Update CHANGELOG for v4.2

Bug:https://github.com/ArthurSonzogni/FTXUI/issues/695

.clang-tidy

@@ -0,0 +1,24 @@
+---
+Checks: "*,
+        -abseil-*,
+        -altera-*,
+        -android-*,
+        -fuchsia-*,
+        -google-*,
+        -llvm*,
+        -modernize-use-trailing-return-type,
+        -zircon-*,
+        -bugprone-easily-swappable-parameters,
+        -cppcoreguidelines-non-private-member-variables-in-classes,
+        -misc-no-recursion,
+        -misc-non-private-member-variables-in-classes,
+        -modernize-use-nodiscard,
+        -readability-avoid-const-params-in-decls,
+        -readability-else-after-return,
+        -readability-identifier-length,
+        -readability-implicit-bool-conversion,
+        -readability-static-accessed-through-instance,
+"
+WarningsAsErrors: ''
+HeaderFilterRegex: ''
+FormatStyle:     none

.github/workflows/build.yaml

@@ -15,58 +15,103 @@ jobs:
   test:
     name: "Tests"
     strategy:
+      fail-fast: false
       matrix:
         include:
           - name: Linux GCC
             os: ubuntu-latest
-            compiler: g++-9
-            test: true
+            compiler: gcc
+            gcov_executable: gcov
 
           - name: Linux Clang
             os: ubuntu-latest
-            compiler: clang++
-            test: true
+            compiler: llvm
+            gcov_executable: "llvm-cov gcov"
 
           - name: MacOS clang
             os: macos-latest
-            compiler: clang++
-            test: true
+            compiler: llvm
+            gcov_executable: "llvm-cov gcov"
 
           - name: Windows MSVC
             os: windows-latest
             compiler: cl
-            test: false
 
     runs-on: ${{ matrix.os }}
     steps:
       - name: "Checkout repository"
         uses: actions/checkout@v2
 
-      - name: "Enable MSVC command prompt"
-        if: matrix.os == 'windows-latest'
-        uses: ilammy/msvc-dev-cmd@v1
+      - name: "Setup Cpp"
+        uses: aminya/setup-cpp@v1
+        with:
+          compiler: ${{ matrix.compiler }}
+          vcvarsall: ${{ contains(matrix.os, 'windows' )}}
+          cmake: true
+          ninja: true
+          clangtidy: true
+          cppcheck: false
+          gcovr: "5.0"
+          opencppcoverage: true
 
-      - name: "Install cmake"
-        uses: lukka/get-cmake@latest
-
-      - name: "Build debug mode"
+      # make sure coverage is only enabled for Debug builds, since it sets -O0
+      # to make sure coverage has meaningful results
+      - name: "Configure CMake"
         run: >
-          mkdir build;
-          cd build;
-          cmake ..
-          -DCMAKE_CXX_COMPILER=${{ matrix.compiler }}
-          -DFTXUI_BUILD_DOCS=OFF
-          -DFTXUI_BUILD_EXAMPLES=ON
-          -DFTXUI_BUILD_TESTS=ON
-          -DFTXUI_BUILD_TESTS_FUZZER=OFF
-          -DFTXUI_ENABLE_INSTALL=ON ;
-          cmake --build . --config Debug;
+          cmake -S .
+          -B ./build
+          -DCMAKE_BUILD_TYPE:STRING=Debug
+          -DFTXUI_ENABLE_COVERAGE:BOOL=ON
+          -DFTXUI_BUILD_DOCS:BOOL=OFF
+          -DFTXUI_BUILD_EXAMPLES:BOOL=ON
+          -DFTXUI_BUILD_TESTS:BOOL=ON
+          -DFTXUI_BUILD_TESTS_FUZZER:BOOL=OFF
+          -DFTXUI_ENABLE_INSTALL:BOOL=ON
+          -DFTXUI_DEV_WARNINGS:BOOL=ON ;
 
-      - name: "Run tests"
-        if: matrix.test
+      - name: "Build"
         run: >
-          cd build;
-          ./tests
+          cmake
+          --build ./build
+
+      - name: Unix - Test and coverage
+        if: runner.os != 'Windows'
+        working-directory: ./build
+        run: >
+          ctest -C Debug --rerun-failed --output-on-failure;
+          gcovr
+          -j ${{env.nproc}}
+          --delete
+          --root ../
+          --exclude "../examples"
+          --exclude ".*google.*"
+          --exclude ".*test.*"
+          --exclude-unreachable-branches
+          --exclude-throw-branches
+          --sort-uncovered
+          --print-summary
+          --xml-pretty
+          --xml
+          coverage.xml
+          .
+          --gcov-executable '${{ matrix.gcov_executable }}';
+
+      - name: Windows - Test and coverage
+        if: runner.os == 'Windows'
+        working-directory: ./build
+        run: >
+          OpenCppCoverage.exe
+          --export_type cobertura:coverage.xml
+          --cover_children
+          --
+          ctest -C Debug --rerun-failed --output-on-failure;
+
+      - name: Publish to codecov
+        uses: codecov/codecov-action@v3
+        with:
+          flags: ${{ runner.os }}
+          name: ${{ runner.os }}-coverage
+          files: ./build/coverage.xml
 
   # Create a release on new v* tags
   release:
@@ -116,8 +161,9 @@ jobs:
           -DFTXUI_BUILD_EXAMPLES=OFF
           -DFTXUI_BUILD_TESTS=OFF
           -DFTXUI_BUILD_TESTS_FUZZER=OFF
-          -DFTXUI_ENABLE_INSTALL=ON;
-          cmake --build . --config Release --target package;
+          -DFTXUI_ENABLE_INSTALL=ON
+          -DFTXUI_DEV_WARNINGS=ON ;
+          cmake --build . --target package;
       - uses: shogo82148/actions-upload-release-asset@v1
         with:
           upload_url: ${{ needs.release.outputs.upload_url }}
@@ -125,7 +171,7 @@ jobs:
           overwrite: true
   
   documentation:
-    needs: package
+    if: github.ref == 'refs/heads/master'
     runs-on: ubuntu-latest
     steps:
       - name: "Checkout repository"
@@ -146,9 +192,24 @@ jobs:
         run: >
           mkdir build;
           cd build;
-          emcmake cmake ..;
+          emcmake cmake ..
+          -DCMAKE_BUILD_TYPE=Release
+          -DFTXUI_BUILD_DOCS=ON
+          -DFTXUI_BUILD_EXAMPLES=ON
+          -DFTXUI_BUILD_TESTS=OFF
+          -DFTXUI_BUILD_TESTS_FUZZER=OFF
+          -DFTXUI_ENABLE_INSTALL=OFF
+          -DFTXUI_DEV_WARNINGS=ON ;
           cmake --build . --target doc;
-          rsync -amv --include='*/' --include='*.html' --include='*.js' --include='*.wasm' --exclude='*' examples doc/doxygen/html;
+          cmake --build . ;
+          rsync -amv
+          --include='*/'
+          --include='*.html'
+          --include='*.js'
+          --include='*.wasm'
+          --exclude='*'
+          examples
+          doc/doxygen/html;
 
       - name: "Deploy"
         uses: peaceiris/actions-gh-pages@v3

.nxxm/deps

@@ -1,5 +0,0 @@
-{
-  "platform": [
-    "GTest::+gtest"
-  ]
-}

CHANGELOG.md

@@ -1,8 +1,166 @@
 Changelog
 =========
 
-current (development) 
----------------------
+4.2
+---
+
+### Component
+- Bugfix: Support Fn keys for every terminal specifications.
+
+### Dom
+- Feature: Add `hyperlink` decorator. For instance:
+  ```cpp
+  auto link = text("Click here") | hyperlink("https://github.com/FTXUI")
+  ```
+  See the [OSC 8 page](https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda).
+  FTXUI support proposed by @aaleino in [#662](https://github.com/ArthurSonzogni/FTXUI/issues/662).
+
+### Screen
+- Fix huge performance bug affecting some compilers about unicode bisection.
+
+### Build
+- Check version compatibility when using cmake find_package()
+- Fix missing includes for some gcc versions.
+
+4.1.1
+-----
+
+### Component
+- Revert Feature: Support `ResizableSplit` with customizable separator.
+
+### Build
+- Check version compatibility when using cmake find_package()
+
+4.1.0 (abandonned)
+-----
+
+### Component
+- Feature: Support `ResizableSplit` with customizable separator.
+- Fix: Support arrow keys in application mode
+- Fix: Remove useless new line when using an alternative screen.
+
+### Dom
+- Feature: Add the dashed style for border and separator.
+- Feature: Add colored borders.
+- Feature: Add `LinearGradient`!
+- Improvement: Color::Interpolate() uses gamma correction.
+- Fix: Check the `graph` area is positive.
+
+### Build/Install
+- Use globally set CMAKE_CXX_STANDARD if it is set.
+- Expose the pkg-config file.
+
+4.0.0
+-----
+
+### DOM
+- Feature: more styles:
+  - `strikethrough`
+  - `underlinedDouble`
+- Feature: Customize the cursor. Add the following decorators:
+  - `focusCursorBlock`
+  - `focusCursorBlockBlinking`
+  - `focusCursorBar`
+  - `focusCursorBarBlinking`
+  - `focusCursorUnderline`
+  - `focusCursorUnderlineBlinking`
+- Bugfix: Fix `focus`/`select` when the `vbox`/`hbox`/`dbox` contains a
+  `flexbox`
+- Bugfix: Fix the selected/focused area. It used to be 1 cell larger/longer than
+  requested
+- Bugfix: Forward the selected/focused area from the child in gridbox.
+- Bugfix: Fix incorrect Canvas computed dimensions.
+- Bugfix: Support `vscroll_indicator` with a zero inner size.
+- Bugfix: Fix `vscroll_indicator` hidding the last column.
+
+### Component:
+- Feature: Add the `Modal` component.
+- Feature: `Slider` supports taking references for all its arguments.
+- Feature: `Slider` supports `SliderOption`. It supports:
+    - multiple directions.
+    - multiple colors.
+    - various values (value, min, max, increment).
+- Feature: Define `ScreenInteractive::Exit()`.
+- Feature: Add `Loop` to give developers a better control on the main loop. This
+  can be used to integrate FTXUI into another main loop, without taking the full
+  control.
+- Feature: `Input` supports CTRL+Left and CTRL+Right
+- Feature: Use a blinking bar in the `Input` component.
+- Improvement: The `Menu` keeps the focus when an entry is selected with the
+  mouse.
+- Bugfix: Add implementation of `ButtonOption::Border()`. It was missing.
+- Bugfix: Provide the correct key for F1-F4 and F11.
+- Feature: Add the `Hoverable` component decorators.
+
+### Screen
+- Feature: add `Box::Union(a,b) -> Box`
+- Bugfix: Fix resetting `dim` clashing with resetting of `bold`.
+- Feature: Add emscripten screen resize support.
+- Bugfix: Add unicode 13 support for full width characters.
+- Bugfix: Fix MSVC treating codecvt C++17 deprecated function as an error.
+
+### Build
+- Support using the google test version provided by the package manager.
+
+3.0.0
+-----
+
+### Build
+- **breaking**: The library prefix is now back to "lib" (the default). This
+    means non-cmake users should not link against "libftxui-dom" for instance.
+
+### Component
+- **Animations** module! Components can implement the `OnAnimation` method and
+  the animation::Animator to define some animated properties.
+  - `Menu` now support animations.
+  - `Button` now supports animations.
+- Support SIGTSTP. (ctrl+z).
+- Support task posting. `ScreenInteractive::Post(Task)`.
+- `Menu` can now be used in the 4 directions, using `MenuOption.direction`.
+- `Menu` can display an animated underline, using
+  `MenuOption.underline.enabled`.
+- `Button` is now taking the focus in frame.
+- **breaking** All the options are now using a transform function.
+- **breaking** The `Toggle` component is now implemented using `Menu`.
+- **bugfix** Container::Tab implements `Focusable()`.
+- **bugfix** Improved default implementations of ComponentBase `Focusable()` and
+  `ActiveChild()` methods.
+- **bugfix** Automatically convert '\r' keys into '\n' for Linux programs that
+  do not send the correct code for the return key, like the 'bind'.
+  https://github.com/ArthurSonzogni/FTXUI/issues/337
+- Add decorator for components:
+  - `operator|(Component, ComponentDecorator)`
+  - `operator|(Component, ElementDecorator)`
+  - `operator|=(Component, ComponentDecorator)`
+  - `operator|=(Component, ElementDecorator)`
+  - Add the `Maybe` decorator.
+  - Add the `CatchEvent` decorator.
+  - Add the `Renderer` decorator.
+- **breaking** remove the "deprectated.hpp" header and Input support for wide
+    string.
+
+### DOM:
+- **breaking**: The `inverted` decorator now toggle in the inverted attribute.
+- Add `gauge` for the 4 directions. Expose the following API:
+```cpp
+Element gauge(float ratio);
+Element gaugeLeft(float ratio);
+Element gaugeRight(float ratio);
+Element gaugeUp(float ratio);
+Element gaugeDown(float ratio);
+Element gaugeDirection(float ratio, GaugeDirection);
+```
+- Add `separatorHSelector` and `separatorVSelector` elements. This can be used
+  to highlight an area.
+- Add the `automerge` decorator. This makes separator characters to be merged
+  with others nearby.
+- Fix the `Table` rendering function, to allow automerging characters.
+- **Bugfix**: The `vscroll_indicator` now computes its offset and size
+  correctly.
+- Add the `operator|=(Element, Decorator)`
+
+### Screen:
+- Add: `Color::Interpolate(lambda, color_a, color_b)`.
 
 2.0.0
 -----

CMakeLists.txt

@@ -2,7 +2,8 @@ cmake_minimum_required(VERSION 3.11)
 
 project(ftxui
   LANGUAGES CXX
-  VERSION 2.0.0
+  VERSION 4.1.1
+  DESCRIPTION "C++ Functional Terminal User Interface."
 )
 
 option(FTXUI_BUILD_DOCS "Set to ON to build docs" ON)
@@ -10,6 +11,9 @@ option(FTXUI_BUILD_EXAMPLES "Set to ON to build examples" ON)
 option(FTXUI_BUILD_TESTS "Set to ON to build tests" OFF)
 option(FTXUI_BUILD_TESTS_FUZZER "Set to ON to enable fuzzing" OFF)
 option(FTXUI_ENABLE_INSTALL "Generate the install target" ON)
+option(FTXUI_CLANG_TIDY "Execute clang-tidy" OFF)
+option(FTXUI_ENABLE_COVERAGE "Execute code coverage" OFF)
+option(FTXUI_DEV_WARNINGS "Enable more compiler warnings and warnings as errors" OFF)
 
 set(FTXUI_MICROSOFT_TERMINAL_FALLBACK_HELP_TEXT "On windows, assume the \
 terminal used will be one of Microsoft and use a set of reasonnable fallback \
@@ -22,6 +26,7 @@ else()
     ${FTXUI_MICROSOFT_TERMINAL_FALLBACK_HELP_TEXT} OFF)
 endif()
 
+
 add_library(screen
   include/ftxui/screen/box.hpp
   include/ftxui/screen/color.hpp
@@ -44,8 +49,10 @@ add_library(dom
   include/ftxui/dom/node.hpp
   include/ftxui/dom/requirement.hpp
   include/ftxui/dom/take_any_args.hpp
+  src/ftxui/dom/automerge.cpp
   src/ftxui/dom/blink.cpp
   src/ftxui/dom/bold.cpp
+  src/ftxui/dom/hyperlink.cpp
   src/ftxui/dom/border.cpp
   src/ftxui/dom/box_helper.cpp
   src/ftxui/dom/box_helper.hpp
@@ -67,6 +74,7 @@ add_library(dom
   src/ftxui/dom/gridbox.cpp
   src/ftxui/dom/hbox.cpp
   src/ftxui/dom/inverted.cpp
+  src/ftxui/dom/linear_gradient.cpp
   src/ftxui/dom/node.cpp
   src/ftxui/dom/node_decorator.cpp
   src/ftxui/dom/paragraph.cpp
@@ -75,32 +83,43 @@ add_library(dom
   src/ftxui/dom/separator.cpp
   src/ftxui/dom/size.cpp
   src/ftxui/dom/spinner.cpp
+  src/ftxui/dom/strikethrough.cpp
   src/ftxui/dom/table.cpp
   src/ftxui/dom/text.cpp
   src/ftxui/dom/underlined.cpp
+  src/ftxui/dom/underlined_double.cpp
   src/ftxui/dom/util.cpp
   src/ftxui/dom/vbox.cpp
 )
 
 add_library(component
+  include/ftxui/component/animation.hpp
   include/ftxui/component/captured_mouse.hpp
   include/ftxui/component/component.hpp
   include/ftxui/component/component_base.hpp
+  include/ftxui/component/component_options.hpp
   include/ftxui/component/event.hpp
+  include/ftxui/component/loop.hpp
   include/ftxui/component/mouse.hpp
   include/ftxui/component/receiver.hpp
   include/ftxui/component/screen_interactive.hpp
+  include/ftxui/component/task.hpp
+  src/ftxui/component/animation.cpp
   src/ftxui/component/button.cpp
   src/ftxui/component/catch_event.cpp
   src/ftxui/component/checkbox.cpp
   src/ftxui/component/collapsible.cpp
   src/ftxui/component/component.cpp
+  src/ftxui/component/component_options.cpp
   src/ftxui/component/container.cpp
   src/ftxui/component/dropdown.cpp
   src/ftxui/component/event.cpp
+  src/ftxui/component/hoverable.cpp
   src/ftxui/component/input.cpp
+  src/ftxui/component/loop.cpp
   src/ftxui/component/maybe.cpp
   src/ftxui/component/menu.cpp
+  src/ftxui/component/modal.cpp
   src/ftxui/component/radiobox.cpp
   src/ftxui/component/radiobox.cpp
   src/ftxui/component/renderer.cpp
@@ -109,44 +128,41 @@ add_library(component
   src/ftxui/component/slider.cpp
   src/ftxui/component/terminal_input_parser.cpp
   src/ftxui/component/terminal_input_parser.hpp
-  src/ftxui/component/toggle.cpp
+  src/ftxui/component/util.cpp
 )
 
 target_link_libraries(dom
   PUBLIC screen
 )
 
-find_package(Threads)
 target_link_libraries(component
   PUBLIC dom
-  PUBLIC Threads::Threads
 )
 
-set_target_properties(screen PROPERTIES VERSION ${PROJECT_VERSION})
-set_target_properties(dom PROPERTIES VERSION ${PROJECT_VERSION})
-set_target_properties(component PROPERTIES VERSION ${PROJECT_VERSION})
+if (NOT EMSCRIPTEN)
+  find_package(Threads)
+  target_link_libraries(component
+    PUBLIC Threads::Threads
+  )
+endif()
 
 include(cmake/ftxui_set_options.cmake)
 ftxui_set_options(screen)
 ftxui_set_options(dom)
 ftxui_set_options(component)
 
-if (FTXUI_BUILD_TESTS AND ${CMAKE_VERSION} VERSION_GREATER "3.11.4")
-  include(cmake/ftxui_test.cmake)
-endif()
-
-if(FTXUI_BUILD_EXAMPLES)
-  add_subdirectory(examples)
-endif()
-
-if(FTXUI_BUILD_DOCS)
-  add_subdirectory(doc)
-endif()
+include(cmake/ftxui_coverage.cmake)
+ftxui_check_coverage(screen)
+ftxui_check_coverage(dom)
+ftxui_check_coverage(component)
 
+include(cmake/ftxui_test.cmake)
+include(cmake/ftxui_benchmark.cmake)
+include(cmake/ftxui_fuzzer.cmake)
 include(cmake/iwyu.cmake)
 include(cmake/ftxui_export.cmake)
+include(cmake/ftxui_install.cmake)
+include(cmake/ftxui_package.cmake)
 
-if(FTXUI_ENABLE_INSTALL)
-  include(cmake/ftxui_install.cmake)
-  include(cmake/ftxui_package.cmake)
-endif()
+add_subdirectory(examples)
+add_subdirectory(doc)

README.md

@@ -8,10 +8,14 @@
   <a href="#"><img src="https://img.shields.io/github/repo-size/ArthurSonzogni/FTXUI"></img></a>
   <a href="https://github.com/ArthurSonzogni/FTXUI/issues"><img src="https://img.shields.io/github/issues/ArthurSonzogni/FTXUI"></img></a>
   <a href="https://github.com/ArthurSonzogni/FTXUI/graphs/contributors"><img src="https://img.shields.io/github/contributors/arthursonzogni/FTXUI?color=blue"></img></a>
+  <a href="https://codecov.io/gh/ArthurSonzogni/FTXUI">
+    <img src="https://codecov.io/gh/ArthurSonzogni/FTXUI/branch/master/graph/badge.svg?token=C41FdRpNVA"/>
+  </a>
+
   
   <br/>
   <a href="https://arthursonzogni.github.io/FTXUI/">Documentation</a> ·
-  <a href="https://github.com/ArthurSonzogni/FTXUI/issues">Report Bug</a> ·
+  <a href="https://github.com/ArthurSonzogni/FTXUI/issues">Report a Bug</a> ·
   <a href="https://arthursonzogni.github.io/FTXUI/examples.html">Examples</a> .
   <a href="https://github.com/ArthurSonzogni/FTXUI/issues">Request Feature</a> ·
   <a href="https://github.com/ArthurSonzogni/FTXUI/pulls">Send a Pull Request</a>
@@ -22,21 +26,34 @@
 
 <i>Functional Terminal (X) User interface</i>
 
-A simple C++ library for terminal based user interface.
+A simple C++ library for terminal based user interfaces!
 
 ## Feature
  * Functional style. Inspired by
    [[1]](https://hackernoon.com/building-reactive-terminal-interfaces-in-c-d392ce34e649?gi=d9fb9ce35901)
    and [React](https://reactjs.org/)
- * Simple and elegant syntax (in my opinion).
- * Support for [UTF8](https://en.wikipedia.org/wiki/UTF-8) and [fullwidth chars](https://en.wikipedia.org/wiki/Halfwidth_and_fullwidth_forms) (→ 测试).
- * No dependencies.
- * Cross platform. Linux/mac (main target), Windows (experimental thanks to contributors), WebAssembly.
+ * Simple and elegant syntax (in my opinion)
  * Keyboard & mouse navigation.
+ * Support for [UTF8](https://en.wikipedia.org/wiki/UTF-8) and [fullwidth chars](https://en.wikipedia.org/wiki/Halfwidth_and_fullwidth_forms) (→ 测试)
+ * Support for animations. [Demo 1](https://arthursonzogni.github.io/FTXUI/examples/?file=component/menu_underline_animated_gallery), [Demo 2](https://arthursonzogni.github.io/FTXUI/examples/?file=component/button_style)
+ * Support for drawing. [Demo](https://arthursonzogni.github.io/FTXUI/examples/?file=component/canvas_animated)
+ * No dependencies
+ * Cross platform: Linux/MacOS (main target), WebAssembly, Windows (Thanks to contributors!).
+ * Learn by [examples](#documentation), and [tutorials](#documentation)
+ * Multiple packages: CMake [FetchContent](https://bewagner.net/programming/2020/05/02/cmake-fetchcontent/) (preferred), vcpkg, pkgbuild, conan.
+ * Good practises: documentation, tests, fuzzers, performance tests, automated CI, automated packaging, etc...
+
+## Documentation
+
+- [Starter example project](https://github.com/ArthurSonzogni/ftxui-starter)
+- [Documentation](https://arthursonzogni.github.io/FTXUI/)
+- [Examples (WebAssembly)](https://arthursonzogni.github.io/FTXUI/examples/)
+- [Build using CMake](https://arthursonzogni.github.io/FTXUI/#build-cmake)
 
