, with just enough difference in lightness to tell them apart. They should be chosen for good contrast with the text.
+
+In light mode the default background is #efefef (a bright grey) and the surface is #f5f5f5 (off white). In dark mode the default background is 100% black, and the default surface is #121212 (very dark grey).
+
+Note that, although both background and surface support the full range of shades, it may not be possible to darken or lighten them further. i.e. you can't get any lighter than 100% white or darken than 100% black.
+
+### Panel
+
+The _panel_ color is typically used as a background to emphasize text on the default surface, or as a UI element that is above the regular UI, such as a menu.
+
+The default panel color is derived from the surface color by blending it towards either white or black text (depending on mode).
+
+Unlike background and surface, the panel color is automatically selected so that it can always be lightened or darkened by the full range.
+
+### Accent
+
+The _accent_ color should be a contrasting color use in UI elements that should stand out, such as selections, status bars, and underlines.
+
+### Warning, Error, and Success
+
+The _warning_, _error_, and _success_ colors have semantic meaning. While they could be any color, by convention warning should be amber / orange, error should be red, and success should be green.
+
+### System
+
+The system color is used for system controls such as scrollbars. The default is for the system color to be the same as accent, but it is recommended that a different color is chosen to differentiate app controls from those rendered by the Textual system.
+
+## Text
+
+For every color and shade there is an automatically calculated text color, which is either white or black, chosen to produce the greatest contrast.
+
+The default text color as a slight alpha component, so that it not pure black or pure white, but a slight tint of the background showing through. Additionally, there are two text shades with increasingly greater alpha for reduced intensity text.
+
+## Dark Mode
+
+A dark mode is automatically generated from the theme. The dark variations of the primary and secondary colors are generated by blending with the background color. This ensures that the branding remains intact, while still providing dark backgrounds.
+
+The dark variations of the background and surface color defaults are selected. The other colors remain the same as light mode. The overall effect is that the majority of the interface is dark, with small portions highlighted by color.
+
+## Naming
+
+The color system produces a number of constants which are exposed in the CSS via variables.
+
+The name of the color will return one of the standard set of colors, for example `primary` or `panel`.
+
+For one of the shade variations, you can append `-darken-1`, `-darken-2`, `-darken-3` for increasingly darker colors, and `-lighten-1`, `lighten-2`, `lighten-3` for increasingly light colors.
+
+For the contrasting text color, prefix the name with `text-`, for instance `text-primary` or `text-panel`. Note that if the text is to be on top of a darkened or lightened color, it must also be included in the name. i.e. if the background is `primary-darken-2`, then the corresponding text color should be `text-primary-darken-2`.
+
+The additional two levels of faded text may be requested by appending `-fade-1` or `-fade-2` for decreasing levels of text alpha.

testbed/Textualize__textual/reference/_devtools.md

@@ -0,0 +1,14 @@
+# Devtools
+
+## Installation
+
+Using the Textual Devtools requires installation of the `dev` extra dependency.
+
+https://python-poetry.org/docs/pyproject/#extras
+
+## Running
+
+TODO: Note how we run the devtools themselves and how we run our Textual apps
+such that they can connect. Don't forget Windows instructions :)
+We might also add a link to the documentation from the exception that gets
+raised when the "dev" extra dependencies aren't installed.

testbed/Textualize__textual/sandbox/darren/basic.css

@@ -0,0 +1,252 @@
+/* CSS file for basic.py */
+
+
+
+ * {
+    transition: color 300ms linear, background 300ms linear;
+}
+
+
+*:hover {
+  /* tint: 30% red;
+  /* outline: heavy red; */
+}
+
+App > Screen {
+
+  background: $surface;
+  color: $text;
+  layers: base sidebar;
+
+  color: $text;
+  background: $background;
+  layout: vertical;
+
+  overflow: hidden;
+
+}
+
+#tree-container {
+  overflow-y: auto;
+  height: 20;
+  margin: 1 2;
+  background: $panel;
+  padding: 1 2;
+}
+
+DirectoryTree {
+    padding: 0 1;
+    height: auto;
+
+}
+
+
+
+
+DataTable {
+  /*border:heavy red;*/
+  /* tint: 10% green; */
+  /* opacity: 50%; */
+  padding: 1;
+  margin: 1 2;
+  height: 24;
+}
+
+#sidebar {
+  color: $text;
+  background: $panel;
+  dock: left;
+  width: 30;
+  margin-bottom: 1;
+  offset-x: -100%;
+  transition: offset 500ms in_out_cubic 2s;
+  layer: sidebar;
+}
+
+#sidebar.-active {
+  offset-x: 0;
+}
+
+#sidebar .title {
+  height: 1;
+  background: $primary-background-darken-1;
+  color: $text-muted;
+  border-right: wide $background;
+  content-align: center middle;
+}
+
+#sidebar .user {
+  height: 8;
+  background: $panel-darken-1;
+  color: $text-muted;
+  border-right: wide $background;
+  content-align: center middle;
+}
+
+#sidebar .content {
+  background: $panel-darken-2;
+  color: $text;
+  border-right: wide $background;
+  content-align: center middle;
+}
+
+
+
+
+Tweet {
+  height:12;
+  width: 100%;
+
+
+  background: $panel;
+  color: $text;
+  layout: vertical;
+  /* border: outer $primary; */
+  padding: 1;
+  border: wide $panel;
+  overflow: auto;
+  /* scrollbar-gutter: stable; */
+  align-horizontal: center;
+  box-sizing: border-box;
+}
+
+
+.scrollable {
+  overflow-x: auto;
+  overflow-y: scroll;
+  margin: 1 2;
+  height: 24;
+  align-horizontal: center;
+  layout: vertical;
+}
+
+.code {
+  height: auto;
+
+}
+
+
+TweetHeader {
+  height:1;
+  background: $accent;
+  color: $text
+}
+
+TweetBody {
+  width: 100%;
+  background: $panel;
+  color: $text;
+  height: auto;
+  padding: 0 1 0 0;
+}
+
+Tweet.scroll-horizontal TweetBody {
+  width: 350;
+}
+
+.button {
+  background: $accent;
+  color: $text;
+  width:20;
+  height: 3;
+  /* border-top: hidden  $accent-darken-3;  */
+  border: tall $accent-darken-2;
+  /* border-left: tall $accent-darken-1; */
+
+
+  /* padding: 1 0 0 0 ; */
+
+  transition: background 400ms in_out_cubic, color 400ms in_out_cubic;
+
+}
+
+.button:hover {
+  background: $accent-lighten-1;
+  color: $text-disabled;
+  width: 20;
+  height: 3;
+  border: tall $accent-darken-1;
+  /* border-left: tall $accent-darken-3; */
+
+
+
+
+}
+
+#footer {
+  color: $text;
+  background: $accent;
+  height: 1;
+
+  content-align: center middle;
+  dock:bottom;
+}
+
+
+#sidebar .content {
+  layout: vertical
+}
+
+OptionItem {
+  height: 3;
+  background: $panel;
+  border-right: wide $background;
+  border-left: blank;
+  content-align: center middle;
+}
+
+OptionItem:hover {
+  height: 3;
+  color: $text;
+  background: $primary-darken-1;
+  /* border-top: hkey $accent2-darken-3;
+  border-bottom: hkey $accent2-darken-3; */
+  text-style: bold;
+  border-left: outer $secondary-darken-2;
+}
+
+Error {
+  width: 100%;
+  height:3;
+  background: $error;
+  color: $text;
+  border-top: tall $error-darken-2;
+  border-bottom: tall $error-darken-2;
+
+  padding: 0;
+  text-style: bold;
+  align-horizontal: center;
+}
+
+Warning {
+  width: 100%;
+  height:3;
+  background: $warning;
+  color: $text-muted;
+  border-top: tall $warning-darken-2;
+  border-bottom: tall $warning-darken-2;
+
+  text-style: bold;
+  align-horizontal: center;
+}
+
+Success {
+  width: 100%;
+
+  height:auto;
+  box-sizing: border-box;
+  background: $success;
+  color: $text-muted;
+
+  border-top: hkey $success-darken-2;
+  border-bottom: hkey $success-darken-2;
+
+  text-style: bold ;
+
+  align-horizontal: center;
+}
+
+
+.horizontal {
+  layout: horizontal
+}