 ## Operating systems
 
-- Webassembly
+This is expected to be cross platform. This supports / tests:
+- WebAssembly
 - Linux
 - MacOS
 - Windows
@@ -62,13 +79,6 @@ A simple C++ library for terminal based user interface.
 └────────────────────────────────────────────────────────────────────────────┘
 ~~~
 
-## Documentation
-
-- [Starter example project](https://github.com/ArthurSonzogni/ftxui-starter)
-- [Documentation](https://arthursonzogni.github.io/FTXUI/)
-- [Examples (WebAssembly)](https://arthursonzogni.com/FTXUI/examples/)
-- [Build using CMake](https://github.com/ArthurSonzogni/FTXUI/blob/master/doc/mainpage.md#using-cmake)
-
 ## Short gallery
 
 #### DOM
@@ -101,7 +111,7 @@ Element can become flexible using the the `flex` decorator.
 
 ![image](https://user-images.githubusercontent.com/4759106/147243064-780ac7cc-605b-475f-94b8-cf7c4aed03a5.png)
 
-[See](https://arthursonzogni.github.io/FTXUI/examples_2dom_2hflow_8cpp-example.html) also this [demo](https://arthursonzogni.com/FTXUI/examples/?file=component/flexbox).
+[See](https://arthursonzogni.github.io/FTXUI/examples_2dom_2hflow_8cpp-example.html) also this [demo](https://arthursonzogni.github.io/FTXUI/examples/?file=component/flexbox).
 
 </details>
 
@@ -112,21 +122,24 @@ An element can be decorated using the functions:
   - `dim`
   - `inverted`
   - `underlined`
+  - `underlinedDouble`
   - `blink`
+  - `strikethrough`
   - `color`
   - `bgcolor`
+  - `hyperlink`
 
 [Example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2style_gallery_8cpp-example.html)
 
 ![image](https://user-images.githubusercontent.com/4759106/147244118-380bf834-9e33-40df-9ff0-07c10f2598ef.png)
   
-FTXUI support the pipe operator. It means: `decorator1(decorator2(element))` and `element | decorator1 | decorator2` can be used.
+FTXUI supports the pipe operator. It means: `decorator1(decorator2(element))` and `element | decorator1 | decorator2` can be used.
   
 </details>
 
 <details><summary>Colors</summary>
 
-FTXUI support every color palettes:
+FTXUI support every color palette:
 
 Color [gallery](https://arthursonzogni.github.io/FTXUI/examples_2dom_2color_gallery_8cpp-example.html):
 ![image](https://user-images.githubusercontent.com/4759106/147248595-04c7245a-5b85-4544-809d-a5984fc6f9e7.png)
@@ -156,7 +169,7 @@ auto document = vbox({
 
 A simple piece of text is represented using `text("content")`.
 
-To support text wrapping following spaces the following function are provided:
+To support text wrapping following spaces the following functions are provided:
 ```cpp
 Element paragraph(std::string text);
 Element paragraphAlignLeft(std::string text);
@@ -165,7 +178,7 @@ Element paragraphAlignCenter(std::string text);
 Element paragraphAlignJustify(std::string text);
 ```
   
-[Paragraph example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2table_8cpp-example.html):
+[Paragraph example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2paragraph_8cpp-example.html)
   
 ![ezgif com-gif-maker (4)](https://user-images.githubusercontent.com/4759106/147251370-983a06e7-6f41-4113-92b8-942f43d34d06.gif)
 
@@ -202,7 +215,7 @@ Prebuilt components are declared in [<ftxui/component/component.hpp>](https://ar
 
 <details><summary>Gallery</summary>
 
-[Gallery](https://arthursonzogni.github.io/FTXUI/examples_2component_2gallery_8cpp-example.html) of multiple components. ([demo](https://arthursonzogni.com/FTXUI/examples/?file=component/gallery))
+[Gallery](https://arthursonzogni.github.io/FTXUI/examples_2component_2gallery_8cpp-example.html) of multiple components. ([demo](https://arthursonzogni.github.io/FTXUI/examples/?file=component/gallery))
 
 ![image](https://user-images.githubusercontent.com/4759106/147247330-b60beb9f-e665-48b4-81c0-4b01ee95bc66.png)
 
@@ -312,16 +325,54 @@ Feel free to add your projects here:
 - [TimeAccumulator](https://github.com/asari555/TimeAccumulator)
 - [vantage](https://github.com/gokulmaxi/vantage)
 - [tabdeeli](https://github.com/typon/tabdeeli)
+- [tiles](https://github.com/tusharpm/tiles)
+- [cachyos-cli-installer](https://github.com/cachyos/new-cli-installer)
+- [beagle-config](https://github.com/SAtacker/beagle-config)
+- [turing_cmd](https://github.com/DanArmor/turing_cmd)
+- [StartUp](https://github.com/StubbornVegeta/StartUp)
+- [eCAL monitor](https://github.com/eclipse-ecal/ecal)
 
-## Hosted on
- * [github](https://github.com/ArthurSonzogni/ftxui)
- * [gitlab](https://gitlab.com/ArthurSonzogni/ftxui)
+## [cpp-best-practices/game_jam](https://github.com/cpp-best-practices/game_jam)
+
+Several games using the FTXUI have been made during the Game Jam:
+- [TermBreaker](https://github.com/ArthurSonzogni/termBreaker) [**[Play web version]**](https://arthursonzogni.com/TermBreaker/)
+- [Minesweeper Marathon](https://github.com/cpp-best-practices/game_jam/blob/main/Jam1_April_2022/minesweeper_marathon.md) [**[Play web version]**](https://barlasgarden.com/minesweeper/index.html)
+- [Grand Rounds](https://github.com/cpp-best-practices/game_jam/blob/main/Jam1_April_2022/grandrounds.md)
+- [LightsRound](https://github.com/cpp-best-practices/game_jam/blob/main/Jam1_April_2022/LightsRound.v.0.1.0.md)
+- [DanteO](https://github.com/cpp-best-practices/game_jam/blob/main/Jam1_April_2022/danteo.md)
+- [Sumo](https://github.com/cpp-best-practices/game_jam/blob/main/Jam1_April_2022/sumo.md)
+- [Drag Me aROUND](https://github.com/cpp-best-practices/game_jam/blob/main/Jam1_April_2022/drag_me_around.md)
+- [DisarmSelfDestruct](https://github.com/cpp-best-practices/game_jam/blob/main/Jam1_April_2022/DisarmSelfDestruct.md)
+- [TheWorld](https://github.com/cpp-best-practices/game_jam/blob/main/Jam1_April_2022/TheWorld.md)
+- [smoothlife](https://github.com/cpp-best-practices/game_jam/blob/main/Jam1_April_2022/smoothlife.md)
+- [Consu](https://github.com/cpp-best-practices/game_jam/blob/main/Jam1_April_2022/consu.md)
 
 ## External package
 
-It is **highly** recommanded to use cmake FetchContent to depends on FTXUI. This
-way you can specify which commit you would like to depends on.
+It is **highly** recommended to use CMake FetchContent to depend on FTXUI. This
+way you can specify which commit you would like to depend on.
+```cmake
+include(FetchContent)
+
+FetchContent_Declare(ftxui
+  GIT_REPOSITORY https://github.com/ArthurSonzogni/ftxui
+  GIT_TAG v3.0.0
+)
+
+FetchContent_GetProperties(ftxui)
+if(NOT ftxui_POPULATED)
+  FetchContent_Populate(ftxui)
+  add_subdirectory(${ftxui_SOURCE_DIR} ${ftxui_BINARY_DIR} EXCLUDE_FROM_ALL)
+endif()
+```
 
 If you don't, the following packages have been created:
-- vcpkg ([soon](https://github.com/ArthurSonzogni/FTXUI/issues/112))
+- [vcpkg](https://vcpkgx.com/details.html?package=ftxui)
 - [Arch Linux PKGBUILD](https://aur.archlinux.org/packages/ftxui-git/).
+- [conan.io](https://conan.io/center/ftxui)
+
+## Contributors
+
+<a href="https://github.com/ArthurSonzogni/FTXUI/graphs/contributors">
+  <img src="https://contrib.rocks/image?repo=ArthurSonzogni/FTXUI" />
+</a>

cmake/ftxui-config.cmake.in

@@ -2,3 +2,5 @@
 
 include(CMakeFindDependencyMacro)
 find_dependency(Threads)
+
+include("${CMAKE_CURRENT_LIST_DIR}/ftxui-targets.cmake")

cmake/ftxui_benchmark.cmake

@@ -1,24 +1,21 @@
-if (NOT WIN32)
-  FetchContent_Declare(googlebenchmark
-    GIT_REPOSITORY "https://github.com/google/benchmark"
-    GIT_TAG 62937f91b5c763a8e119d0c20c67b87bde8eff1c 
-  )
-
-  FetchContent_GetProperties(googlebenchmark)
-  if(NOT googlebenchmark_POPULATED)
-    FetchContent_Populate(googlebenchmark)
-    add_subdirectory(${googlebenchmark_SOURCE_DIR} ${googlebenchmark_BINARY_DIR} EXCLUDE_FROM_ALL)
-  endif()
-
-  add_executable(ftxui_benchmark
-    src/ftxui/dom/benchmark_test.cpp
-  )
-  target_link_libraries(ftxui_benchmark
-    PRIVATE dom
-    PRIVATE benchmark::benchmark
-    PRIVATE benchmark::benchmark_main
-  )
-  target_include_directories(ftxui_benchmark
-    PRIVATE src
-  )
+if (NOT FTXUI_BUILD_TESTS OR
+    NOT ${CMAKE_VERSION} VERSION_GREATER "3.11.4" OR
+    WIN32
+    )
+  return()
 endif()
+
+include(cmake/ftxui_find_google_benchmark.cmake)
+
+add_executable(ftxui-benchmark
+  src/ftxui/dom/benchmark_test.cpp
+  )
+ftxui_set_options(ftxui-benchmark)
+target_link_libraries(ftxui-benchmark
+  PRIVATE dom
+  PRIVATE benchmark::benchmark
+  PRIVATE benchmark::benchmark_main
+  )
+target_include_directories(ftxui-benchmark
+  PRIVATE src
+  )

cmake/ftxui_coverage.cmake

@@ -0,0 +1,8 @@
+function(ftxui_check_coverage library)
+  if (FTXUI_ENABLE_COVERAGE)
+    if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" OR CMAKE_CXX_COMPILER_ID MATCHES ".*Clang")
+      target_compile_options(${library} INTERFACE --coverage -O0 -g)
+      target_link_libraries(${library} INTERFACE --coverage)
+    endif()
+  endif()
+endfunction()

cmake/ftxui_export.cmake

@@ -4,5 +4,5 @@ add_library(ftxui::component ALIAS component)
 export(
   TARGETS screen dom component
   NAMESPACE ftxui::
-  FILE ${PROJECT_BINARY_DIR}/ftxui-targets.cmake
+  FILE "${PROJECT_BINARY_DIR}/ftxui-targets.cmake"
 )

cmake/ftxui_find_google_benchmark.cmake

@@ -0,0 +1,32 @@
+# Some developers would be happier with the google benchmark version provided
+# from their package manager. Use it if it is installed the package provide
+# cmake support.
+# https://github.com/ArthurSonzogni/FTXUI/issues/551
+find_package(benchmark QUIET)
+if (benchmark_FOUND)
+  return()
+endif()
+
+option(FETCHCONTENT_UPDATES_DISCONNECTED TRUE)
+option(FETCHCONTENT_QUIET FALSE)
+include(FetchContent)
+
+FetchContent_Declare(googlebenchmark
+  GIT_REPOSITORY "https://github.com/google/benchmark"
+  GIT_TAG        62937f91b5c763a8e119d0c20c67b87bde8eff1c 
+  GIT_PROGRESS   TRUE
+)
+
+FetchContent_GetProperties(googlebenchmark)
+set (BENCHMARK_ENABLE_GTEST_TESTS OFF CACHE INTERNAL "")
+set (BENCHMARK_ENABLE_TESTING OFF CACHE INTERNAL "")
+if(googlebenchmark_POPULATED)
+  return()
+endif()
+
+FetchContent_Populate(googlebenchmark)
+add_subdirectory(
+  ${googlebenchmark_SOURCE_DIR}
+  ${googlebenchmark_BINARY_DIR}
+  EXCLUDE_FROM_ALL
+)

cmake/ftxui_find_google_test.cmake

@@ -0,0 +1,33 @@
+# Some developers would be happier with the gtest version provided from their
+# package manager. Use it if it is installed the package provide cmake support.
+# https://github.com/ArthurSonzogni/FTXUI/issues/551
+find_package(GTest QUIET)
+
+if (GTest_FOUND)
+  return()
+endif()
+
+option(FETCHCONTENT_UPDATES_DISCONNECTED TRUE)
+option(FETCHCONTENT_QUIET FALSE)
+include(FetchContent)
+
+FetchContent_Declare(googletest
+  GIT_REPOSITORY "https://github.com/google/googletest"
+  GIT_TAG        23ef29555ef4789f555f1ba8c51b4c52975f0907
+  GIT_PROGRESS   TRUE
+)
+
+FetchContent_GetProperties(googletest)
+if(googletest_POPULATED)
+  return()
+endif()
+
+FetchContent_Populate(googletest)
+set(BUILD_GMOCK OFF CACHE INTERNAL "")
+set(INSTALL_GTEST OFF CACHE INTERNAL "")
+set(gtest_force_shared_crt ON CACHE INTERNAL "")
+add_subdirectory(
+  "${googletest_SOURCE_DIR}"
+  "${googletest_BINARY_DIR}"
+  EXCLUDE_FROM_ALL
+)

cmake/ftxui_fuzzer.cmake

@@ -1,22 +1,20 @@
+if (NOT FTXUI_BUILD_TESTS_FUZZER)
+  return()
+endif()
+
 set(CMAKE_C_COMPILER clang)
 set(CMAKE_CXX_COMPILER clang++)
+set(CMAKE_CXX_STANDARD 17)
 
 function(fuzz name)
   add_executable(${name}
     src/ftxui/component/${name}.cpp
   )
-  target_include_directories(${name}
-    PRIVATE src
-  )
-  target_link_libraries(${name}
-    PRIVATE component
-  )
-  target_compile_options(${name}
-    PRIVATE -fsanitize=fuzzer,address
-  )
-  target_link_libraries(${name}
-    PRIVATE -fsanitize=fuzzer,address
-  )
+  target_include_directories(${name} PRIVATE src)
+  target_link_libraries(${name} PRIVATE component)
+  target_compile_options(${name} PRIVATE -fsanitize=fuzzer,address)
+  target_link_libraries(${name} PRIVATE -fsanitize=fuzzer,address)
+  target_compile_features(${name} PRIVATE cxx_std_17)
 endfunction(fuzz)
 
 fuzz(terminal_input_parser_test_fuzzer)

cmake/ftxui_install.cmake

@@ -1,29 +1,60 @@
+if(NOT FTXUI_ENABLE_INSTALL)
+  return()
+endif()
+
 include(GNUInstallDirs)
-install(TARGETS screen dom component
-    EXPORT ftxui-export
-    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
-    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
-)
-
-install(DIRECTORY include/ftxui DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
-
 include(CMakePackageConfigHelpers)
-configure_package_config_file(ftxui-config.cmake.in
-  ${CMAKE_CURRENT_BINARY_DIR}/ftxui-config.cmake
-  INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/ftxui/cmake
-  PATH_VARS CMAKE_INSTALL_INCLUDEDIR
-)
-write_basic_package_version_file(
-  ftxui-config-version.cmake
-  VERSION ${PACKAGE_VERSION}
-  COMPATIBILITY AnyNewerVersion
-)
 
-install(FILES ${CMAKE_CURRENT_BINARY_DIR}/ftxui-config.cmake
-  DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/ftxui
-)
-install(EXPORT ftxui-export
-  FILE ftxui-config-version.cmake
+# ------------------------------------------------------------------------------
+# Install the library and its public headers into the standard subdirectories
+# ------------------------------------------------------------------------------
+install(
+  TARGETS screen dom component
+  EXPORT ftxui-targets
+  )
+
+install(
+  DIRECTORY include/ftxui
+  DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}"
+  )
+
+# ------------------------------------------------------------------------------
+# Install the exported cmake targets for use in other CMake projects.
+# ------------------------------------------------------------------------------
+install(
+  EXPORT ftxui-targets
   NAMESPACE ftxui::
-  DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/ftxui
-)
+  DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/ftxui"
+  )
+
+# ------------------------------------------------------------------------------
+# Create and install the ftuxi-config.cmake and ftuxi-config-version.cmake files
+# needed to support users of find_package()
+# ------------------------------------------------------------------------------
+configure_package_config_file(
+  "${CMAKE_CURRENT_SOURCE_DIR}/cmake/ftxui-config.cmake.in"
+  "${CMAKE_CURRENT_BINARY_DIR}/cmake/ftxui-config.cmake"
+  INSTALL_DESTINATION "${CMAKE_INSTALL_LIBDIR}/ftxui/cmake"
+  PATH_VARS CMAKE_INSTALL_INCLUDEDIR
+  )
+write_basic_package_version_file(
+  "${CMAKE_CURRENT_BINARY_DIR}/cmake/ftxui-config-version.cmake"
+  VERSION ${PACKAGE_VERSION}
+  COMPATIBILITY SameMajorVersion
+  )
+install(
+  FILES
+  "${CMAKE_CURRENT_BINARY_DIR}/cmake/ftxui-config.cmake"
+  "${CMAKE_CURRENT_BINARY_DIR}/cmake/ftxui-config-version.cmake"
+  DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/ftxui"
+  )
+
+# ------------------------------------------------------------------------------
+# Create and install pkg-config file for easy use of library in build systems
+# other than CMake:
+# ------------------------------------------------------------------------------
+configure_file(ftxui.pc.in ${CMAKE_CURRENT_BINARY_DIR}/ftxui.pc @ONLY)
+install(
+  FILES "${CMAKE_CURRENT_BINARY_DIR}/ftxui.pc"
+  DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig"
+  )

cmake/ftxui_package.cmake

@@ -1,3 +1,7 @@
+if(NOT FTXUI_ENABLE_INSTALL)
+  return()
+endif()
+
 if (UNIX AND NOT APPLE)
   set(CPACK_GENERATOR "DEB;External;RPM;STGZ;TBZ2;TGZ;TXZ;TZ;TZST;ZIP")
 elseif (UNIX AND APPLE)

cmake/ftxui_set_options.cmake

@@ -1,16 +1,48 @@
+find_program(CLANG_TIDY_EXE NAMES "clang-tidy" DOC "Path to clang-tidy executable" )
+if(NOT CLANG_TIDY_EXE)
+  message(STATUS "clang-tidy not found.")
+else()
+  message(STATUS "clang-tidy found: ${CLANG_TIDY_EXE}")
+endif()
+
 function(ftxui_set_options library)
-  set_target_properties(${library} PROPERTIES PREFIX "ftxui-")
+  message(STATUS "ftxui_set_options " ${library})
+  set_target_properties(${library} PROPERTIES VERSION ${PROJECT_VERSION})
+  if (NOT ${library} MATCHES "ftxui-*")
+    set_target_properties(${library} PROPERTIES OUTPUT_NAME "ftxui-${library}")
+  endif()
 
+  if(CLANG_TIDY_EXE AND FTXUI_CLANG_TIDY)
+    set_target_properties(${library}
+      PROPERTIES CXX_CLANG_TIDY "${CLANG_TIDY_EXE};-warnings-as-errors=*"
+    )
 
-  target_include_directories(${library}
-    PUBLIC
+    # By using "PUBLIC" as opposed to "SYSTEM INTERFACE", the compiler warning
+    # are enforced on the headers. This is behind "FTXUI_CLANG_TIDY", so that it
+    # applies only when developing FTXUI and on the CI. User's of the library
+    # get only the SYSTEM INTERFACE instead.
+    target_include_directories(${library}
+      PUBLIC
+        $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+    )
+  else()
+    target_include_directories(${library} SYSTEM
+      INTERFACE
+        $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+    )
+  endif()
+
+  target_include_directories(${library} SYSTEM
+    INTERFACE
       $<INSTALL_INTERFACE:include>
-      $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
-    PRIVATE
-      src
   )
 
-  # C++17 is used. We require fold expression at least.
+  target_include_directories(${library}
+    PRIVATE
+      $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src>
+      $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  )
+
   target_compile_features(${library} PUBLIC cxx_std_17)
 
   # Force Microsoft Visual Studio to decode sources files in UTF-8. This applies
@@ -22,8 +54,10 @@ function(ftxui_set_options library)
   # Add as many warning as possible:
   if (WIN32)
     if (MSVC)
-      target_compile_options(${library} PRIVATE "/W3")
-      target_compile_options(${library} PRIVATE "/WX")
+      if(FTXUI_DEV_WARNINGS)
+        target_compile_options(${library} PRIVATE "/W3")
+        target_compile_options(${library} PRIVATE "/WX")
+      endif()
       target_compile_options(${library} PRIVATE "/wd4244")
       target_compile_options(${library} PRIVATE "/wd4267")
       target_compile_options(${library} PRIVATE "/D_CRT_SECURE_NO_WARNINGS")
@@ -31,13 +65,21 @@ function(ftxui_set_options library)
     # Force Win32 to UNICODE
     target_compile_definitions(${library} PRIVATE UNICODE _UNICODE)
   else()
-    target_compile_options(${library} PRIVATE "-Wall")
-    target_compile_options(${library} PRIVATE "-Wextra")
-    target_compile_options(${library} PRIVATE "-pedantic")
-    target_compile_options(${library} PRIVATE "-Werror")
-    target_compile_options(${library} PRIVATE "-Wmissing-declarations")
-    target_compile_options(${library} PRIVATE "-Wdeprecated")
-    target_compile_options(${library} PRIVATE "-Wshadow")
+    if(FTXUI_DEV_WARNINGS)
+      target_compile_options(${library} PRIVATE "-Wall")
+      target_compile_options(${library} PRIVATE "-Werror")
+      target_compile_options(${library} PRIVATE "-Wextra")
+  
+      target_compile_options(${library} PRIVATE "-Wcast-align")
+      target_compile_options(${library} PRIVATE "-Wdeprecated")
+      target_compile_options(${library} PRIVATE "-Wmissing-declarations")
+      target_compile_options(${library} PRIVATE "-Wnon-virtual-dtor")
+      target_compile_options(${library} PRIVATE "-Wnull-dereference")
+      target_compile_options(${library} PRIVATE "-Woverloaded-virtual")
+      target_compile_options(${library} PRIVATE "-Wpedantic")
+      target_compile_options(${library} PRIVATE "-Wshadow")
+      target_compile_options(${library} PRIVATE "-Wunused")
+    endif()
   endif()
 
   if (FTXUI_MICROSOFT_TERMINAL_FALLBACK)
@@ -47,9 +89,7 @@ function(ftxui_set_options library)
 endfunction()
 
 if (EMSCRIPTEN)
-  #string(APPEND CMAKE_CXX_FLAGS " -s ASSERTIONS=1")
   string(APPEND CMAKE_CXX_FLAGS " -s USE_PTHREADS")
   string(APPEND CMAKE_EXE_LINKER_FLAGS " -s ASYNCIFY")
   string(APPEND CMAKE_EXE_LINKER_FLAGS " -s PROXY_TO_PTHREAD")
 endif()
-

cmake/ftxui_test.cmake

@@ -1,56 +1,70 @@
-enable_testing()
-set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
-
-set(FETCHCONTENT_UPDATES_DISCONNECTED TRUE)
-include(FetchContent)
-
-FetchContent_Declare(googletest
-  GIT_REPOSITORY "https://github.com/google/googletest"
-  GIT_TAG        23ef29555ef4789f555f1ba8c51b4c52975f0907
-)
-FetchContent_GetProperties(googletest)
-if(NOT googletest_POPULATED)
-  FetchContent_Populate(googletest)
-  add_subdirectory(${googletest_SOURCE_DIR} ${googletest_BINARY_DIR} EXCLUDE_FROM_ALL)
+if (NOT FTXUI_BUILD_TESTS)
+  return()
 endif()
 
-add_executable(tests
+enable_testing()
+
+include(cmake/ftxui_find_google_test.cmake)
+
+add_executable(ftxui-tests
+  src/ftxui/component/animation_test.cpp
+  src/ftxui/component/button_test.cpp
+  src/ftxui/component/collapsible_test.cpp
+  src/ftxui/component/component_test.cpp
   src/ftxui/component/component_test.cpp
   src/ftxui/component/container_test.cpp
+  src/ftxui/component/hoverable_test.cpp
   src/ftxui/component/input_test.cpp
   src/ftxui/component/menu_test.cpp
+  src/ftxui/component/modal_test.cpp
   src/ftxui/component/radiobox_test.cpp
   src/ftxui/component/receiver_test.cpp
+  src/ftxui/component/resizable_split_test.cpp
   src/ftxui/component/screen_interactive_test.cpp
+  src/ftxui/component/slider_test.cpp
   src/ftxui/component/terminal_input_parser_test.cpp
   src/ftxui/component/toggle_test.cpp
+  src/ftxui/dom/blink_test.cpp
+  src/ftxui/dom/bold_test.cpp
+  src/ftxui/dom/border_test.cpp
+  src/ftxui/dom/canvas_test.cpp
+  src/ftxui/dom/color_test.cpp
+  src/ftxui/dom/dbox_test.cpp
+  src/ftxui/dom/dim_test.cpp
   src/ftxui/dom/flexbox_helper_test.cpp
   src/ftxui/dom/flexbox_test.cpp
   src/ftxui/dom/gauge_test.cpp
   src/ftxui/dom/gridbox_test.cpp
   src/ftxui/dom/hbox_test.cpp
+  src/ftxui/dom/hyperlink_test.cpp
+  src/ftxui/dom/linear_gradient_test.cpp
+  src/ftxui/dom/scroll_indicator_test.cpp
+  src/ftxui/dom/separator_test.cpp
+  src/ftxui/dom/spinner_test.cpp
   src/ftxui/dom/table_test.cpp
   src/ftxui/dom/text_test.cpp
+  src/ftxui/dom/underlined_test.cpp
   src/ftxui/dom/vbox_test.cpp
+  src/ftxui/screen/color_test.cpp
   src/ftxui/screen/string_test.cpp
 )
 
-target_link_libraries(tests
+target_link_libraries(ftxui-tests
   PRIVATE component
-  PRIVATE gtest
-  PRIVATE gmock
-  PRIVATE gtest_main
+  PRIVATE GTest::gtest
+  PRIVATE GTest::gtest_main
 )
-target_include_directories(tests
+target_include_directories(ftxui-tests
   PRIVATE src
 )
-target_compile_options(tests PRIVATE -fsanitize=address)
-target_link_libraries(tests PRIVATE -fsanitize=address)
+target_compile_features(ftxui-tests PRIVATE cxx_std_20)
 
-if (NOT MSVC)
-  include(cmake/ftxui_benchmark.cmake)
+if (FTXUI_MICROSOFT_TERMINAL_FALLBACK)
+  target_compile_definitions(ftxui-tests
+    PRIVATE "FTXUI_MICROSOFT_TERMINAL_FALLBACK")
 endif()
 
-if (FTXUI_BUILD_TESTS_FUZZER)
-  include(cmake/ftxui_fuzzer.cmake)
-endif()
+include(GoogleTest)
+gtest_discover_tests(ftxui-tests
+  DISCOVERY_TIMEOUT 600
+)

cmake/iwyu.cmake

@@ -1,7 +1,7 @@
 find_program(iwyu_path NAMES include-what-you-use iwyu)
 if(iwyu_path)
   set_property(TARGET ${lib}
-    PROPERTY ${iwyu_path} -Xiwyu
-      --mapping_file ${CMAKE_CURRENT_SOURCE_DIR}/iwyu.impl
+    PROPERTY "${iwyu_path}" -Xiwyu
+      --mapping_file "${CMAKE_CURRENT_SOURCE_DIR}/iwyu.imp"
   )
 endif()

codecov.yml

@@ -0,0 +1,12 @@
+codecov:
+  require_ci_to_pass: no
+  notify:
+    after_n_builds: 4
+    wait_for_ci: yes
+
+coverage:
+  precision: 2
+  round: down
+  range: "50...100"
+
+comment: false

doc/CMakeLists.txt

@@ -1,22 +1,27 @@
+if(NOT FTXUI_BUILD_DOCS)
+  return()
+endif()
+
 find_package(Doxygen)
-if (DOXYGEN_FOUND)
-  # Generate example list for documentation
-  set(EXAMPLE_LIST "${CMAKE_CURRENT_BINARY_DIR}/example_list.md")
-  file(WRITE ${EXAMPLE_LIST} "# Examples")
-  get_property(EXAMPLES GLOBAL PROPERTY FTXUI::EXAMPLES)
-  foreach(EXAMPLE IN LISTS EXAMPLES)
-    file(APPEND ${EXAMPLE_LIST} "\n@example examples/${EXAMPLE}.cpp")
-  endforeach(EXAMPLE IN LISTS EXAMPLES)
-
-  configure_file(Doxyfile.in Doxyfile @ONLY)
-
-  # note the option ALL which allows to build the docs together with the application
-  add_custom_target(doc
-    COMMAND ${DOXYGEN_EXECUTABLE} ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile
-    WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
-    COMMENT "Generating API documentation with Doxygen"
-    VERBATIM
-    )
-else (DOXYGEN_FOUND)
+if (NOT DOXYGEN_FOUND)
   message("Doxygen need to be installed to generate the doxygen documentation")
-endif (DOXYGEN_FOUND)
+  return()
+endif()
+
+# Generate example list for documentation
+set(EXAMPLE_LIST "${CMAKE_CURRENT_BINARY_DIR}/example_list.md")
+file(WRITE ${EXAMPLE_LIST} "# Examples")
+get_property(EXAMPLES GLOBAL PROPERTY FTXUI::EXAMPLES)
+foreach(EXAMPLE IN LISTS EXAMPLES)
+  file(APPEND ${EXAMPLE_LIST} "\n@example examples/${EXAMPLE}.cpp")
+endforeach(EXAMPLE IN LISTS EXAMPLES)
+
+configure_file(Doxyfile.in Doxyfile @ONLY)
+
+# note the option ALL which allows to build the docs together with the application
+add_custom_target(doc
+  COMMAND ${DOXYGEN_EXECUTABLE} ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile
+  WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
+  COMMENT "Generating API documentation with Doxygen"
+  VERBATIM
+  )

doc/doxygen_extra.css

@@ -178,11 +178,12 @@ div.headertitle {
 }
 
 div.fragment {
-  padding: 16px;
   background-color: #f3f3f3;
-  border: 0 solid;
-  transition: all 0.5s ease-in-out;
   border-radius:5px;
+  border: 0 solid;
+  border: none;
+  padding:16px;
+  transition: all 0.5s ease-in-out;
 }
 
 div.fragment:hover {
@@ -192,8 +193,9 @@ div.fragment:hover {
 
 div.line {
   font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
-  font-size: 85%;
-  line-height: 1.45;
+  font-size: 90%;
+  font-variant-numeric: tabular-nums lining-nums;
+  font-kerning: none;
   -webkit-transition-duration: 0;
   -moz-transition-duration: 0;
   -ms-transition-duration: 0;
@@ -206,15 +208,6 @@ div.line.glow {
   box-shadow: none;
 }
 
-pre.fragment {
-  border: 0 solid #C4CFE5;
-  padding: 16px;
-  background-color: #f3f3f3;
-  font-size: 85%;
-  line-height: 1.45;
-  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
-}
-
 /* @group Code Colorization */
 span.keyword {
   color: #808000

doc/mainpage.md

@@ -1,14 +1,19 @@
 \mainpage
 
-# Introduction
+# Introduction {#introduction}
 
-Welcome to the FTXUI documentation. Here, you will find the detail of every
-functions and classes.
+Welcome to the FTXUI documentation!
+
+This is a brief tutorial. You are also encouraged to self-learn by reading the
+[examples](./examples.html).
 
 @tableofcontents 
 
 **Short example**
 
+To build a single frame, you need create an `ftxui::Element`, and display it on
+a `ftxui::Screen`.
+
 **main.cpp**
 ```cpp
 #include <ftxui/dom/elements.hpp>
@@ -37,19 +42,22 @@ int main(void) {
 }
 ```
 
+
 **output**
 ```bash
-┌────┐┌─────────────────────────────────────────────────────────────────┐┌─────┐
-│left││middle                                                           ││right│
-└────┘└─────────────────────────────────────────────────────────────────┘└─────┘
+┌────┐┌────────────────────────────────────┐┌─────┐
+│left││middle                              ││right│
+└────┘└────────────────────────────────────┘└─────┘
 ```
 
-# Build
+# Build {#build}
 
-## Using CMake
+## Using CMake {#build-cmake}
+
+This is an example configuration for your **CMakeLists.txt**
 
 CMakeLists.txt
-~~~cmake
+```cmake
 cmake_minimum_required (VERSION 3.11)
 
 # --- Fetch FTXUI --------------------------------------------------------------
@@ -58,7 +66,7 @@ include(FetchContent)
 set(FETCHCONTENT_UPDATES_DISCONNECTED TRUE)
 FetchContent_Declare(ftxui
   GIT_REPOSITORY https://github.com/ArthurSonzogni/ftxui
-  # Specify a GIT_TAG here.
+  # Important: Specify a GIT_TAG XXXXX here.
 )
 
 FetchContent_GetProperties(ftxui)
@@ -83,38 +91,43 @@ target_link_libraries(ftxui-starter
   PRIVATE ftxui::component # Not needed for this example.
 )
 
-~~~
+```
 
-Build
-~~~
+Subsequently, you build the project in the standard fashion as follows:
+```bash
 mkdir build && cd build
 cmake ..
 make
 ./main
-~~~
+```
 
-# List of modules.
+# List of modules. {#modules}
 
-The project is split into 3 modules:
+The project is comprised of 3 modules:
 
-1. **ftxui/screen** defines a `ftxui::Screen`, this is a grid of `ftxui::Pixel`.
+1. **ftxui/screen** defines a `ftxui::Screen`, a grid of `ftxui::Pixel`.
 
 2. **ftxui/dom** is the main module. It defines a hierarchical set of
    `ftxui::Element`.  An element draws something on the `ftxui::Screen`. It is
    responsive to the size of its container.
 
-3. **ftxui/component** The part is only needed if you need to respond to the
-   User input. It defines a set of `ftxui::Component`.  The use can navigates
+3. **ftxui/component** The module is required if your program needs to respond
+   to user input. It defines a set of `ftxui::Component`. These components can
+   be utilized to navigate the program by using the arrow keys and interacting
+   with widgets such as the checkbox. You can also make you own components.
+   The use can navigates
    using the arrow keys and interact with widgets like checkbox/inputbox/... You
    can make you own components.
 
-# screen
+# screen {#module-screen}
 
-It defines a `ftxui::Screen`. This is a grid of `ftxui::Pixel`. A Pixel
-represent a Unicode character and its associated style (bold, colors, etc...).
-The screen can be printed as a string using `ftxui::Screen::ToString()`.
+This is the visual element of the program. It defines a `ftxui::Screen`, which
+is a grid of `ftxui::Pixel`. A Pixel represents a Unicode character and its
+associated style (bold, colors, etc.). The screen can be printed as a string
+using `ftxui::Screen::ToString()`. The following example highlights this
+process:
 
-~~~cpp
+```cpp
   #include <ftxui/screen/screen.hpp>
   #include <iostream>
 
@@ -130,75 +143,154 @@ The screen can be printed as a string using `ftxui::Screen::ToString()`.
     std::cout << screen.ToString();
     return EXIT_SUCCESS;
   }
-~~~
+```
 
-# dom
+# dom {#module-dom}
 
-This module defines a hierarchical set of Element. An element manages layout and
-can be responsive to the terminal dimensions.
+This module defines a hierarchical set of `ftxui::Element`. An element manages
+the layout and can be responsive to the terminal dimension changes. Note the
+following example where this module is used to create a simple layout with a
+number of operators:
 
 **Example:**
 ```cpp
 // Define the document
 Element document = vbox({
-    text("The window") | bold | color(Color::Blue),
-    gauge(0.5)
-    text("The footer")
-  });
+  text("The window") | bold | color(Color::Blue),
+  gauge(0.5)
+  text("The footer")
+});
 
-// Add a border.
+// Add a border, by calling the `ftxui::border` decorator function.
 document = border(document);
+
+// Add another border, using the pipe operator.
+document = document | border.
+
+// Add another border, using the |= operator.
+document |= border
+
 ```
 
 **List of elements**
 
-You only need one header: ftxui/dom/elements.hpp
+The list of all elements are included and can be accessed by including the
+corresponding header file:
+```cpp
+#include <ftxui/dom/elements.hpp>
+```
 
 \include ftxui/dom/elements.hpp
 
-## text
+## text ## {#dom-text}
 
 The most simple widget. It displays a text.
-~~~cpp
+```cpp
 text("I am a piece of text");
-~~~
-~~~bash
+```
+```bash
 I am a piece of text.
-~~~
+```
 
-## border
+## vtext {#dom-vtext}
 
-Add a border around an element
-~~~cpp
+Identical to `ftxui::text`, but displayed vertically.
+
+Code:
+```cpp
+vtext("HELLO");
+```
+
+Terminal output:
+```bash
+H
+E
+L
+L
+O
+```
+
+## paragraph {#dom-paragraph}
+
+Similar to `ftxui::text`, but the individual word are wrapped along multiple
+lines, depending on the width of its container.
+
+Sample Code:
+```cpp
+paragraph("A very long text")
+```
+
+![ezgif com-gif-maker (4)](https://user-images.githubusercontent.com/4759106/147251370-983a06e7-6f41-4113-92b8-942f43d34d06.gif)
+
+For a more detailed example refer to [detailed example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2paragraph_8cpp-example.html). Paragraph also includes a number of other variants as shown below:
+```cpp
+Element paragraph(std::string text);
+Element paragraphAlignLeft(std::string text);
+Element paragraphAlignRight(std::string text);
+Element paragraphAlignCenter(std::string text);
+Element paragraphAlignJustify(std::string text);
+```
+
+
+## border {#dom-border}
+
+Adds a border around an element.
+
+Code:
+```cpp
 border(text("The element"))
-~~~
+```
 
-~~~bash
+Terminal output:
+```bash
 ┌───────────┐
 │The element│
 └───────────┘
-~~~
+```
 
-## window
+You can achieve the same behavior by using the pipe operator.
 
-A `ftxui::window` is a `ftxui::border`, but with some text on top of the border.
-Add a border around an element
-~~~cpp
+Code:
+```cpp
+text("The element") | border
+```
+
+Border also comes in a variety of styles as shown below:
+```cpp
+Element border(Element);
+Element borderLight(Element);
+Element borderHeavy(Element);
+Element borderDouble(Element);
+Element borderRounded(Element);
+Element borderEmpty(Element);
+Decorator borderStyled(BorderStyle);
+Decorator borderWith(Pixel);
+```
+
+
+## window ## {#dom-window}
+
+A `ftxui::window` is a `ftxui::border`, but with an additional header. To add a
+window around an element, wrap it and specify a string as the header.
+Code:
+```cpp
 window("The window", text("The element"))
-~~~
+```
 
-~~~bash
+Terminal output:
+```bash
 ┌The window─┐
 │The element│
 └───────────┘
-~~~
+```
 
-## separator
+## separator {#dom-separator}
 
-Display a vertical or horizontal line to visually split the content of a
+Displays a vertical/horizontal line to visually split the content of a
 container in two.
 
-~~~cpp
+Code:
+```cpp
 border(
   hbox({
     text("Left"), 
@@ -206,44 +298,89 @@ border(
     text("Right")
   })
 )
-~~~
+```
 
-~~~bash
+Terminal output:
+```bash
 ┌────┬─────┐
 │left│right│
 └────┴─────┘
-~~~
+```
 
-## gauge
 
-A gauge. It can be used to represent a progress bar.
-~~~cpp
+Separators come in a variety of flavors as shown below:
+```cpp
+Element separator(void);
+Element separatorLight();
+Element separatorHeavy();
+Element separatorDouble();
+Element separatorEmpty();
+Element separatorStyled(BorderStyle);
+Element separator(Pixel);
+Element separatorCharacter(std::string);
+Element separatorHSelector(float left,
+                           float right,
+                           Color background,
+                           Color foreground);
+Element separatorVSelector(float up,
+                           float down,
+                           Color background,
+                           Color foreground);
+```
+
+## gauge {#dom-gauge}
+
+It constitutes a gauge. It can be used to represent a progress bar.
+
+Code:
+```cpp
 border(gauge(0.5))
-~~~
+```
 
-~~~bash
+Teminal output:
+```bash
 ┌────────────────────────────────────────────────────────────────────────────┐
 │██████████████████████████████████████                                      │
 └────────────────────────────────────────────────────────────────────────────┘
-~~~
+```
 
-## graph
+Gauges can be displayed in many orientations as shown below:
+```cpp
+Element gauge(float ratio);
+Element gaugeLeft(float ratio);
+Element gaugeRight(float ratio);
+Element gaugeUp(float ratio);
+Element gaugeDown(float ratio);
+Element gaugeDirection(float ratio, GaugeDirection);
+```
+
+## graph {#dom-graph}
 
 @htmlonly
 <script id="asciicast-223726" src="https://asciinema.org/a/223726.js" async></script>
 @endhtmlonly
 
-## Colors
-A terminal console can usually display colored text and colored background.
+See:
+```cpp
+Element graph(GraphFunction);
+```
 
-~~~cpp
+## Colors {#dom-colors}
+
+Most terminal consoles can display colored text and colored backgrounds. FTXUI
+supports every color palette:
+```cpp
 Decorator color(Color);
 Decorator bgcolor(Color);
-~~~
+```
 
-### Palette16
 
-On most terminal the following colors are supported:
+Color [gallery](https://arthursonzogni.github.io/FTXUI/examples_2dom_2color_gallery_8cpp-example.html):
+![image](https://user-images.githubusercontent.com/4759106/147248595-04c7245a-5b85-4544-809d-a5984fc6f9e7.png)
+
+### Palette16 #{#dom-colors-palette-16}
+
+On most terminals the following colors are supported:
 - Default
 
 - Black
@@ -270,14 +407,14 @@ On most terminal the following colors are supported:
 - Yellow
 - YellowLight
 
-Example:
+Example use of the above colors using the pipe operator:
 ```cpp
 text("Blue foreground") | color(Color::Blue);
 text("Blue background") | bgcolor(Color::Blue);
 text("Black on white") | color(Color::Black) | bgcolor(Color::White);
 ```
 
-### Palette256
+### Palette256 #{#dom-colors-palette-256}
 
 On terminal supporting 256 colors. 
 @htmlonly
@@ -288,9 +425,13 @@ On terminal supporting 256 colors.
 text("HotPink") | color(Color::HotPink);
 ```
 
-### TrueColor
+### TrueColor #{#dom-colors-true-color}
 
-On terminal supporting trueColor, you can directly chose the 24bit RGB color:
+On terminal supporting trueColor, you can directly use the 24bit RGB color
+space:
+
+Use the constructors below to specify the **RGB** or **HSV** values for your
+color:
 