testbed/Textualize__textual/sandbox/darren/basic.py

@@ -0,0 +1,235 @@
+from rich.console import RenderableType
+
+from rich.syntax import Syntax
+from rich.text import Text
+
+from textual.app import App, ComposeResult
+from textual.reactive import Reactive
+from textual.widget import Widget
+from textual.widgets import Static, DataTable, DirectoryTree, Header, Footer
+from textual.containers import Container
+
+CODE = '''
+from __future__ import annotations
+
+from typing import Iterable, TypeVar
+
+T = TypeVar("T")
+
+
+def loop_first(values: Iterable[T]) -> Iterable[tuple[bool, T]]:
+    """Iterate and generate a tuple with a flag for first value."""
+    iter_values = iter(values)
+    try:
+        value = next(iter_values)
+    except StopIteration:
+        return
+    yield True, value
+    for value in iter_values:
+        yield False, value
+
+
+def loop_last(values: Iterable[T]) -> Iterable[tuple[bool, T]]:
+    """Iterate and generate a tuple with a flag for last value."""
+    iter_values = iter(values)
+    try:
+        previous_value = next(iter_values)
+    except StopIteration:
+        return
+    for value in iter_values:
+        yield False, previous_value
+        previous_value = value
+    yield True, previous_value
+
+
+def loop_first_last(values: Iterable[T]) -> Iterable[tuple[bool, bool, T]]:
+    """Iterate and generate a tuple with a flag for first and last value."""
+    iter_values = iter(values)
+    try:
+        previous_value = next(iter_values)
+    except StopIteration:
+        return
+    first = True
+    for value in iter_values:
+        yield first, False, previous_value
+        first = False
+        previous_value = value
+    yield first, True, previous_value
+'''
+
+
+lorem_short = """Lorem ipsum dolor sit amet, consectetur adipiscing elit. In velit liber a a a, volutpat nec hendrerit at, faucibus in odio. Aliquam hendrerit nibh sed quam volutpat maximus. Nullam suscipit convallis lorem quis sodales. In tristique lobortis ante et dictum. Ut at finibus ipsum."""
+lorem = (
+    lorem_short
+    + """ In urna dolor, placerat et mi facilisis, congue sollicitudin massa. Phasellus felis turpis, cursus eu lectus et, porttitor malesuada augue. Sed feugiat volutpat velit, sollicitudin fringilla velit bibendum faucibus. Lorem ipsum dolor sit amet, consectetur adipiscing elit. In velit libero, volutpat nec hendrerit at, faucibus in odio. Aliquam hendrerit nibh sed quam volutpat maximus. Nullam suscipit convallis lorem quis sodales. In tristique lobortis ante et dictum. Ut at finibus ipsum. In urna dolor, placerat et mi facilisis, congue sollicitudin massa. Phasellus felis turpis, cursus eu lectus et, porttitor malesuada augue. Sed feugiat volutpat velit, sollicitudin fringilla velit bibendum faucibus. """
+)
+
+lorem_short_text = Text.from_markup(lorem_short)
+lorem_long_text = Text.from_markup(lorem * 2)
+
+
+class TweetHeader(Widget):
+    def render(self) -> RenderableType:
+        return Text("Lorem Impsum", justify="center")
+
+
+class TweetBody(Widget):
+    short_lorem = Reactive(False)
+
+    def render(self) -> Text:
+        return lorem_short_text if self.short_lorem else lorem_long_text
+
+
+class Tweet(Widget):
+    pass
+
+
+class OptionItem(Widget):
+    def render(self) -> Text:
+        return Text("Option")
+
+
+class Error(Widget):
+    def render(self) -> Text:
+        return Text("This is an error message", justify="center")
+
+
+class Warning(Widget):
+    def render(self) -> Text:
+        return Text("This is a warning message", justify="center")
+
+
+class Success(Widget):
+    def render(self) -> Text:
+        return Text("This is a success  message", justify="center")
+
+
+class BasicApp(App, css_path="basic.css"):
+    """A basic app demonstrating CSS"""
+
+    def on_load(self):
+        """Bind keys here."""
+        self.bind("s", "toggle_class('#sidebar', '-active')", description="Sidebar")
+        self.bind("d", "toggle_dark", description="Dark mode")
+        self.bind("q", "quit", description="Quit")
+        self.bind("f", "query_test", description="Query test")
+
+    def compose(self):
+        yield Header()
+
+        table = DataTable()
+        self.scroll_to_target = Tweet(TweetBody())
+
+        yield Container(
+            Tweet(TweetBody()),
+            Widget(
+                Static(
+                    Syntax(CODE, "python", line_numbers=True, indent_guides=True),
+                    classes="code",
+                ),
+                classes="scrollable",
+            ),
+            table,
+            Widget(DirectoryTree("~/code/textual"), id="tree-container"),
+            Error(),
+            Tweet(TweetBody(), classes="scrollbar-size-custom"),
+            Warning(),
+            Tweet(TweetBody(), classes="scroll-horizontal"),
+            Success(),
+            Tweet(TweetBody(), classes="scroll-horizontal"),
+            Tweet(TweetBody(), classes="scroll-horizontal"),
+            Tweet(TweetBody(), classes="scroll-horizontal"),
+            Tweet(TweetBody(), classes="scroll-horizontal"),
+            Tweet(TweetBody(), classes="scroll-horizontal"),
+        )
+        yield Widget(
+            Widget(classes="title"),
+            Widget(classes="user"),
+            OptionItem(),
+            OptionItem(),
+            OptionItem(),
+            Widget(classes="content"),
+            id="sidebar",
+        )
+        yield Footer()
+
+        table.add_column("Foo", width=20)
+        table.add_column("Bar", width=20)
+        table.add_column("Baz", width=20)
+        table.add_column("Foo", width=20)
+        table.add_column("Bar", width=20)
+        table.add_column("Baz", width=20)
+        table.zebra_stripes = True
+        for n in range(100):
+            table.add_row(*[f"Cell ([b]{n}[/b], {col})" for col in range(6)])
+
+    def on_mount(self):
+        self.sub_title = "Widget demo"
+
+    async def on_key(self, event) -> None:
+        await self.dispatch_key(event)
+
+    def action_toggle_dark(self):
+        self.dark = not self.dark
+
+    def action_query_test(self):
+        query = self.query("Tweet")
+        self.log(query)
+        self.log(query.nodes)
+        self.log(query)
+        self.log(query.nodes)
+
+        query.set_styles("outline: outer red;")
+
+        query = query.exclude(".scroll-horizontal")
+        self.log(query)
+        self.log(query.nodes)
+
+        # query = query.filter(".rubbish")
+        # self.log(query)
+        # self.log(query.first())
+
+    async def key_q(self):
+        await self.shutdown()
+
+    def key_x(self):
+        self.panic(self.tree)
+
+    def key_escape(self):
+        self.app.bell()
+
+    def key_t(self):
+        # Pressing "t" toggles the content of the TweetBody widget, from a long "Lorem ipsum..." to a shorter one.
+        tweet_body = self.query("TweetBody").first()
+        tweet_body.short_lorem = not tweet_body.short_lorem
+
+    def key_v(self):
+        self.get_child(id="content").scroll_to_widget(self.scroll_to_target)
+
+    def key_space(self):
+        self.bell()
+
+
+app = BasicApp()
+
+if __name__ == "__main__":
+    app.run()
+
+    # from textual.geometry import Region
+    # from textual.color import Color
+
+    # print(Region.intersection.cache_info())
+    # print(Region.overlaps.cache_info())
+    # print(Region.union.cache_info())
+    # print(Region.split_vertical.cache_info())
+    # print(Region.__contains__.cache_info())
+    # from textual.css.scalar import Scalar
+
+    # print(Scalar.resolve_dimension.cache_info())
+
+    # from rich.style import Style
+    # from rich.cells import cached_cell_len
+
+    # print(Style._add.cache_info())
+
+    # print(cached_cell_len.cache_info())