 There are two constructors:
 ```cpp
@@ -303,100 +444,190 @@ ftxui::Color::HSV(uint8_t hue, uint8_t saturation, uint8_t value);
 <script id="asciicast-xwzzghmqcqzIuyLwCpQFEqbEu" src="https://asciinema.org/a/xwzzghmqcqzIuyLwCpQFEqbEu.js" async></script>
 @endhtmlonly
 
-## Style
-A terminal console can usually display colored text and colored background.
-The text can also have different effects: bold, dim, underlined, inverted,
-blink.
+## LinearGradient #{#dom-linear-gradient}
 
-~~~cpp
+FTXUI supports linear gradient. Either on the foreground or the background.
+
+```cpp
+Decorator color(const LinearGradient&);
+Decorator bgcolor(const LinearGradient&);
+```
+
+A `ftxui::LinearGradient` is defined by an angle in degree, and a list of color
+stops.
+```cpp
+auto gradient = LinearGradient()
+  .Angle(45)
+  .AddStop(0.0, Color::Red)
+  .AddStop(0.5, Color::Green)
+  .AddStop(1.0, Color::Blue);
+```
+
+You can also use simplified constructors:
+```cpp
+LinearGradient(Color::Red, Color::Blue);
+```
+```cpp
+LinearGradient(45, Color::Red, Color::Blue);
+```
+
+See [demo](https://arthursonzogni.github.io/FTXUI/examples/?file=component/linear_gradient_gallery).
+
+
+## Style {#dom-style}
+In addition to colored text and colored backgrounds. Many terminals support text
+effects such as: `bold`, `dim`, `underlined`, `inverted`, `blink`.
+
+```cpp
 Element bold(Element);
 Element dim(Element);
 Element inverted(Element);
 Element underlined(Element);
+Element underlinedDouble(Element);
+Element strikethrough(Element);
 Element blink(Element);
 Decorator color(Color);
 Decorator bgcolor(Color);
-~~~
+Decorator colorgrad(LinearGradient);
+Decorator bgcolorgrad(LinearGradient);
+```
 
-Example:
-~~~cpp
+[Example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2style_gallery_8cpp-example.html)
+
+![image](https://user-images.githubusercontent.com/4759106/147244118-380bf834-9e33-40df-9ff0-07c10f2598ef.png)
+
+To use these effects, simply wrap your elements with your desired effect:
+```cpp
 underlined(bold(text("This text is bold and underlined")))
-~~~
+```
 
-Tips: The pipe operator can be used to chain Decorator:
-~~~cpp
-text("This text is bold")) | bold | underlined
-~~~
+Alternatively, use the pipe operator to chain it on your element:
+```cpp
+text("This text is bold") | bold | underlined
+```
 
-## Layout
+## Layout {#dom-layout}
 
-These layout are similar to the HTML flexbox:
-* vbox (Vertical-box)
-* hbox (Horizontal-box)
-* dbox (Z-axis-box)
-They are used to compose all the elements together. Each
-children are put side by side. If the container is flexible, the extra space
-available will be shared among the remaining flexible children.
+Enables elements to be arranged in the following ways:
+  - **Horizontally** with `ftxui::hbox`
+  - **Vertically** with `ftxui::vbox`
+  - **Inside a grid** with `ftxui::gridbox`
+  - **Wrapped along one direction** using the `ftxui::flexbox`.
+  
+[Example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2vbox_hbox_8cpp-example.html) using `ftxui::hbox`, `ftxui::vbox` and `ftxui::filler`.
 
-`flex(element)` can be used to make a non-flexible element flexible. `filler()`
-is a flexible empty element. You can use it align children on one side of the
-container.
+![image](https://user-images.githubusercontent.com/4759106/147242524-7103b5d9-1a92-4e2d-ac70-b3d6740061e3.png)
+  
+  
+[Example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2gridbox_8cpp-example.htmlp)
+using `ftxui::gridbox`:
 
-An horizontal flow layout is implemented by:
-* hflow (Horizontal flow)
+![image](https://user-images.githubusercontent.com/4759106/147242972-0db1f2e9-0790-496f-86e6-ed2c604f7a73.png)
 
-**Examples**
-~~~cpp
+[Example](https://github.com/ArthurSonzogni/FTXUI/blob/master/examples/dom/hflow.cpp)
+using flexbox:
+
+![image](https://user-images.githubusercontent.com/4759106/147243064-780ac7cc-605b-475f-94b8-cf7c4aed03a5.png)
+
+Checkout this
+[example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2hflow_8cpp-example.html)
+and the associated
+[demo](https://arthursonzogni.github.io/FTXUI/examples/?file=component/flexbox).
+
+Element can also become flexible using the the `ftxui::flex` decorator.
+
+Code:
+```cpp
   hbox({
     text("left") | border ,
     text("middle") | border | flex,
     text("right") | border,
   });
-~~~
-~~~bash
-┌────┐┌─────────────────────────────────────────────────────────────────┐┌─────┐
-│left││middle                                                           ││right│
-└────┘└─────────────────────────────────────────────────────────────────┘└─────┘
-~~~
+```
+Terminal output:
+```bash
+┌────┐┌─────────────────────────────────────────────────────┐┌─────┐
+│left││middle                                               ││right│
+└────┘└─────────────────────────────────────────────────────┘└─────┘
+```
 
-~~~cpp
+Code:
+```cpp
   hbox({
     text("left") | border ,
     text("middle") | border | flex,
     text("right") | border | flex,
   });
-~~~
-~~~bash
-┌────┐┌───────────────────────────────────┐┌───────────────────────────────────┐
-│left││middle                             ││right                              │
-└────┘└───────────────────────────────────┘└───────────────────────────────────┘
-~~~
+```
 
+Terminal output:
+```bash
+┌────┐┌───────────────────────────────┐┌───────────────────────────────┐
+│left││middle                         ││right                          │
+└────┘└───────────────────────────────┘└───────────────────────────────┘
+```
 
-# component
+## Table {#dom-table}
 
-The `ftxui/component` directory defines the logic to get produce
-interactive component responding to user's events (keyboard, mouse, etc...)
+Enables easy formatting of data into a neat table like visual form.
 
-A `ftxui::ScreenInteractive` defines a main loop to render a component.
+[Code example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2table_8cpp-example.html):
+  
+![image](https://user-images.githubusercontent.com/4759106/147250766-77d8ec9e-cf2b-486d-9866-1fd9f1bd2e6b.png)
 
-A `ftxui::Component` is a shared pointer to a `ftxui::ComponentBase`. The later
-defines
+## Canvas {#dom-canvas}
+
+See the API [<ftxui/dom/canvas.hpp>](./canvas_8hpp_source.html)
+
+```cpp
+  auto c = Canvas(100, 100);
+  c.DrawPointLine(10, 10, 80, 10, Color::Red);
+  auto element = canvas(c);
+```
+
+Drawing can be performed on a `ftxui::Canvas`, using braille, block, or simple
+characters:
+  
+Simple [example](https://github.com/ArthurSonzogni/FTXUI/blob/master/examples/dom/canvas.cpp):
+  
+![image](https://user-images.githubusercontent.com/4759106/147245843-76cc62fb-ccb4-421b-aacf-939f9afb42fe.png)
+
+Complex [example](https://github.com/ArthurSonzogni/FTXUI/blob/master/examples/component/canvas_animated.cpp):
+  
+![ezgif com-gif-maker (3)](https://user-images.githubusercontent.com/4759106/147250538-783a8246-98e0-4a25-b032-3bd3710549d1.gif)
+# component {#module-component}
+
+The `ftxui::component` module defines the logic that produces interactive
+components that respond to user events (keyboard, mouse, etc.).
+
+A `ftxui::ScreenInteractive` defines a main loop that renders a component.
+
+A `ftxui::Component` is a shared pointer to a `ftxui::ComponentBase`. The latter defines:
   - `ftxui::ComponentBase::Render()`: How to render the interface.
   - `ftxui::ComponentBase::OnEvent()`: How to react to events.
-  - `ftxui::ComponentBase::Add()`: Give a parent/child relation ship in between
-    two component. This defines a tree a components, which help properly define
-    how keyboard navigation works.
+  - `ftxui::ComponentBase::Add()`: Construct a parent/child relationship
+    between two components. The tree of component is used to define how to
+    navigate using the keyboard.
 
-Predefined components are available in `ftxui/dom/component.hpp`:
+`ftxui::Element` are used to render a single frame.
+
+`ftxui::Component` are used to render dynamic user interface, producing multiple
+frame, and updating its state on events.
+
+[Gallery](https://arthursonzogni.github.io/FTXUI/examples_2component_2gallery_8cpp-example.html) of multiple components. ([demo](https://arthursonzogni.github.io/FTXUI/examples/?file=component/gallery))
+
+![image](https://user-images.githubusercontent.com/4759106/147247330-b60beb9f-e665-48b4-81c0-4b01ee95bc66.png)
+
+All predefined components are available in
+["ftxui/dom/component.hpp"](./component_8hpp.html)
 
 \include ftxui/component/component.hpp
 
-Element are stateless object. On the other side, components are used when an
-internal state is needed. Components are used to interact with the user with
-its keyboard. They handle keyboard navigation, including component focus.
+## Input {#component-input}
 
-## Input
+[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2input_8cpp-example.html):
+
+![image](https://user-images.githubusercontent.com/4759106/147247671-f1d6f606-1845-4e94-a4a0-d4273e9ae6bd.png)
 
 Produced by: `ftxui::Input()` from "ftxui/component/component.hpp"
 
@@ -404,7 +635,14 @@ Produced by: `ftxui::Input()` from "ftxui/component/component.hpp"
 <script id="asciicast-223719" src="https://asciinema.org/a/223719.js" async></script>
 @endhtmlonly
 
-## Menu
+## Menu {#component-menu}
+
+Defines a menu object. It contains a list of entries, one of them is selected.
+
+[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2menu_8cpp-example.html):
+
+![image](https://user-images.githubusercontent.com/4759106/147247822-0035fd6f-bb13-4b3a-b057-77eb9291582f.png)
+
 
 Produced by: `ftxui::Menu()` from "ftxui/component/component.hpp"
 
@@ -412,7 +650,13 @@ Produced by: `ftxui::Menu()` from "ftxui/component/component.hpp"
 <script id="asciicast-223720" src="https://asciinema.org/a/223720.js" async></script>
 @endhtmlonly
 
-## Toggle.
+## Toggle {#component-toggle}
+
+A special kind of menu. The entries are displayed horizontally.
+
+[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2toggle_8cpp-example.html):
+
+![image](https://user-images.githubusercontent.com/4759106/147249383-e2201cf1-b7b8-4a5a-916f-d761e3e7ae40.png)
 
 Produced by: `ftxui::Toggle()` from "ftxui/component/component.hpp"
 
@@ -420,7 +664,14 @@ Produced by: `ftxui::Toggle()` from "ftxui/component/component.hpp"
 <script id="asciicast-223722" src="https://asciinema.org/a/223722.js" async></script>
 @endhtmlonly
 
-## CheckBox
+## CheckBox {#component-checkbox}
+
+This component defines a checkbox. It is a single entry that can be turned
+on/off.
+
+[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2checkbox_8cpp-example.html):
+
+![image](https://user-images.githubusercontent.com/4759106/147246646-b86926a9-1ef9-4efb-af98-48a9b62acd81.png)
 
 Produced by: `ftxui::Checkbox()` from "ftxui/component/component.hpp"
 
@@ -428,7 +679,13 @@ Produced by: `ftxui::Checkbox()` from "ftxui/component/component.hpp"
 <script id="asciicast-223724" src="https://asciinema.org/a/223724.js" async></script>
 @endhtmlonly
 
-## RadioBox
+## RadioBox {#component-radiobox}
+
+A radiobutton component. This is a list of entries, where one can be turned on.
+
+[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2radiobox_8cpp-example.html):
+  
+![image](https://user-images.githubusercontent.com/4759106/147246401-809d14a5-6621-4e36-8dd9-a2d75ef2a94e.png)
 
 Produced by: `ftxui::Radiobox()` from "ftxui/component/component.hpp"
 
@@ -436,65 +693,182 @@ Produced by: `ftxui::Radiobox()` from "ftxui/component/component.hpp"
 <script id="asciicast-223725" src="https://asciinema.org/a/223725.js" async></script>
 @endhtmlonly
 
-## Renderer
+## Dropdown {#component-dropdown}
 
-Produced by: `ftxui::Renderer()` from \ref "ftxui/component/component.hpp". This
+A drop down menu is a component that when checked display a list of element for
+the user to select one.
+
+[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2dropdown_8cpp-example.html):
+
+![youtube-video-gif (3)](https://user-images.githubusercontent.com/4759106/147246982-1e821751-531c-4e1f-bc37-2fa290e143cd.gif)
+
+Produced by: `ftxui::Dropdown()` from "ftxui/component/component.hpp"
+
+## Slider {#component-slider}
+
+Represents a slider object that consists of a range with binned intermediate
+intervals. It can be created by `ftxui::Slider()`.
+
+[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2slider_8cpp-example.html):
+
+![image](https://user-images.githubusercontent.com/4759106/147249265-7e2cad75-082c-436e-affe-44a550c480ab.png)
+
+Produced by: `ftxui::Slider()` from "ftxui/component/component.hpp"
+
+## Renderer {#component-renderer}
+
+Produced by: `ftxui::Renderer()` from \ref ftxui/component/component.hpp. This
 component decorate another one by using a different function to render an
 interface.
 
-## CatchEvent 
+Example:
+```cpp
+auto inner = [...]
 
-Produced by: `ftxui::CatchEvent()` from \ref "ftxui/component/component.hpp".
-This component decorate another one and catch the events before the underlying
-component.
+auto renderer = Renderer(inner, [&] {
+  return inner->Render() | border
+});
+```
 
-## Container::Horizontal 
+`ftxui::Renderer` also supports the component decorator pattern:
+```cpp
+auto component = [...]
+component = component
+  | Renderer([](Element e) { return e | border))
+  | Renderer(bold)
+```
+
+As a short hand, you can also compose a component with an element decorator:
+```cpp
+auto component = [...]
+component = component | border | bold;
+```
+
+## CatchEvent {#component-catchevent}
+
+Produced by: `ftxui::CatchEvent()` from \ref ftxui/component/component.hpp.
+This component decorate others, catching events before the underlying component.
+
+Examples:
+```cpp
+auto screen = ScreenInteractive::TerminalOutput();
+auto renderer = Renderer([] {
+  return text("My interface");
+});
+auto component = CatchEvent(renderer, [&](Event event) {
+  if (event == Event::Character('q')) {
+    screen.ExitLoopClosure()();
+    return true;
+  }
+  return false;
+});
+screen.Loop(component);
+```
+
+The `ftxui::CatchEvent` can also be used as a decorator:
+```cpp
+component = component
+  | CatchEvent(handler_1)
+  | CatchEvent(handler_2)
+  | CatchEvent(handler_3)
+  ;
+```
+
+## Collapsible {#component-collapsible}
+
+Useful for visual elements whose visibility can be toggle on/off by the user.
+Essentially, this the combination of the `ftxui::Checkbox()` and
+`ftxui::Maybe()` components.
+
+```cpp
+auto collabsible = Collapsible("Show more", inner_element);
+```
+
+## Maybe {#component-maybe}
+
+Produced by: `ftxui::Maybe()` from \ref ftxui/component/component.hpp.
+This component can be utilized to show/hide any other component via a boolean or
+a predicate.
+
+Example with a boolean:
+```cpp
+bool show = true;
+auto component = Renderer([]{ return "Hello World!"; });
+auto maybe_component = Maybe(component, &show)
+```
+
+Example with a predicate:
+```cpp
+auto component = Renderer([]{ return "Hello World!"; });
+auto maybe_component = Maybe(component, [&] { return time > 10; })
+```
+
+As usual, `ftxui::Maybe` can also be used as a decorator:
+```cpp
+component = component
+  | Maybe(&a_boolean)
+  | Maybe([&] { return time > 10; })
+  ;
+```
+
+## Container {#component-container}
+
+### Horizontal {#component-horizontal}
 
 Produced by: `ftxui::Container::Horizontal()` from
 "ftxui/component/component.hpp". It displays a list of components horizontally
 and handle keyboard/mouse navigation.
 
-## Container::Vertial
+### Vertical {#component-vertical}
 
 Produced by: `ftxui::Container::Vertical()` from
 "ftxui/component/component.hpp". It displays a list of components vertically 
 and handles keyboard/mouse navigation.
 
-## Container::Tab
+### Tab {#component-tab}
 
 Produced by: `ftxui::Container::Tab()` from
 "ftxui/component/component.hpp". It take a list of component and display only
 one of them. This is useful for implementing a tab bar.
 
-## ResizableSplit::{Left, Right, Top, Bottom} 
+[Vertical](https://arthursonzogni.github.io/FTXUI/examples_2component_2tab_vertical_8cpp-example.html):
+  
+![ezgif com-gif-maker (1)](https://user-images.githubusercontent.com/4759106/147250144-22ff044a-4773-4ff7-a49c-12ba4034acb4.gif)
 
-Produced by:
+[Horizontal](https://arthursonzogni.github.io/FTXUI/examples_2component_2tab_horizontal_8cpp-example.html):
+  
+  ![ezgif com-gif-maker (2)](https://user-images.githubusercontent.com/4759106/147250217-fe447e0f-7a99-4e08-948a-995087d9b40e.gif)
+
+
+## ResizableSplit  {#component-resizable-split}
+
+It defines a horizontal or vertical separation between two children components.
+The position of the split is variable and controllable using the mouse. 
+There are four possible splits:
 - `ftxui::ResizableSplitLeft()`
 - `ftxui::ResizableSplitRight()`
 - `ftxui::ResizableSplitTop()`
 - `ftxui::ResizableSplitBottom()`
 from "ftxui/component/component.hpp"
 
-It defines an horizontal or vertical separation in between two children
-component. The position of the split is variable and controllable using the
-mouse.
+[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2resizable_split_8cpp-example.html):
+
+![ezgif com-gif-maker](https://user-images.githubusercontent.com/4759106/147248372-c55512fe-9b96-4b08-a1df-d05cf2cae431.gif)  
 
 @htmlonly
 <script id="asciicast-tprMH2EdkUoMb7D2YxgMGgpzx" src="https://asciinema.org/a/tprMH2EdkUoMb7D2YxgMGgpzx.js" async></script>
 @endhtmlonly
 
-## Force a frame redraw.
+## Force a frame redraw. {#component-force-redraw}
 
-Whenever a new group of events have been processed: keyboard, mouse, window
-resize, etc..., the `ftxui::ScreenInteractive::Loop()` is responsible for
-drawing a new frame.
-
-You might want to react to arbitrary events that are unknown to FTXUI. This can
-be achieve by posting events via `ftxui::ScreenInteractive::PostEvent`, via a
-thread. You can post the event`ftxui::Event::Custom`.
+Typically, `ftxui::ScreenInteractive::Loop()` is responsible for drawing a new
+frame whenever a new group of events (e.g keyboard, mouse, window resize, etc.)
+has been processed. However, you might want to react to arbitrary events that
+are unknown to FTXUI. To accomplish this, you must post events using
+`ftxui::ScreenInteractive::PostEvent` (**this is thread safe**) via a thread.
+You will have to post the event `ftxui::Event::Custom`.
 
+Example:
 ```cpp
 screen->PostEvent(Event::Custom);
 ```
-
-`ftxui::ScreenInteractive::PostEvent` is thread safe.

examples/CMakeLists.txt

@@ -1,18 +1,30 @@
+if(NOT FTXUI_BUILD_EXAMPLES)
+  return()
+endif()
+
 set(EXAMPLES_DIR ${CMAKE_CURRENT_SOURCE_DIR})
 function(example name)
   add_executable(ftxui_example_${name} ${name}.cpp)
   target_link_libraries(ftxui_example_${name} PUBLIC ${DIRECTORY_LIB})
   file(RELATIVE_PATH dir ${EXAMPLES_DIR} ${CMAKE_CURRENT_SOURCE_DIR})
   set_property(GLOBAL APPEND PROPERTY FTXUI::EXAMPLES ${dir}/${name})
+  target_compile_features(ftxui_example_${name} PRIVATE cxx_std_17)
 endfunction(example)
 
 add_subdirectory(component)
 add_subdirectory(dom)
 
 if (EMSCRIPTEN)
+  # 32MB should be enough to run all the examples, in debug mode.
+  target_link_options(component PUBLIC "SHELL: -s TOTAL_MEMORY=33554432")
+  target_link_options(component PUBLIC "SHELL: -s ASSERTIONS=1")
+  #string(APPEND CMAKE_EXE_LINKER_FLAGS " -s ALLOW_MEMORY_GROWTH=1")
+  #target_link_options(component PUBLIC "SHELL: -s ALLOW_MEMORY_GROWTH=1")
+
   get_property(EXAMPLES GLOBAL PROPERTY FTXUI::EXAMPLES)
   foreach(file
       "index.html"
+      "sw.js"
       "run_webassembly.py")
     configure_file(${file} ${file})
   endforeach(file)

examples/component/CMakeLists.txt

@@ -1,25 +1,34 @@
 set(DIRECTORY_LIB component)
 
 example(button)
+example(button_animated)
+example(button_in_frame)
+example(button_style)
 example(canvas_animated)
 example(checkbox)
 example(checkbox_in_frame)
 example(collapsible)
 example(composition)
+example(custom_loop)
 example(dropdown)
 example(flexbox_gallery)
 example(focus)
+example(focus_cursor)
 example(gallery)
 example(homescreen)
 example(input)
+example(linear_gradient_gallery)
 example(maybe)
 example(menu)
 example(menu2)
 example(menu_entries)
+example(menu_entries_animated)
 example(menu_in_frame)
 example(menu_multiple)
 example(menu_style)
+example(menu_underline_animated_gallery)
 example(modal_dialog)
+example(modal_dialog_custom)
 example(nested_screen)
 example(print_key_press)
 example(radiobox)
@@ -27,6 +36,7 @@ example(radiobox_in_frame)
 example(renderer)
 example(resizable_split)
 example(slider)
+example(slider_direction)
 example(slider_rgb)
 example(tab_horizontal)
 example(tab_vertical)

examples/component/button.cpp

@@ -1,26 +1,21 @@
 #include <memory>  // for shared_ptr, __shared_ptr_access
-#include <string>  // for operator+, to_wstring
+#include <string>  // for operator+, to_string
 
 #include "ftxui/component/captured_mouse.hpp"  // for ftxui
 #include "ftxui/component/component.hpp"  // for Button, Horizontal, Renderer
 #include "ftxui/component/component_base.hpp"      // for ComponentBase
-#include "ftxui/component/component_options.hpp"   // for ButtonOption
 #include "ftxui/component/screen_interactive.hpp"  // for ScreenInteractive
-#include "ftxui/dom/elements.hpp"  // for separator, gauge, Element, operator|, vbox, border
+#include "ftxui/dom/elements.hpp"  // for separator, gauge, text, Element, operator|, vbox, border
 
 using namespace ftxui;
 
-int main(int argc, const char* argv[]) {
+int main() {
   int value = 50;
 
   // The tree of components. This defines how to navigate using the keyboard.
-  auto button_option = ButtonOption();
-  button_option.border = false;
   auto buttons = Container::Horizontal({
-      Button(
-          "[Decrease]", [&] { value--; }, &button_option),
-      Button(
-          "[Increase]", [&] { value++; }, &button_option),
+      Button("Decrease", [&] { value--; }),
+      Button("Increase", [&] { value++; }),
   });
 
   // Modify the way to render them on screen:

examples/component/button_animated.cpp

@@ -0,0 +1,46 @@
+#include <memory>  // for shared_ptr, __shared_ptr_access
+#include <string>  // for operator+, to_string
+
+#include "ftxui/component/captured_mouse.hpp"  // for ftxui
+#include "ftxui/component/component.hpp"  // for Button, Horizontal, Renderer
+#include "ftxui/component/component_base.hpp"      // for ComponentBase
+#include "ftxui/component/component_options.hpp"   // for ButtonOption
+#include "ftxui/component/screen_interactive.hpp"  // for ScreenInteractive
+#include "ftxui/dom/elements.hpp"  // for gauge, separator, text, vbox, operator|, Element, border
+#include "ftxui/screen/color.hpp"  // for Color, Color::Blue, Color::Green, Color::Red
+
+using namespace ftxui;
+
+int main() {
+  int value = 50;
+
+  // The tree of components. This defines how to navigate using the keyboard.
+  auto buttons = Container::Horizontal({
+      Button(
+          "Decrease", [&] { value--; }, ButtonOption::Animated(Color::Red)),
+      Button(
+          "Reset", [&] { value = 50; }, ButtonOption::Animated(Color::Green)),
+      Button(
+          "Increase", [&] { value++; }, ButtonOption::Animated(Color::Blue)),
+  });
+
+  // Modify the way to render them on screen:
+  auto component = Renderer(buttons, [&] {
+    return vbox({
+        vbox({
+            text("value = " + std::to_string(value)),
+            separator(),
+            gauge(value * 0.01f),
+        }) | border,
+        buttons->Render(),
+    });
+  });
+
+  auto screen = ScreenInteractive::FitComponent();
+  screen.Loop(component);
+  return 0;
+}
+
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.

examples/component/button_in_frame.cpp

@@ -0,0 +1,49 @@
+#include <memory>  // for allocator, __shared_ptr_access, shared_ptr
+#include <string>  // for to_string, operator+
+
+#include "ftxui/component/captured_mouse.hpp"  // for ftxui
+#include "ftxui/component/component.hpp"       // for Button, Renderer, Vertical
+#include "ftxui/component/component_base.hpp"  // for ComponentBase
+#include "ftxui/component/component_options.hpp"   // for ButtonOption
+#include "ftxui/component/screen_interactive.hpp"  // for ScreenInteractive
+#include "ftxui/dom/elements.hpp"  // for operator|, text, Element, hbox, separator, size, vbox, border, frame, vscroll_indicator, HEIGHT, LESS_THAN
+#include "ftxui/screen/color.hpp"  // for Color, Color::Default, Color::GrayDark, Color::White
+
+using namespace ftxui;
+
+int main() {
+  int counter = 0;
+  auto on_click = [&] { counter++; };
+
+  auto button_style = ButtonOption::Animated(Color::Default, Color::GrayDark,
+                                             Color::Default, Color::White);
+
+  auto container = Container::Vertical({});
+  for (int i = 0; i < 30; ++i) {
+    auto button =
+        Button("Button " + std::to_string(i), on_click, &button_style);
+    container->Add(button);
+  }
+
+  auto renderer = Renderer(container, [&] {
+    return vbox({
+               hbox({
+                   text("Counter:"),
+                   text(std::to_string(counter)),
+               }),
+               separator(),
+               container->Render() | vscroll_indicator | frame |
+                   size(HEIGHT, LESS_THAN, 20),
+           }) |
+           border;
+  });
+
+  auto screen = ScreenInteractive::FitComponent();
+  screen.Loop(renderer);
+
+  return 0;
+}
+
+// Copyright 2022 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.

examples/component/button_style.cpp

@@ -0,0 +1,61 @@
+#include <string>  // for operator+, to_string
+
+#include "ftxui/component/captured_mouse.hpp"  // for ftxui
+#include "ftxui/component/component.hpp"  // for Button, Vertical, Renderer, Horizontal, operator|
+#include "ftxui/component/component_base.hpp"      // for Component
+#include "ftxui/component/component_options.hpp"   // for ButtonOption
+#include "ftxui/component/screen_interactive.hpp"  // for ScreenInteractive
+#include "ftxui/dom/elements.hpp"  // for Element, separator, text, border
+#include "ftxui/screen/color.hpp"  // for Color, Color::Blue, Color::Green, Color::Red
+
+using namespace ftxui;
+
+int main() {
+  int value = 0;
+  auto action = [&] { value++; };
+  auto action_renderer =
+      Renderer([&] { return text("count = " + std::to_string(value)); });
+
+  auto buttons =
+      Container::Vertical({
+          action_renderer,
+          Renderer([] { return separator(); }),
+          Container::Horizontal({
+              Container::Vertical({
+                  Button("Ascii 1", action, ButtonOption::Ascii()),
+                  Button("Ascii 2", action, ButtonOption::Ascii()),
+                  Button("Ascii 3", action, ButtonOption::Ascii()),
+              }),
+              Renderer([] { return separator(); }),
+              Container::Vertical({
+                  Button("Simple 1", action, ButtonOption::Simple()),
+                  Button("Simple 2", action, ButtonOption::Simple()),
+                  Button("Simple 3", action, ButtonOption::Simple()),
+              }),
+              Renderer([] { return separator(); }),
+              Container::Vertical({
+                  Button("Animated 1", action, ButtonOption::Animated()),
+                  Button("Animated 2", action, ButtonOption::Animated()),
+                  Button("Animated 3", action, ButtonOption::Animated()),
+              }),
+              Renderer([] { return separator(); }),
+              Container::Vertical({
+                  Button("Animated 4", action,
+                         ButtonOption::Animated(Color::Red)),
+                  Button("Animated 5", action,
+                         ButtonOption::Animated(Color::Green)),
+                  Button("Animated 6", action,
+                         ButtonOption::Animated(Color::Blue)),
+              }),
+          }),
+      }) |
+      border;
+
+  auto screen = ScreenInteractive::FitComponent();
+  screen.Loop(buttons);
+  return 0;
+}
+
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.

examples/component/canvas_animated.cpp

@@ -14,7 +14,7 @@
 #include "ftxui/dom/canvas.hpp"                    // for Canvas
 #include "ftxui/screen/color.hpp"  // for Color, Color::Red, Color::Blue, Color::Green, ftxui
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
 
   int mouse_x = 0;
@@ -126,9 +126,9 @@ int main(int argc, const char* argv[]) {
 
     std::vector<int> ys(100);
     for (int x = 0; x < 100; x++) {
-      float dx = x - mouse_x;
-      float dy = 50;
-      ys[x] = dy + 20 * cos(dx * 0.14) + 10 * sin(dx * 0.42);
+      float dx = float(x - mouse_x);
+      float dy = 50.f;
+      ys[x] = int(dy + 20 * cos(dx * 0.14) + 10 * sin(dx * 0.42));
     }
     for (int x = 1; x < 99; x++)
       c.DrawPointLine(x, ys[x], x + 1, ys[x + 1]);
@@ -141,10 +141,10 @@ int main(int argc, const char* argv[]) {
     c.DrawText(0, 0, "A symmetrical graph filled");
     std::vector<int> ys(100);
     for (int x = 0; x < 100; x++) {
-      ys[x] = 30 +                                  //
-              10 * cos(x * 0.2 - mouse_x * 0.05) +  //
-              5 * sin(x * 0.4) +                    //
-              5 * sin(x * 0.3 - mouse_y * 0.05);    //
+      ys[x] = int(30 +                                  //
+                  10 * cos(x * 0.2 - mouse_x * 0.05) +  //
+                  5 * sin(x * 0.4) +                    //
+                  5 * sin(x * 0.3 - mouse_y * 0.05));   //
     }
     for (int x = 0; x < 100; x++) {
       c.DrawPointLine(x, 50 + ys[x], x, 50 - ys[x], Color::Red);

examples/component/checkbox.cpp

@@ -8,12 +8,12 @@
 #include "ftxui/component/screen_interactive.hpp"  // for Component, ScreenInteractive
 #include "ftxui/dom/elements.hpp"  // for operator|, Element, size, border, frame, vscroll_indicator, HEIGHT, LESS_THAN
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
 
   Component input_list = Container::Vertical({});
   std::vector<std::string> items(100, "");
-  for (int i = 0; i < items.size(); ++i) {
+  for (size_t i = 0; i < items.size(); ++i) {
     input_list->Add(Input(&(items[i]), "placeholder " + std::to_string(i)));
   }
 

examples/component/checkbox_in_frame.cpp

@@ -1,26 +1,22 @@
-#include <memory>  // for shared_ptr, __shared_ptr_access, allocator_traits<>::value_type
+#include <array>   // for array
+#include <memory>  // for shared_ptr, __shared_ptr_access
 #include <string>  // for operator+, to_string
-#include <vector>  // for vector
 
 #include "ftxui/component/captured_mouse.hpp"  // for ftxui
 #include "ftxui/component/component.hpp"  // for Checkbox, Renderer, Vertical
 #include "ftxui/component/component_base.hpp"      // for ComponentBase
 #include "ftxui/component/screen_interactive.hpp"  // for ScreenInteractive
-#include "ftxui/dom/elements.hpp"  // for operator|, Element, size, border, frame, HEIGHT, LESS_THAN
+#include "ftxui/dom/elements.hpp"  // for operator|, Element, size, border, frame, vscroll_indicator, HEIGHT, LESS_THAN
 
 using namespace ftxui;
 
-struct CheckboxState {
-  bool checked;
-};
+int main() {
+  std::array<bool, 30> states;
 
-int main(int argc, const char* argv[]) {
-  std::vector<CheckboxState> states(30);
   auto container = Container::Vertical({});
   for (int i = 0; i < 30; ++i) {
-    states[i].checked = false;
-    container->Add(
-        Checkbox("Checkbox" + std::to_string(i), &states[i].checked));
+    states[i] = false;
+    container->Add(Checkbox("Checkbox" + std::to_string(i), &states[i]));
   }
 
   auto renderer = Renderer(container, [&] {

examples/component/collapsible.cpp

@@ -26,7 +26,7 @@ Component Empty() {
   return std::make_shared<ComponentBase>();
 }
 
-int main(int argc, const char* argv[]) {
+int main() {
   auto component =
       Collapsible("Collapsible 1",
                   Inner({

examples/component/composition.cpp

@@ -4,7 +4,6 @@
 #include "ftxui/component/captured_mouse.hpp"  // for ftxui
 #include "ftxui/component/component.hpp"  // for Button, Horizontal, Renderer
 #include "ftxui/component/component_base.hpp"      // for ComponentBase
-#include "ftxui/component/component_options.hpp"   // for ButtonOption
 #include "ftxui/component/screen_interactive.hpp"  // for ScreenInteractive
 #include "ftxui/dom/elements.hpp"  // for text, separator, Element, operator|, vbox, border
 
@@ -12,25 +11,18 @@ using namespace ftxui;
 
 // An example of how to compose multiple components into one and maintain their
 // interactiveness.
-int main(int argc, const char* argv[]) {
-  auto button_option = ButtonOption();
-  button_option.border = false;
-
+int main() {
   auto left_count = 0;
   auto right_count = 0;
 
   auto left_buttons = Container::Horizontal({
-      Button(
-          "[Decrease]", [&] { left_count--; }, &button_option),
-      Button(
-          "[Increase]", [&] { left_count++; }, &button_option),
+      Button("Decrease", [&] { left_count--; }),
+      Button("Increase", [&] { left_count++; }),
   });
 
   auto right_buttons = Container::Horizontal({
-      Button(
-          "[Decrease]", [&] { right_count--; }, &button_option),
-      Button(
-          "[Increase]", [&] { right_count++; }, &button_option),
+      Button("Decrease", [&] { right_count--; }),
+      Button("Increase", [&] { right_count++; }),
   });
 
   // Renderer decorates its child with a new rendering function. The way the

examples/component/custom_loop.cpp

@@ -0,0 +1,55 @@
+#include <stdlib.h>                   // for EXIT_SUCCESS
+#include <chrono>                     // for milliseconds
+#include <ftxui/component/event.hpp>  // for Event
+#include <ftxui/component/mouse.hpp>  // for ftxui
+#include <ftxui/dom/elements.hpp>  // for text, separator, Element, operator|, vbox, border
+#include <memory>                  // for allocator, shared_ptr
+#include <string>                  // for operator+, to_string
+#include <thread>                  // for sleep_for
+
+#include "ftxui/component/component.hpp"  // for CatchEvent, Renderer, operator|=
+#include "ftxui/component/loop.hpp"       // for Loop
+#include "ftxui/component/screen_interactive.hpp"  // for ScreenInteractive
+
+int main() {
+  using namespace ftxui;
+  auto screen = ScreenInteractive::FitComponent();
+
+  // Create a component counting the number of frames drawn and event handled.
+  int custom_loop_count = 0;
+  int frame_count = 0;
+  int event_count = 0;
+  auto component = Renderer([&] {
+    frame_count++;
+    return vbox({
+               text("This demonstrates using a custom ftxui::Loop. It "),
+               text("runs at 100 iterations per seconds. The FTXUI events "),
+               text("are all processed once per iteration and a new frame "),
+               text("is rendered as needed"),
+               separator(),
+               text("ftxui event count: " + std::to_string(event_count)),
+               text("ftxui frame count: " + std::to_string(frame_count)),
+               text("Custom loop count: " + std::to_string(custom_loop_count)),
+           }) |
+           border;
+  });
+
+  component |= CatchEvent([&](Event) -> bool {
+    event_count++;
+    return false;
+  });
+
+  Loop loop(&screen, component);
+
+  while (!loop.HasQuitted()) {
+    custom_loop_count++;
+    loop.RunOnce();
+    std::this_thread::sleep_for(std::chrono::milliseconds(10));
+  }
+
+  return EXIT_SUCCESS;
+}
+
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.

examples/component/dropdown.cpp

@@ -5,7 +5,7 @@
 #include "ftxui/component/component.hpp"  // for Dropdown, Horizontal, Vertical
 #include "ftxui/component/screen_interactive.hpp"  // for ScreenInteractive
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
 
   std::vector<std::string> entries = {

examples/component/flexbox_gallery.cpp

@@ -13,7 +13,7 @@
 
 using namespace ftxui;
 
-int main(int argc, const char* argv[]) {
+int main() {
   auto screen = ScreenInteractive::Fullscreen();
 
   int direction_index = 0;

examples/component/focus.cpp

@@ -31,9 +31,9 @@ Element make_grid() {
   return gridbox(rows);
 };
 
-int main(int argc, const char* argv[]) {
-  float focus_x = 0.0f;
-  float focus_y = 0.0f;
+int main() {
+  float focus_x = 0.5f;
+  float focus_y = 0.5f;
 
   auto slider_x = Slider("x", &focus_x, 0.f, 1.f, 0.01f);
   auto slider_y = Slider("y", &focus_y, 0.f, 1.f, 0.01f);

examples/component/focus_cursor.cpp

@@ -0,0 +1,38 @@
+#include <ftxui/component/captured_mouse.hpp>  // for ftxui
+#include <string>  // for allocator, operator+, char_traits, string
+
+#include "ftxui/component/component.hpp"           // for Renderer, Vertical
+#include "ftxui/component/screen_interactive.hpp"  // for ScreenInteractive, Component
+#include "ftxui/dom/elements.hpp"  // for text, Decorator, focus, focusCursorBar, focusCursorBarBlinking, focusCursorBlock, focusCursorBlockBlinking, focusCursorUnderline, focusCursorUnderlineBlinking, hbox, Element
+
+using namespace ftxui;
+
+Component Instance(std::string label, Decorator focusCursor) {
+  return Renderer([=](bool focused) {
+    if (focused) {
+      return hbox({
+          text("> " + label + " "),
+          focusCursor(text(" ")),
+      });
+    }
+    return text("  " + label + " ");
+  });
+};
+
+int main() {
+  auto screen = ScreenInteractive::Fullscreen();
+  screen.Loop(Container::Vertical({
+      Instance("focus", focus),
+      Instance("focusCursorBlock", focusCursorBlock),
+      Instance("focusCursorBlockBlinking", focusCursorBlockBlinking),
+      Instance("focusCursorBar", focusCursorBar),
+      Instance("focusCursorBarBlinking", focusCursorBarBlinking),
+      Instance("focusCursorUnderline", focusCursorUnderline),
+      Instance("focusCursorUnderlineBlinking", focusCursorUnderlineBlinking),
+  }));
+  return 0;
+}
+
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.

examples/component/gallery.cpp

@@ -23,7 +23,7 @@ Component Wrap(std::string name, Component component) {
   });
 }
 
-int main(int argc, const char* argv[]) {
+int main() {
   auto screen = ScreenInteractive::FitComponent();
 
   // -- Menu

examples/component/homescreen.cpp

@@ -1,33 +1,35 @@
 #include <stddef.h>    // for size_t
 #include <array>       // for array
+#include <atomic>      // for atomic
 #include <chrono>      // for operator""s, chrono_literals
 #include <cmath>       // for sin
 #include <functional>  // for ref, reference_wrapper, function
 #include <memory>      // for allocator, shared_ptr, __shared_ptr_access
-#include <string>  // for string, basic_string, operator+, to_string, char_traits
+#include <string>  // for string, basic_string, char_traits, operator+, to_string
 #include <thread>   // for sleep_for, thread
 #include <utility>  // for move
 #include <vector>   // for vector
 
-#include "ftxui/component/captured_mouse.hpp"  // for ftxui
-#include "ftxui/component/component.hpp"  // for Checkbox, Renderer, Horizontal, Vertical, Input, Menu, Radiobox, ResizableSplitLeft, Tab, Toggle
-#include "ftxui/component/component_base.hpp"     // for ComponentBase
-#include "ftxui/component/component_options.hpp"  // for InputOption
+#include "../dom/color_info_sorted_2d.ipp"  // for ColorInfoSorted2D
+#include "ftxui/component/component.hpp"  // for Checkbox, Renderer, Horizontal, Vertical, Input, Menu, Radiobox, ResizableSplitLeft, Tab
+#include "ftxui/component/component_base.hpp"  // for ComponentBase, Component
+#include "ftxui/component/component_options.hpp"  // for MenuOption, InputOption
 #include "ftxui/component/event.hpp"              // for Event, Event::Custom
 #include "ftxui/component/screen_interactive.hpp"  // for Component, ScreenInteractive
-#include "ftxui/dom/elements.hpp"  // for text, operator|, color, bgcolor, filler, Element, size, vbox, flex, hbox, separator, graph, EQUAL, paragraph, hcenter, WIDTH, bold, window, border, vscroll_indicator, Elements, HEIGHT, hflow, frame, flex_grow, flexbox, gauge, paragraphAlignCenter, paragraphAlignJustify, paragraphAlignLeft, paragraphAlignRight, dim, spinner, Decorator, LESS_THAN, center, yflex, GREATER_THAN
-#include "ftxui/screen/color.hpp"  // for Color, Color::Blue, Color::BlueLight, Color::RedLight, Color::Black, Color::Cyan, Color::CyanLight, Color::GrayDark, Color::GrayLight, Color::Green, Color::GreenLight, Color::Magenta, Color::MagentaLight, Color::Red, Color::White, Color::Yellow, Color::YellowLight, Color::Default
-#include "ftxui/screen/terminal.hpp"  // for Size, Dimensions
+#include "ftxui/dom/elements.hpp"  // for text, color, operator|, bgcolor, filler, Element, vbox, size, hbox, separator, flex, window, graph, EQUAL, paragraph, WIDTH, hcenter, Elements, bold, vscroll_indicator, HEIGHT, flexbox, hflow, border, frame, flex_grow, gauge, paragraphAlignCenter, paragraphAlignJustify, paragraphAlignLeft, paragraphAlignRight, dim, spinner, LESS_THAN, center, yframe, GREATER_THAN
+#include "ftxui/dom/flexbox_config.hpp"  // for FlexboxConfig
+#include "ftxui/screen/color.hpp"  // for Color, Color::BlueLight, Color::RedLight, Color::Black, Color::Blue, Color::Cyan, Color::CyanLight, Color::GrayDark, Color::GrayLight, Color::Green, Color::GreenLight, Color::Magenta, Color::MagentaLight, Color::Red, Color::White, Color::Yellow, Color::YellowLight, Color::Default, Color::Palette256, ftxui
+#include "ftxui/screen/color_info.hpp"  // for ColorInfo
+#include "ftxui/screen/terminal.hpp"    // for Size, Dimensions
 
 using namespace ftxui;
 
-int main(int argc, const char* argv[]) {
+int main() {
   auto screen = ScreenInteractive::Fullscreen();
 
   // ---------------------------------------------------------------------------
   // HTOP
   // ---------------------------------------------------------------------------
-
   int shift = 0;
 
   auto my_graph = [&shift](int width, int height) {
@@ -95,7 +97,7 @@ int main(int argc, const char* argv[]) {
                separator(),
                ram | flex,
            }) |
-           flex | border;
+           flex;
   });
 
   // ---------------------------------------------------------------------------
@@ -255,7 +257,7 @@ int main(int argc, const char* argv[]) {
                }) | size(HEIGHT, LESS_THAN, 8),
                hflow(render_command()) | flex_grow,
            }) |
-           flex_grow | border;
+           flex_grow;
   });
 
   // ---------------------------------------------------------------------------
@@ -267,61 +269,116 @@ int main(int argc, const char* argv[]) {
       entries.push_back(spinner(i, shift / 2) | bold |
                         size(WIDTH, GREATER_THAN, 2) | border);
     }
-    return hflow(std::move(entries)) | border;
+    return hflow(std::move(entries));
   });
 
   // ---------------------------------------------------------------------------
   // Colors
   // ---------------------------------------------------------------------------
   auto color_tab_renderer = Renderer([] {
-    return hbox({
-               vbox({
-                   color(Color::Default, text("Default")),
-                   color(Color::Black, text("Black")),
-                   color(Color::GrayDark, text("GrayDark")),
-                   color(Color::GrayLight, text("GrayLight")),
-                   color(Color::White, text("White")),
-                   color(Color::Blue, text("Blue")),
-                   color(Color::BlueLight, text("BlueLight")),
-                   color(Color::Cyan, text("Cyan")),
-                   color(Color::CyanLight, text("CyanLight")),
-                   color(Color::Green, text("Green")),
-                   color(Color::GreenLight, text("GreenLight")),
-                   color(Color::Magenta, text("Magenta")),
-                   color(Color::MagentaLight, text("MagentaLight")),
-                   color(Color::Red, text("Red")),
-                   color(Color::RedLight, text("RedLight")),
-                   color(Color::Yellow, text("Yellow")),
-                   color(Color::YellowLight, text("YellowLight")),
-               }),
-               vbox({
-                   bgcolor(Color::Default, text("Default")),
-                   bgcolor(Color::Black, text("Black")),
-                   bgcolor(Color::GrayDark, text("GrayDark")),
-                   bgcolor(Color::GrayLight, text("GrayLight")),
-                   bgcolor(Color::White, text("White")),
-                   bgcolor(Color::Blue, text("Blue")),
-                   bgcolor(Color::BlueLight, text("BlueLight")),
-                   bgcolor(Color::Cyan, text("Cyan")),
-                   bgcolor(Color::CyanLight, text("CyanLight")),
-                   bgcolor(Color::Green, text("Green")),
-                   bgcolor(Color::GreenLight, text("GreenLight")),
-                   bgcolor(Color::Magenta, text("Magenta")),
-                   bgcolor(Color::MagentaLight, text("MagentaLight")),
-                   bgcolor(Color::Red, text("Red")),
-                   bgcolor(Color::RedLight, text("RedLight")),
-                   bgcolor(Color::Yellow, text("Yellow")),
-                   bgcolor(Color::YellowLight, text("YellowLight")),
-               }),
-           }) |
-           hcenter | border;
+    auto basic_color_display =
+        vbox({
+            text("16 color palette:"),
+            separator(),
+            hbox({
+                vbox({
+                    color(Color::Default, text("Default")),
+                    color(Color::Black, text("Black")),
+                    color(Color::GrayDark, text("GrayDark")),
+                    color(Color::GrayLight, text("GrayLight")),
+                    color(Color::White, text("White")),
+                    color(Color::Blue, text("Blue")),
+                    color(Color::BlueLight, text("BlueLight")),
+                    color(Color::Cyan, text("Cyan")),
+                    color(Color::CyanLight, text("CyanLight")),
+                    color(Color::Green, text("Green")),
+                    color(Color::GreenLight, text("GreenLight")),
+                    color(Color::Magenta, text("Magenta")),
+                    color(Color::MagentaLight, text("MagentaLight")),
+                    color(Color::Red, text("Red")),
+                    color(Color::RedLight, text("RedLight")),
+                    color(Color::Yellow, text("Yellow")),
+                    color(Color::YellowLight, text("YellowLight")),
+                }),
+                vbox({
+                    bgcolor(Color::Default, text("Default")),
+                    bgcolor(Color::Black, text("Black")),
+                    bgcolor(Color::GrayDark, text("GrayDark")),
+                    bgcolor(Color::GrayLight, text("GrayLight")),
+                    bgcolor(Color::White, text("White")),
+                    bgcolor(Color::Blue, text("Blue")),
+                    bgcolor(Color::BlueLight, text("BlueLight")),
+                    bgcolor(Color::Cyan, text("Cyan")),
+                    bgcolor(Color::CyanLight, text("CyanLight")),
+                    bgcolor(Color::Green, text("Green")),
+                    bgcolor(Color::GreenLight, text("GreenLight")),
+                    bgcolor(Color::Magenta, text("Magenta")),
+                    bgcolor(Color::MagentaLight, text("MagentaLight")),
+                    bgcolor(Color::Red, text("Red")),
+                    bgcolor(Color::RedLight, text("RedLight")),
+                    bgcolor(Color::Yellow, text("Yellow")),
+                    bgcolor(Color::YellowLight, text("YellowLight")),
+                }),
+            }),
+        }) |
+        border;
+
+    auto palette_256_color_display = text("256 colors palette:");
+    {
+      std::vector<std::vector<ColorInfo>> info_columns = ColorInfoSorted2D();
+      Elements columns;
+      for (auto& column : info_columns) {
+        Elements column_elements;
+        for (auto& it : column) {
+          column_elements.push_back(
+              text("   ") | bgcolor(Color(Color::Palette256(it.index_256))));
+        }
+        columns.push_back(hbox(std::move(column_elements)));
+      }
+      palette_256_color_display = vbox({
+                                      palette_256_color_display,
+                                      separator(),
+                                      vbox(columns),
+                                  }) |
+                                  border;
+    }
+
+    // True color display.
+    auto true_color_display = text("TrueColors: 24bits:");
+    {
+      int saturation = 255;
+      Elements array;
+      for (int value = 0; value < 255; value += 16) {
+        Elements line;
+        for (int hue = 0; hue < 255; hue += 6) {
+          line.push_back(text("▀")                                    //
+                         | color(Color::HSV(hue, saturation, value))  //
+                         | bgcolor(Color::HSV(hue, saturation, value + 8)));
+        }
+        array.push_back(hbox(std::move(line)));
+      }
+      true_color_display = vbox({
+                               true_color_display,
+                               separator(),
+                               vbox(std::move(array)),
+                           }) |
+                           border;
+    }
+
+    return flexbox(
+        {
+            basic_color_display,
+            palette_256_color_display,
+            true_color_display,
+        },
+        FlexboxConfig().SetGap(1, 1));
   });
 
   // ---------------------------------------------------------------------------
   // Gauges
   // ---------------------------------------------------------------------------
   auto render_gauge = [&shift](int delta) {
-    float progress = (shift + delta) % 1000 / 1000.f;
+    float progress = (shift + delta) % 500 / 500.f;
     return hbox({
         text(std::to_string(int(progress * 100)) + "% ") |
             size(WIDTH, EQUAL, 5),
@@ -331,25 +388,24 @@ int main(int argc, const char* argv[]) {
 
   auto gauge_component = Renderer([render_gauge] {
     return vbox({
-               render_gauge(0) | color(Color::Black),
-               render_gauge(100) | color(Color::GrayDark),
-               render_gauge(50) | color(Color::GrayLight),
-               render_gauge(6894) | color(Color::White),
-               separator(),
-               render_gauge(6841) | color(Color::Blue),
-               render_gauge(9813) | color(Color::BlueLight),
-               render_gauge(98765) | color(Color::Cyan),
-               render_gauge(98) | color(Color::CyanLight),
-               render_gauge(9846) | color(Color::Green),
-               render_gauge(1122) | color(Color::GreenLight),
-               render_gauge(84) | color(Color::Magenta),
-               render_gauge(645) | color(Color::MagentaLight),
-               render_gauge(568) | color(Color::Red),
-               render_gauge(2222) | color(Color::RedLight),
-               render_gauge(220) | color(Color::Yellow),
-               render_gauge(348) | color(Color::YellowLight),
-           }) |
-           border;
+        render_gauge(0) | color(Color::Black),
+        render_gauge(100) | color(Color::GrayDark),
+        render_gauge(50) | color(Color::GrayLight),
+        render_gauge(6894) | color(Color::White),
+        separator(),
+        render_gauge(6841) | color(Color::Blue),
+        render_gauge(9813) | color(Color::BlueLight),
+        render_gauge(98765) | color(Color::Cyan),
+        render_gauge(98) | color(Color::CyanLight),
+        render_gauge(9846) | color(Color::Green),
+        render_gauge(1122) | color(Color::GreenLight),
+        render_gauge(84) | color(Color::Magenta),
+        render_gauge(645) | color(Color::MagentaLight),
+        render_gauge(568) | color(Color::Red),
+        render_gauge(2222) | color(Color::RedLight),
+        render_gauge(220) | color(Color::Yellow),
+        render_gauge(348) | color(Color::YellowLight),
+    });
   });
 
   // ---------------------------------------------------------------------------
@@ -363,48 +419,36 @@ int main(int argc, const char* argv[]) {
   };
 
   auto paragraph_renderer_left = Renderer([&] {
-    auto title_style = bold | bgcolor(Color::Blue) | color(Color::Black);
     std::string str =
         "Lorem Ipsum is simply dummy text of the printing and typesetting "
         "industry. Lorem Ipsum has been the industry's standard dummy text "
         "ever since the 1500s, when an unknown printer took a galley of type "
         "and scrambled it to make a type specimen book.";
     return vbox({
-               // [ Left ]
-               text("Align left:") | title_style,
-               paragraphAlignLeft(str),
-               // [ Center ]
-               text("Align center:") | title_style,
-               paragraphAlignCenter(str),
-               // [ Right ]
-               text("Align right:") | title_style,
-               paragraphAlignRight(str),
-               // [ Justify]
-               text("Align justify:") | title_style,
-               paragraphAlignJustify(str),
-               // [ Side by side ]
-               text("Side by side:") | title_style,
-               hbox({
-                   paragraph(str),
-                   separator() | color(Color::Blue),
-                   paragraph(str),
-               }),
-               // [ Misc ]
-               text("Elements with different size:") | title_style,
-               flexbox({
-                   make_box(10, 5),
-                   make_box(9, 4),
-                   make_box(8, 4),
-                   make_box(6, 3),
-                   make_box(10, 5),
-                   make_box(9, 4),
-                   make_box(8, 4),
-                   make_box(6, 3),
-                   make_box(10, 5),
-                   make_box(9, 4),
-                   make_box(8, 4),
-                   make_box(6, 3),
-               }),
+               window(text("Align left:"), paragraphAlignLeft(str)),
+               window(text("Align center:"), paragraphAlignCenter(str)),
+               window(text("Align right:"), paragraphAlignRight(str)),
+               window(text("Align justify:"), paragraphAlignJustify(str)),
+               window(text("Side by side"), hbox({
+                                                paragraph(str),
+                                                separator(),
+                                                paragraph(str),
+                                            })),
+               window(text("Elements with different size:"),
+                      flexbox({
+                          make_box(10, 5),
+                          make_box(9, 4),
+                          make_box(8, 4),
+                          make_box(6, 3),
+                          make_box(10, 5),
+                          make_box(9, 4),
+                          make_box(8, 4),
+                          make_box(6, 3),
+                          make_box(10, 5),
+                          make_box(9, 4),
+                          make_box(8, 4),