testbed/Textualize__textual/sandbox/darren/buttons.css

@@ -0,0 +1,6 @@
+Button {
+    padding-left: 1;
+    padding-right: 1;
+    margin: 3;
+    text-opacity: 30%;
+}

testbed/Textualize__textual/sandbox/darren/buttons.py

@@ -0,0 +1,34 @@
+from textual import events
+from textual.app import App, ComposeResult
+from textual.containers import Vertical
+from textual.widgets import Button
+
+
+class ButtonsApp(App[str]):
+    def compose(self) -> ComposeResult:
+        yield Vertical(
+            Button("default", id="foo"),
+            Button.success("success", id="bar"),
+            Button.warning("warning", id="baz"),
+            Button.error("error", id="baz"),
+        )
+
+    def on_button_pressed(self, event: Button.Pressed) -> None:
+        self.app.bell()
+
+    async def on_key(self, event: events.Key) -> None:
+        await self.dispatch_key(event)
+
+    def key_d(self):
+        self.dark = not self.dark
+
+
+app = ButtonsApp(
+    log_path="textual.log",
+    css_path="buttons.css",
+    watch_css=True,
+)
+
+if __name__ == "__main__":
+    result = app.run()
+    print(repr(result))

testbed/Textualize__textual/sandbox/darren/file_search.py

@@ -0,0 +1,68 @@
+from __future__ import annotations
+
+from pathlib import Path
+from typing import Iterable
+
+from rich.console import RenderableType
+from rich.table import Table
+from rich.text import Text
+
+from textual.app import App
+from textual.geometry import Size
+from textual.reactive import Reactive
+from textual.widget import Widget
+from textual.widgets._input import Input
+
+
+def get_files() -> list[Path]:
+    files = list(Path.cwd().iterdir())
+    return files
+
+
+class FileTable(Widget):
+    filter = Reactive("", layout=True)
+
+    def __init__(self, *args, files: Iterable[Path] | None = None, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.files = files if files is not None else []
+
+    @property
+    def filtered_files(self) -> list[Path]:
+        return [
+            file
+            for file in self.files
+            if self.filter == "" or (self.filter and self.filter in file.name)
+        ]
+
+    def get_content_height(self, container: Size, viewport: Size, width: int) -> int:
+        return len(self.filtered_files)
+
+    def render(self) -> RenderableType:
+        grid = Table.grid()
+        grid.add_column()
+        for file in self.filtered_files:
+            file_text = Text(f" {file.name}")
+            if self.filter:
+                file_text.highlight_regex(self.filter, "black on yellow")
+            grid.add_row(file_text)
+        return grid
+
+
+class FileSearchApp(App):
+    dark = True
+
+    def on_mount(self) -> None:
+        self.file_table = FileTable(id="file_table", files=list(Path.cwd().iterdir()))
+        self.search_bar = Input(placeholder="Search for files...")
+        # self.search_bar.focus()
+        self.mount(search_bar=self.search_bar)
+        self.mount(file_table_wrapper=Widget(self.file_table))
+
+    def on_input_changed(self, event: Input.Changed) -> None:
+        self.file_table.filter = event.value
+
+
+app = FileSearchApp(css_path="file_search.scss", watch_css=True)
+
+if __name__ == "__main__":
+    result = app.run()

testbed/Textualize__textual/sandbox/darren/file_search.scss

@@ -0,0 +1,15 @@
+Screen {
+
+}
+
+#file_table_wrapper {
+  scrollbar-color: $accent-darken-1;
+}
+
+#file_table {
+  height: auto;
+}
+
+#search_bar {
+  height: 1;
+}

testbed/Textualize__textual/sandbox/darren/just_a_box.css

@@ -0,0 +1,12 @@
+Screen {
+    align: center middle;
+    background: darkslategrey;
+    overflow: auto auto;
+}
+
+#box1 {
+    background: darkmagenta;
+    width: auto;
+    opacity: 0.5;
+    padding: 4 8;
+}