+                          make_box(6, 3),
+                      })),
            }) |
            vscroll_indicator | yframe | flex;
   });
@@ -420,7 +464,7 @@ int main(int argc, const char* argv[]) {
                          &paragraph_renderer_split_position);
   auto paragraph_renderer_group_renderer =
       Renderer(paragraph_renderer_group,
-               [&] { return paragraph_renderer_group->Render() | border; });
+               [&] { return paragraph_renderer_group->Render(); });
 
   // ---------------------------------------------------------------------------
   // Tabs
@@ -430,7 +474,8 @@ int main(int argc, const char* argv[]) {
   std::vector<std::string> tab_entries = {
       "htop", "color", "spinner", "gauge", "compiler", "paragraph",
   };
-  auto tab_selection = Toggle(&tab_entries, &tab_index);
+  auto tab_selection =
+      Menu(&tab_entries, &tab_index, MenuOption::HorizontalAnimated());
   auto tab_content = Container::Tab(
       {
           htop,
@@ -450,18 +495,23 @@ int main(int argc, const char* argv[]) {
   auto main_renderer = Renderer(main_container, [&] {
     return vbox({
         text("FTXUI Demo") | bold | hcenter,
-        tab_selection->Render() | hcenter,
+        tab_selection->Render(),
         tab_content->Render() | flex,
     });
   });
 
-  bool refresh_ui_continue = true;
+  std::atomic<bool> refresh_ui_continue = true;
   std::thread refresh_ui([&] {
     while (refresh_ui_continue) {
       using namespace std::chrono_literals;
       std::this_thread::sleep_for(0.05s);
-      shift++;
-      screen.PostEvent(Event::Custom);
+      // The |shift| variable belong to the main thread. `screen.Post(task)`
+      // will execute the update on the thread where |screen| lives (e.g. the
+      // main thread). Using `screen.Post(task)` is threadsafe.
+      screen.Post([&] { shift++; });
+      // After updating the state, request a new frame to be drawn. This is done
+      // by simulating a new "custom" event to be handled.
+      screen.Post(Event::Custom);
     }
   });
 

examples/component/input.cpp

@@ -9,7 +9,7 @@
 #include "ftxui/dom/elements.hpp"  // for text, hbox, separator, Element, operator|, vbox, border
 #include "ftxui/util/ref.hpp"  // for Ref
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
 
   std::string first_name;

examples/component/linear_gradient_gallery.cpp

@@ -0,0 +1,56 @@
+#include <ftxui/component/component_base.hpp>  // for ComponentBase, Component
+#include <ftxui/dom/elements.hpp>  // for operator|, Element, flex, bgcolor, text, vbox, center
+#include <ftxui/dom/linear_gradient.hpp>  // for LinearGradient
+#include <ftxui/screen/color.hpp>         // for Color, Color::Blue, Color::Red
+#include <memory>                         // for __shared_ptr_access, shared_ptr
+#include <string>  // for allocator, operator+, char_traits, string, to_string
+
+#include "ftxui/component/captured_mouse.hpp"  // for ftxui
+#include "ftxui/component/component.hpp"       // for Slider, Renderer, Vertical
+#include "ftxui/component/screen_interactive.hpp"  // for ScreenInteractive
+
+int main() {
+  using namespace ftxui;
+  auto screen = ScreenInteractive::Fullscreen();
+
+  int angle = 180.f;
+  float start = 0.f;
+  float end = 1.f;
+
+  std::string slider_angle_text;
+  std::string slider_start_text;
+  std::string slider_end_text;
+
+  auto slider_angle = Slider(&slider_angle_text, &angle, 0, 360);
+  auto slider_start = Slider(&slider_start_text, &start, 0.f, 1.f);
+  auto slider_end = Slider(&slider_end_text, &end, 0.f, 1.f);
+
+  auto layout = Container::Vertical({
+      slider_angle,
+      slider_start,
+      slider_end,
+  });
+
+  auto renderer = Renderer(layout, [&] {
+    slider_angle_text = "angle = " + std::to_string(angle) + "°";
+    slider_start_text = "start = " + std::to_string(int(start * 100)) + "%";
+    slider_end_text = "end   = " + std::to_string(int(end * 100)) + "%";
+
+    auto background = text("Gradient") | center |
+                      bgcolor(LinearGradient()
+                                  .Angle(angle)
+                                  .Stop(Color::Blue, start)
+                                  .Stop(Color::Red, end));
+    return vbox({
+               background | flex,
+               layout->Render(),
+           }) |
+           flex;
+  });
+
+  screen.Loop(renderer);
+}
+
+// Copyright 2023 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.

examples/component/maybe.cpp

@@ -1,19 +1,16 @@
-#include <memory>  // for shared_ptr, __shared_ptr_access
-#include <string>  // for string, basic_string, allocator
+#include <string>  // for string, allocator, basic_string
 #include <vector>  // for vector
 
 #include "ftxui/component/captured_mouse.hpp"  // for ftxui
-#include "ftxui/component/component.hpp"  // for Checkbox, Maybe, Radiobox, Renderer, Vertical
-#include "ftxui/component/component_base.hpp"  // for ComponentBase
-#include "ftxui/component/screen_interactive.hpp"  // for Component, ScreenInteractive
-#include "ftxui/dom/elements.hpp"  // for Element, operator|, border
+#include "ftxui/component/component.hpp"  // for operator|, Maybe, Checkbox, Radiobox, Renderer, Vertical
+#include "ftxui/component/component_base.hpp"      // for Component
+#include "ftxui/component/screen_interactive.hpp"  // for ScreenInteractive
+#include "ftxui/dom/elements.hpp"  // for Element, border, color, operator|, text
+#include "ftxui/screen/color.hpp"  // for Color, Color::Red
 
 using namespace ftxui;
-Component Border(Component child) {
-  return Renderer(child, [child] { return child->Render() | border; });
-}
 
-int main(int argc, const char* argv[]) {
+int main() {
   std::vector<std::string> entries = {
       "entry 1",
       "entry 2",
@@ -21,20 +18,19 @@ int main(int argc, const char* argv[]) {
   };
   int menu_1_selected = 0;
   int menu_2_selected = 0;
-  auto menu_1 = Radiobox(&entries, &menu_1_selected);
-  auto menu_2 = Radiobox(&entries, &menu_2_selected);
-
-  menu_1 = Border(menu_1);
-  menu_2 = Border(menu_2);
 
   bool menu_1_show = false;
   bool menu_2_show = false;
 
   auto layout = Container::Vertical({
       Checkbox("Show menu_1", &menu_1_show),
-      Maybe(menu_1, &menu_1_show),
+      Radiobox(&entries, &menu_1_selected) | border | Maybe(&menu_1_show),
       Checkbox("Show menu_2", &menu_2_show),
-      Maybe(menu_2, &menu_2_show),
+      Radiobox(&entries, &menu_2_selected) | border | Maybe(&menu_2_show),
+
+      Renderer([] {
+        return text("You found the secret combinaison!") | color(Color::Red);
+      }) | Maybe([&] { return menu_1_selected == 1 && menu_2_selected == 2; }),
   });
 
   auto screen = ScreenInteractive::TerminalOutput();

examples/component/menu.cpp

@@ -8,7 +8,7 @@
 #include "ftxui/component/component_options.hpp"   // for MenuOption
 #include "ftxui/component/screen_interactive.hpp"  // for ScreenInteractive
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
   auto screen = ScreenInteractive::TerminalOutput();
 

examples/component/menu2.cpp

@@ -10,7 +10,7 @@
 #include "ftxui/component/screen_interactive.hpp"  // for Component, ScreenInteractive
 #include "ftxui/dom/elements.hpp"  // for text, separator, bold, hcenter, vbox, hbox, gauge, Element, operator|, border
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
   auto screen = ScreenInteractive::TerminalOutput();
 

examples/component/menu_entries.cpp

@@ -1,28 +1,34 @@
+#include <functional>  // for function
 #include <iostream>  // for basic_ostream::operator<<, operator<<, endl, basic_ostream, basic_ostream<>::__ostream_type, cout, ostream
-#include <memory>    // for shared_ptr, __shared_ptr_access
-#include <string>    // for to_string, allocator
+#include <memory>    // for allocator, shared_ptr, __shared_ptr_access
+#include <string>  // for char_traits, to_string, operator+, string, basic_string
 
 #include "ftxui/component/captured_mouse.hpp"  // for ftxui
 #include "ftxui/component/component.hpp"  // for MenuEntry, Renderer, Vertical
 #include "ftxui/component/component_base.hpp"      // for ComponentBase
 #include "ftxui/component/component_options.hpp"   // for MenuEntryOption
 #include "ftxui/component/screen_interactive.hpp"  // for ScreenInteractive
-#include "ftxui/dom/elements.hpp"  // for operator|, separator, Element, Decorator, color, text, hbox, size, bold, frame, inverted, vbox, HEIGHT, LESS_THAN, border
+#include "ftxui/dom/elements.hpp"  // for operator|, Element, separator, text, hbox, size, frame, color, vbox, HEIGHT, LESS_THAN, bold, border, inverted
 #include "ftxui/screen/color.hpp"  // for Color, Color::Blue, Color::Cyan, Color::Green, Color::Red, Color::Yellow
 
 using namespace ftxui;
 
 // Define a special style for some menu entry.
 MenuEntryOption Colored(ftxui::Color c) {
-  MenuEntryOption special_style;
-  special_style.style_normal = Decorator(color(c));
-  special_style.style_focused = Decorator(color(c)) | inverted;
-  special_style.style_selected = Decorator(color(c)) | bold;
-  special_style.style_selected_focused = Decorator(color(c)) | inverted | bold;
-  return special_style;
+  MenuEntryOption option;
+  option.transform = [c](EntryState state) {
+    state.label = (state.active ? "> " : "  ") + state.label;
+    Element e = text(state.label) | color(c);
+    if (state.focused)
+      e = e | inverted;
+    if (state.active)
+      e = e | bold;
+    return e;
+  };
+  return option;
 }
 
-int main(int argc, const char* argv[]) {
+int main() {
   auto screen = ScreenInteractive::TerminalOutput();
 
   int selected = 0;

examples/component/menu_entries_animated.cpp

@@ -0,0 +1,66 @@
+#include <iostream>  // for basic_ostream::operator<<, operator<<, endl, basic_ostream, basic_ostream<>::__ostream_type, cout, ostream
+#include <memory>    // for shared_ptr, __shared_ptr_access
+#include <string>    // for to_string, allocator
+
+#include "ftxui/component/captured_mouse.hpp"  // for ftxui
+#include "ftxui/component/component.hpp"  // for MenuEntryAnimated, Renderer, Vertical
+#include "ftxui/component/component_base.hpp"      // for ComponentBase
+#include "ftxui/component/component_options.hpp"   // for MenuEntryAnimated
+#include "ftxui/component/screen_interactive.hpp"  // for ScreenInteractive
+#include "ftxui/dom/elements.hpp"  // for operator|, separator, Element, Decorator, color, text, hbox, size, bold, frame, inverted, vbox, HEIGHT, LESS_THAN, border
+#include "ftxui/screen/color.hpp"  // for Color, Color::Blue, Color::Cyan, Color::Green, Color::Red, Color::Yellow
+
+using namespace ftxui;
+
+// Define a special style for some menu entry.
+MenuEntryOption Colored(ftxui::Color c) {
+  MenuEntryOption option;
+  option.animated_colors.foreground.enabled = true;
+  option.animated_colors.background.enabled = true;
+  option.animated_colors.background.active = c;
+  option.animated_colors.background.inactive = Color::Black;
+  option.animated_colors.foreground.active = Color::White;
+  option.animated_colors.foreground.inactive = c;
+  return option;
+}
+
+int main() {
+  auto screen = ScreenInteractive::TerminalOutput();
+
+  int selected = 0;
+  auto menu = Container::Vertical(
+      {
+          MenuEntry(" 1. rear", Colored(Color::Red)),
+          MenuEntry(" 2. drown", Colored(Color::Yellow)),
+          MenuEntry(" 3. nail", Colored(Color::Green)),
+          MenuEntry(" 4. quit", Colored(Color::Cyan)),
+          MenuEntry(" 5. decorative", Colored(Color::Blue)),
+          MenuEntry(" 7. costume"),
+          MenuEntry(" 8. pick"),
+          MenuEntry(" 9. oral"),
+          MenuEntry("11. minister"),
+          MenuEntry("12. football"),
+          MenuEntry("13. welcome"),
+          MenuEntry("14. copper"),
+          MenuEntry("15. inhabitant"),
+      },
+      &selected);
+
+  // Display together the menu with a border
+  auto renderer = Renderer(menu, [&] {
+    return vbox({
+               hbox(text("selected = "), text(std::to_string(selected))),
+               separator(),
+               menu->Render() | frame,
+           }) |
+           border | bgcolor(Color::Black);
+  });
+
+  screen.Loop(renderer);
+
+  std::cout << "Selected element = " << selected << std::endl;
+}
+
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.

examples/component/menu_in_frame.cpp

@@ -10,7 +10,7 @@
 
 using namespace ftxui;
 
-int main(int argc, const char* argv[]) {
+int main() {
   std::vector<std::string> entries;
   int selected = 0;
 

examples/component/menu_multiple.cpp

@@ -17,7 +17,7 @@ Component Window(std::string title, Component component) {
   });
 }
 
-int main(int argc, const char* argv[]) {
+int main() {
   int menu_selected[] = {0, 0, 0};
   std::vector<std::vector<std::string>> menu_entries = {
       {

examples/component/menu_style.cpp

@@ -1,100 +1,258 @@
+#include <array>       // for array
+#include <chrono>      // for milliseconds
 #include <functional>  // for function
-#include <memory>      // for shared_ptr, __shared_ptr_access, allocator
-#include <string>      // for string, basic_string
+#include <memory>      // for __shared_ptr_access, shared_ptr, allocator
+#include <string>      // for string, char_traits, operator+, basic_string
 #include <vector>      // for vector
 
-#include "ftxui/component/captured_mouse.hpp"  // for ftxui
-#include "ftxui/component/component.hpp"       // for Menu, Horizontal, Renderer
-#include "ftxui/component/component_base.hpp"  // for ComponentBase
-#include "ftxui/component/component_options.hpp"   // for MenuOption
-#include "ftxui/component/screen_interactive.hpp"  // for ScreenInteractive
-#include "ftxui/dom/elements.hpp"  // for operator|, color, separator, Decorator, bgcolor, flex, Element, bold, hbox, border, dim
-#include "ftxui/screen/color.hpp"  // for Color, Color::Blue, Color::BlueLight, Color::Red, Color::Yellow
+#include "ftxui/component/animation.hpp"  // for ElasticOut, Linear
+#include "ftxui/component/component.hpp"  // for Menu, Horizontal, Renderer, Vertical
+#include "ftxui/component/component_base.hpp"     // for ComponentBase
+#include "ftxui/component/component_options.hpp"  // for MenuOption, EntryState, MenuEntryOption, AnimatedColorOption, AnimatedColorsOption, UnderlineOption
+#include "ftxui/component/mouse.hpp"              // for ftxui
+#include "ftxui/component/screen_interactive.hpp"  // for Component, ScreenInteractive
+#include "ftxui/dom/elements.hpp"  // for separator, operator|, Element, text, bgcolor, hbox, bold, color, filler, border, vbox, borderDouble, dim, flex, hcenter
+#include "ftxui/screen/color.hpp"  // for Color, Color::Red, Color::Black, Color::Yellow, Color::Blue, Color::Default, Color::White
 
-int main(int argc, const char* argv[]) {
-  using namespace ftxui;
+using namespace ftxui;
+
+Component VMenu1(std::vector<std::string>* entries, int* selected);
+Component VMenu2(std::vector<std::string>* entries, int* selected);
+Component VMenu3(std::vector<std::string>* entries, int* selected);
+Component VMenu4(std::vector<std::string>* entries, int* selected);
+Component VMenu5(std::vector<std::string>* entries, int* selected);
+Component VMenu6(std::vector<std::string>* entries, int* selected);
+Component VMenu7(std::vector<std::string>* entries, int* selected);
+Component VMenu8(std::vector<std::string>* entries, int* selected);
+Component HMenu1(std::vector<std::string>* entries, int* selected);
+Component HMenu2(std::vector<std::string>* entries, int* selected);
+Component HMenu3(std::vector<std::string>* entries, int* selected);
+Component HMenu4(std::vector<std::string>* entries, int* selected);
+Component HMenu5(std::vector<std::string>* entries, int* selected);
+
+int main() {
   auto screen = ScreenInteractive::TerminalOutput();
 
-  std::vector<std::string> entries = {
-      "Monkey", "Dog", "Cat", "Bird", "Elephant",
+  std::vector<std::string> entries{
+      "Monkey", "Dog", "Cat", "Bird", "Elephant", "Cat",
   };
-  int menu_1_selected_ = 0;
-  int menu_2_selected_ = 0;
-  int menu_3_selected_ = 0;
-  int menu_4_selected_ = 0;
-  int menu_5_selected_ = 0;
-  int menu_6_selected_ = 0;
+  std::array<int, 12> selected = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
 
-  MenuOption option_1;
-  option_1.style_focused = bold | color(Color::Blue);
-  option_1.style_selected = color(Color::Blue);
-  option_1.style_selected_focused = bold | color(Color::Blue);
-  option_1.on_enter = screen.ExitLoopClosure();
-  auto menu_1_ = Menu(&entries, &menu_1_selected_, &option_1);
+  auto vmenu_1_ = VMenu1(&entries, &selected[0]);
+  auto vmenu_2_ = VMenu2(&entries, &selected[1]);
+  auto vmenu_3_ = VMenu3(&entries, &selected[2]);
+  auto vmenu_4_ = VMenu4(&entries, &selected[3]);
+  auto vmenu_5_ = VMenu5(&entries, &selected[4]);
+  auto vmenu_6_ = VMenu6(&entries, &selected[5]);
+  auto vmenu_7_ = VMenu7(&entries, &selected[6]);
+  auto vmenu_8_ = VMenu8(&entries, &selected[7]);
 
-  MenuOption option_2;
-  option_2.style_focused = bold | color(Color::Blue);
-  option_2.style_selected = color(Color::Blue);
-  option_2.style_selected_focused = bold | color(Color::Blue);
-  option_2.on_enter = screen.ExitLoopClosure();
-  auto menu_2_ = Menu(&entries, &menu_2_selected_, &option_2);
+  auto hmenu_1_ = HMenu1(&entries, &selected[8]);
+  auto hmenu_2_ = HMenu2(&entries, &selected[9]);
+  auto hmenu_3_ = HMenu3(&entries, &selected[10]);
+  auto hmenu_4_ = HMenu4(&entries, &selected[11]);
+  auto hmenu_5_ = HMenu5(&entries, &selected[12]);
 
-  MenuOption option_3;
-  option_3.style_selected = color(Color::Blue);
-  option_3.style_focused = bgcolor(Color::Blue);
-  option_3.style_selected_focused = bgcolor(Color::Blue);
-  option_3.on_enter = screen.ExitLoopClosure();
-  auto menu_3_ = Menu(&entries, &menu_3_selected_, &option_3);
-
-  MenuOption option_4;
-  option_4.style_selected = bgcolor(Color::Blue);
-  option_4.style_focused = bgcolor(Color::BlueLight);
-  option_4.style_selected_focused = bgcolor(Color::BlueLight);
-  option_4.on_enter = screen.ExitLoopClosure();
-  auto menu_4_ = Menu(&entries, &menu_4_selected_, &option_4);
-
-  MenuOption option_5;
-  option_5.style_normal = bgcolor(Color::Blue);
-  option_5.style_selected = bgcolor(Color::Yellow);
-  option_5.style_focused = bgcolor(Color::Red);
-  option_5.style_selected_focused = bgcolor(Color::Red);
-  option_5.on_enter = screen.ExitLoopClosure();
-  auto menu_5_ = Menu(&entries, &menu_5_selected_, &option_5);
-
-  MenuOption option_6;
-  option_6.style_normal = dim | color(Color::Blue);
-  option_6.style_selected = color(Color::Blue);
-  option_6.style_focused = bold | color(Color::Blue);
-  option_6.style_selected_focused = bold | color(Color::Blue);
-  option_6.on_enter = screen.ExitLoopClosure();
-  auto menu_6_ = Menu(&entries, &menu_6_selected_, &option_6);
-
-  auto container = Container::Horizontal({
-      menu_1_,
-      menu_2_,
-      menu_3_,
-      menu_4_,
-      menu_5_,
-      menu_6_,
+  auto container = Container::Vertical({
+      Container::Horizontal({
+          vmenu_1_,
+          vmenu_2_,
+          vmenu_3_,
+          vmenu_4_,
+          vmenu_5_,
+          vmenu_6_,
+          vmenu_7_,
+          vmenu_8_,
+      }),
+      hmenu_1_,
+      hmenu_2_,
+      hmenu_3_,
+      hmenu_4_,
+      hmenu_5_,
   });
 
-  // clang-format off
   auto renderer = Renderer(container, [&] {
-   return
-      hbox({
-        menu_1_->Render() | flex, separator(),
-        menu_2_->Render() | flex, separator(),
-        menu_3_->Render() | flex, separator(),
-        menu_4_->Render() | flex, separator(),
-        menu_5_->Render() | flex, separator(),
-        menu_6_->Render() | flex,
-      }) | border;
+    return  //
+        hbox({
+            vbox({
+                hbox({
+                    vmenu_1_->Render(),
+                    separator(),
+                    vmenu_2_->Render(),
+                    separator(),
+                    vmenu_3_->Render(),
+                    separator(),
+                    vmenu_4_->Render(),
+                    separator(),
+                    vmenu_5_->Render(),
+                    vmenu_6_->Render(),
+                    separator(),
+                    vmenu_7_->Render(),
+                    separator(),
+                    vmenu_8_->Render(),
+                }),
+                separator(),
+                hmenu_1_->Render(),
+                separator(),
+                hmenu_2_->Render(),
+                separator(),
+                hmenu_3_->Render(),
+                separator(),
+                hmenu_4_->Render(),
+                hmenu_5_->Render(),
+            }) | border,
+            filler(),
+        });
   });
-  // clang-format on
 
   screen.Loop(renderer);
 }
 
+Component VMenu1(std::vector<std::string>* entries, int* selected) {
+  auto option = MenuOption::Vertical();
+  option.entries.transform = [](EntryState state) {
+    state.label = (state.active ? "> " : "  ") + state.label;
+    Element e = text(state.label);
+    if (state.focused)
+      e = e | bgcolor(Color::Blue);
+    if (state.active)
+      e = e | bold;
+    return e;
+  };
+  return Menu(entries, selected, option);
+}
+
+Component VMenu2(std::vector<std::string>* entries, int* selected) {
+  auto option = MenuOption::Vertical();
+  option.entries.transform = [](EntryState state) {
+    state.label += (state.active ? " <" : "  ");
+    Element e = hbox(filler(), text(state.label));
+    if (state.focused)
+      e = e | bgcolor(Color::Red);
+    if (state.active)
+      e = e | bold;
+    return e;
+  };
+  return Menu(entries, selected, option);
+}
+
+Component VMenu3(std::vector<std::string>* entries, int* selected) {
+  auto option = MenuOption::Vertical();
+  option.entries.transform = [](EntryState state) {
+    Element e = state.active ? text("[" + state.label + "]")
+                             : text(" " + state.label + " ");
+    if (state.focused)
+      e = e | bold;
+
+    if (state.focused)
+      e = e | color(Color::Blue);
+    if (state.active)
+      e = e | bold;
+    return e;
+  };
+  return Menu(entries, selected, option);
+}
+
+Component VMenu4(std::vector<std::string>* entries, int* selected) {
+  auto option = MenuOption::Vertical();
+  option.entries.transform = [](EntryState state) {
+    if (state.active && state.focused) {
+      return text(state.label) | color(Color::Yellow) | bgcolor(Color::Black) |
+             bold;
+    }
+
+    if (state.active) {
+      return text(state.label) | color(Color::Yellow) | bgcolor(Color::Black);
+    }
+    if (state.focused) {
+      return text(state.label) | color(Color::Black) | bgcolor(Color::Yellow) |
+             bold;
+    }
+    return text(state.label) | color(Color::Black) | bgcolor(Color::Yellow);
+  };
+  return Menu(entries, selected, option);
+}
+
+Component VMenu5(std::vector<std::string>* entries, int* selected) {
+  auto option = MenuOption::Vertical();
+  option.entries.transform = [](EntryState state) {
+    auto element = text(state.label);
+    if (state.active && state.focused) {
+      return element | borderDouble;
+    }
+    if (state.active) {
+      return element | border;
+    }
+    if (state.focused) {
+      return element | bold;
+    }
+    return element;
+  };
+  return Menu(entries, selected, option);
+}
+
+Component VMenu6(std::vector<std::string>* entries, int* selected) {
+  auto option = MenuOption::VerticalAnimated();
+  option.underline.color_inactive = Color::Default;
+  option.underline.color_active = Color::Red;
+  option.underline.SetAnimationFunction(animation::easing::Linear);
+  return Menu(entries, selected, option);
+}
+
+Component VMenu7(std::vector<std::string>* entries, int* selected) {
+  auto option = MenuOption::Vertical();
+  option.entries.animated_colors.foreground.enabled = true;
+  option.entries.animated_colors.background.enabled = true;
+  option.entries.animated_colors.background.active = Color::Red;
+  option.entries.animated_colors.background.inactive = Color::Black;
+  option.entries.animated_colors.foreground.active = Color::White;
+  option.entries.animated_colors.foreground.inactive = Color::Red;
+  return Menu(entries, selected, option);
+}
+
+Component VMenu8(std::vector<std::string>* entries, int* selected) {
+  auto option = MenuOption::Vertical();
+  option.entries.animated_colors.foreground.Set(Color::Red, Color::White,
+                                                std::chrono::milliseconds(500));
+  return Menu(entries, selected, option);
+}
+
+Component HMenu1(std::vector<std::string>* entries, int* selected) {
+  return Menu(entries, selected, MenuOption::Horizontal());
+}
+
+Component HMenu2(std::vector<std::string>* entries, int* selected) {
+  return Menu(entries, selected, MenuOption::Toggle());
+}
+
+Component HMenu3(std::vector<std::string>* entries, int* selected) {
+  auto option = MenuOption::Toggle();
+  option.elements_infix = [] { return text(" 🮣🮠 "); };
+
+  return Menu(entries, selected, option);
+}
+
+Component HMenu4(std::vector<std::string>* entries, int* selected) {
+  return Menu(entries, selected, MenuOption::HorizontalAnimated());
+}
+
+Component HMenu5(std::vector<std::string>* entries, int* selected) {
+  auto option = MenuOption::HorizontalAnimated();
+  option.underline.SetAnimation(std::chrono::milliseconds(1500),
+                                animation::easing::ElasticOut);
+  option.entries.transform = [](EntryState state) {
+    Element e = text(state.label) | hcenter | flex;
+    if (state.active && state.focused)
+      e = e | bold;
+    if (!state.focused && !state.active)
+      e = e | dim;
+    return e;
+  };
+  option.underline.color_inactive = Color::Default;
+  option.underline.color_active = Color::Red;
+  return Menu(entries, selected, option);
+}
+
 // Copyright 2020 Arthur Sonzogni. All rights reserved.
 // Use of this source code is governed by the MIT license that can be found in
 // the LICENSE file.

examples/component/menu_underline_animated_gallery.cpp

@@ -0,0 +1,94 @@
+#include <chrono>  // for operator""ms, literals
+#include <memory>  // for allocator, shared_ptr, __shared_ptr_access
+#include <string>  // for string, operator+, to_string, basic_string
+#include <vector>  // for vector
+
+#include "ftxui/component/animation.hpp"       // for BackOut, Duration
+#include "ftxui/component/component.hpp"       // for Menu, Renderer, Vertical
+#include "ftxui/component/component_base.hpp"  // for ComponentBase
+#include "ftxui/component/component_options.hpp"  // for MenuOption, UnderlineOption
+#include "ftxui/component/mouse.hpp"              // for ftxui
+#include "ftxui/component/screen_interactive.hpp"  // for Component, ScreenInteractive
+#include "ftxui/dom/elements.hpp"  // for text, Element, operator|, borderEmpty, inverted
+#include "ftxui/screen/color.hpp"  // for Color, Color::Blue, Color::Red
+
+using namespace ftxui;
+
+Component DummyComponent(int id) {
+  return Renderer([id](bool focused) {
+    auto t = text("component " + std::to_string(id));
+    if (focused)
+      t = t | inverted;
+    return t;
+  });
+}
+
+Component Text(const std::string& t) {
+  return Renderer([t] { return text(t) | borderEmpty; });
+}
+
+int main() {
+  using namespace std::literals;
+  std::vector<std::string> tab_values{
+      "Tab 1", "Tab 2", "Tab 3", "A very very long tab", "탭",
+  };
+  int tab_selected = 0;
+
+  auto container = Container::Vertical({});
+
+  int frame_count = 0;