testbed/Textualize__textual/sandbox/darren/just_a_box.py

@@ -0,0 +1,35 @@
+from __future__ import annotations
+
+from textual.app import App, ComposeResult
+from textual.binding import Binding
+from textual.widgets import Static, Footer, Header
+
+
+class JustABox(App):
+    BINDINGS = [
+        Binding(key="t", action="text_fade_out", description="text-opacity fade out"),
+        Binding(key="o,f,w", action="widget_fade_out", description="opacity fade out"),
+    ]
+
+    def compose(self) -> ComposeResult:
+        yield Header()
+        yield Static("Hello, world!", id="box1")
+        yield Footer()
+
+    def action_text_fade_out(self) -> None:
+        box = self.query_one("#box1")
+        self.animator.animate(box.styles, "text_opacity", value=0.0, duration=1)
+
+    def action_widget_fade_out(self) -> None:
+        box = self.query_one("#box1")
+        self.animator.animate(box.styles, "opacity", value=0.0, duration=1)
+
+    def key_d(self):
+        print(self.screen.styles.get_rules())
+        print(self.screen.styles.css)
+
+
+app = JustABox(watch_css=True, css_path="../darren/just_a_box.css")
+
+if __name__ == "__main__":
+    app.run()

testbed/Textualize__textual/sandbox/darren/tabs.py

@@ -0,0 +1,147 @@
+from dataclasses import dataclass
+
+from rich.console import RenderableType
+from rich.padding import Padding
+from rich.rule import Rule
+from rich.style import Style
+
+from textual import events
+from textual.app import App
+from textual.widget import Widget
+from textual.widgets.tabs import Tabs, Tab
+
+
+class Hr(Widget):
+    def render(self) -> RenderableType:
+        return Rule()
+
+
+class Info(Widget):
+    def __init__(self, text: str) -> None:
+        super().__init__()
+        self.text = text
+
+    def render(self) -> RenderableType:
+        return Padding(f"{self.text}", pad=(0, 1))
+
+
+@dataclass
+class WidgetDescription:
+    description: str
+    widget: Widget
+
+
+class BasicApp(App):
+    """Sandbox application used for testing/development by Textual developers"""
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.keys_to_tabs = {
+            "1": Tab("January", name="one"),
+            "2": Tab("に月", name="two"),
+            "3": Tab("March", name="three"),
+            "4": Tab("April", name="four"),
+            "5": Tab("May", name="five"),
+            "6": Tab("And a really long tab!", name="six"),
+        }
+        tabs = list(self.keys_to_tabs.values())
+        self.examples = [
+            WidgetDescription(
+                "Customise the spacing between tabs, e.g. tab_padding=1",
+                Tabs(
+                    tabs,
+                    tab_padding=1,
+                ),
+            ),
+            WidgetDescription(
+                "Change the opacity of inactive tab text, e.g. inactive_text_opacity=.2",
+                Tabs(
+                    tabs,
+                    active_tab="two",
+                    active_bar_style="#1493FF",
+                    inactive_text_opacity=0.2,
+                    tab_padding=2,
+                ),
+            ),
+            WidgetDescription(
+                "Change the color of the inactive portions of the underline, e.g. inactive_bar_style='blue'",
+                Tabs(
+                    tabs,
+                    active_tab="four",
+                    inactive_bar_style="blue",
+                ),
+            ),
+            WidgetDescription(
+                "Change the color of the active portion of the underline, e.g. active_bar_style='red'",
+                Tabs(
+                    tabs,
+                    active_tab="five",
+                    active_bar_style="red",
+                    inactive_text_opacity=1,
+                ),
+            ),
+            WidgetDescription(
+                "Change the styling of active and inactive labels (active_tab_style, inactive_tab_style)",
+                Tabs(
+                    tabs,
+                    active_tab="one",
+                    active_bar_style="#DA812D",
+                    active_tab_style="bold #FFCB4D on #021720",
+                    inactive_tab_style="italic #887AEF on #021720",
+                    inactive_bar_style="#695CC8",
+                    inactive_text_opacity=0.6,
+                ),
+            ),
+            WidgetDescription(
+                "Change the animation duration and function (animation_duration=1, animation_function='out_quad')",
+                Tabs(
+                    tabs,
+                    active_tab="one",
+                    active_bar_style="#887AEF",
+                    inactive_text_opacity=0.2,
+                    animation_duration=1,
+                    animation_function="out_quad",
+                ),
+            ),
+            WidgetDescription(
+                "Choose which tab to start on by name, e.g. active_tab='three'",
+                Tabs(
+                    tabs,
+                    active_tab="three",
+                    active_bar_style="#FFCB4D",
+                    tab_padding=3,
+                ),
+            ),
+        ]
+
+    def on_load(self):
+        """Bind keys here."""
+        self.bind("tab", "toggle_class('#sidebar', '-active')")
+        self.bind("a", "toggle_class('#header', '-visible')")
+        self.bind("c", "toggle_class('#content', '-content-visible')")
+        self.bind("d", "toggle_class('#footer', 'dim')")
+
+    def on_key(self, event: events.Key) -> None:
+        for example in self.examples:
+            tab = self.keys_to_tabs.get(event.key)
+            if tab:
+                example.widget._active_tab_name = tab.name
+
+    def on_mount(self):
+        """Build layout here."""
+        self.mount(
+            info=Info(
+                "\n"
+                "• The examples below show customisation options for the [bold #1493FF]Tabs[/] widget.\n"
+                "• Press keys 1-6 on your keyboard to switch tabs, or click on a tab.",
+            )
+        )
+        for example in self.examples:
+            info = Info(example.description)
+            self.mount(Hr())
+            self.mount(info)
+            self.mount(example.widget)
+
+
+app = BasicApp(css_path="tabs.scss", watch_css=True, log_path="textual.log")
+app.run()

testbed/Textualize__textual/sandbox/darren/tabs.scss

@@ -0,0 +1,9 @@
+$background: #021720;
+
+App > View {
+  background: $background;
+}
+
+#info {
+  height: 4;
+}

testbed/Textualize__textual/sandbox/darren/text_align.py

@@ -0,0 +1,33 @@
+from __future__ import annotations
+
+from textual.app import App, ComposeResult
+from textual.widgets import Static
+
+TEXT = (
+    "I must not fear. Fear is the mind-killer. Fear is the little-death that "
+    "brings total obliteration. I will face my fear. I will permit it to pass over "
+    "me and through me. And when it has gone past, I will turn the inner eye to "
+    "see its path. Where the fear has gone there will be nothing. Only I will "
+    "remain. "
+)
+
+
+class TextAlign(App):
+    def compose(self) -> ComposeResult:
+        left = Static("[b]Left aligned[/]\n" + TEXT, id="one")
+        yield left
+
+        right = Static("[b]Center aligned[/]\n" + TEXT, id="two")
+        yield right
+
+        center = Static("[b]Right aligned[/]\n" + TEXT, id="three")
+        yield center
+
+        full = Static("[b]Fully justified[/]\n" + TEXT, id="four")
+        yield full
+
+
+app = TextAlign(css_path="text_align.scss", watch_css=True)
+
+if __name__ == "__main__":
+    app.run()

testbed/Textualize__textual/sandbox/darren/text_align.scss

@@ -0,0 +1,24 @@
+#one {
+  text-align: left;
+  background: lightblue;
+
+}
+
+#two {
+  text-align: center;
+  background: indianred;
+}
+
+#three {
+  text-align: right;
+  background: palegreen;
+}
+
+#four {
+  text-align: justify;
+  background: palevioletred;
+}
+
+Static {
+  padding: 1;
+}

testbed/Textualize__textual/sandbox/will/add_remove.py

@@ -0,0 +1,71 @@
+import random
+
+from textual.containers import Horizontal, Vertical
+from textual.app import App, ComposeResult
+from textual.widgets import Button, Static
+
+
+class Thing(Static):
+    def on_show(self) -> None:
+        self.scroll_visible()
+
+
+class AddRemoveApp(App):
+    DEFAULT_CSS = """
+    #buttons {
+        dock: top;
+        height: auto;       
+    }
+    #buttons Button {
+        width: 1fr;
+    }
+    #items {
+        height: 100%;
+        overflow-y: scroll;
+    }
+    Thing {
+        height: 5;
+        background: $panel;
+        border: tall $primary;
+        margin: 1 1;
+        content-align: center middle;
+    }
+    """
+
+    def on_mount(self) -> None:
+        self.count = 0
+
+    def compose(self) -> ComposeResult:
+        yield Vertical(
+            Horizontal(
+                Button("Add", variant="success", id="add"),
+                Button("Remove", variant="error", id="remove"),
+                Button("Remove random", variant="warning", id="remove_random"),
+                id="buttons",
+            ),
+            Vertical(id="items"),
+        )
+
+    def on_button_pressed(self, event: Button.Pressed) -> None:
+        if event.button.id == "add":
+            self.count += 1
+            self.query("#items").first().mount(
+                Thing(f"Thing {self.count}", id=f"thing{self.count}")
+            )
+        elif event.button.id == "remove":
+            things = self.query("#items Thing")
+            if things:
+                things.last().remove()
+
+        elif event.button.id == "remove_random":
+            things = self.query("#items Thing")
+            if things:
+                random.choice(things).remove()
+
+        self.app.bell()
+
+
+app = AddRemoveApp()
+
+if __name__ == "__main__":
+    app.run()

testbed/Textualize__textual/sandbox/will/align.css

@@ -0,0 +1,14 @@
+Screen {
+    align: center middle;
+}
+
+Label {
+
+    width: 20;
+    height: 5;
+    background: blue;
+    color: white;
+    border: tall white;
+    margin: 1;
+    content-align: center middle;
+}

testbed/Textualize__textual/sandbox/will/align.py

@@ -0,0 +1,19 @@
+from textual.app import App, ComposeResult
+from textual.widgets import Static
+
+
+class Label(Static):
+    pass
+
+
+class AlignApp(App):
+    CSS_PATH = "align.css"
+
+    def compose(self) -> ComposeResult:
+        yield Label("Hello")
+        yield Label("World!")
+
+
+if __name__ == "__main__":
+    app = AlignApp()
+    app.run()

testbed/Textualize__textual/sandbox/will/basic.css

@@ -0,0 +1,265 @@
+/* CSS file for basic.py */
+
+
+
+ * {
+    transition: color 300ms linear, background 300ms linear;
+}
+
+Tweet.tall {
+  height: 24;
+}
+
+*:hover {
+  /* tint: 30% red;
+  /* outline: heavy red; */
+}
+
+App > Screen {
+  
+  color: $text;
+  layers: base sidebar;  
+  layout: vertical;
+  overflow: hidden;
+
+}
+
+#tree-container {
+  background: $panel;
+  overflow-y: auto;
+  height: 20;
+  margin: 1 2;
+  
+  padding: 1 2;
+}
+
+DirectoryTree {
+    padding: 0 1;
+    height: auto;
+
+}
+
+
+#table-container {
+  background: $panel;
+  height: auto;
+  margin: 1 2;
+}
+
+DataTable {
+  /*border:heavy red;*/
+  /* tint: 10% green; */
+  /* text-opacity: 50%; */
+ 
+  
+  margin: 1 2;
+  height: 24;
+}
+
+#sidebar {  
+  background: $panel;
+  color: $text;
+  dock: left;
+  width: 30;
+  margin-bottom: 1;
+  offset-x: -100%;
+
+  transition: offset 500ms in_out_cubic;
+  layer: sidebar;
+}
+
+#sidebar.-active {
+  offset-x: 0;
+}
+
+#sidebar .title {
+  height: 1;
+  background: $primary-background-darken-1;
+  color: $text;
+  border-right: wide $background;
+  content-align: center middle;
+}
+
+#sidebar .user {
+  height: 8;
+  background: $panel-darken-1;
+  color: $text;
+  border-right: wide $background;
+  content-align: center middle;
+}
+
+#sidebar .content {
+  background: $panel-darken-2;
+  color: $text;
+  border-right: wide $background;
+  content-align: center middle;
+}
+
+
+
+
+Tweet {
+  height:12;
+  width: 100%;
+  margin: 0 2;
+
+  margin:0 2;
+  background: $panel;
+  color: $text;
+  layout: vertical;
+  /* border: outer $primary; */
+  padding: 1;
+  border: wide $panel;
+  
+  /* scrollbar-gutter: stable; */
+  
+  box-sizing: border-box;
+
+}
+
+
+.scrollable {
+  overflow-x: auto;
+  overflow-y: scroll;
+  padding: 0 2;
+  margin: 1 2;
+  height: 24;
+  
+  layout: vertical;
+}
+
+.code {
+  height: auto;  
+}
+
+
+TweetHeader {
+  height:1;
+  background: $accent;
+  color: $text;
+}
+
+TweetBody {
+  width: 100%;
+  background: $panel;
+  color: $text;
+  height: auto;
+  padding: 0 1 0 0;
+}
+
+Tweet.scroll-horizontal {
+
+  overflow-x: auto;
+}
+
+Tweet.scroll-horizontal TweetBody {
+  width: 350;
+  
+}
+
+.button {
+  background: $accent;
+  color: $text;
+  width:20;
+  height: 3;
+  /* border-top: hidden  $accent-darken-3;  */
+  border: tall $accent-darken-2;
+  /* border-left: tall $accent-darken-1; */
+
+
+  /* padding: 1 0 0 0 ; */
+
+  transition: background 400ms in_out_cubic, color 400ms in_out_cubic;
+
+}
+
+.button:hover {
+  background: $accent-lighten-1;
+  color: $text;
+  width: 20;
+  height: 3;
+  border: tall $accent-darken-1;
+  /* border-left: tall $accent-darken-3; */
+
+
+
+
+}
+
+#footer {
+  color: $text;
+  background: $accent;
+  height: 1;
+
+  content-align: center middle;
+  dock:bottom;
+}
+
+
+#sidebar .content {
+  layout: vertical;
+}
+
+OptionItem {
+  height: 3;
+  background: $panel;
+  border-right: wide $background;
+  border-left: blank;
+  content-align: center middle;
+}
+
+OptionItem:hover {
+  height: 3;
+  color: $text;
+  background: $primary-darken-1;
+  /* border-top: hkey $accent2-darken-3;
+  border-bottom: hkey $accent2-darken-3; */
+  text-style: bold;
+  border-left: outer $secondary-darken-2;
+}
+
+Error {
+  width: 100%;
+  height:3;
+  background: $error;
+  color: $text;
+  border-top: tall $error-darken-2;
+  border-bottom: tall $error-darken-2;
+
+  padding: 0;
+  text-style: bold;
+  content-align: center middle;
+}
+
+Warning {
+  width: 100%;
+  height:3;
+  background: $warning;
+  color: $text;
+  border-top: tall $warning-darken-2;
+  border-bottom: tall $warning-darken-2;
+
+  text-style: bold;
+  content-align: center middle;
+}
+
+Success {
+  width: 100%;
+
+  height:auto;
+  box-sizing: border-box;
+  background: $success;
+  color: $text;
+
+  border-top: hkey $success-darken-2;
+  border-bottom: hkey $success-darken-2;
+
+  text-style: bold ;
+
+  content-align: center middle;
+}
+
+
+.horizontal {
+  layout: horizontal
+}