+  container->Add(Renderer(
+      [&] { return text("Frame count: " + std::to_string(frame_count++)); }));
+
+  {
+    auto option = MenuOption::HorizontalAnimated();
+    container->Add(Text("This demonstrate the Menu component"));
+    container->Add(Menu(&tab_values, &tab_selected, option));
+  }
+
+  {
+    container->Add(Text("Set underline color to blue"));
+    auto option = MenuOption::HorizontalAnimated();
+    option.underline.color_inactive = Color::Blue;
+    container->Add(Menu(&tab_values, &tab_selected, option));
+  }
+
+  {
+    container->Add(Text("Set underline active color to red"));
+    auto option = MenuOption::HorizontalAnimated();
+    option.underline.color_active = Color::Red;
+    container->Add(Menu(&tab_values, &tab_selected, option));
+  }
+
+  {
+    container->Add(Text("Set animation duration to 0ms"));
+    auto option = MenuOption::HorizontalAnimated();
+    option.underline.SetAnimationDuration(0ms);
+    container->Add(Menu(&tab_values, &tab_selected, option));
+  }
+
+  {
+    container->Add(Text("Set animation easing function to back-out"));
+    auto option = MenuOption::HorizontalAnimated();
+    option.underline.SetAnimationFunction(animation::easing::BackOut);
+    option.underline.SetAnimationDuration(350ms);
+    container->Add(Menu(&tab_values, &tab_selected, option));
+  }
+
+  // option.underline_animation_follower_delay = 250ms
+  {
+    container->Add(Text("Add delay to desynchronize animation"));
+    auto option = MenuOption::HorizontalAnimated();
+    option.underline.follower_delay = 250ms;
+    container->Add(Menu(&tab_values, &tab_selected, option));
+  }
+
+  container->SetActiveChild(container->ChildAt(2));
+
+  auto screen = ScreenInteractive::TerminalOutput();
+  screen.Loop(container);
+}
+
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.

examples/component/modal_dialog.cpp

@@ -1,94 +1,83 @@
-#include <memory>  // for allocator, shared_ptr, __shared_ptr_access
-#include <string>  // for string, basic_string, char_traits, operator+
-#include <vector>  // for vector
+#include <ftxui/component/component_options.hpp>  // for ButtonOption
+#include <ftxui/component/mouse.hpp>              // for ftxui
+#include <functional>                             // for function
+#include <memory>                                 // for allocator, shared_ptr
 
-#include "ftxui/component/captured_mouse.hpp"  // for ftxui
-#include "ftxui/component/component.hpp"  // for Button, Renderer, Horizontal, Tab
-#include "ftxui/component/component_base.hpp"      // for ComponentBase
-#include "ftxui/component/screen_interactive.hpp"  // for ScreenInteractive
-#include "ftxui/dom/elements.hpp"  // for operator|, Element, filler, text, hbox, separator, center, vbox, bold, border, clear_under, dbox, size, GREATER_THAN, HEIGHT
+#include "ftxui/component/component.hpp"  // for Button, operator|=, Renderer, Vertical, Modal
+#include "ftxui/component/screen_interactive.hpp"  // for ScreenInteractive, Component
+#include "ftxui/dom/elements.hpp"  // for operator|, separator, text, size, Element, vbox, border, GREATER_THAN, WIDTH, center, HEIGHT
+
+using namespace ftxui;
+
+auto button_style = ButtonOption::Animated();
+
+// Definition of the main component. The details are not important.
+Component MainComponent(std::function<void()> show_modal,
+                        std::function<void()> exit) {
+  auto component = Container::Vertical({
+      Button("Show modal", show_modal, button_style),
+      Button("Quit", exit, button_style),
+  });
+  // Polish how the two buttons are rendered:
+  component |= Renderer([&](Element inner) {
+    return vbox({
+               text("Main component"),
+               separator(),
+               inner,
+           })                                //
+           | size(WIDTH, GREATER_THAN, 15)   //
+           | size(HEIGHT, GREATER_THAN, 15)  //
+           | border                          //
+           | center;                         //
+  });
+  return component;
+}
+
+// Definition of the modal component. The details are not important.
+Component ModalComponent(std::function<void()> do_nothing,
+                         std::function<void()> hide_modal) {
+  auto component = Container::Vertical({
+      Button("Do nothing", do_nothing, button_style),
+      Button("Quit modal", hide_modal, button_style),
+  });
+  // Polish how the two buttons are rendered:
+  component |= Renderer([&](Element inner) {
+    return vbox({
+               text("Modal component "),
+               separator(),
+               inner,
+           })                               //
+           | size(WIDTH, GREATER_THAN, 30)  //
+           | border;                        //
+  });
+  return component;
+}
 
 int main(int argc, const char* argv[]) {
-  using namespace ftxui;
   auto screen = ScreenInteractive::TerminalOutput();
 
-  // There are two layers. One at depth = 0 and the modal window at depth = 1;
-  int depth = 0;
+  // State of the application:
+  bool modal_shown = false;
 
-  // The current rating of FTXUI.
-  std::string rating = "3/5 stars";
+  // Some actions modifying the state:
+  auto show_modal = [&] { modal_shown = true; };
+  auto hide_modal = [&] { modal_shown = false; };
+  auto exit = screen.ExitLoopClosure();
+  auto do_nothing = [&] {};
 
-  // At depth=0, two buttons. One for rating FTXUI and one for quitting.
-  auto button_rate_ftxui = Button("Rate FTXUI", [&] { depth = 1; });
-  auto button_quit = Button("Quit", screen.ExitLoopClosure());
+  // Instanciate the main and modal components:
+  auto main_component = MainComponent(show_modal, exit);
+  auto modal_component = ModalComponent(do_nothing, hide_modal);
 
-  auto depth_0_container = Container::Horizontal({
-      button_rate_ftxui,
-      button_quit,
-  });
-  auto depth_0_renderer = Renderer(depth_0_container, [&] {
-    return vbox({
-               text("Modal dialog example"),
-               separator(),
-               text("☆☆☆ FTXUI:" + rating + " ☆☆☆") | bold,
-               filler(),
-               hbox({
-                   button_rate_ftxui->Render(),
-                   filler(),
-                   button_quit->Render(),
-               }),
-           }) |
-           border | size(HEIGHT, GREATER_THAN, 18) | center;
-  });
+  // Use the `Modal` function to use together the main component and its modal
+  // window. The |modal_shown| boolean controls whether the modal is shown or
+  // not.
+  main_component |= Modal(modal_component, &modal_shown);
 
-  // At depth=1, The "modal" window.
-  std::vector<std::string> rating_labels = {
-      "1/5 stars", "2/5 stars", "3/5 stars", "4/5 stars", "5/5 stars",
-  };
-  auto on_rating = [&](std::string new_rating) {
-    rating = new_rating;
-    depth = 0;
-  };
-  auto depth_1_container = Container::Horizontal({
-      Button(&rating_labels[0], [&] { on_rating(rating_labels[0]); }),
-      Button(&rating_labels[1], [&] { on_rating(rating_labels[1]); }),
-      Button(&rating_labels[2], [&] { on_rating(rating_labels[2]); }),
-      Button(&rating_labels[3], [&] { on_rating(rating_labels[3]); }),
-      Button(&rating_labels[4], [&] { on_rating(rating_labels[4]); }),
-  });
-
-  auto depth_1_renderer = Renderer(depth_1_container, [&] {
-    return vbox({
-               text("Do you like FTXUI?"),
-               separator(),
-               hbox(depth_1_container->Render()),
-           }) |
-           border;
-  });
-
-  auto main_container = Container::Tab(
-      {
-          depth_0_renderer,
-          depth_1_renderer,
-      },
-      &depth);
-
-  auto main_renderer = Renderer(main_container, [&] {
-    Element document = depth_0_renderer->Render();
-
-    if (depth == 1) {
-      document = dbox({
-          document,
-          depth_1_renderer->Render() | clear_under | center,
-      });
-    }
-    return document;
-  });
-
-  screen.Loop(main_renderer);
+  screen.Loop(main_component);
   return 0;
 }
 
-// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Copyright 2022 Arthur Sonzogni. All rights reserved.
 // Use of this source code is governed by the MIT license that can be found in
 // the LICENSE file.

examples/component/modal_dialog_custom.cpp

@@ -0,0 +1,94 @@
+#include <memory>  // for allocator, shared_ptr, __shared_ptr_access
+#include <string>  // for string, basic_string, char_traits, operator+
+#include <vector>  // for vector
+
+#include "ftxui/component/captured_mouse.hpp"  // for ftxui
+#include "ftxui/component/component.hpp"  // for Button, Renderer, Horizontal, Tab
+#include "ftxui/component/component_base.hpp"      // for ComponentBase
+#include "ftxui/component/screen_interactive.hpp"  // for ScreenInteractive
+#include "ftxui/dom/elements.hpp"  // for operator|, Element, filler, text, hbox, separator, center, vbox, bold, border, clear_under, dbox, size, GREATER_THAN, HEIGHT
+
+int main() {
+  using namespace ftxui;
+  auto screen = ScreenInteractive::TerminalOutput();
+
+  // There are two layers. One at depth = 0 and the modal window at depth = 1;
+  int depth = 0;
+
+  // The current rating of FTXUI.
+  std::string rating = "3/5 stars";
+
+  // At depth=0, two buttons. One for rating FTXUI and one for quitting.
+  auto button_rate_ftxui = Button("Rate FTXUI", [&] { depth = 1; });
+  auto button_quit = Button("Quit", screen.ExitLoopClosure());
+
+  auto depth_0_container = Container::Horizontal({
+      button_rate_ftxui,
+      button_quit,
+  });
+  auto depth_0_renderer = Renderer(depth_0_container, [&] {
+    return vbox({
+               text("Modal dialog example"),
+               separator(),
+               text("☆☆☆ FTXUI:" + rating + " ☆☆☆") | bold,
+               filler(),
+               hbox({
+                   button_rate_ftxui->Render(),
+                   filler(),
+                   button_quit->Render(),
+               }),
+           }) |
+           border | size(HEIGHT, GREATER_THAN, 18) | center;
+  });
+
+  // At depth=1, The "modal" window.
+  std::vector<std::string> rating_labels = {
+      "1/5 stars", "2/5 stars", "3/5 stars", "4/5 stars", "5/5 stars",
+  };
+  auto on_rating = [&](std::string new_rating) {
+    rating = new_rating;
+    depth = 0;
+  };
+  auto depth_1_container = Container::Horizontal({
+      Button(&rating_labels[0], [&] { on_rating(rating_labels[0]); }),
+      Button(&rating_labels[1], [&] { on_rating(rating_labels[1]); }),
+      Button(&rating_labels[2], [&] { on_rating(rating_labels[2]); }),
+      Button(&rating_labels[3], [&] { on_rating(rating_labels[3]); }),
+      Button(&rating_labels[4], [&] { on_rating(rating_labels[4]); }),
+  });
+
+  auto depth_1_renderer = Renderer(depth_1_container, [&] {
+    return vbox({
+               text("Do you like FTXUI?"),
+               separator(),
+               hbox(depth_1_container->Render()),
+           }) |
+           border;
+  });
+
+  auto main_container = Container::Tab(
+      {
+          depth_0_renderer,
+          depth_1_renderer,
+      },
+      &depth);
+
+  auto main_renderer = Renderer(main_container, [&] {
+    Element document = depth_0_renderer->Render();
+
+    if (depth == 1) {
+      document = dbox({
+          document,
+          depth_1_renderer->Render() | clear_under | center,
+      });
+    }
+    return document;
+  });
+
+  screen.Loop(main_renderer);
+  return 0;
+}
+
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.

examples/component/nested_screen.cpp

@@ -35,7 +35,7 @@ void Nested(std::string path) {
   screen.Loop(renderer);
 }
 
-int main(int argc, const char* argv[]) {
+int main() {
   auto screen = ScreenInteractive::FitComponent();
   auto button_quit = Button("Quit", screen.ExitLoopClosure());
   auto button_nested = Button("Nested", [] { Nested(""); });

examples/component/print_key_press.cpp

@@ -25,7 +25,7 @@ std::string Stringify(Event event) {
 
   out = "(" + out + " ) -> ";
   if (event.is_character()) {
-    out += "character(" + event.character() + ")";
+    out += "Event::Character(\"" + event.character() + "\")";
   } else if (event.is_mouse()) {
     out += "mouse";
     switch (event.mouse().button) {
@@ -66,13 +66,75 @@ std::string Stringify(Event event) {
     out += "(" +  //
            std::to_string(event.mouse().x) + "," +
            std::to_string(event.mouse().y) + ")";
+  } else if (event == Event::ArrowLeft) {
+    out += "Event::ArrowLeft";
+  } else if (event == Event::ArrowRight) {
+    out += "Event::ArrowRight";
+  } else if (event == Event::ArrowUp) {
+    out += "Event::ArrowUp";
+  } else if (event == Event::ArrowDown) {
+    out += "Event::ArrowDown";
+  } else if (event == Event::ArrowLeftCtrl) {
+    out += "Event::ArrowLeftCtrl";
+  } else if (event == Event ::ArrowRightCtrl) {
+    out += "Event::ArrowRightCtrl";
+  } else if (event == Event::ArrowUpCtrl) {
+    out += "Event::ArrowUpCtrl";
+  } else if (event == Event::ArrowDownCtrl) {
+    out += "Event::ArrowDownCtrl";
+  } else if (event == Event::Backspace) {
+    out += "Event::Backspace";
+  } else if (event == Event::Delete) {
+    out += "Event::Delete";
+  } else if (event == Event::Escape) {
+    out += "Event::Escape";
+  } else if (event == Event::Return) {
+    out += "Event::Return";
+  } else if (event == Event::Tab) {
+    out += "Event::Tab";
+  } else if (event == Event::TabReverse) {
+    out += "Event::TabReverse";
+  } else if (event == Event::F1) {
+    out += "Event::F1";
+  } else if (event == Event::F2) {
+    out += "Event::F2";
+  } else if (event == Event::F3) {
+    out += "Event::F3";
+  } else if (event == Event::F4) {
+    out += "Event::F4";
+  } else if (event == Event::F5) {
+    out += "Event::F5";
+  } else if (event == Event::F6) {
+    out += "Event::F6";
+  } else if (event == Event::F7) {
+    out += "Event::F7";
+  } else if (event == Event::F8) {
+    out += "Event::F8";
+  } else if (event == Event::F9) {
+    out += "Event::F9";
+  } else if (event == Event::F10) {
+    out += "Event::F10";
+  } else if (event == Event::F11) {
+    out += "Event::F11";
+  } else if (event == Event::F12) {
+    out += "Event::F12";
+  } else if (event == Event::Home) {
+    out += "Event::Home";
+  } else if (event == Event::End) {
+    out += "Event::End";
+  } else if (event == Event::PageUp) {
+    out += "Event::PageUp";
+  } else if (event == Event::PageDown) {
+    out += "Event::PageDown";
+  } else if (event == Event::Custom) {
+    out += "Custom";
   } else {
     out += "(special)";
   }
   return out;
 }
 
-int main(int argc, const char* argv[]) {
+int main() {
   auto screen = ScreenInteractive::TerminalOutput();
 
   std::vector<Event> keys;
@@ -84,7 +146,7 @@ int main(int argc, const char* argv[]) {
     return window(text("keys"), vbox(std::move(children)));
   });
 
-  component = CatchEvent(component, [&](Event event) {
+  component |= CatchEvent([&](Event event) {
     keys.push_back(event);
     return true;
   });

examples/component/radiobox.cpp

@@ -7,7 +7,7 @@
 
 using namespace ftxui;
 
-int main(int argc, const char* argv[]) {
+int main() {
   std::vector<std::string> radiobox_list = {
       "Use gcc",
       "Use clang",

examples/component/radiobox_in_frame.cpp

@@ -10,7 +10,7 @@
 
 using namespace ftxui;
 
-int main(int argc, const char* argv[]) {
+int main() {
   std::vector<std::string> entries;
   int selected = 0;
 

examples/component/renderer.cpp

@@ -7,7 +7,7 @@
 #include "ftxui/dom/elements.hpp"  // for operator|, Element, text, bold, border, center, color
 #include "ftxui/screen/color.hpp"  // for Color, Color::Red
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
   auto screen = ScreenInteractive::FitComponent();
 

examples/component/resizable_split.cpp

@@ -8,7 +8,7 @@
 
 using namespace ftxui;
 
-int main(int argc, const char* argv[]) {
+int main() {
   auto screen = ScreenInteractive::Fullscreen();
 
   auto middle = Renderer([] { return text("middle") | center; });

examples/component/slider.cpp

@@ -4,7 +4,7 @@
 
 using namespace ftxui;
 
-int main(int argc, const char* argv[]) {
+int main() {
   auto screen = ScreenInteractive::TerminalOutput();
   int value = 50;
   auto slider = Slider("Value:", &value, 0, 100, 1);

examples/component/slider_direction.cpp

@@ -0,0 +1,49 @@
+#include <array>                                  // for array
+#include <cmath>                                  // for sin
+#include <ftxui/component/component_base.hpp>     // for ComponentBase
+#include <ftxui/component/component_options.hpp>  // for SliderOption
+#include <ftxui/dom/elements.hpp>  // for size, GREATER_THAN, GaugeDirection, GaugeDirection::Up, HEIGHT
+#include <ftxui/util/ref.hpp>  // for ConstRef, Ref
+#include <memory>              // for shared_ptr, __shared_ptr_access
+
+#include "ftxui/component/captured_mouse.hpp"  // for ftxui
+#include "ftxui/component/component.hpp"  // for Horizontal, Slider, operator|=
+#include "ftxui/component/screen_interactive.hpp"  // for ScreenInteractive
+
+using namespace ftxui;
+
+int main() {
+  auto screen = ScreenInteractive::TerminalOutput();
+  std::array<int, 30> values;
+  for (int i = 0; i < values.size(); ++i) {
+    values[i] = 50 + 20 * std::sin(i * 0.3);
+  }
+
+  auto layout_horizontal = Container::Horizontal({});
+  for (auto& value : values) {
+    // In C++17:
+    SliderOption<int> option;
+    option.value = &value;
+    option.max = 100;
+    option.increment = 5;
+    option.direction = GaugeDirection::Up;
+    layout_horizontal->Add(Slider<int>(option));
+
+    /* In C++20:
+    layout_horizontal->Add(Slider<int>({
+        .value = &values[i],
+        .max = 100,
+        .increment = 5,
+        .direction = GaugeDirection::Up,
+    }));
+    */
+  }
+
+  layout_horizontal |= size(HEIGHT, GREATER_THAN, 20);
+
+  screen.Loop(layout_horizontal);
+}
+
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.

examples/component/slider_rgb.cpp

@@ -23,7 +23,7 @@ Element ColorString(int red, int green, int blue) {
   );
 }
 
-int main(int argc, const char* argv[]) {
+int main() {
   int red = 128;
   int green = 25;
   int blue = 100;

examples/component/tab_horizontal.cpp

@@ -10,7 +10,7 @@
 
 using namespace ftxui;
 
-int main(int argc, const char* argv[]) {
+int main() {
   std::vector<std::string> tab_values{
       "tab_1",
       "tab_2",

examples/component/tab_vertical.cpp

@@ -10,7 +10,7 @@
 
 using namespace ftxui;
 
-int main(int argc, const char* argv[]) {
+int main() {
   std::vector<std::string> tab_values{
       "tab_1",
       "tab_2",

examples/component/toggle.cpp

@@ -10,7 +10,7 @@
 
 using namespace ftxui;
 
-int main(int argc, const char* argv[]) {
+int main() {
   std::vector<std::string> toggle_1_entries = {
       "On",
       "Off",

examples/component/with_restored_io.cpp

@@ -1,5 +1,13 @@
-#include "ftxui/component/component.hpp"           // for Menu
+#include <cstdlib>   // for system, EXIT_SUCCESS
+#include <iostream>  // for operator<<, basic_ostream, basic_ostream::operator<<, cout, endl, flush, ostream, basic_ostream<>::__ostream_type, cin
+#include <memory>    // for shared_ptr, __shared_ptr_access, allocator
+#include <string>    // for getline, string
+
+#include "ftxui/component/captured_mouse.hpp"  // for ftxui
+#include "ftxui/component/component.hpp"  // for Button, Horizontal, Renderer
+#include "ftxui/component/component_base.hpp"      // for ComponentBase
 #include "ftxui/component/screen_interactive.hpp"  // for ScreenInteractive
+#include "ftxui/dom/elements.hpp"  // for operator|, filler, Element, borderEmpty, hbox, size, paragraph, vbox, LESS_THAN, border, center, HEIGHT, WIDTH
 
 int main() {
   using namespace ftxui;
@@ -10,14 +18,12 @@ int main() {
   // temporarily uninstall the terminal hook and execute the provided callback
   // function. This allow running the application in a non-interactive mode.
   auto btn_run = Button("Execute with restored IO", screen.WithRestoredIO([] {
-        std::system("bash");
     std::cout << "This is a child program using stdin/stdout." << std::endl;
     for (int i = 0; i < 10; ++i) {
       std::cout << "Please enter 10 strings (" << i << "/10)" << std::flush;
       std::string input;
       std::getline(std::cin, input);
     }
-        std::system("bash");
   }));
 
   auto btn_quit = Button("Quit", screen.ExitLoopClosure());

examples/dom/CMakeLists.txt

@@ -1,18 +1,21 @@
 set(DIRECTORY_LIB dom)
 
 example(border)
+example(border_colored)
 example(border_style)
+example(canvas)
 example(color_gallery)
 example(color_info_palette256)
 example(color_truecolor_HSV)
 example(color_truecolor_RGB)
 example(dbox)
-example(canvas)
 example(gauge)
+example(gauge_direction)
 example(graph)
 example(gridbox)
 example(hflow)
 example(html_like)
+example(linear_gradient)
 example(package_manager)
 example(paragraph)
 example(separator)
@@ -24,8 +27,11 @@ example(style_bold)
 example(style_color)
 example(style_dim)
 example(style_gallery)
+example(style_hyperlink)
 example(style_inverted)
+example(style_strikethrough)
 example(style_underlined)
+example(style_underlined_double)
 example(table)
 example(vbox_hbox)
 example(vflow)

examples/dom/border.cpp

@@ -1,3 +1,4 @@
+#include <stdlib.h>                // for EXIT_SUCCESS
 #include <ftxui/dom/elements.hpp>  // for text, operator|, vbox, border, Element, Fit, hbox
 #include <ftxui/screen/screen.hpp>  // for Full, Screen
 #include <memory>                   // for allocator
@@ -5,7 +6,7 @@
 #include "ftxui/dom/node.hpp"      // for Render
 #include "ftxui/screen/color.hpp"  // for ftxui
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
   auto document =  //
       hbox({
@@ -30,6 +31,7 @@ int main(int argc, const char* argv[]) {
   auto screen = Screen::Create(Dimension::Full(), Dimension::Fit(document));
   Render(screen, document);
   screen.Print();
+  return EXIT_SUCCESS;
 }
 
 // Copyright 2020 Arthur Sonzogni. All rights reserved.

examples/dom/border_colored.cpp

@@ -0,0 +1,40 @@
+#include <ftxui/dom/elements.hpp>  // for operator|, text, Element, Fit, borderDouble, borderHeavy, borderLight, borderRounded, vbox
+#include <ftxui/screen/screen.hpp>  // for Screen
+#include <iostream>                 // for endl, cout, ostream
+#include <memory>                   // for allocator
+
+#include "ftxui/dom/node.hpp"      // for Render
+#include "ftxui/screen/color.hpp"  // for ftxui
+
+int main() {
+  using namespace ftxui;
+
+  auto make_boxed = [] {
+    return vbox({
+        text("borderLight") | borderStyled(LIGHT, Color::Red),
+        text("borderDashed") | borderStyled(DASHED, Color::Green),
+        text("borderHeavy") | borderStyled(HEAVY, Color::Blue),
+        text("borderDouble") | borderStyled(DOUBLE, Color::Yellow),
+        text("borderRounded") | borderStyled(ROUNDED, Color::Cyan),
+    });
+  };
+
+  auto document = hbox({
+                      make_boxed(),
+                      separator() | color(Color::Red),
+                      make_boxed(),
+                      separator() | color(Color::Red),
+                      make_boxed(),
+                  }) |
+                  borderStyled(ROUNDED, Color::Red);
+
+  auto screen =
+      Screen::Create(Dimension::Fit(document), Dimension::Fit(document));
+  Render(screen, document);
+  screen.Print();
+  std::cout << std::endl;
+}
+
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.

examples/dom/border_style.cpp

@@ -6,11 +6,12 @@
 #include "ftxui/dom/node.hpp"      // for Render
 #include "ftxui/screen/color.hpp"  // for ftxui
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
 
   auto document = vbox({
       text("borderLight") | borderLight,
+      text("borderDashed") | borderDashed,
       text("borderHeavy") | borderHeavy,
       text("borderDouble") | borderDouble,
       text("borderRounded") | borderRounded,

examples/dom/canvas.cpp

@@ -8,7 +8,7 @@
 #include "ftxui/dom/node.hpp"    // for Render
 #include "ftxui/screen/color.hpp"  // for Color, Color::Red, Color::Blue, Color::Green, ftxui
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
 
   auto c = Canvas(100, 100);
@@ -30,7 +30,7 @@ int main(int argc, const char* argv[]) {
   // Plot a function:
   std::vector<int> ys(100);
   for (int x = 0; x < 100; x++)
-    ys[x] = 80 + 20 * cos(x * 0.2);
+    ys[x] = int(80 + 20 * cos(x * 0.2));
   for (int x = 0; x < 99; x++)
     c.DrawPointLine(x, ys[x], x + 1, ys[x + 1], Color::Red);
 

examples/dom/color_gallery.cpp

@@ -5,13 +5,14 @@
 #include <utility>                    // for move
 #include <vector>                     // for vector
 
-using namespace ftxui;
-#include "./color_info_sorted_2d.ipp"  // for ColorInfoSorted2D
 #include "ftxui/dom/elements.hpp"  // for text, bgcolor, color, vbox, hbox, separator, operator|, Elements, Element, Fit, border
 #include "ftxui/dom/node.hpp"      // for Render
 #include "ftxui/screen/color.hpp"  // for Color, Color::Black, Color::Blue, Color::BlueLight, Color::Cyan, Color::CyanLight, Color::Default, Color::GrayDark, Color::GrayLight, Color::Green, Color::GreenLight, Color::Magenta, Color::MagentaLight, Color::Red, Color::RedLight, Color::White, Color::Yellow, Color::YellowLight, Color::Palette256, ftxui
 
-int main(int argc, const char* argv[]) {
+using namespace ftxui;
+#include "./color_info_sorted_2d.ipp"  // for ColorInfoSorted2D
+
+int main() {
   // clang-format off
   auto basic_color_display =
     vbox(
@@ -82,14 +83,18 @@ int main(int argc, const char* argv[]) {
   // True color display.
   auto true_color_display = text("TrueColors: 24bits:");
   {
-    int saturation = 255;
+    const int max_value = 255;
+    const int value_increment = 8;
+    const int hue_increment = 6;
+    int saturation = max_value;
     Elements array;
-    for (int value = 0; value < 255; value += 16) {
+    for (int value = 0; value < max_value; value += 2 * value_increment) {
       Elements line;
-      for (int hue = 0; hue < 255; hue += 6) {
-        line.push_back(text("▀")                                    //
-                       | color(Color::HSV(hue, saturation, value))  //
-                       | bgcolor(Color::HSV(hue, saturation, value + 8)));
+      for (int hue = 0; hue < max_value; hue += hue_increment) {
+        line.push_back(
+            text("▀")                                    //
+            | color(Color::HSV(hue, saturation, value))  //
+            | bgcolor(Color::HSV(hue, saturation, value + value_increment)));
       }
       array.push_back(hbox(std::move(line)));
     }

examples/dom/color_info_palette256.cpp

@@ -10,7 +10,7 @@
 using namespace ftxui;
 #include "./color_info_sorted_2d.ipp"  // for ColorInfoSorted2D
 
-int main(int argc, const char* argv[]) {
+int main() {
   std::vector<std::vector<ColorInfo>> info_columns = ColorInfoSorted2D();
 
   // Draw every columns

examples/dom/color_info_sorted_2d.ipp

@@ -1,12 +1,13 @@
-#include <cmath>
 #include <algorithm>
+#include <cmath>
+#include <ftxui/screen/color_info.hpp>  // for ftxui::ColorInfo
 
-std::vector<std::vector<ColorInfo>> ColorInfoSorted2D() {
+std::vector<std::vector<ftxui::ColorInfo>> ColorInfoSorted2D() {
   // Acquire the color information for the palette256.
-  std::vector<ColorInfo> info_gray;
-  std::vector<ColorInfo> info_color;
+  std::vector<ftxui::ColorInfo> info_gray;
+  std::vector<ftxui::ColorInfo> info_color;
   for (int i = 16; i < 256; ++i) {
-    ColorInfo info = GetColorInfo(Color::Palette256(i));