testbed/Textualize__textual/sandbox/will/basic.py

@@ -0,0 +1,243 @@
+from rich.console import RenderableType
+
+from rich.syntax import Syntax
+from rich.text import Text
+
+from textual.app import App, ComposeResult
+from textual.reactive import Reactive
+from textual.widget import Widget
+from textual.widgets import Static, DataTable, DirectoryTree, Header, Footer
+from textual.containers import Container, Vertical
+
+CODE = '''
+from __future__ import annotations
+
+from typing import Iterable, TypeVar
+
+T = TypeVar("T")
+
+
+def loop_first(values: Iterable[T]) -> Iterable[tuple[bool, T]]:
+    """Iterate and generate a tuple with a flag for first value."""
+    iter_values = iter(values)
+    try:
+        value = next(iter_values)
+    except StopIteration:
+        return
+    yield True, value
+    for value in iter_values:
+        yield False, value
+
+
+def loop_last(values: Iterable[T]) -> Iterable[tuple[bool, T]]:
+    """Iterate and generate a tuple with a flag for last value."""
+    iter_values = iter(values)
+    try:
+        previous_value = next(iter_values)
+    except StopIteration:
+        return
+    for value in iter_values:
+        yield False, previous_value
+        previous_value = value
+    yield True, previous_value
+
+
+def loop_first_last(values: Iterable[T]) -> Iterable[tuple[bool, bool, T]]:
+    """Iterate and generate a tuple with a flag for first and last value."""
+    iter_values = iter(values)
+    try:
+        previous_value = next(iter_values)
+    except StopIteration:
+        return
+    first = True
+    for value in iter_values:
+        yield first, False, previous_value
+        first = False
+        previous_value = value
+    yield first, True, previous_value
+'''
+
+
+lorem_short = """Lorem ipsum dolor sit amet, consectetur adipiscing elit. In velit liber a a a, volutpat nec hendrerit at, faucibus in odio. Aliquam hendrerit nibh sed quam volutpat maximus. Nullam suscipit convallis lorem quis sodales. In tristique lobortis ante et dictum. Ut at finibus ipsum."""
+lorem = (
+    lorem_short
+    + """ In urna dolor, placerat et mi facilisis, congue sollicitudin massa. Phasellus felis turpis, cursus eu lectus et, porttitor malesuada augue. Sed feugiat volutpat velit, sollicitudin fringilla velit bibendum faucibus. Lorem ipsum dolor sit amet, consectetur adipiscing elit. In velit libero, volutpat nec hendrerit at, faucibus in odio. Aliquam hendrerit nibh sed quam volutpat maximus. Nullam suscipit convallis lorem quis sodales. In tristique lobortis ante et dictum. Ut at finibus ipsum. In urna dolor, placerat et mi facilisis, congue sollicitudin massa. Phasellus felis turpis, cursus eu lectus et, porttitor malesuada augue. Sed feugiat volutpat velit, sollicitudin fringilla velit bibendum faucibus. """
+)
+
+lorem_short_text = Text.from_markup(lorem_short)
+lorem_long_text = Text.from_markup(lorem * 2)
+
+
+class TweetHeader(Static):
+    def render(self) -> RenderableType:
+        return Text("Lorem Impsum", justify="center")
+
+
+class TweetBody(Static):
+    short_lorem = Reactive(False)
+
+    def render(self) -> Text:
+        return lorem_short_text if self.short_lorem else lorem_long_text
+
+
+class Tweet(Vertical):
+    pass
+
+
+class OptionItem(Static):
+    def render(self) -> Text:
+        return Text("Option")
+
+
+class Error(Static):
+    def render(self) -> Text:
+        return Text("This is an error message", justify="center")
+
+
+class Warning(Static):
+    def render(self) -> Text:
+        return Text("This is a warning message", justify="center")
+
+
+class Success(Static):
+    def render(self) -> Text:
+        return Text("This is a success  message", justify="center")
+
+
+class BasicApp(App):
+    """A basic app demonstrating CSS"""
+
+    CSS_PATH = "basic.css"
+
+    def on_load(self):
+        """Bind keys here."""
+        self.bind("s", "toggle_class('#sidebar', '-active')", description="Sidebar")
+        self.bind("d", "toggle_dark", description="Dark mode")
+        self.bind("q", "quit", description="Quit")
+        self.bind("f", "query_test", description="Query test")
+
+    def compose(self):
+        yield Header()
+
+        table = DataTable()
+        self.scroll_to_target = Tweet(TweetBody())
+
+        yield Vertical(
+            Tweet(TweetBody()),
+            Tweet(
+                Static(
+                    Syntax(
+                        CODE,
+                        "python",
+                        theme="ansi_dark",
+                        line_numbers=True,
+                        indent_guides=True,
+                    ),
+                    classes="code",
+                ),
+                classes="tall",
+            ),
+            Container(table, id="table-container"),
+            Container(DirectoryTree("~/"), id="tree-container"),
+            Error(),
+            Tweet(TweetBody(), classes="scrollbar-size-custom"),
+            Warning(),
+            Tweet(TweetBody(), classes="scroll-horizontal"),
+            Success(),
+            Tweet(TweetBody(), classes="scroll-horizontal"),
+            Tweet(TweetBody(), classes="scroll-horizontal"),
+            Tweet(TweetBody(), classes="scroll-horizontal"),
+            Tweet(TweetBody(), classes="scroll-horizontal"),
+            Tweet(TweetBody(), classes="scroll-horizontal"),
+        )
+        yield Widget(
+            Static("Title", classes="title"),
+            Static("Content", classes="user"),
+            OptionItem(),
+            OptionItem(),
+            OptionItem(),
+            Static(classes="content"),
+            id="sidebar",
+        )
+        yield Footer()
+
+        table.add_column("Foo", width=20)
+        table.add_column("Bar", width=20)
+        table.add_column("Baz", width=20)
+        table.add_column("Foo", width=20)
+        table.add_column("Bar", width=20)
+        table.add_column("Baz", width=20)
+        table.zebra_stripes = True
+        for n in range(100):
+            table.add_row(*[f"Cell ([b]{n}[/b], {col})" for col in range(6)])
+
+    def on_mount(self):
+        self.sub_title = "Widget demo"
+
+    async def on_key(self, event) -> None:
+        await self.dispatch_key(event)
+
+    def action_toggle_dark(self):
+        self.dark = not self.dark
+
+    def action_query_test(self):
+        query = self.query("Tweet")
+        self.log(query)
+        self.log(query.nodes)
+        self.log(query)
+        self.log(query.nodes)
+
+        query.set_styles("outline: outer red;")
+
+        query = query.exclude(".scroll-horizontal")
+        self.log(query)
+        self.log(query.nodes)
+
+        # query = query.filter(".rubbish")
+        # self.log(query)
+        # self.log(query.first())
+
+    async def key_q(self):
+        await self.shutdown()
+
+    def key_x(self):
+        self.panic(self.tree)
+
+    def key_escape(self):
+        self.app.bell()
+
+    def key_t(self):
+        # Pressing "t" toggles the content of the TweetBody widget, from a long "Lorem ipsum..." to a shorter one.
+        tweet_body = self.query("TweetBody").first()
+        tweet_body.short_lorem = not tweet_body.short_lorem
+
+    def key_v(self):
+        self.get_child(id="content").scroll_to_widget(self.scroll_to_target)
+
+    def key_space(self):
+        self.bell()
+
+
+app = BasicApp()
+
+if __name__ == "__main__":
+    app.run()
+
+    # from textual.geometry import Region
+    # from textual.color import Color
+
+    # print(Region.intersection.cache_info())
+    # print(Region.overlaps.cache_info())
+    # print(Region.union.cache_info())
+    # print(Region.split_vertical.cache_info())
+    # print(Region.__contains__.cache_info())
+    # from textual.css.scalar import Scalar
+
+    # print(Scalar.resolve_dimension.cache_info())
+
+    # from rich.style import Style
+    # from rich.cells import cached_cell_len
+
+    # print(Style._add.cache_info())
+
+    # print(cached_cell_len.cache_info())