+    ftxui::ColorInfo info = GetColorInfo(ftxui::Color::Palette256(i));
     if (info.saturation == 0)
       info_gray.push_back(info);
     else
@@ -16,10 +17,10 @@ std::vector<std::vector<ColorInfo>> ColorInfoSorted2D() {
   // Sort info_color by hue.
   std::sort(
       info_color.begin(), info_color.end(),
-      [](const ColorInfo& A, const ColorInfo& B) { return A.hue < B.hue; });
+      [](const ftxui::ColorInfo& A, const ftxui::ColorInfo& B) { return A.hue < B.hue; });
 
   // Make 8 colums, one gray and seven colored.
-  std::vector<std::vector<ColorInfo>> info_columns(8);
+  std::vector<std::vector<ftxui::ColorInfo>> info_columns(8);
   info_columns[0] = info_gray;
   for (size_t i = 0; i < info_color.size(); ++i) {
     info_columns[1 + 7 * i / info_color.size()].push_back(info_color[i]);
@@ -28,13 +29,13 @@ std::vector<std::vector<ColorInfo>> ColorInfoSorted2D() {
   // Minimize discontinuities for every columns.
   for (auto& column : info_columns) {
     std::sort(column.begin(), column.end(),
-              [](const ColorInfo& A, const ColorInfo& B) {
+              [](const ftxui::ColorInfo& A, const ftxui::ColorInfo& B) {
                 return A.value < B.value;
               });
-    for (size_t i = 0; i < column.size() - 1; ++i) {
+    for (int i = 0; i < int(column.size()) - 1; ++i) {
       int best_index = i + 1;
       int best_distance = 255 * 255 * 3;
-      for (size_t j = i + 1; j < column.size(); ++j) {
+      for (int j = i + 1; j < column.size(); ++j) {
         int dx = column[i].red - column[j].red;
         int dy = column[i].green - column[j].green;
         int dz = column[i].blue - column[j].blue;

examples/dom/color_truecolor_HSV.cpp

@@ -6,7 +6,7 @@
 #include "ftxui/dom/node.hpp"      // for Render
 #include "ftxui/screen/color.hpp"  // for Color, ftxui
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
 
   int saturation = 255;

examples/dom/color_truecolor_RGB.cpp

@@ -6,7 +6,7 @@
 #include "ftxui/dom/node.hpp"      // for Render
 #include "ftxui/screen/color.hpp"  // for Color, ftxui
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
 
   int saturation = 255;

examples/dom/dbox.cpp

@@ -5,7 +5,7 @@
 #include "ftxui/dom/node.hpp"      // for Render
 #include "ftxui/screen/color.hpp"  // for ftxui
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
   auto document = dbox({
       vbox({

examples/dom/gauge.cpp

@@ -2,13 +2,13 @@
 #include <ftxui/dom/elements.hpp>  // for text, gauge, operator|, flex, hbox, Element
 #include <ftxui/screen/screen.hpp>  // for Screen
 #include <iostream>                 // for cout, endl, ostream
-#include <string>  // for allocator, operator+, char_traits, operator<<, string, to_string, basic_string
+#include <string>  // for allocator, char_traits, operator+, operator<<, string, to_string, basic_string
 #include <thread>  // for sleep_for
 
 #include "ftxui/dom/node.hpp"      // for Render
 #include "ftxui/screen/color.hpp"  // for ftxui
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
   using namespace std::chrono_literals;
 

examples/dom/gauge_direction.cpp

@@ -0,0 +1,79 @@
+#include <chrono>                  // for operator""s, chrono_literals
+#include <ftxui/dom/elements.hpp>  // for filler, operator|, separator, text, border, Element, vbox, vtext, hbox, center, gaugeDown, gaugeLeft, gaugeRight, gaugeUp
+#include <ftxui/screen/screen.hpp>  // for Screen
+#include <iostream>                 // for cout, endl, ostream
+#include <string>  // for allocator, operator+, operator<<, string, to_string
+#include <thread>  // for sleep_for
+
+#include "ftxui/dom/node.hpp"      // for Render
+#include "ftxui/screen/color.hpp"  // for ftxui
+
+int main() {
+  using namespace ftxui;
+  using namespace std::chrono_literals;
+
+  std::string reset_position;
+  for (float percentage = 0.0f; percentage <= 1.0f; percentage += 0.002f) {
+    std::string data_downloaded =
+        std::to_string(int(percentage * 5000)) + "/5000";
+
+    auto gauge_up =  //
+        hbox({
+            vtext("gauge vertical"),
+            separator(),
+            gaugeUp(percentage),
+        }) |
+        border;
+
+    auto gauge_down =  //
+        hbox({
+            vtext("gauge vertical"),
+            separator(),
+            gaugeDown(percentage),
+        }) |
+        border;
+
+    auto gauge_right =  //
+        vbox({
+            text("gauge horizontal"),
+            separator(),
+            gaugeRight(percentage),
+        }) |
+        border;
+
+    auto gauge_left =  //
+        vbox({
+            text("gauge horizontal"),
+            separator(),
+            gaugeLeft(percentage),
+        }) |
+        border;
+
+    auto document = hbox({
+        gauge_up,
+        filler(),
+        vbox({
+            gauge_right,
+            filler(),
+            text(data_downloaded) | border | center,
+            filler(),
+            gauge_left,
+        }),
+        filler(),
+        gauge_down,
+    });
+
+    auto screen = Screen(32, 16);
+    Render(screen, document);
+    std::cout << reset_position;
+    screen.Print();
+    reset_position = screen.ResetPosition();
+
+    std::this_thread::sleep_for(0.01s);
+  }
+  std::cout << std::endl;
+}
+
+// Copyright 2022 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.

examples/dom/graph.cpp

@@ -1,9 +1,10 @@
 #include <chrono>                  // for operator""s, chrono_literals
 #include <cmath>                   // for sin
-#include <ftxui/dom/elements.hpp>  // for operator|, graph, separator, color, Element, vbox, flex, inverted, Fit, hbox, size, border, GREATER_THAN, HEIGHT
+#include <ftxui/dom/elements.hpp>  // for graph, operator|, separator, color, Element, vbox, flex, inverted, operator|=, Fit, hbox, size, border, GREATER_THAN, HEIGHT
 #include <ftxui/screen/screen.hpp>  // for Full, Screen
 #include <functional>               // for ref, reference_wrapper
 #include <iostream>                 // for cout, ostream
+#include <memory>                   // for shared_ptr
 #include <string>                   // for operator<<, string
 #include <thread>                   // for sleep_for
 #include <vector>                   // for vector
@@ -13,15 +14,15 @@
 
 class Graph {
  public:
-  std::vector<int> operator()(int width, int height) {
+  std::vector<int> operator()(int width, int height) const {
     std::vector<int> output(width);
     for (int i = 0; i < width; ++i) {
       float v = 0;
-      v += 0.1f * sin((i + shift) * 0.1f);
-      v += 0.2f * sin((i + shift + 10) * 0.15f);
-      v += 0.1f * sin((i + shift) * 0.03f);
-      v *= height;
-      v += 0.5f * height;
+      v += 0.1f * sin((i + shift) * 0.1f);        // NOLINT
+      v += 0.2f * sin((i + shift + 10) * 0.15f);  // NOLINT
+      v += 0.1f * sin((i + shift) * 0.03f);       // NOLINT
+      v *= height;                                // NOLINT
+      v += 0.5f * height;                         // NOLINT
       output[i] = static_cast<int>(v);
     }
     return output;
@@ -37,7 +38,7 @@ std::vector<int> triangle(int width, int height) {
   return output;
 }
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
   using namespace std::chrono_literals;
 
@@ -45,23 +46,26 @@ int main(int argc, const char* argv[]) {
 
   std::string reset_position;
   for (int i = 0;; ++i) {
-    auto document =
-        hbox({
-            vbox({
-                graph(std::ref(my_graph)),
-                separator(),
-                graph(triangle) | inverted,
-            }) | flex,
+    auto document = hbox({
+        vbox({
+            graph(std::ref(my_graph)),
             separator(),
-            vbox({
-                graph(std::ref(my_graph)) | color(Color::BlueLight),
-                separator(),
-                graph(std::ref(my_graph)) | color(Color::RedLight),
-                separator(),
-                graph(std::ref(my_graph)) | color(Color::YellowLight),
-            }) | flex,
-        }) |
-        border | size(HEIGHT, GREATER_THAN, 40);
+            graph(triangle) | inverted,
+        }) | flex,
+        separator(),
+        vbox({
+            graph(std::ref(my_graph)) | color(Color::BlueLight),
+            separator(),
+            graph(std::ref(my_graph)) | color(Color::RedLight),
+            separator(),
+            graph(std::ref(my_graph)) | color(Color::YellowLight),
+        }) | flex,
+    });
+
+    document |= border;
+
+    const int min_width = 40;
+    document |= size(HEIGHT, GREATER_THAN, min_width);
 
     auto screen = Screen::Create(Dimension::Full(), Dimension::Fit(document));
     Render(screen, document);
@@ -69,7 +73,8 @@ int main(int argc, const char* argv[]) {
     screen.Print();
     reset_position = screen.ResetPosition();
 
-    std::this_thread::sleep_for(0.03s);
+    const auto sleep_time = 0.03s;
+    std::this_thread::sleep_for(sleep_time);
     my_graph.shift++;
   }
 

examples/dom/gridbox.cpp

@@ -6,7 +6,7 @@
 #include "ftxui/dom/node.hpp"      // for Render
 #include "ftxui/screen/color.hpp"  // for ftxui
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
   auto cell = [](const char* t) { return text(t) | border; };
   auto document =  //

examples/dom/hflow.cpp

@@ -1,16 +1,14 @@
-#include <stddef.h>                // for size_t
 #include <stdio.h>                 // for getchar
 #include <ftxui/dom/elements.hpp>  // for operator|, size, Element, text, hcenter, Decorator, Fit, WIDTH, hflow, window, EQUAL, GREATER_THAN, HEIGHT, bold, border, dim, LESS_THAN
 #include <ftxui/screen/screen.hpp>  // for Full, Screen
-#include <memory>                   // for allocator, shared_ptr
-#include <string>  // for operator+, to_string, char_traits, string
+#include <string>  // for allocator, char_traits, operator+, to_string, string
 
 #include "ftxui/dom/node.hpp"      // for Render
 #include "ftxui/screen/color.hpp"  // for ftxui
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
-  auto make_box = [](size_t dimx, size_t dimy) {
+  auto make_box = [](int dimx, int dimy) {
     std::string title = std::to_string(dimx) + "x" + std::to_string(dimy);
     return window(text(title) | hcenter | bold,
                   text("content") | hcenter | dim) |

examples/dom/html_like.cpp

@@ -1,16 +1,15 @@
 #include <chrono>                   // for operator""s, chrono_literals
-#include <ftxui/screen/screen.hpp>  // for Full, Screen
+#include <ftxui/screen/screen.hpp>  // for Screen
 #include <iostream>                 // for cout, ostream
-#include <memory>                   // for allocator, shared_ptr
-#include <string>                   // for operator<<, string
+#include <string>                   // for allocator, operator<<, string
 #include <thread>                   // for sleep_for
 
-#include "ftxui/dom/elements.hpp"  // for paragraph, text, operator|, Element, border, color, hflow, spinner, vbox, bold, dim, underlined
+#include "ftxui/dom/elements.hpp"  // for paragraph, text, operator|, Element, border, Fit, color, hflow, spinner, vbox, bold, dim, underlined
 #include "ftxui/dom/node.hpp"      // for Render
 #include "ftxui/screen/box.hpp"    // for ftxui
 #include "ftxui/screen/color.hpp"  // for Color, Color::Red
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
   using namespace std::chrono_literals;
 

examples/dom/linear_gradient.cpp

@@ -0,0 +1,26 @@
+#include <ftxui/dom/elements.hpp>  // for bgcolor, operator|, operator|=, text, center, Element
+#include <ftxui/dom/linear_gradient.hpp>  // for LinearGradient::Stop, LinearGradient
+#include <ftxui/screen/screen.hpp>        // for Full, Screen
+#include <memory>                         // for allocator, shared_ptr
+
+#include "ftxui/dom/node.hpp"  // for Render
+#include "ftxui/screen/color.hpp"  // for Color, Color::DeepPink1, Color::DeepSkyBlue1, Color::Yellow, ftxui
+
+int main() {
+  using namespace ftxui;
+  auto document = text("gradient") | center;
+
+  document |= bgcolor(LinearGradient()
+                          .Angle(45)
+                          .Stop(Color::DeepPink1)
+                          .Stop(Color::DeepSkyBlue1));
+  auto screen = Screen::Create(Dimension::Full(), Dimension::Full());
+  Render(screen, document);
+  screen.Print();
+
+  return 0;
+}
+
+// Copyright 2023 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.

examples/dom/package_manager.cpp

@@ -2,7 +2,7 @@
 #include <ftxui/dom/elements.hpp>  // for operator|, text, Element, hbox, bold, color, filler, separator, vbox, window, gauge, Fit, size, dim, EQUAL, WIDTH
 #include <ftxui/screen/screen.hpp>  // for Full, Screen
 #include <iostream>                 // for cout, endl, ostream
-#include <list>  // for list, operator!=, _List_iterator, _List_iterator<>::_Self
+#include <list>  // for list, operator==, _List_iterator, _List_iterator<>::_Self
 #include <memory>   // for allocator, shared_ptr, allocator_traits<>::value_type
 #include <string>   // for string, operator<<, to_string
 #include <thread>   // for sleep_for
@@ -12,7 +12,7 @@
 #include "ftxui/dom/node.hpp"  // for Render
 #include "ftxui/screen/color.hpp"  // for Color, Color::Green, Color::Red, Color::RedLight, ftxui
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
 
   struct Task {
@@ -41,7 +41,7 @@ int main(int argc, const char* argv[]) {
 
   int remaining_threads = 12;
 
-  int nb_queued = remaining_tasks.size();
+  int nb_queued = (int)remaining_tasks.size();
   int nb_active = 0;
   int nb_done = 0;
 

examples/dom/paragraph.cpp

@@ -10,13 +10,13 @@
 #include "ftxui/screen/box.hpp"    // for ftxui
 
 using namespace std::chrono_literals;
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
   std::string p =
       R"(In probability theory and statistics, Bayes' theorem (alternatively Bayes' law or Bayes' rule) describes the probability of an event, based on prior knowledge of conditions that might be related to the event. For example, if cancer is related to age, then, using Bayes' theorem, a person's age can be used to more accurately assess the probability that they have cancer, compared to the assessment of the probability of cancer made without knowledge of the person's age. One of the many applications of Bayes' theorem is Bayesian inference, a particular approach to statistical inference. When applied, the probabilities involved in Bayes' theorem may have different probability interpretations. With the Bayesian probability interpretation the theorem expresses how a subjective degree of belief should rationally change to account for availability of related evidence. Bayesian inference is fundamental to Bayesian statistics.)";
 
   std::string reset_position;
-  for (int i = 0;; ++i) {
+  while (true) {
     auto document = vbox({
                         hflow(paragraph(p)),
                         separator(),

examples/dom/separator.cpp

@@ -5,7 +5,7 @@
 #include "ftxui/dom/node.hpp"      // for Render
 #include "ftxui/screen/color.hpp"  // for ftxui
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
   auto document = hbox({
                       text("left-column"),

examples/dom/separator_style.cpp

@@ -6,7 +6,7 @@
 #include "ftxui/dom/node.hpp"      // for Render
 #include "ftxui/screen/box.hpp"    // for ftxui
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
 
   auto document = vbox({
@@ -16,6 +16,12 @@ int main(int argc, const char* argv[]) {
           hbox(text("left"), separatorLight(), text("right")),
       }) | borderLight,
 
+      vbox({
+          text("separatorDashed"),
+          separatorDashed(),
+          hbox(text("left"), separatorDashed(), text("right")),
+      }) | borderDashed,
+
       vbox({
           text("separatorHeavy"),
           separatorHeavy(),

examples/dom/size.cpp

@@ -7,7 +7,7 @@
 #include "ftxui/dom/node.hpp"      // for Render
 #include "ftxui/screen/color.hpp"  // for ftxui
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
   auto make_box = [](const std::string& title) {
     return window(text(title) | hcenter | bold,

examples/dom/spinner.cpp

@@ -10,14 +10,14 @@
 #include "ftxui/dom/node.hpp"      // for Render
 #include "ftxui/screen/color.hpp"  // for ftxui
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
   using namespace std::chrono_literals;
 
   std::string reset_position;
   for (int index = 0; index < 200; ++index) {
     std::vector<Element> entries;
-    for (int i = 0; i < 22; ++i) {
+    for (int i = 0; i < 23; ++i) {
       if (i != 0)
         entries.push_back(separator());
       entries.push_back(  //

examples/dom/style_blink.cpp

@@ -5,7 +5,7 @@
 #include "ftxui/dom/node.hpp"      // for Render
 #include "ftxui/screen/color.hpp"  // for ftxui
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
   auto document =  //
       hbox({

examples/dom/style_bold.cpp

@@ -5,7 +5,7 @@
 #include "ftxui/dom/node.hpp"      // for Render
 #include "ftxui/screen/color.hpp"  // for ftxui
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
   auto document =  //
       hbox({

examples/dom/style_color.cpp

@@ -1,59 +1,60 @@
-#include <ftxui/screen/screen.hpp>  // for Full, Screen
-#include <memory>                   // for allocator
+#include <ftxui/dom/linear_gradient.hpp>  // for LinearGradient
+#include <ftxui/screen/screen.hpp>        // for Full, Screen
+#include <memory>                         // for allocator
 
-#include "ftxui/dom/elements.hpp"  // for text, bgcolor, color, vbox, Fit, filler, hbox
+#include "ftxui/dom/elements.hpp"  // for text, bgcolor, color, vbox, filler, Fit, hbox
 #include "ftxui/dom/node.hpp"      // for Render
-#include "ftxui/screen/box.hpp"    // for ftxui
-#include "ftxui/screen/color.hpp"  // for Color, Color::Black, Color::Blue, Color::BlueLight, Color::Cyan, Color::CyanLight, Color::Default, Color::GrayDark, Color::GrayLight, Color::Green, Color::GreenLight, Color::Magenta, Color::MagentaLight, Color::Red, Color::RedLight, Color::White, Color::Yellow, Color::YellowLight
+#include "ftxui/screen/color.hpp"  // for Color, operator""_rgb, Color::Black, Color::Blue, Color::BlueLight, Color::Cyan, Color::CyanLight, Color::DeepSkyBlue4, Color::Default, Color::GrayDark, Color::GrayLight, Color::Green, Color::GreenLight, Color::Magenta, Color::MagentaLight, Color::Red, Color::RedLight, Color::SkyBlue1, Color::White, Color::Yellow, Color::YellowLight, ftxui
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
-  // clang-format off
-  auto document =
-    hbox(
-      vbox(
-        color(Color::Default, text("Default")),
-        color(Color::Black, text("Black")),
-        color(Color::GrayDark, text("GrayDark")),
-        color(Color::GrayLight, text("GrayLight")),
-        color(Color::White, text("White")),
-        color(Color::Blue, text("Blue")),
-        color(Color::BlueLight, text("BlueLight")),
-        color(Color::Cyan, text("Cyan")),
-        color(Color::CyanLight, text("CyanLight")),
-        color(Color::Green, text("Green")),
-        color(Color::GreenLight, text("GreenLight")),
-        color(Color::Magenta, text("Magenta")),
-        color(Color::MagentaLight, text("MagentaLight")),
-        color(Color::Red, text("Red")),
-        color(Color::RedLight, text("RedLight")),
-        color(Color::Yellow, text("Yellow")),
-        color(Color::YellowLight, text("YellowLight")),
-        color(0x66ff66_rgb, text("Phosphor"))
-      ),
-      vbox(
-        bgcolor(Color::Default, text("Default")),
-        bgcolor(Color::Black, text("Black")),
-        bgcolor(Color::GrayDark, text("GrayDark")),
-        bgcolor(Color::GrayLight, text("GrayLight")),
-        bgcolor(Color::White, text("White")),
-        bgcolor(Color::Blue, text("Blue")),
-        bgcolor(Color::BlueLight, text("BlueLight")),
-        bgcolor(Color::Cyan, text("Cyan")),
-        bgcolor(Color::CyanLight, text("CyanLight")),
-        bgcolor(Color::Green, text("Green")),
-        bgcolor(Color::GreenLight, text("GreenLight")),
-        bgcolor(Color::Magenta, text("Magenta")),
-        bgcolor(Color::MagentaLight, text("MagentaLight")),
-        bgcolor(Color::Red, text("Red")),
-        bgcolor(Color::RedLight, text("RedLight")),
-        bgcolor(Color::Yellow, text("Yellow")),
-        bgcolor(Color::YellowLight, text("YellowLight")),
-        bgcolor(0x66ff66_rgb, text("Phosphor"))
-      ),
-      filler()
-    );
-  // clang-format on
+  auto document = hbox({
+      vbox({
+          color(Color::Default, text("Default")),
+          color(Color::Black, text("Black")),
+          color(Color::GrayDark, text("GrayDark")),
+          color(Color::GrayLight, text("GrayLight")),
+          color(Color::White, text("White")),
+          color(Color::Blue, text("Blue")),
+          color(Color::BlueLight, text("BlueLight")),
+          color(Color::Cyan, text("Cyan")),
+          color(Color::CyanLight, text("CyanLight")),
+          color(Color::Green, text("Green")),
+          color(Color::GreenLight, text("GreenLight")),
+          color(Color::Magenta, text("Magenta")),
+          color(Color::MagentaLight, text("MagentaLight")),
+          color(Color::Red, text("Red")),
+          color(Color::RedLight, text("RedLight")),
+          color(Color::Yellow, text("Yellow")),
+          color(Color::YellowLight, text("YellowLight")),
+          color(0x66ff66_rgb, text("Phosphor")),
+          color(LinearGradient(Color::SkyBlue1, Color::DeepSkyBlue4),
+                text("Skyblue to DeepSkyBlue")),
+      }),
+      vbox({
+          bgcolor(Color::Default, text("Default")),
+          bgcolor(Color::Black, text("Black")),
+          bgcolor(Color::GrayDark, text("GrayDark")),
+          bgcolor(Color::GrayLight, text("GrayLight")),
+          bgcolor(Color::White, text("White")),
+          bgcolor(Color::Blue, text("Blue")),
+          bgcolor(Color::BlueLight, text("BlueLight")),
+          bgcolor(Color::Cyan, text("Cyan")),
+          bgcolor(Color::CyanLight, text("CyanLight")),
+          bgcolor(Color::Green, text("Green")),
+          bgcolor(Color::GreenLight, text("GreenLight")),
+          bgcolor(Color::Magenta, text("Magenta")),
+          bgcolor(Color::MagentaLight, text("MagentaLight")),
+          bgcolor(Color::Red, text("Red")),
+          bgcolor(Color::RedLight, text("RedLight")),
+          bgcolor(Color::Yellow, text("Yellow")),
+          bgcolor(Color::YellowLight, text("YellowLight")),
+          bgcolor(0x66ff66_rgb, text("Phosphor")),
+          bgcolor(LinearGradient(Color::SkyBlue1, Color::DeepSkyBlue4),
+                  text("Skyblue to DeepSkyBlue")),
+      }),
+      filler(),
+  });
 
   auto screen = Screen::Create(Dimension::Full(), Dimension::Fit(document));
   Render(screen, document);

examples/dom/style_dim.cpp

@@ -5,7 +5,7 @@
 #include "ftxui/dom/node.hpp"      // for Render
 #include "ftxui/screen/color.hpp"  // for ftxui
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
   auto document =  //
       hbox({

examples/dom/style_gallery.cpp

@@ -5,19 +5,22 @@
 #include "ftxui/dom/node.hpp"      // for Render
 #include "ftxui/screen/color.hpp"  // for Color, Color::Blue, ftxui
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
   // clang-format off
   auto document =
     hbox({
-      text("normal")                           , text(" ") ,
-      text("bold")      | bold                 , text(" ") ,
-      text("dim")       | dim                  , text(" ") ,
-      text("inverted")  | inverted             , text(" ") ,
-      text("underlined")| underlined           , text(" ") ,
-      text("blink")     | blink                , text(" ") ,
-      text("color")     | color(Color::Blue)   , text(" ") ,
-      text("bgcolor")   | bgcolor(Color::Blue),
+      text("normal")                                    , text(" ") ,
+      text("bold")               | bold                 , text(" ") ,
+      text("dim")                | dim                  , text(" ") ,
+      text("inverted")           | inverted             , text(" ") ,
+      text("underlined")         | underlined           , text(" ") ,
+      text("underlinedDouble")   | underlinedDouble     , text(" ") ,
+      text("blink")              | blink                , text(" ") ,
+      text("strikethrough")      | strikethrough        , text(" ") ,
+      text("color")              | color(Color::Blue)   , text(" ") ,
+      text("bgcolor")            | bgcolor(Color::Blue) , text(" ") ,
+      text("hyperlink")          | hyperlink("https://github.com/ArthurSonzogni/FTXUI"),
     });
   // clang-format on
   auto screen = Screen::Create(Dimension::Full(), Dimension::Fit(document));

examples/dom/style_hyperlink.cpp

@@ -0,0 +1,25 @@
+#include <ftxui/dom/elements.hpp>  // for text, operator|, bold, Fit, hbox, Element
+#include <ftxui/screen/screen.hpp>  // for Full, Screen
+#include <memory>                   // for allocator
+
+#include "ftxui/dom/node.hpp"      // for Render
+#include "ftxui/screen/color.hpp"  // for ftxui
+
+int main() {
+  using namespace ftxui;
+  auto document =  //
+      hbox({
+          text("This text is an "),
+          text("hyperlink") | hyperlink("https://www.google.com"),
+          text(". Do you like it?"),
+      });
+  auto screen = Screen::Create(Dimension::Full(), Dimension::Fit(document));
+  Render(screen, document);
+  screen.Print();
+
+  return 0;
+}
+
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.

examples/dom/style_inverted.cpp

@@ -5,7 +5,7 @@
 #include "ftxui/dom/node.hpp"      // for Render
 #include "ftxui/screen/color.hpp"  // for ftxui
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
   auto document = hbox({
       text("This text is "),

examples/dom/style_strikethrough.cpp

@@ -0,0 +1,25 @@
+#include <ftxui/dom/elements.hpp>  // for text, operator|, strikethrough, Fit, hbox, Element
+#include <ftxui/screen/screen.hpp>  // for Full, Screen
+#include <memory>                   // for allocator
+
+#include "ftxui/dom/node.hpp"      // for Render
+#include "ftxui/screen/color.hpp"  // for ftxui
+
+int main() {
+  using namespace ftxui;
+  auto document =  //
+      hbox({
+          text("This text is "),
+          text("strikethrough") | strikethrough,
+          text(". Do you like it?"),
+      });
+  auto screen = Screen::Create(Dimension::Full(), Dimension::Fit(document));
+  Render(screen, document);
+  screen.Print();
+
+  return 0;
+}
+
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.

examples/dom/style_underlined.cpp

@@ -5,7 +5,7 @@
 #include "ftxui/dom/node.hpp"      // for Render
 #include "ftxui/screen/color.hpp"  // for ftxui
 
-int main(int argc, const char* argv[]) {
+int main() {
   using namespace ftxui;
   auto document =  //
       hbox({

examples/dom/style_underlined_double.cpp

@@ -0,0 +1,25 @@
+#include <ftxui/dom/elements.hpp>  // for text, operator|, underlinedDouble, Fit, hbox, Element
+#include <ftxui/screen/screen.hpp>  // for Full, Screen
+#include <memory>                   // for allocator
+
+#include "ftxui/dom/node.hpp"      // for Render
+#include "ftxui/screen/color.hpp"  // for ftxui
+
+int main() {
+  using namespace ftxui;
+  auto document =  //
+      hbox({
+          text("This text is "),
+          text("underlinedDouble") | underlinedDouble,
+          text(". Do you like it?"),
+      });
+  auto screen = Screen::Create(Dimension::Full(), Dimension::Fit(document));
+  Render(screen, document);
+  screen.Print();
+
+  return 0;
+}
+
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.