testbed/Textualize__textual/sandbox/will/bindings.py

@@ -0,0 +1,54 @@
+from textual.app import App, ComposeResult
+from textual.widgets import Footer, Static
+
+
+class Focusable(Static, can_focus=True):
+    DEFAULT_CSS = """
+    Focusable {
+        background: blue 20%;        
+        height: 1fr;
+        padding: 1;
+    }
+    Focusable:hover {
+        outline: solid white;
+    }
+    Focusable:focus {
+        background: red 20%;
+    }
+
+    """
+
+
+class Focusable1(Focusable):
+
+    BINDINGS = [
+        ("a", "app.bell", "Ding"),
+    ]
+
+    def render(self) -> str:
+        return repr(self)
+
+
+class Focusable2(Focusable):
+    CSS = ""
+    BINDINGS = [
+        ("b", "app.bell", "Beep"),
+        ("f1", "app.quit", "QUIT"),
+    ]
+
+    def render(self) -> str:
+        return repr(self)
+
+
+class BindingApp(App):
+    BINDINGS = [("f1", "app.bell", "Bell")]
+
+    def compose(self) -> ComposeResult:
+        yield Focusable1()
+        yield Focusable2()
+        yield Footer()
+
+
+app = BindingApp()
+if __name__ == "__main__":
+    app.run()

testbed/Textualize__textual/sandbox/will/box.css

@@ -0,0 +1,28 @@
+Screen {
+    background: white;
+    color:black;
+}
+
+#box1 {
+    width: 10;
+    height: 5;
+    background: red 40%;
+    box-sizing: content-box;
+}
+
+
+#box2 {
+    width: 10;
+    height: 5;
+    padding: 1;
+    background:blue 40%;
+    box-sizing: content-box;
+}
+
+#box3 {
+    width: 10;
+    height: 5;
+    background:green 40%;
+    border: heavy;
+    box-sizing: content-box;
+}

testbed/Textualize__textual/sandbox/will/box.py

@@ -0,0 +1,13 @@
+from textual.app import App
+from textual.widgets import Static
+
+class BoxApp(App):
+
+    def compose(self):
+        yield Static("0123456789", id="box1")
+        yield Static("0123456789", id="box2")
+        yield Static("0123456789", id="box3")
+
+
+app = BoxApp(css_path="box.css")
+app.run()

testbed/Textualize__textual/sandbox/will/buttons.css

@@ -0,0 +1,24 @@
+
+Button {
+    margin: 1;
+    width: 100%;
+}
+
+Vertical {
+    height: auto;       
+}
+
+Horizontal {    
+    height: auto;    
+}
+
+Horizontal Button {
+    width: 20;
+    
+    margin: 1 2     ;
+}
+
+#scroll {
+    height: 10; 
+   
+}

testbed/Textualize__textual/sandbox/will/calculator.css

@@ -0,0 +1,32 @@
+Screen {
+    overflow: auto;
+}
+
+#calculator {
+    layout: grid;
+    grid-size: 4;
+    grid-gutter: 1 2;
+    grid-columns: 1fr;
+    grid-rows: 2fr 1fr 1fr 1fr 1fr 1fr;
+    margin: 1 2;
+    min-height:25;  
+    min-width: 26; 
+}
+
+Button {
+    width: 100%;
+    height: 100%;    
+}
+
+#numbers {
+    column-span: 4;
+    content-align: right middle;
+    padding: 0 1;
+    height: 100%;
+    background: $primary-lighten-2;
+    color: $text;
+}
+
+#number-0 {
+    column-span: 2;
+}

testbed/Textualize__textual/sandbox/will/calculator.py

@@ -0,0 +1,144 @@
+from decimal import Decimal
+
+from textual.app import App, ComposeResult
+from textual import events
+from textual.containers import Container
+from textual.reactive import Reactive
+from textual.widgets import Button, Static
+
+
+class CalculatorApp(App):
+    """A working 'desktop' calculator."""
+
+    numbers = Reactive.var("0")
+    show_ac = Reactive.var(True)
+    left = Reactive.var(Decimal("0"))
+    right = Reactive.var(Decimal("0"))
+    value = Reactive.var("")
+    operator = Reactive.var("plus")
+
+    KEY_MAP = {
+        "+": "plus",
+        "-": "minus",
+        ".": "point",
+        "*": "multiply",
+        "/": "divide",
+        "_": "plus-minus",
+        "%": "percent",
+        "=": "equals",
+    }
+
+    def watch_numbers(self, value: str) -> None:
+        """Called when numbers is updated."""
+        # Update the Numbers widget
+        self.query_one("#numbers", Static).update(value)
+
+    def compute_show_ac(self) -> bool:
+        """Compute switch to show AC or C button"""
+        return self.value in ("", "0") and self.numbers == "0"
+
+    def watch_show_ac(self, show_ac: bool) -> None:
+        """Called when show_ac changes."""
+        self.query_one("#c").display = not show_ac
+        self.query_one("#ac").display = show_ac
+
+    def compose(self) -> ComposeResult:
+        """Add our buttons."""
+        yield Container(
+            Static(id="numbers"),
+            Button("AC", id="ac", variant="primary"),
+            Button("C", id="c", variant="primary"),
+            Button("+/-", id="plus-minus", variant="primary"),
+            Button("%", id="percent", variant="primary"),
+            Button("÷", id="divide", variant="warning"),
+            Button("7", id="number-7"),
+            Button("8", id="number-8"),
+            Button("9", id="number-9"),
+            Button("×", id="multiply", variant="warning"),
+            Button("4", id="number-4"),
+            Button("5", id="number-5"),
+            Button("6", id="number-6"),
+            Button("-", id="minus", variant="warning"),
+            Button("1", id="number-1"),
+            Button("2", id="number-2"),
+            Button("3", id="number-3"),
+            Button("+", id="plus", variant="warning"),
+            Button("0", id="number-0"),
+            Button(".", id="point"),
+            Button("=", id="equals", variant="warning"),
+            id="calculator",
+        )
+
+    def on_key(self, event: events.Key) -> None:
+        """Called when the user presses a key."""
+
+        print(f"KEY {event} was pressed!")
+
+        def press(button_id: str) -> None:
+            self.query_one(f"#{button_id}", Button).press()
+            self.set_focus(None)
+
+        key = event.key
+        if key.isdecimal():
+            press(f"number-{key}")
+        elif key == "c":
+            press("c")
+            press("ac")
+        elif key in self.KEY_MAP:
+            press(self.KEY_MAP[key])
+
+    def on_button_pressed(self, event: Button.Pressed) -> None:
+        """Called when a button is pressed."""
+
+        button_id = event.button.id
+        assert button_id is not None
+
+        self.bell()  # Terminal bell
+
+        def do_math() -> None:
+            """Does the math: LEFT OPERATOR RIGHT"""
+            try:
+                if self.operator == "plus":
+                    self.left += self.right
+                elif self.operator == "minus":
+                    self.left -= self.right
+                elif self.operator == "divide":
+                    self.left /= self.right
+                elif self.operator == "multiply":
+                    self.left *= self.right
+                self.numbers = str(self.left)
+                self.value = ""
+            except Exception:
+                self.numbers = "Error"
+
+        if button_id.startswith("number-"):
+            number = button_id.partition("-")[-1]
+            self.numbers = self.value = self.value.lstrip("0") + number
+        elif button_id == "plus-minus":
+            self.numbers = self.value = str(Decimal(self.value or "0") * -1)
+        elif button_id == "percent":
+            self.numbers = self.value = str(Decimal(self.value or "0") / Decimal(100))
+        elif button_id == "point":
+            if "." not in self.value:
+                self.numbers = self.value = (self.value or "0") + "."
+        elif button_id == "ac":
+            self.value = ""
+            self.left = self.right = Decimal(0)
+            self.operator = "plus"
+            self.numbers = "0"
+        elif button_id == "c":
+            self.value = ""
+            self.numbers = "0"
+        elif button_id in ("plus", "minus", "divide", "multiply"):
+            self.right = Decimal(self.value or "0")
+            do_math()
+            self.operator = button_id
+        elif button_id == "equals":
+            if self.value:
+                self.right = Decimal(self.value)
+            do_math()
+
+
+app = CalculatorApp(css_path="calculator.css")
+if __name__ == "__main__":
+    app.run()

testbed/Textualize__textual/sandbox/will/center.py

@@ -0,0 +1,28 @@
+from textual.app import App
+from textual.widgets import Static
+
+
+class CenterApp(App):
+    DEFAULT_CSS = """
+    
+    CenterApp Screen {
+        layout: center;
+        overflow: auto auto;
+    }
+
+    CenterApp Static {
+        border: wide $primary;
+        background: $panel;
+        width: 50;
+        height: 20;
+        margin: 1 2;
+        content-align: center middle;
+    }
+    
+    """
+
+    def compose(self):
+        yield Static("Hello World!")
+
+
+app = CenterApp()

testbed/Textualize__textual/sandbox/will/center2.py

@@ -0,0 +1,55 @@
+from textual.app import App
+from textual.containers import Vertical, Center
+from textual.widgets import Static
+
+
+class CenterApp(App):
+    DEFAULT_CSS = """
+
+    #sidebar {
+        dock: left;
+        width: 32;
+        height: 100%;
+        border-right: vkey $primary;
+    }
+
+    #bottombar {
+        dock: bottom;
+        height: 12;
+        width: 100%;
+        border-top: hkey $primary;
+    }
+
+    #hello {
+        border: wide $primary;
+        width: 40;
+        height: 16;      
+        margin: 2 4;  
+    }
+
+    #sidebar.hidden {
+       width: 0;
+    }
+
+    Static {        
+        background: $panel;
+        color: $text;
+        content-align: center middle;
+    }
+    
+    """
+
+    def on_mount(self) -> None:
+        self.bind("t", "toggle_class('#sidebar', 'hidden')")
+
+    def compose(self):
+        yield Static("Sidebar", id="sidebar")
+        yield Vertical(
+            Static("Bottom bar", id="bottombar"),
+            Center(
+                Static("Hello World!", id="hello"),
+            ),
+        )
+
+
+app = CenterApp()